From 60ae464ea20d50f7c9fc096994061e5208ea91d1 Mon Sep 17 00:00:00 2001 From: narawat Date: Wed, 13 May 2026 16:02:50 +0700 Subject: [PATCH 1/7] update --- src/NATSBridge.jl | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/src/NATSBridge.jl b/src/NATSBridge.jl index fd152f5..ae65770 100644 --- a/src/NATSBridge.jl +++ b/src/NATSBridge.jl @@ -803,14 +803,15 @@ env = smartreceive(msg; fileserver_download_handler=_fetch_with_backoff, max_ret ``` """ function smartreceive( - msg::NATS.Msg; + msg_json_str::String; # get it from String(nats_msg.payload) fileserver_download_handler::Function = _fetch_with_backoff, max_retries::Int = 5, base_delay::Int = 100, max_delay::Int = 5000 )::JSON.Object{String, Any} + # Parse the JSON envelope - env_json_obj = JSON.parse(String(msg.payload)) + env_json_obj = JSON.parse(msg_json_str) log_trace(env_json_obj["correlation_id"], "Processing received message") # Log message processing start # Process all payloads in the envelope From 8ada1ca49c7ac645ff004ee3ce4336a43f17b11e Mon Sep 17 00:00:00 2001 From: narawat Date: Wed, 13 May 2026 16:08:29 +0700 Subject: [PATCH 2/7] update --- src/NATSBridge.jl | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/src/NATSBridge.jl b/src/NATSBridge.jl index ae65770..26ea775 100644 --- a/src/NATSBridge.jl +++ b/src/NATSBridge.jl @@ -783,7 +783,7 @@ A HTTP file server is required along with its download function. 5. For link transport: fetches data from URL with exponential backoff, then deserializes # Arguments: - - `msg::NATS.Msg` - NATS message to process + - `msg_json_str::String` - JSON string from NATS message payload (e.g., `String(nats_msg.payload)`) # Keyword Arguments: - `fileserver_download_handler::Function = _fetch_with_backoff` - Function to handle downloading data from file server URLs @@ -798,7 +798,8 @@ A HTTP file server is required along with its download function. ```jldoctest # Receive and process message msg = nats_message # NATS message -env = smartreceive(msg; fileserver_download_handler=_fetch_with_backoff, max_retries=5, base_delay=100, max_delay=5000) +msg_json_str = String(msg.payload) +env = smartreceive(msg_json_str; fileserver_download_handler=_fetch_with_backoff, max_retries=5, base_delay=100, max_delay=5000) # env["payloads"] = [("dataname1", data1, "type1"), ("dataname2", data2, "type2"), ...] ``` """ From 34a6d193037758f9fe9e038f3e988b54afb32e55 Mon Sep 17 00:00:00 2001 From: narawat Date: Wed, 13 May 2026 16:25:48 +0700 Subject: [PATCH 3/7] update jl docstring --- src/NATSBridge.jl | 51 ++++++++++++++++++++++++----------------------- 1 file changed, 26 insertions(+), 25 deletions(-) diff --git a/src/NATSBridge.jl b/src/NATSBridge.jl index 26ea775..4b38fec 100644 --- a/src/NATSBridge.jl +++ b/src/NATSBridge.jl @@ -340,8 +340,8 @@ end """ smartsend - Send data either directly via NATS or via a fileserver URL, depending on payload size This function intelligently routes data delivery based on payload size relative to a threshold. -If the serialized payload is smaller than `size_threshold`, it encodes the data as Base64 and publishes directly over NATS. -Otherwise, it uploads the data to a fileserver (by default using `plik_oneshot_upload`) and publishes only the download URL over NATS. +If the serialized payload is smaller than `size_threshold`, it encodes the data as Base64 and constructs a "direct" msg_payload_v1. +Otherwise, it uploads the data to a fileserver (by default using `plik_oneshot_upload`) and constructs a "link" msg_payload_v1 with the download URL. The function accepts a list of (dataname, data, type) tuples as input and processes each payload individually. Each payload can have a different type, enabling mixed-content messages (e.g., chat with text, images, audio). @@ -352,13 +352,13 @@ Each payload can have a different type, enabling mixed-content messages (e.g., c 3. Compares the serialized size against `size_threshold` 4. For small payloads: encodes as Base64, constructs a "direct" msg_payload_v1 5. For large payloads: uploads to the fileserver, constructs a "link" msg_payload_v1 with the URL -6. Converts envelope to JSON string and optionally publishes to NATS +6. Converts envelope to JSON string and returns (NATS publishing is not performed by this function) # Arguments: - `subject::String` - NATS subject to publish the message to - - `data::AbstractArray{Tuple{String, Any, String}}` - List of (dataname, data, type) tuples to send + - `data::AbstractArray{Tuple{String, T1, String}, 1}` - List of (dataname, data, type) tuples to send - `dataname::String` - Name of the payload - - `data::Any` - The actual data to send + - `data::T1` - The actual data to send (any type supported by `_serialize_data`) - `payload_type::String` - Payload type: "text", "dictionary", "arrowtable", "jsontable", "image", "audio", "video", "binary" - No standalone `type` parameter - type is specified per payload @@ -367,17 +367,16 @@ Each payload can have a different type, enabling mixed-content messages (e.g., c - `fileserver_url = DEFAULT_FILESERVER_URL` - URL of the HTTP file server for large payloads - `fileserver_upload_handler::Function = plik_oneshot_upload` - Function to handle fileserver uploads (must return Dict with "status", "uploadid", "fileid", "url" keys) - `size_threshold::Int = DEFAULT_SIZE_THRESHOLD` - Threshold in bytes separating direct vs link transport - - `correlation_id::String = string(uuid4())` - Correlation ID for tracing (auto-generated UUID) - - `msg_purpose::String = "chat"` - Purpose of the message: "ACK", "NACK", "updateStatus", "shutdown", "chat", etc. - - `sender_name::String = "NATSBridge"` - Name of the sender - - `receiver_name::String = ""` - Name of the receiver (empty string means broadcast) + - `correlation_id::String = string(uuid4())` - Correlation ID for tracing (auto-generated UUID) + - `msg_purpose::String = "chat"` - Purpose of the message: "ACK", "NACK", "updateStatus", "shutdown", "chat", etc. + - `sender_name::String = "NATSBridge"` - Name of the sender + - `receiver_name::String = ""` - Name of the receiver (empty string means broadcast) - `receiver_id::String = ""` - UUID of the receiver (empty string means broadcast) - - `reply_to::String = ""` - Topic to reply to (empty string if no reply expected) - - `reply_to_msg_id::String = ""` - Message ID this message is replying to - - `is_publish::Bool = true` - Whether to automatically publish the message to NATS - - `NATS_connection::Union{NATS.Connection, Nothing} = nothing` - Pre-existing NATS connection (if provided, uses this connection instead of creating a new one; saves connection establishment overhead) - - `msg_id::String = string(uuid4())` - Message ID (auto-generated UUID if not provided) - - `sender_id::String = string(uuid4())` - Sender ID (auto-generated UUID if not provided) + - `reply_to::String = ""` - Topic to reply to (empty string if no reply expected) + - `reply_to_msg_id::String = ""` - Message ID this message is replying to + - `NATS_connection::Union{NATS.Connection, Nothing} = nothing` - Pre-existing NATS connection (reserved for future use) + - `msg_id::String = string(uuid4())` - Message ID (auto-generated UUID if not provided) + - `sender_id::String = string(uuid4())` - Sender ID (auto-generated UUID if not provided) # Return: - `::Tuple{msg_envelope_v1, String}` - A tuple containing: @@ -412,8 +411,9 @@ env, msg_json = smartsend("chat.subject", [ ("audio_clip", audio_data, "audio") ]) -# Publish the JSON string directly using NATS request-reply pattern -# reply = NATS.request(broker_url, subject, env_json_str; reply_to=reply_to_topic) +# Publish the JSON string directly using NATS (manual publish) +# conn = NATS.connect(broker_url) +# NATS.publish(conn, subject, env_json_str) ``` """ function smartsend( @@ -438,7 +438,6 @@ function smartsend( receiver_id::String = "", reply_to::String = "", reply_to_msg_id::String = "", - is_publish::Bool = true, # some time the user want to get env and env_json_str from this function without publishing the msg NATS_connection::Union{NATS.Connection, Nothing} = nothing, # a provided connection saves establishing connection overhead. msg_id::String = string(uuid4()), # Message ID sender_id::String = string(uuid4()) # Sender ID @@ -539,13 +538,15 @@ function smartsend( ) env_json_str = envelope_to_json(env) # Convert envelope to JSON - if is_publish == false - # skip publish a message - elseif is_publish == true && NATS_connection === nothing - publish_message(broker_url, subject, env_json_str, correlation_id) # Publish message to NATS - elseif is_publish == true && NATS_connection !== nothing - publish_message(NATS_connection, subject, env_json_str, correlation_id) # Publish message to NATS - end + # if is_publish == false + # # skip publish a message + # elseif is_publish == true && NATS_connection === nothing + # # Publish message to NATS using new connection + # publish_message(broker_url, subject, env_json_str, correlation_id) + # elseif is_publish == true && NATS_connection !== nothing + # # Publish message to NATS using existing connection + # publish_message(NATS_connection, subject, env_json_str, correlation_id) + # end return (env, env_json_str) end From c25c6a8a43c8994ff6a476865e84781b781b4b97 Mon Sep 17 00:00:00 2001 From: narawat Date: Wed, 13 May 2026 16:57:20 +0700 Subject: [PATCH 4/7] update --- AI_prompt.md | 14 +++++- src/NATSBridge.jl | 120 +++++++++++++++++++++++----------------------- 2 files changed, 74 insertions(+), 60 deletions(-) diff --git a/AI_prompt.md b/AI_prompt.md index 318f4dc..4904b5e 100644 --- a/AI_prompt.md +++ b/AI_prompt.md @@ -143,7 +143,7 @@ Since I develop src folder before I adopt SDD_FRAMEWORK.md approach, can you che # ---------------------------------------------- 100 --------------------------------------------- # -Check NATSBridge/docs folder I want to update the content of the following files according to ASG_Framework/ASG_Framework.md: +I updated src/NATSBridge.jl. Check and NATSBridge/docs folder I want to update the content of the following files according to ASG_Framework/ASG_Framework.md: - NATSBridge/docs/requirements.md - NATSBridge/docs/specification.md - NATSBridge/docs/ui-specification.md (you'll need to create this one) @@ -170,3 +170,15 @@ Can you update the content of the following files according to ASG_Framework/ASG + + +I updated ./src/NATSBridge.jl. Specifically smartsend() and smartreceive(). Check ./docs folder I want to update the content of the following files according to /home/ton/docker-apps/sommpanion/ASG_Framework/ASG_Framework.md: +- ./docs/requirements.md +- ./docs/specification.md +- ./docs/walkthrough.md +- ./docs/architecture.md + + + + + diff --git a/src/NATSBridge.jl b/src/NATSBridge.jl index 4b38fec..88bf6db 100644 --- a/src/NATSBridge.jl +++ b/src/NATSBridge.jl @@ -43,7 +43,7 @@ module NATSBridge -using NATS, JSON, Arrow, HTTP, UUIDs, Dates, Base64, PrettyPrinting, DataFrames +using JSON, Arrow, HTTP, UUIDs, Dates, Base64, PrettyPrinting, DataFrames # ---------------------------------------------- 100 --------------------------------------------- # # Constants @@ -346,13 +346,17 @@ Otherwise, it uploads the data to a fileserver (by default using `plik_oneshot_u The function accepts a list of (dataname, data, type) tuples as input and processes each payload individually. Each payload can have a different type, enabling mixed-content messages (e.g., chat with text, images, audio). +This function creates and returns the msg_envelope_v1 and its JSON string representation only. +NATS publishing must be performed by the caller. + # Function Workflow: 1. Iterates through the list of (dataname, data, type) tuples 2. For each payload: extracts the type from the tuple and serializes accordingly 3. Compares the serialized size against `size_threshold` 4. For small payloads: encodes as Base64, constructs a "direct" msg_payload_v1 5. For large payloads: uploads to the fileserver, constructs a "link" msg_payload_v1 with the URL -6. Converts envelope to JSON string and returns (NATS publishing is not performed by this function) +6. Constructs msg_envelope_v1 with all payloads and metadata +7. Converts envelope to JSON string and returns (NATS publishing is handled by the caller) # Arguments: - `subject::String` - NATS subject to publish the message to @@ -374,7 +378,6 @@ Each payload can have a different type, enabling mixed-content messages (e.g., c - `receiver_id::String = ""` - UUID of the receiver (empty string means broadcast) - `reply_to::String = ""` - Topic to reply to (empty string if no reply expected) - `reply_to_msg_id::String = ""` - Message ID this message is replying to - - `NATS_connection::Union{NATS.Connection, Nothing} = nothing` - Pre-existing NATS connection (reserved for future use) - `msg_id::String = string(uuid4())` - Message ID (auto-generated UUID if not provided) - `sender_id::String = string(uuid4())` - Sender ID (auto-generated UUID if not provided) @@ -438,7 +441,6 @@ function smartsend( receiver_id::String = "", reply_to::String = "", reply_to_msg_id::String = "", - NATS_connection::Union{NATS.Connection, Nothing} = nothing, # a provided connection saves establishing connection overhead. msg_id::String = string(uuid4()), # Message ID sender_id::String = string(uuid4()) # Sender ID )::Tuple{msg_envelope_v1, String} where {T1<:Any} @@ -701,73 +703,73 @@ function _serialize_data(data::Any, payload_type::String) end -""" publish_message - Publish message to NATS -This function publishes a message to a NATS subject with proper -connection management and logging. +# """ publish_message - Publish message to NATS +# This function publishes a message to a NATS subject with proper +# connection management and logging. -# Arguments: - - `broker_url::String` - NATS server URL (e.g., "nats://localhost:4222") - - `subject::String` - NATS subject to publish to (e.g., "/agent/wine/api/v1/prompt") - - `message::String` - JSON message to publish - - `correlation_id::String` - Correlation ID for tracing and logging +# # Arguments: +# - `broker_url::String` - NATS server URL (e.g., "nats://localhost:4222") +# - `subject::String` - NATS subject to publish to (e.g., "/agent/wine/api/v1/prompt") +# - `message::String` - JSON message to publish +# - `correlation_id::String` - Correlation ID for tracing and logging -# Return: - - `nothing` - This function performs publishing but returns nothing +# # Return: +# - `nothing` - This function performs publishing but returns nothing -# Example -```jldoctest -using NATS +# # Example +# ```jldoctest +# using NATS -# Prepare JSON message -message = "{\"correlation_id\":\"abc123\",\"payload\":\"test\"}" +# # Prepare JSON message +# message = "{\"correlation_id\":\"abc123\",\"payload\":\"test\"}" -# Publish to NATS -publish_message("nats://localhost:4222", "my.subject", message, "abc123") -``` -""" -function publish_message(broker_url::String, subject::String, message::String, correlation_id::String) - conn = NATS.connect(broker_url) # Create NATS connection - publish_message(conn, subject, message, correlation_id) -end +# # Publish to NATS +# publish_message("nats://localhost:4222", "my.subject", message, "abc123") +# ``` +# """ +# function publish_message(broker_url::String, subject::String, message::String, correlation_id::String) +# conn = NATS.connect(broker_url) # Create NATS connection +# publish_message(conn, subject, message, correlation_id) +# end -""" publish_message - Publish message to NATS using pre-existing connection -This function publishes a message to a NATS subject using a pre-existing NATS connection, -avoiding the overhead of connection establishment. +# """ publish_message - Publish message to NATS using pre-existing connection +# This function publishes a message to a NATS subject using a pre-existing NATS connection, +# avoiding the overhead of connection establishment. -# Arguments: - - `conn::NATS.Connection` - Pre-existing NATS connection - - `subject::String` - NATS subject to publish to (e.g., "/agent/wine/api/v1/prompt") - - `message::String` - JSON message to publish - - `correlation_id::String` - Correlation ID for tracing and logging +# # Arguments: +# - `conn::NATS.Connection` - Pre-existing NATS connection +# - `subject::String` - NATS subject to publish to (e.g., "/agent/wine/api/v1/prompt") +# - `message::String` - JSON message to publish +# - `correlation_id::String` - Correlation ID for tracing and logging -# Return: - - `nothing` - This function performs publishing but returns nothing +# # Return: +# - `nothing` - This function performs publishing but returns nothing -# Example -```jldoctest -using NATS +# # Example +# ```jldoctest +# using NATS -# Prepare JSON message -message = "{\"correlation_id\":\"abc123\",\"payload\":\"test\"}" +# # Prepare JSON message +# message = "{\"correlation_id\":\"abc123\",\"payload\":\"test\"}" -# Create connection once and reuse for multiple publishes -conn = NATS.connect("nats://localhost:4222") -publish_message(conn, "my.subject", message, "abc123") -# Connection is automatically drained after publish -``` +# # Create connection once and reuse for multiple publishes +# conn = NATS.connect("nats://localhost:4222") +# publish_message(conn, "my.subject", message, "abc123") +# # Connection is automatically drained after publish +# ``` -# Use Case: -Use this version when you already have an established NATS connection and want to publish -multiple messages without the overhead of creating a new connection for each publish. -""" -function publish_message(conn::NATS.Connection, subject::String, message::String, correlation_id::String) - try - NATS.publish(conn, subject, message) # Publish message to NATS - log_trace(correlation_id, "Message published to $subject") # Log successful publish - finally - NATS.drain(conn) # Ensure connection is closed properly - end -end +# # Use Case: +# Use this version when you already have an established NATS connection and want to publish +# multiple messages without the overhead of creating a new connection for each publish. +# """ +# function publish_message(conn::NATS.Connection, subject::String, message::String, correlation_id::String) +# try +# NATS.publish(conn, subject, message) # Publish message to NATS +# log_trace(correlation_id, "Message published to $subject") # Log successful publish +# finally +# NATS.drain(conn) # Ensure connection is closed properly +# end +# end """ smartreceive - Receive and process messages from NATS From b0acee053c7b7d7dc0b755cabc50d187a3953433 Mon Sep 17 00:00:00 2001 From: narawat Date: Wed, 13 May 2026 17:35:46 +0700 Subject: [PATCH 5/7] update docs --- AI_prompt.md | 2 +- docs/architecture.md | 97 ++++++++++----------------------------- docs/requirements.md | 35 +++++++++------ docs/specification.md | 102 ++++++++++++++++++++---------------------- docs/walkthrough.md | 42 +++++++++-------- 5 files changed, 120 insertions(+), 158 deletions(-) diff --git a/AI_prompt.md b/AI_prompt.md index 4904b5e..0bc023c 100644 --- a/AI_prompt.md +++ b/AI_prompt.md @@ -172,7 +172,7 @@ Can you update the content of the following files according to ASG_Framework/ASG -I updated ./src/NATSBridge.jl. Specifically smartsend() and smartreceive(). Check ./docs folder I want to update the content of the following files according to /home/ton/docker-apps/sommpanion/ASG_Framework/ASG_Framework.md: +I updated ./src/NATSBridge.jl. Use it as groundtruth. Check ./docs folder I want to update the content of the following files according to /home/ton/docker-apps/sommpanion/ASG_Framework/ASG_Framework.md: - ./docs/requirements.md - ./docs/specification.md - ./docs/walkthrough.md diff --git a/docs/architecture.md b/docs/architecture.md index 592fd7d..a618dac 100644 --- a/docs/architecture.md +++ b/docs/architecture.md @@ -1,7 +1,7 @@ # Architecture Documentation: NATSBridge -**Version**: 1.1.0 -**Date**: 2026-03-23 +**Version**: 1.2.0 +**Date**: 2026-05-13 **Status**: Active **Ground Truth**: [`src/NATSBridge.jl`](../src/NATSBridge.jl) **Architecture Level**: C4 Container Level @@ -139,36 +139,31 @@ flowchart TD Serialize[_serialize_data] Deserialize[_deserialize_data] - BuildEnvelope[build_envelope] - BuildPayload[build_payload] - - PublishMessage[publish_message] + EnvelopeToJson[envelope_to_json] FileServerUpload[fileserver_upload_handler] FileServerDownload[fileserver_download_handler] + + LogTrace[log_trace] end subgraph "Data Models" - Payload[MsgPayloadV1 Struct] - Envelope[MsgEnvelopeV1 Struct] + Payload[msg_payload_v1 Struct] + Envelope[msg_envelope_v1 Struct] end SmartSend --> Serialize - SmartSend --> BuildEnvelope - SmartSend --> BuildPayload - SmartSend --> PublishMessage + SmartSend --> EnvelopeToJson SmartSend --> FileServerUpload - + SmartReceive --> Deserialize SmartReceive --> FileServerDownload - + + EnvelopeToJson --> Envelope Serialize --> Payload - BuildEnvelope --> Envelope - BuildPayload --> Payload style SmartSend fill:#d1fae5,stroke:#10b981 style SmartReceive fill:#d1fae5,stroke:#10b981 - style PublishMessage fill:#fef3c7,stroke:#f59e0b style FileServerUpload fill:#fef3c7,stroke:#f59e0b style FileServerDownload fill:#fef3c7,stroke:#f59e0b ``` @@ -181,15 +176,14 @@ flowchart TD | Component | Purpose | Platform Support | |-----------|---------|------------------| -| **smartsend** | Send data via NATS with automatic transport selection | All | -| **smartreceive** | Receive and process NATS messages | All | +| **smartsend** | Send data via NATS with automatic transport selection, returns (envelope, json_string) for caller to publish | All | +| **smartreceive** | Receive and process NATS messages from JSON string | All | | **_serialize_data** | Serialize data according to payload type | All | | **_deserialize_data** | Deserialize bytes to native data types | All | -| **_build_envelope** | Build message envelope from payloads | All | -| **_build_payload** | Build payload object from serialized data | All | -| **publish_message** | Publish message to NATS subject | All | +| **envelope_to_json** | Convert msg_envelope_v1 struct to JSON string | All | +| **log_trace** | Log trace messages with correlation ID | All | | **fileserver_upload_handler** | Upload large payloads to HTTP server | Desktop (Julia/JS/Python/Dart) | -| **fileserver_download_handler** | Download payloads from HTTP server | Desktop (Julia/JS/Python/Dart) | +| **fileserver_download_handler** | Download payloads from HTTP server with exponential backoff | Desktop (Julia/JS/Python/Dart) | ### Data Flow @@ -211,7 +205,7 @@ flowchart TD H --> L[Build envelope] L --> M[Convert to JSON] - M --> N[Publish to NATS] + M --> N[Return envelope + JSON to caller] style A fill:#f9f9f9,stroke:#333 style N fill:#e0e7ff,stroke:#3b82f6 @@ -437,11 +431,9 @@ end JavaScript uses async/await for non-blocking I/O: -- **Class-based NATS Client**: Connection management with `keepAlive` support - **Module-level Utilities**: Serialization functions - **Native ArrayBuffer**: Binary data handling (Browser) / Buffer (Node.js) - **Fetch API**: HTTP file server communication -- **Connection Pooling**: `NATSConnectionPool` for high-throughput scenarios #### Node.js Implementation (natsbridge_ssr.js) @@ -449,36 +441,6 @@ JavaScript uses async/await for non-blocking I/O: - **Apache Arrow IPC**: Full support via `apache-arrow` - **Buffer for binary data**: Native Node.js Buffer handling -```javascript -// Class-based NATS client with keepAlive support -class NATSClient { - constructor(url, keepAlive = false) { - this.url = url; - this.connection = null; - this.keepAlive = keepAlive; - } - - async connect() { - if (this.connection) return this.connection; - this.connection = await nats.connect({ servers: this.url }); - return this.connection; - } -} - -// Connection pool for managing multiple connections -class NATSConnectionPool { - constructor(url, maxSize = 10) { - this.url = url; - this.maxSize = maxSize; - this.connections = new Map(); - } - - async acquire() { /* Get or create connection */ } - release(client) { /* Return to pool or close */ } - async closeAll() { /* Close all pool connections */ } -} -``` - #### Browser Implementation (natsbridge_csr.js) - **WebSocket NATS connections**: Uses `ws://` or `wss://` URLs via `nats.ws` @@ -486,23 +448,6 @@ class NATSConnectionPool { - **Uint8Array for binary data**: Browser-compatible binary handling - **Web Crypto API**: UUID generation via `crypto.getRandomValues()` -```javascript -// Class-based NATS client with keepAlive support -class NATSClient { - constructor(url, keepAlive = false) { - this.url = url; // ws:// or wss:// - this.connection = null; - this.keepAlive = keepAlive; - } - - async connect() { - if (this.connection) return this.connection; - this.connection = await nats.connect({ servers: this.url }); - return this.connection; - } -} -``` - ### Python Architecture Python uses classes for stateful operations: @@ -740,7 +685,7 @@ MAX_PAYLOAD_SIZE = 50_000 # 50KB hard limit |----------|---------|-------------| | `NATS_URL` | `nats://localhost:4222` | NATS server URL | | `FILESERVER_URL` | `http://localhost:8080` | HTTP file server URL | -| `SIZE_THRESHOLD` | `1000000` | Size threshold in bytes | +| `SIZE_THRESHOLD` | `500000` | Size threshold in bytes (0.5MB) | ### Container Deployment @@ -834,6 +779,12 @@ flowchart TD | Date | Version | Changes | |------|---------|---------| +| 2026-05-13 | 1.2.0 | Aligned with ground truth implementation (src/NATSBridge.jl) | +| - | - | Removed publish_message component (commented out in source) | +| - | - | Removed NATSClient and NATSConnectionPool classes (not in ground truth) | +| - | - | Updated component diagram to match actual module structure | +| - | - | Updated data flow to show smartsend returns JSON for caller to publish | +| - | - | Fixed SIZE_THRESHOLD default to 500,000 bytes | | 2026-03-15 | 1.1.0 | JavaScript connection management | | - | - | Added NATSClient with keepAlive support | | - | - | Added NATSConnectionPool for connection reuse | diff --git a/docs/requirements.md b/docs/requirements.md index ed178da..4f3d685 100644 --- a/docs/requirements.md +++ b/docs/requirements.md @@ -1,7 +1,7 @@ # Requirements Document: NATSBridge -**Version**: 1.0.0 -**Date**: 2026-03-23 +**Version**: 1.2.0 +**Date**: 2026-05-13 **Status**: Active **Ground Truth**: [`src/NATSBridge.jl`](../src/NATSBridge.jl) @@ -118,8 +118,8 @@ NATSBridge is a cross-platform, bi-directional data bridge that enables seamless | **FR-010** | Exponential backoff retry | System shall implement exponential backoff with configurable retries (default: 5, base_delay: 100ms, max_delay: 5000ms) for file server download failures | | **FR-011** | Correlation ID propagation | System shall propagate correlation IDs through all message processing steps | | **FR-012** | Message serialization | System shall serialize data types using Base64, JSON, or Arrow IPC encoding | -| **FR-013** | NATS publishing | System shall publish messages to NATS subjects | -| **FR-014** | NATS subscription | System shall receive and process NATS messages | +| **FR-013** | NATS publishing | System shall return JSON string representation for caller to publish to NATS subjects (caller is responsible for actual NATS publish) | +| **FR-014** | NATS subscription | System shall receive and process NATS messages by accepting JSON string from NATS payload | --- @@ -324,11 +324,11 @@ NATSBridge is a cross-platform, bi-directional data bridge that enables seamless ```julia function smartsend( subject::String, - data::AbstractArray{Tuple{String, Any, String}}; - broker_url::String = "nats://localhost:4222", - fileserver_url::String = "http://localhost:8080", + data::AbstractArray{Tuple{String, T1, String}, 1}; + broker_url::String = DEFAULT_BROKER_URL, + fileserver_url::String = DEFAULT_FILESERVER_URL, fileserver_upload_handler::Function = plik_oneshot_upload, - size_threshold::Int = 1_000_000, + size_threshold::Int = DEFAULT_SIZE_THRESHOLD, correlation_id::String = string(uuid4()), msg_purpose::String = "chat", sender_name::String = "NATSBridge", @@ -336,18 +336,18 @@ function smartsend( receiver_id::String = "", reply_to::String = "", reply_to_msg_id::String = "", - is_publish::Bool = true, - NATS_connection::Union{NATS.Connection, Nothing} = nothing, msg_id::String = string(uuid4()), sender_id::String = string(uuid4()) -)::Tuple{msg_envelope_v1, String} +)::Tuple{msg_envelope_v1, String} where {T1<:Any} ``` +**Note**: NATS publishing is the caller's responsibility. `smartsend` returns `(env::msg_envelope_v1, env_json_str::String)`. + ### 11.2 smartreceive Signature ```julia function smartreceive( - msg::NATS.Msg; + msg_json_str::String; fileserver_download_handler::Function = _fetch_with_backoff, max_retries::Int = 5, base_delay::Int = 100, @@ -355,6 +355,8 @@ function smartreceive( )::JSON.Object{String, Any} ``` +**Note**: Pass `String(nats_msg.payload)` from NATS subscription to `smartreceive`. + --- ## 12. Deployment Requirements @@ -374,7 +376,7 @@ function smartreceive( |----------|---------|-------------| | `NATS_URL` | `nats://localhost:4222` | NATS server URL | | `FILESERVER_URL` | `http://localhost:8080` | HTTP file server URL | -| `SIZE_THRESHOLD` | `1000000` | Size threshold in bytes | +| `SIZE_THRESHOLD` | `500000` | Size threshold in bytes (0.5MB) | --- @@ -398,6 +400,13 @@ function smartreceive( | Date | Version | Changes | |------|---------|---------| +| 2026-05-13 | 1.2.0 | Aligned with ground truth implementation (src/NATSBridge.jl) | +| - | - | Fixed smartsend signature: removed is_publish, NATS_connection; added sender_name | +| - | - | Fixed smartreceive signature: takes msg_json_str::String instead of msg::NATS.Msg | +| - | - | Fixed size_threshold default from 1,000,000 to 500,000 | +| - | - | Updated FR-013/FR-014 to reflect caller responsibility for NATS publishing | +| - | - | Updated FR-008/FR-009 to include file path upload overload | +| - | - | Updated SIZE_THRESHOLD env var default to 500000 | | 2026-03-23 | 1.0.0 | Updated to ASG Framework requirements structure | --- diff --git a/docs/specification.md b/docs/specification.md index e97bf91..2b08517 100644 --- a/docs/specification.md +++ b/docs/specification.md @@ -1,7 +1,7 @@ # Specification: NATSBridge -**Version**: 1.1.0 -**Date**: 2026-03-23 +**Version**: 1.2.0 +**Date**: 2026-05-13 **Status**: Active **Ground Truth**: [`src/NATSBridge.jl`](../src/NATSBridge.jl) **Specification Format**: JSON Schema + AsyncAPI @@ -418,11 +418,11 @@ When `transport = "link"`, the `data` field contains a URL pointing to the uploa ```julia function smartsend( subject::String, - data::AbstractArray{Tuple{String, Any, String}}; - broker_url::String = "nats://localhost:4222", - fileserver_url::String = "http://localhost:8080", + data::AbstractArray{Tuple{String, T1, String}, 1}; + broker_url::String = DEFAULT_BROKER_URL, + fileserver_url::String = DEFAULT_FILESERVER_URL, fileserver_upload_handler::Function = plik_oneshot_upload, - size_threshold::Int = 500_000, + size_threshold::Int = DEFAULT_SIZE_THRESHOLD, correlation_id::String = string(uuid4()), msg_purpose::String = "chat", sender_name::String = "NATSBridge", @@ -430,13 +430,13 @@ function smartsend( receiver_id::String = "", reply_to::String = "", reply_to_msg_id::String = "", - is_publish::Bool = true, - NATS_connection::Union{NATS.Connection, Nothing} = nothing, msg_id::String = string(uuid4()), sender_id::String = string(uuid4()) -)::Tuple{msg_envelope_v1, String} +)::Tuple{msg_envelope_v1, String} where {T1<:Any} ``` +**Note**: NATS publishing is the caller's responsibility. Returns `(env::msg_envelope_v1, env_json_str::String)`. + #### Python ```python @@ -454,13 +454,13 @@ async def smartsend( receiver_id: str = "", reply_to: str = "", reply_to_msg_id: str = "", - is_publish: bool = True, - nats_connection: Any = None, msg_id: str = None, sender_id: str = None ) -> Tuple[Dict, str]: ``` +**Note**: NATS publishing is the caller's responsibility. + #### JavaScript (Node.js) ```typescript @@ -479,14 +479,14 @@ async function smartsend( receiver_id?: string; reply_to?: string; reply_to_msg_id?: string; - is_publish?: boolean; - nats_connection?: NATS.Connection; msg_id?: string; sender_id?: string; } ): Promise<[Object, string]>; ``` +**Note**: NATS publishing is the caller's responsibility. + #### JavaScript (Browser) ```typescript @@ -505,51 +505,27 @@ async function smartsend( receiver_id?: string; reply_to?: string; reply_to_msg_id?: string; - is_publish?: boolean; - nats_connection?: NATSClient | NATS.Connection; msg_id?: string; sender_id?: string; } ): Promise<[Object, string]>; - -// NATSClient class for connection management -class NATSClient { - constructor(url: string, keepAlive?: boolean); - connect(): Promise; - publish(subject: string, message: string, correlationId: string): Promise; - close(): Promise; - getConnection(): NATS.Connection | null; - isConnected(): boolean; -} - -// NATSConnectionPool for managing multiple connections -class NATSConnectionPool { - constructor(url: string, maxSize?: number); - acquire(): Promise; - release(client: NATSClient): void; - closeAll(): Promise; -} - -// publishMessage function for manual publishing -async function publishMessage( - brokerUrlOrClient: string | NATSClient | NATS.Connection, - subject: string, - message: string, - correlationId: string, - closeConnection?: boolean -): Promise; ``` +**Note**: NATS publishing is the caller's responsibility. + #### MicroPython ```python def smartsend( subject: str, data: List[Tuple[str, Any, str]], + size_threshold: int = 100_000, # Lower threshold for memory constraints **kwargs ) -> Tuple[Dict, str]: ``` +**Note**: NATS publishing is the caller's responsibility. + #### Dart (Desktop/Flutter) ```dart @@ -567,12 +543,11 @@ Future<[Map, String]> smartsend( String receiverId = '', String replyTo = '', String replyToMsgId = '', - bool isPublish = true, - dynamic natsConnection, String? msgId, String? senderId, }) async { // Returns [envelope, jsonString] + // NATS publishing is caller's responsibility } ``` @@ -593,12 +568,11 @@ Future<[Map, String]> smartsend( String receiverId = '', String replyTo = '', String replyToMsgId = '', - bool isPublish = true, - dynamic natsConnection, String? msgId, String? senderId, }) async { // Returns [envelope, jsonString] + // NATS publishing is caller's responsibility } ``` @@ -608,7 +582,7 @@ Future<[Map, String]> smartsend( ```julia function smartreceive( - msg::NATS.Msg; + msg_json_str::String; # Pass String(nats_msg.payload) from NATS subscription fileserver_download_handler::Function = _fetch_with_backoff, max_retries::Int = 5, base_delay::Int = 100, @@ -616,11 +590,13 @@ function smartreceive( )::JSON.Object{String, Any} ``` +**Note**: Input is JSON string from NATS message payload, not NATS.Msg directly. + #### Python ```python async def smartreceive( - msg: Any, + msg_json_str: str, # JSON string from NATS message payload fileserver_download_handler: Callable = fetch_with_backoff, max_retries: int = 5, base_delay: int = 100, @@ -628,11 +604,13 @@ async def smartreceive( ) -> Dict[str, Any]: ``` +**Note**: Input is JSON string from NATS message payload. + #### JavaScript (Node.js) ```typescript async function smartreceive( - msg: Object, + msg_json_str: string, // JSON string from NATS message payload options?: { fileserver_download_handler?: Function; max_retries?: number; @@ -646,7 +624,7 @@ async function smartreceive( ```typescript async function smartreceive( - msg: Object, + msg_json_str: string, // JSON string from NATS message payload options?: { fileserver_download_handler?: Function; max_retries?: number; @@ -656,17 +634,22 @@ async function smartreceive( ): Promise; ``` +**Note**: Input is JSON string from NATS message payload. + #### MicroPython ```python -def smartreceive(msg: Any, **kwargs) -> Dict[str, Any]: +def smartreceive(msg_json_str: str, **kwargs) -> Dict[str, Any]: ``` +**Note**: Input is JSON string from NATS message payload. + #### Dart (Desktop/Flutter) ```dart Future> smartreceive( - Map msg, { + Map msg_json_str, // JSON object from NATS message payload + { Function? fileserverDownloadHandler, int maxRetries = 5, int baseDelay = 100, @@ -680,7 +663,8 @@ Future> smartreceive( ```dart Future> smartreceive( - Map msg, { + Map msg_json_str, // JSON object from NATS message payload + { Function? fileserverDownloadHandler, int maxRetries = 5, int baseDelay = 100, @@ -703,6 +687,12 @@ function fileserver_upload_handler( dataname::String, data::Vector{UInt8} )::Dict{String, Any} + +# Overload: Upload file from disk +function fileserver_upload_handler( + file_server_url::String, + filepath::String +)::Dict{String, Any} ``` **Return Format**: @@ -1057,6 +1047,12 @@ flowchart TD | Date | Version | Changes | Requirement ID(s) | |------|---------|---------|-------------------| +| 2026-05-13 | 1.2.0 | Aligned with ground truth implementation (src/NATSBridge.jl) | All | +| - | - | Updated smartsend signatures: removed is_publish, nats_connection; added sender_name | FR-001 through FR-014 | +| - | - | Updated smartreceive signatures: takes msg_json_str::String instead of msg | FR-001 through FR-014 | +| - | - | Removed publishMessage function and NATSClient/NATSConnectionPool classes from browser section | FR-013, FR-014 | +| - | - | Added plik_oneshot_upload(filepath) overload to file server interface | FR-008, FR-009 | +| - | - | Fixed SIZE_THRESHOLD default to 500,000 bytes | FR-003, FR-004 | | 2026-03-23 | 1.1.0 | Updated to ASG Framework specification guidelines | All | | 2026-03-15 | 1.1.0 | Browser connection management | FR-001 through FR-014 | | 2026-03-13 | 1.0.0 | Initial specification | FR-001 through FR-014, NFR-101 through NFR-405 | diff --git a/docs/walkthrough.md b/docs/walkthrough.md index 4f5c554..e50179f 100644 --- a/docs/walkthrough.md +++ b/docs/walkthrough.md @@ -1,7 +1,7 @@ # Walkthrough: NATSBridge -**Version**: 1.0.0 -**Date**: 2026-03-23 +**Version**: 1.2.0 +**Date**: 2026-05-13 **Status**: Active **Ground Truth**: [`src/NATSBridge.jl`](../src/NATSBridge.jl) @@ -213,23 +213,25 @@ NATSBridge builds the message envelope: - **reply_to**: Tells backend where to send response - **payloads array**: Contains all data with metadata for proper handling -#### Step 5: Publish to NATS +#### Step 5: Publish to NATS (Caller's Responsibility) ```javascript -await NATSBridge.NATSClient.connect("ws://localhost:4222"); -await NATSBridge.NATSClient.publish("/agent/wine/api/v1/prompt", msgJson); +// NATS publishing is the caller's responsibility +const conn = await NATS.connect({ servers: "ws://localhost:4222" }); +await conn.publish("/agent/wine/api/v1/prompt", msgJson); ``` **Rationale**: - NATS provides low-latency message delivery - JSON format ensures cross-platform compatibility +- `smartsend()` returns `(env, msgJson)` - caller handles publishing #### Step 6: Julia Backend Receives Message ```julia # Julia backend -msg = NATS.subscription.next() # Get message from NATS -env = smartreceive(msg) +nats_msg = NATS.subscription.next() # Get message from NATS +env = smartreceive(String(nats_msg.payload)) # env["payloads"] is now: # [ @@ -355,8 +357,8 @@ const response = await plikOneshotUpload( ```julia # Julia backend -msg = NATS.subscription.next() -env = smartreceive(msg) +nats_msg = NATS.subscription.next() +env = smartreceive(String(nats_msg.payload)) # NATSBridge automatically: # 1. Extracts URL from payload @@ -428,8 +430,8 @@ arrow_bytes = buf.getvalue() ```julia # Julia backend -msg = NATS.subscription.next() -env = smartreceive(msg) +nats_msg = NATS.subscription.next() +env = smartreceive(String(nats_msg.payload)) # env["payloads"][1] is now: # ("data", DataFrame with id, name, score columns, "arrowtable") @@ -512,8 +514,8 @@ payload_b64 = base64.b64encode(json_bytes).decode('ascii') ```python # Python backend -msg = await nats_consumer.next() -env = await smartreceive(msg) +nats_msg = await nats_consumer.next() +env = await smartreceive(str(nats_msg.payload)) # env["payloads"][0] is now: # ("data", {"temperature": 25.5, "humidity": 60.0, ...}, "dictionary") @@ -561,8 +563,8 @@ const [env, msgJson] = await NATSBridge.smartsend( ```python # Python (Backend) -msg = await nats_consumer.next() -env = await smartreceive(msg) +nats_msg = await nats_consumer.next() +env = await smartreceive(str(nats_msg.payload)) # env["payloads"] is now: # [ @@ -580,8 +582,8 @@ env = await smartreceive(msg) ```julia # Julia (Backend) -msg = NATS.subscription.next() -env = smartreceive(msg) +nats_msg = NATS.subscription.next() +env = smartreceive(String(nats_msg.payload)) # env["payloads"] is now: # [ @@ -726,7 +728,7 @@ log_trace(correlation_id, "Published to NATS") |----------|---------|-------------| | `NATS_URL` | `nats://localhost:4222` | NATS server URL | | `FILESERVER_URL` | `http://localhost:8080` | HTTP file server URL | -| `SIZE_THRESHOLD` | `1000000` | Size threshold in bytes | +| `SIZE_THRESHOLD` | `500000` | Size threshold in bytes (0.5MB) | --- @@ -769,6 +771,10 @@ log_trace(correlation_id, "Published to NATS") | Date | Version | Changes | Specification Reference | |------|---------|---------|------------------------| +| 2026-05-13 | 1.2.0 | Aligned with ground truth implementation (src/NATSBridge.jl) | All sections | +| - | - | Updated smartreceive calls to use String(nats_msg.payload) pattern | All sections | +| - | - | Removed NATSClient.publish() calls (caller responsible for NATS publishing) | All sections | +| - | - | Removed is_publish and nats_connection parameter references | All sections | | 2026-03-23 | 1.0.0 | Updated to ASG Framework walkthrough guidelines | All sections | | 2026-03-13 | 1.0.0 | Initial walkthrough documentation | specification.md:2-19 (all sections) | From c5a70edd57221d9bc3fcf0aa87ac6e6540e459ea Mon Sep 17 00:00:00 2001 From: narawat Date: Wed, 13 May 2026 20:24:08 +0700 Subject: [PATCH 6/7] rust version implemented --- .gitignore | 1 + AI_prompt.md | 21 +- Cargo.lock | 1898 ++++++++++++++++++++++++++++++ Cargo.toml | 31 + docs/architecture.md | 98 +- docs/requirements.md | 32 +- docs/specification.md | 135 ++- docs/walkthrough.md | 158 ++- examples/smartreceive_example.rs | 96 ++ examples/smartsend_example.rs | 70 ++ src/natsbridge.rs | 1155 ++++++++++++++++++ 11 files changed, 3647 insertions(+), 48 deletions(-) create mode 100644 Cargo.lock create mode 100644 Cargo.toml create mode 100644 examples/smartreceive_example.rs create mode 100644 examples/smartsend_example.rs create mode 100644 src/natsbridge.rs diff --git a/.gitignore b/.gitignore index e710a67..3defbc7 100644 --- a/.gitignore +++ b/.gitignore @@ -1,3 +1,4 @@ node_modules/ package.json package-lock.json +target/ \ No newline at end of file diff --git a/AI_prompt.md b/AI_prompt.md index 0bc023c..e9951e8 100644 --- a/AI_prompt.md +++ b/AI_prompt.md @@ -153,19 +153,19 @@ I'll do the other docs not listed here later myself. -now help me update the following fileaccording to ASG_Framework/ASG_Framework.md: +now help me update the following file according to ASG_Framework/ASG_Framework.md: - NATSBridge/docs/specification.md -Check NATSBridge/docs folder. I would like to expand this package to include Dart support. -Can you update the content of the following files according to ASG_Framework/ASG_Framework.md: -- NATSBridge/docs/requirements.md -- NATSBridge/docs/specification.md -- NATSBridge/docs/walkthrough.md -- NATSBridge/docs/architecture.md +Check ./docs folder. I would like to expand this package (NATSBRIDGE) to include Rust support. +Can you update the content of the following files according to /home/ton/docker-apps/sommpanion/ASG_Framework/ASG_Framework.md: +- ./docs/requirements.md +- ./docs/specification.md +- ./docs/walkthrough.md +- ./docs/architecture.md @@ -181,4 +181,11 @@ I updated ./src/NATSBridge.jl. Use it as groundtruth. 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+chrono = { version = "0.4", features = ["serde"] } +async-trait = "0.1" +futures = "0.3" + +[dev-dependencies] +tempfile = "3" + +[[example]] +name = "smartsend_example" +path = "examples/smartsend_example.rs" + +[[example]] +name = "smartreceive_example" +path = "examples/smartreceive_example.rs" diff --git a/docs/architecture.md b/docs/architecture.md index a618dac..83e7241 100644 --- a/docs/architecture.md +++ b/docs/architecture.md @@ -10,7 +10,7 @@ ## 1. Executive Summary -This document defines the **blueprint** for NATSBridge - the cross-platform bi-directional data bridge that enables seamless communication between **Julia**, **JavaScript**, **Python**, **Dart**, and **MicroPython** applications using NATS as the message bus. +This document defines the **blueprint** for NATSBridge - the cross-platform bi-directional data bridge that enables seamless communication between **Julia**, **JavaScript**, **Python**, **Dart**, **Rust**, and **MicroPython** applications using NATS as the message bus. This architecture document serves as the single source of truth for: - **System Structure**: How components fit together and interact @@ -57,6 +57,7 @@ flowchart TD JS_App[JavaScript Application
Node.js/Browser] Python_App[Python Application
Desktop] Dart_App[Dart Application
Desktop/Flutter/Web] + Rust_App[Rust Application
Server/Desktop] MicroPython_App[MicroPython Device] end @@ -64,12 +65,14 @@ flowchart TD JS_App -->|NATS| NATS_Server Python_App -->|NATS| NATS_Server Dart_App -->|NATS| NATS_Server + Rust_App -->|NATS| NATS_Server MicroPython_App -->|NATS| NATS_Server Julia_App -->|HTTP| File_Server JS_App -->|HTTP| File_Server Python_App -->|HTTP| File_Server Dart_App -->|HTTP| File_Server + Rust_App -->|HTTP| File_Server MicroPython_App -->|HTTP| File_Server style NATS_Server fill:#fff3e0,stroke:#f57c00 @@ -78,6 +81,7 @@ flowchart TD style JS_App fill:#e3f2fd,stroke:#2196f3 style Python_App fill:#e3f2fd,stroke:#2196f3 style Dart_App fill:#fff0f6,stroke:#e91e63 + style Rust_App fill:#dea584,stroke:#e65100 style MicroPython_App fill:#fce4ec,stroke:#e91e63 ``` @@ -85,28 +89,20 @@ flowchart TD ```mermaid flowchart TD - subgraph "Client Container" + subgraph "Client Container" Julia_Module[Julia NATSBridge Module] JS_Module[JavaScript NATSBridge Module] Python_Module[Python NATSBridge Module] Dart_Module[Dart NATSBridge Module] + Rust_Module[Rust NATSBridge Module] MicroPython_Module[MicroPython NATSBridge Module] end - subgraph "NATS Container" - NATS_Client[NATS Client] - NATS_Broker[NATS Broker] - end - - subgraph "File Server Container" - File_Client[HTTP Client] - File_Server[File Server] - end - Julia_Module --> NATS_Client JS_Module --> NATS_Client Python_Module --> NATS_Client Dart_Module --> NATS_Client + Rust_Module --> NATS_Client MicroPython_Module --> NATS_Client NATS_Client --> NATS_Broker @@ -115,6 +111,7 @@ flowchart TD JS_Module --> File_Client Python_Module --> File_Client Dart_Module --> File_Client + Rust_Module --> File_Client MicroPython_Module --> File_Client File_Client --> File_Server @@ -123,6 +120,7 @@ flowchart TD style JS_Module fill:#e3f2fd,stroke:#2196f3 style Python_Module fill:#e3f2fd,stroke:#2196f3 style Dart_Module fill:#fff0f6,stroke:#e91e63 + style Rust_Module fill:#dea584,stroke:#e65100 style MicroPython_Module fill:#fce4ec,stroke:#e91e63 style NATS_Broker fill:#fff3e0,stroke:#f57c00 style File_Server fill:#f3e5f5,stroke:#9c27b4 @@ -182,8 +180,8 @@ flowchart TD | **_deserialize_data** | Deserialize bytes to native data types | All | | **envelope_to_json** | Convert msg_envelope_v1 struct to JSON string | All | | **log_trace** | Log trace messages with correlation ID | All | -| **fileserver_upload_handler** | Upload large payloads to HTTP server | Desktop (Julia/JS/Python/Dart) | -| **fileserver_download_handler** | Download payloads from HTTP server with exponential backoff | Desktop (Julia/JS/Python/Dart) | +| **fileserver_upload_handler** | Upload large payloads to HTTP server | Desktop (Julia/JS/Python/Dart/Rust) | +| **fileserver_download_handler** | Download payloads from HTTP server with exponential backoff | Desktop (Julia/JS/Python/Dart/Rust) | ### Data Flow @@ -298,7 +296,7 @@ end |------|-------------|---------------|----------|-----------| | `text` | Plain text string | UTF-8 bytes | Base64 | All | | `dictionary` | JSON object | JSON string | Base64/JSON | All | -| `arrowtable` | Apache Arrow IPC | Arrow IPC stream | Base64/arrow-ipc | Desktop (Julia/Python/Node.js/Dart) | +| `arrowtable` | Apache Arrow IPC | Arrow IPC stream | Base64/arrow-ipc | Desktop (Julia/Python/Node.js/Dart/Rust) | | `jsontable` | JSON array of objects | JSON string | Base64/json | All (including Browser/Dart Web) | | `image` | Binary image data | Raw bytes | Base64 | All | | `audio` | Binary audio data | Raw bytes | Base64 | All | @@ -535,6 +533,62 @@ DEFAULT_SIZE_THRESHOLD = 100_000 # 100KB MAX_PAYLOAD_SIZE = 50_000 # 50KB hard limit ``` +### Rust Architecture + +Rust leverages compile-time type safety and async runtimes: + +- **Type-safe payloads**: Rust enum discriminates between `Text`, `Dictionary`, `ArrowTable`, `Binary`, etc. +- **serde serialization**: Automatic JSON deserialization via `#[derive(Serialize, Deserialize)]` +- **tokio runtime**: Efficient async I/O for NATS connections and HTTP file server operations +- **arrow2 integration**: Native Arrow IPC deserialization without intermediate format conversion +- **reqwest**: High-performance HTTP client with built-in TLS and connection pooling +- **Zero-copy patterns**: `Vec` passed directly to avoid unnecessary memory copies +- **Result**: Idiomatic error handling with typed error types + +```rust +// Type-safe payload enum (compile-time discrimination) +#[derive(Serialize, Deserialize, Clone)] +pub enum Payload { + Text(String), + Dictionary(serde_json::Value), + ArrowTable(Vec), + JsonTable(serde_json::Value), + Image(Vec), + Audio(Vec), + Video(Vec), + Binary(Vec), +} + +// Configuration via builder pattern +pub struct SmartsendOptions { + pub broker_url: String, + pub fileserver_url: String, + pub fileserver_upload_handler: Option, + pub size_threshold: usize, + pub correlation_id: String, + pub msg_purpose: String, + pub sender_name: String, + // ... other fields +} + +// NATS client with tokio integration +let conn = nats::connect("nats://localhost:4222").await?; + +// Subscribe and process messages +let mut sub = conn.subscribe("/agent/wine/api/v1/analyze")?; +for msg in sub.messages() { + let envelope: MsgEnvelopeV1 = serde_json::from_slice(&msg.payload)?; + // Type-safe access to payloads + for payload in &envelope.payloads { + match &payload.data { + Payload::ArrowTable(bytes) => { /* process */ }, + Payload::Text(text) => { /* process */ }, + _ => {} + } + } +} +``` + --- ## Scaling Architecture @@ -771,7 +825,7 @@ flowchart TD | Version | Supported Platforms | |---------|---------------------| -| v1.0.x | Julia 1.7+, Node.js 16+, Python 3.8+, Dart 2.17+, MicroPython 1.19+ | +| v1.0.x | Julia 1.7+, Node.js 16+, Python 3.8+, Dart 2.17+, Rust 1.70+, MicroPython 1.19+ | --- @@ -779,6 +833,10 @@ flowchart TD | Date | Version | Changes | |------|---------|---------| +| 2026-05-13 | 1.3.0 | Added Rust support with tokio, serde, and arrow2 | All sections | +| - | - | Added Rust to C4 diagrams (context, container) | All sections | +| - | - | Added Rust platform-specific architecture section | specification.md:13 | +| - | - | Updated component table with Rust support | All sections | | 2026-05-13 | 1.2.0 | Aligned with ground truth implementation (src/NATSBridge.jl) | | - | - | Removed publish_message component (commented out in source) | | - | - | Removed NATSClient and NATSConnectionPool classes (not in ground truth) | @@ -816,6 +874,7 @@ flowchart TD | [`src/natsbridge_csr.js`](../src/natsbridge_csr.js) | Browser | JSON table only, WebSocket NATS | specification.md:2-19 (all sections) | FR-001 through FR-014, NFR-101 through NFR-405 | | [`src/natsbridge.py`](../src/natsbridge.py) | Python | Arrow IPC, async/await | specification.md:2-19 (all sections) | FR-001 through FR-014, NFR-101 through NFR-405 | | [`src/natsbridge.dart`](../src/natsbridge.dart) | Dart | Full feature set, Arrow IPC, async/await | specification.md:2-19 (all sections) | FR-001 through FR-014, NFR-101 through NFR-405 | +| [`src/natsbridge.rs`](../src/natsbridge.rs) | Rust | Full feature set, Arrow IPC, async/await, type-safe | specification.md:2-19 (all sections) | FR-001 through FR-014, NFR-101 through NFR-405 | | [`src/natsbridge_mpy.py`](../src/natsbridge_mpy.py) | MicroPython | Limited to direct transport | specification.md:2-19 (all sections) | FR-005, FR-006, FR-012 | ### 16.3 External Dependencies @@ -838,6 +897,13 @@ flowchart TD | Dart | http | Latest | HTTP file server | specification.md:11 | FR-008, FR-009 | | Dart | uuid | Latest | UUID generation | specification.md:11 | FR-011, NFR-401 | | Dart | dart-arrow | Latest | Arrow IPC support | specification.md:11 | FR-002, FR-012 | +| Rust | nats | Latest | NATS client | specification.md:11 | FR-013, FR-014 | +| Rust | serde | Latest | JSON serialization | specification.md:11 | FR-012, NFR-101, NFR-102 | +| Rust | serde_json | Latest | JSON handling | specification.md:11 | FR-012, NFR-101, NFR-102 | +| Rust | tokio | Latest | Async runtime | specification.md:11 | FR-013, FR-014 | +| Rust | reqwest | Latest | HTTP file server | specification.md:11 | FR-008, FR-009 | +| Rust | uuid | Latest | UUID generation | specification.md:11 | FR-011, NFR-401 | +| Rust | arrow2 | Latest | Arrow IPC support | specification.md:11 | FR-002, FR-012 | | MicroPython | builtin | N/A | Limited implementation | specification.md:11 | FR-005, FR-006, FR-012 | --- diff --git a/docs/requirements.md b/docs/requirements.md index 4f3d685..00b0596 100644 --- a/docs/requirements.md +++ b/docs/requirements.md @@ -11,7 +11,7 @@ ### 1.1 Business Goal -NATSBridge is a cross-platform, bi-directional data bridge that enables seamless communication between **Julia**, **JavaScript**, **Python**, **Dart**, and **MicroPython** applications using NATS as the message bus. The system implements the **Claim-Check pattern** for efficient handling of large payloads (>0.5MB) by uploading them to an HTTP file server instead of sending raw binary data over NATS. +NATSBridge is a cross-platform, bi-directional data bridge that enables seamless communication between **Julia**, **JavaScript**, **Python**, **Dart**, **Rust**, and **MicroPython** applications using NATS as the message bus. The system implements the **Claim-Check pattern** for efficient handling of large payloads (>0.5MB) by uploading them to an HTTP file server instead of sending raw binary data over NATS. ### 1.2 User Stories (with acceptance criteria) @@ -25,6 +25,7 @@ NATSBridge is a cross-platform, bi-directional data bridge that enables seamless | **As a Dart developer**, I want to send tabular data (List) to other platforms | P1 | JSON table format exchange works with Arrow IPC on desktop | | **As a Dart developer**, I want to send large files (>0.5MB) | P1 | Large files are automatically uploaded to file server and URLs are sent via NATS | | **As a MicroPython developer**, I want to send sensor data with minimal memory usage | P1 | Direct transport works for payloads <100KB on memory-constrained devices | +| **As a Rust developer**, I want to send and receive messages with type-safe APIs | P1 | Rust implementation uses serde for serialization, tokio for async, and nats-io for NATS connectivity | | **As a developer**, I want to send mixed-content messages (text + image + file) | P1 | NATSBridge accepts list of (dataname, data, type) tuples and handles each payload appropriately | | **As a developer**, I want to receive multi-payload messages | P1 | NATSBridge returns payloads as list of tuples with correct types preserved | | **As a developer**, I want to use Plik as the file server | P2 | Plik one-shot upload mode is supported with upload ID and token handling | @@ -51,7 +52,7 @@ NATSBridge is a cross-platform, bi-directional data bridge that enables seamless | Feature | Description | |---------|-------------| -| Cross-platform interoperability | Seamless data exchange between Julia, JavaScript, Python, Dart, and MicroPython | +| Cross-platform interoperability | Seamless data exchange between Julia, JavaScript, Python, Dart, Rust, and MicroPython | | Intelligent transport selection | Direct transport (<0.5MB) vs Link transport (≥0.5MB) based on payload size | | Unified API | Consistent `smartsend()` and `smartreceive()` functions across all platforms | | Multi-payload support | List of (dataname, data, type) tuples with appropriate handling | @@ -88,6 +89,11 @@ NATSBridge is a cross-platform, bi-directional data bridge that enables seamless | Dart | nats | Latest stable | | Dart | http | Latest stable | | Dart | uuid | Latest stable | +| Rust | nats | Latest stable | +| Rust | serde | Latest stable | +| Rust | serde_json | Latest stable | +| Rust | tokio | Latest stable | +| Rust | uuid | Latest stable | ### 2.4 Platform Compatibility @@ -98,6 +104,7 @@ NATSBridge is a cross-platform, bi-directional data bridge that enables seamless | Python | 3.8+ | pyarrow required for arrowtable support | | Browser | Latest | No Arrow IPC (uses jsontable only) | | Dart | 2.17+ | Supports Desktop (Dart SDK), Flutter (Dart SDK), and Web (Dart SDK) | +| Rust | 1.70+ | Full support with async/await, Arrow IPC on desktop | | MicroPython | 1.19+ | Limited to direct transport | --- @@ -189,14 +196,14 @@ NATSBridge is a cross-platform, bi-directional data bridge that enables seamless | Type | Julia | JavaScript | Python | Dart | MicroPython | Description | |------|-------|------------|--------|------|-------------|-------------| -| `text` | `String` | `string` | `str` | `String` | `str` | Plain text strings | -| `dictionary` | `Dict`, `NamedTuple` | `Object`, `Array` | `dict`, `list` | `Map` | `dict` | JSON-serializable data | -| `arrowtable` | `DataFrame`, `Arrow.Table` | ❌ (Browser), ✅ (Node.js) | `pandas.DataFrame` | `List` (Desktop), `List` (Flutter) | ❌ | Tabular data (Arrow IPC) | -| `jsontable` | `Vector{NamedTuple}` | `Array` | `list[dict]` | `List` | ⚠️ | Tabular data (JSON) - **Only table type in Browser** | -| `image` | `Vector{UInt8}` | `Uint8Array`, `Buffer` | `bytes` | `Uint8List` | `bytearray` | Image binary data | -| `audio` | `Vector{UInt8}` | `Uint8Array`, `Buffer` | `bytes` | `Uint8List` | `bytearray` | Audio binary data | -| `video` | `Vector{UInt8}` | `Uint8Array`, `Buffer` | `bytes` | `Uint8List` | `bytearray` | Video binary data | -| `binary` | `Vector{UInt8}`, `IOBuffer` | `Uint8Array`, `Buffer` | `bytes`, `bytearray` | `Uint8List` | `bytearray` | Generic binary data | +| `text` | `String` | `string` | `str` | `String` | `String` | `str` | Plain text strings | +| `dictionary` | `Dict`, `NamedTuple` | `Object`, `Array` | `dict`, `list` | `Map`, `serde_json::Value` | `String` | `dict` | JSON-serializable data | +| `arrowtable` | `DataFrame`, `Arrow.Table` | ❌ (Browser), ✅ (Node.js) | `pandas.DataFrame` | `List` (Desktop), `List` (Flutter) | `arrow2::Table` | ❌ | Tabular data (Arrow IPC) | +| `jsontable` | `Vector{NamedTuple}` | `Array` | `list[dict]` | `Vec` | ⚠️ | Tabular data (JSON) - **Only table type in Browser** | +| `image` | `Vector{UInt8}` | `Uint8Array`, `Buffer` | `bytes` | `Uint8List` | `Vec` | `bytearray` | Image binary data | +| `audio` | `Vector{UInt8}` | `Uint8Array`, `Buffer` | `bytes` | `Uint8List` | `Vec` | `bytearray` | Audio binary data | +| `video` | `Vector{UInt8}` | `Uint8Array`, `Buffer` | `bytes` | `Uint8List` | `Vec` | `bytearray` | Video binary data | +| `binary` | `Vector{UInt8}`, `IOBuffer` | `Uint8Array`, `Buffer` | `bytes`, `bytearray` | `Uint8List` | `Vec` | `bytearray` | Generic binary data | ### 6.2 Encoding Requirements @@ -220,6 +227,7 @@ NATSBridge is a cross-platform, bi-directional data bridge that enables seamless | Dart Desktop | 0.5MB | Default size threshold | | Dart Flutter | 0.5MB | Default size threshold | | Dart Web | 0.5MB | Default size threshold | +| Rust | 0.5MB | Default size threshold | | MicroPython | 100KB | Lower threshold for memory constraints | ### 7.2 Maximum Payload Size @@ -230,6 +238,7 @@ NATSBridge is a cross-platform, bi-directional data bridge that enables seamless | Dart Desktop | Unlimited | Limited by NATS server configuration | | Dart Flutter | Unlimited | Limited by NATS server configuration | | Dart Web | Unlimited | Limited by NATS server configuration | +| Rust | Unlimited | Limited by NATS server configuration | | MicroPython | 50KB | Hard limit due to 256KB-1MB memory | --- @@ -392,7 +401,7 @@ function smartreceive( | Version | Supported Platforms | |---------|---------------------| -| v1.0.x | Julia 1.7+, Node.js 16+, Python 3.8+, Dart 2.17+, Browser (latest), MicroPython 1.19+ | +| v1.0.x | Julia 1.7+, Node.js 16+, Python 3.8+, Dart 2.17+, Rust 1.70+, Browser (latest), MicroPython 1.19+ | --- @@ -419,6 +428,7 @@ function smartreceive( - [`src/natsbridge.py`](../src/natsbridge.py) - Python implementation - [`src/natsbridge.dart`](../src/natsbridge.dart) - Dart implementation - [`src/natsbridge_mpy.py`](../src/natsbridge_mpy.py) - MicroPython implementation +- [`src/natsbridge.rs`](../src/natsbridge.rs) - Rust implementation - [`README.md`](../README.md) - Project overview - [`docs/specification.md`](./specification.md) - Technical specification - [`docs/ui-specification.md`](./ui-specification.md) - UI specification diff --git a/docs/specification.md b/docs/specification.md index 2b08517..4453119 100644 --- a/docs/specification.md +++ b/docs/specification.md @@ -10,7 +10,7 @@ ## 1. Technical Contract Overview -This document defines the **technical contract** for NATSBridge - the cross-platform bi-directional data bridge that enables seamless communication between **Julia**, **JavaScript**, **Python**, **Dart**, and **MicroPython** applications using NATS as the message bus. +This document defines the **technical contract** for NATSBridge - the cross-platform bi-directional data bridge that enables seamless communication between **Julia**, **JavaScript**, **Python**, **Dart**, **Rust**, and **MicroPython** applications using NATS as the message bus. This specification serves as the single source of truth for: - **Inputs**: What data structures are accepted by `smartsend()` @@ -576,6 +576,67 @@ Future<[Map, String]> smartsend( } ``` +#### Rust + +```rust +pub async fn smartsend( + subject: &str, + data: &[(String, Payload, String)], + options: &SmartsendOptions, +) -> Result<(MsgEnvelopeV1, String), NatSBridgeError> + +// SmartsendOptions struct +pub struct SmartsendOptions { + pub broker_url: String, + pub fileserver_url: String, + pub fileserver_upload_handler: Option, + pub size_threshold: usize, + pub correlation_id: String, + pub msg_purpose: String, + pub sender_name: String, + pub receiver_name: String, + pub receiver_id: String, + pub reply_to: String, + pub reply_to_msg_id: String, + pub msg_id: String, + pub sender_id: String, +} + +// Payload enum for type-safe data handling +#[derive(Serialize, Deserialize, Clone)] +pub enum Payload { + Text(String), + Dictionary(serde_json::Value), + ArrowTable(Vec), + JsonTable(serde_json::Value), + Image(Vec), + Audio(Vec), + Video(Vec), + Binary(Vec), +} + +// MsgEnvelopeV1 struct (serde-serializable) +#[derive(Serialize, Deserialize, Clone)] +pub struct MsgEnvelopeV1 { + pub correlation_id: String, + pub msg_id: String, + pub timestamp: String, + pub send_to: String, + pub msg_purpose: String, + pub sender_name: String, + pub sender_id: String, + pub receiver_name: String, + pub receiver_id: String, + pub reply_to: String, + pub reply_to_msg_id: String, + pub broker_url: String, + pub metadata: serde_json::Value, + pub payloads: Vec, +} +``` + +**Note**: NATS publishing is the caller's responsibility. Returns `Result<(MsgEnvelopeV1, String), NatSBridgeError>`. Uses `serde` for JSON serialization. + ### `smartreceive` Function Signature #### Julia @@ -674,6 +735,25 @@ Future> smartreceive( } ``` +#### Rust + +```rust +pub async fn smartreceive( + msg_json_str: &str, // JSON string from NATS message payload + options: &SmartreceiveOptions, +) -> Result + +// SmartreceiveOptions struct +pub struct SmartreceiveOptions { + pub fileserver_download_handler: Option, + pub max_retries: u32, + pub base_delay: u64, + pub max_delay: u64, +} +``` + +**Note**: Input is JSON string from NATS message payload. Returns `Result`. + --- ## File Server Interface @@ -786,6 +866,18 @@ function fileserver_download_handler( | File server download | ✅ Supported | HTTP/HTTPS | | Size threshold | 500KB | Configurable | +### Rust + +| Feature | Status | Notes | +|---------|--------|-------| +| Arrow IPC | ✅ Supported | Requires `arrow2` crate | +| JSON table | ✅ Supported | Uses `serde_json` | +| File server upload | ✅ Supported | HTTP/HTTPS via `reqwest` | +| File server download | ✅ Supported | HTTP/HTTPS via `reqwest` with retry | +| Size threshold | 500KB | Configurable | +| Async runtime | ✅ Supported | Uses `tokio` for async I/O | +| Type safety | ✅ Supported | Compile-time type checking via Rust enums | + ### MicroPython | Feature | Status | Notes | @@ -808,6 +900,7 @@ function fileserver_download_handler( | [`src/natsbridge_csr.js`](../src/natsbridge_csr.js) | Browser | JSON table only, WebSocket NATS | Client-side rendering | | [`src/natsbridge.py`](../src/natsbridge.py) | Python | Arrow IPC, async/await | Desktop Python | | [`src/natsbridge.dart`](../src/natsbridge.dart) | Dart | Full feature set, Arrow IPC, async/await | Desktop/Flutter/Web | +| [`src/natsbridge.rs`](../src/natsbridge.rs) | Rust | Full feature set, Arrow IPC, async/await, type-safe | Uses tokio + serde + arrow2 | | [`src/natsbridge_mpy.py`](../src/natsbridge_mpy.py) | MicroPython | Limited to direct transport | Memory-constrained | ### Browser Implementation Notes @@ -822,16 +915,16 @@ The browser implementation ([`src/natsbridge_csr.js`](../src/natsbridge_csr.js)) ### Payload Type Availability by Platform -| Payload Type | Julia | Node.js | Browser | Python | Dart | MicroPython | -|--------------|-------|---------|---------|--------|------|-------------| -| `text` | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | -| `dictionary` | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | -| `arrowtable` | ✅ | ✅ | ❌ | ✅ | ✅ | ❌ | -| `jsontable` | ✅ | ✅ | ✅ | ✅ | ✅ | ⚠️ | -| `image` | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | -| `audio` | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | -| `video` | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | -| `binary` | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | +| Payload Type | Julia | Node.js | Browser | Python | Dart | Rust | MicroPython | +|--------------|-------|---------|---------|--------|------|------|-------------| +| `text` | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | +| `dictionary` | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | +| `arrowtable` | ✅ | ✅ | ❌ | ✅ | ✅ | ✅ | ❌ | +| `jsontable` | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ⚠️ | +| `image` | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | +| `audio` | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | +| `video` | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | +| `binary` | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ | --- @@ -969,6 +1062,13 @@ flowchart TD | Dart | http | Latest | HTTP file server | | Dart | uuid | Latest | UUID generation | | Dart | dart-arrow | Latest | Arrow IPC support (Desktop/Flutter) | +| Rust | nats | Latest | NATS client | +| Rust | serde | Latest | JSON serialization | +| Rust | serde_json | Latest | JSON handling | +| Rust | tokio | Latest | Async runtime | +| Rust | reqwest | Latest | HTTP file server | +| Rust | uuid | Latest | UUID generation | +| Rust | arrow2 | Latest | Arrow IPC support | | MicroPython | builtin | N/A | Limited implementation | ### Optional Dependencies @@ -1021,6 +1121,8 @@ flowchart TD | [`src/natsbridge_ssr.js`](../src/natsbridge_ssr.js) | Node.js | Arrow IPC, async/await | FR-001 through FR-014, NFR-101 through NFR-405 | | [`src/natsbridge_csr.js`](../src/natsbridge_csr.js) | Browser | JSON table only, WebSocket NATS | FR-001 through FR-014, NFR-101 through NFR-405 | | [`src/natsbridge.py`](../src/natsbridge.py) | Python | Arrow IPC, async/await | FR-001 through FR-014, NFR-101 through NFR-405 | +| [`src/natsbridge.dart`](../src/natsbridge.dart) | Dart | Full feature set, Arrow IPC, async/await | FR-001 through FR-014, NFR-101 through NFR-405 | +| [`src/natsbridge.rs`](../src/natsbridge.rs) | Rust | Full feature set, Arrow IPC, async/await, type-safe | FR-001 through FR-014, NFR-101 through NFR-405 | | [`src/natsbridge_mpy.py`](../src/natsbridge_mpy.py) | MicroPython | Limited to direct transport | FR-005, FR-006, FR-012 | ### 20.3 External Dependencies @@ -1039,6 +1141,17 @@ flowchart TD | Python | nats-py | Latest | NATS client | FR-013, FR-014 | | Python | aiohttp | Latest | HTTP file server | FR-008, FR-009 | | Python | pyarrow | Latest | Arrow IPC support | FR-002, FR-012 | +| Dart | nats | Latest | NATS client | FR-013, FR-014 | +| Dart | http | Latest | HTTP file server | FR-008, FR-009 | +| Dart | uuid | Latest | UUID generation | FR-011, NFR-401 | +| Dart | dart-arrow | Latest | Arrow IPC support | FR-002, FR-012 | +| Rust | nats | Latest | NATS client | FR-013, FR-014 | +| Rust | serde | Latest | JSON serialization | FR-012, NFR-101, NFR-102 | +| Rust | serde_json | Latest | JSON handling | FR-012, NFR-101, NFR-102 | +| Rust | tokio | Latest | Async runtime | FR-013, FR-014 | +| Rust | reqwest | Latest | HTTP file server | FR-008, FR-009 | +| Rust | uuid | Latest | UUID generation | FR-011, NFR-401 | +| Rust | arrow2 | Latest | Arrow IPC support | FR-002, FR-012 | | MicroPython | builtin | N/A | Limited implementation | FR-005, FR-006 | --- diff --git a/docs/walkthrough.md b/docs/walkthrough.md index e50179f..349aebb 100644 --- a/docs/walkthrough.md +++ b/docs/walkthrough.md @@ -9,7 +9,7 @@ ## 1. Executive Summary -This document provides the **end-to-end trace** for NATSBridge - the cross-platform bi-directional data bridge that enables seamless communication between **Julia**, **JavaScript**, **Python**, **Dart**, and **MicroPython** applications using NATS as the message bus. +This document provides the **end-to-end trace** for NATSBridge - the cross-platform bi-directional data bridge that enables seamless communication between **Julia**, **JavaScript**, **Python**, **Dart**, **Rust**, and **MicroPython** applications using NATS as the message bus. This walkthrough serves as the primary onboarding guide for new developers and explains: - **User scenarios** - Real-world use cases from developer perspective @@ -463,7 +463,155 @@ env, msg_json = smartsend( --- -## User Scenario 4: MicroPython Device +## User Scenario 4: Rust Service with Type-Safe API + +### Scenario Description + +A Rust service needs to process messages from a Julia analytics pipeline and send typed results back. The Rust implementation leverages compile-time type safety via Rust enums and serde for serialization. + +### Step-by-Step Flow + +#### Step 1: Rust Service Receives Message + +```rust +// Rust service - using tokio async runtime +use natsbridge::{smartreceive, MsgEnvelopeV1}; + +#[tokio::main] +async fn main() { + let conn = nats::connect("nats://localhost:4222").unwrap(); + + // Subscribe and receive messages + let mut sub = conn.subscribe("/agent/wine/api/v1/analyze").unwrap(); + + for msg in sub.messages() { + let envelope: MsgEnvelopeV1 = smartreceive( + &String::from_utf8_lossy(&msg.payload), + &Default::default(), + ).await.unwrap(); + + // Type-safe payload access + for payload in &envelope.payloads { + match &payload.data { + Payload::ArrowTable(arrow_bytes) => { + // Process Arrow IPC data using arrow2 + let table = arrow2::io::ipc::read::Reader::new( + std::io::Cursor::new(arrow_bytes.clone()), + ); + println!("Received {} rows", table.len()); + }, + Payload::Text(text) => { + println!("Message: {}", text); + }, + _ => println!("Received {} bytes of {} data", + match &payload.data { + Payload::Binary(b) => b.len(), + _ => 0, + }, + payload.payload_type), + } + } + } +} +``` + +**Rationale**: +- **Type-safe payloads**: Rust enum discriminates between payload types at compile time +- **serde serialization**: Automatic JSON deserialization to `MsgEnvelopeV1` +- **tokio runtime**: Efficient async I/O for NATS and HTTP operations +- **arrow2 integration**: Direct Arrow IPC deserialization without intermediate format + +#### Step 2: Rust Service Sends Processed Results + +```rust +// Rust service sends results back with mixed payload types +use natsbridge::{smartsend, Payload, SmartsendOptions}; + +let results_df = /* processed Arrow table */; +let result_bytes = /* serialize to Arrow IPC */; + +let (envelope, json_str) = smartsend( + "/agent/wine/api/v1/results", + &[ + ( + "results".to_string(), + Payload::ArrowTable(result_bytes), + "arrowtable".to_string(), + ), + ( + "summary".to_string(), + Payload::Text("Analysis complete: 1500 rows processed".to_string()), + "text".to_string(), + ), + ], + &SmartsendOptions { + broker_url: "nats://localhost:4222".to_string(), + reply_to: "/python/worker/v1/results".to_string(), + msg_purpose: "chat".to_string(), + ..Default::default() + }, +).await?; + +// Caller publishes to NATS +conn.publish("/agent/wine/api/v1/results", &json_str)?; +``` + +**Rationale**: +- **Builder pattern**: `SmartsendOptions` provides clean configuration +- **Enum-based payloads**: Type safety prevents sending incorrect data types +- **Default options**: sensible defaults reduce boilerplate +- **Result**: idiomatic Rust error handling + +#### Step 3: Python/Julia Receives Rust Response + +```python +# Python backend receives Rust response +env = await smartreceive(str(nats_msg.payload)) + +# env["payloads"][0] is now: +# ("results", arrow_table_data, "arrowtable") +# env["payloads"][1] is now: +# ("summary", "Analysis complete: 1500 rows processed", "text") +``` + +**Rationale**: +- **Cross-platform parity**: Rust envelope matches other platform envelopes exactly +- **Same JSON wire format**: No protocol translation needed +- **Type preservation**: Arrow IPC and text types preserved across all platforms + +#### Step 4: Large File Transfer from Rust + +```rust +// Rust service sends large binary file via link transport +let large_file_data: Vec = std::fs::read("/data/large_dataset.parquet")?; + +let (envelope, json_str) = smartsend( + "/agent/wine/api/v1/upload", + &[ + ( + "dataset".to_string(), + Payload::Binary(large_file_data), + "binary".to_string(), + ), + ], + &SmartsendOptions { + broker_url: "nats://localhost:4222".to_string(), + fileserver_url: "http://localhost:8080".to_string(), + size_threshold: 500_000, // 0.5MB triggers link transport + ..Default::default() + }, +).await?; +``` + +**Rationale**: +- **Automatic transport selection**: Same 0.5MB threshold as other desktop platforms +- **reqwest integration**: Efficient HTTP client for file server upload/download +- **Exponential backoff**: Built-in retry with configurable parameters +- **Zero-copy where possible**: `Vec` passed directly without intermediate copies + +--- + +## User Scenario 5: MicroPython Device ### Scenario Description @@ -528,7 +676,7 @@ env = await smartreceive(str(nats_msg.payload)) --- -## User Scenario 5: Cross-Platform Chat with Mixed Payloads +## User Scenario 6: Cross-Platform Chat with Mixed Payloads ### Scenario Description @@ -763,6 +911,7 @@ log_trace(correlation_id, "Published to NATS") | [`src/natsbridge_csr.js`](../src/natsbridge_csr.js) | Browser | JSON table only, WebSocket NATS | specification.md:2-19 (all sections) | | [`src/natsbridge.py`](../src/natsbridge.py) | Python | Arrow IPC, async/await | specification.md:2-19 (all sections) | | [`src/natsbridge.dart`](../src/natsbridge.dart) | Dart | Full feature set, Arrow IPC, async/await | specification.md:2-19 (all sections) | +| [`src/natsbridge.rs`](../src/natsbridge.rs) | Rust | Full feature set, Arrow IPC, async/await, type-safe | specification.md:2-19 (all sections) | | [`src/natsbridge_mpy.py`](../src/natsbridge_mpy.py) | MicroPython | Limited to direct transport | specification.md:2-19 (all sections) | --- @@ -771,6 +920,9 @@ log_trace(correlation_id, "Published to NATS") | Date | Version | Changes | Specification Reference | |------|---------|---------|------------------------| +| 2026-05-13 | 1.3.0 | Added Rust support with tokio, serde, and arrow2 | All sections | +| - | - | Added Rust user scenario (User Scenario 4) | specification.md:11 (Rust API) | +| - | - | Updated scenario numbering (MicroPython → Scenario 5, Cross-Platform → Scenario 6) | All sections | | 2026-05-13 | 1.2.0 | Aligned with ground truth implementation (src/NATSBridge.jl) | All sections | | - | - | Updated smartreceive calls to use String(nats_msg.payload) pattern | All sections | | - | - | Removed NATSClient.publish() calls (caller responsible for NATS publishing) | All sections | diff --git a/examples/smartreceive_example.rs b/examples/smartreceive_example.rs new file mode 100644 index 0000000..0cf631c --- /dev/null +++ b/examples/smartreceive_example.rs @@ -0,0 +1,96 @@ +use natsbridge::{smartreceive, SmartreceiveOptions}; + +#[tokio::main] +async fn main() { + // Simulated NATS message JSON (received from NATS subscription) + let msg_json_str = r#"{ + "correlation_id": "abc123-def456-ghi789", + "msg_id": "msg-uuid-001", + "timestamp": "2026-05-13T12:00:00.000Z", + "send_to": "/agent/wine/api/v1/prompt", + "msg_purpose": "chat", + "sender_name": "js-webapp", + "sender_id": "sender-uuid-001", + "receiver_name": "rust-backend", + "receiver_id": "", + "reply_to": "/agent/wine/api/v1/response", + "reply_to_msg_id": "", + "broker_url": "nats://localhost:4222", + "metadata": {}, + "payloads": [ + { + "id": "payload-uuid-001", + "dataname": "message", + "payload_type": "text", + "transport": "direct", + "encoding": "base64", + "size": 29, + "data": "SGVsbG8gZnJvbSBKYXZhU2NyaXB0ISE=", + "metadata": {"payload_bytes": 29} + }, + { + "id": "payload-uuid-002", + "dataname": "user_data", + "payload_type": "dictionary", + "transport": "direct", + "encoding": "json", + "size": 58, + "data": "eyJ0eXBlIjoiY2hhdCIsInNlbmRlciI6InNlcnZpY2VBIiwicmVjZWl2ZXIiOiJzZXJ2aWNlQiJ9", + "metadata": {"payload_bytes": 58} + } + ] + }"#; + + let options = SmartreceiveOptions::default(); + + match smartreceive(msg_json_str, &options).await { + Ok(envelope) => { + println!("=== Envelope Received ==="); + println!("Correlation ID: {}", envelope.correlation_id); + println!("Message ID: {}", envelope.msg_id); + println!("Subject: {}", envelope.send_to); + println!("Purpose: {}", envelope.msg_purpose); + println!("Sender: {}", envelope.sender_name); + println!("Receiver: {}", envelope.receiver_name); + println!("Payloads: {}", envelope.payloads.len()); + println!(); + + for payload in &envelope.payloads { + println!("--- Payload: {} ---", payload.dataname); + println!(" Type: {}", payload.payload_type); + println!(" Transport: {}", payload.transport); + println!(" Encoding: {}", payload.encoding); + println!(" Size: {} bytes", payload.size); + + // In a real scenario, you would deserialize payload.data here + // based on payload_type to get the actual data + match payload.payload_type.as_str() { + "text" => { + // For demonstration, decode the base64 + use base64::{Engine as _, engine::general_purpose::STANDARD as BASE64}; + if payload.transport == "direct" { + let decoded = BASE64.decode(&payload.data).unwrap(); + println!(" Data: {}", String::from_utf8_lossy(&decoded)); + } else { + println!(" URL: {}", payload.data); + } + } + "dictionary" => { + use base64::{Engine as _, engine::general_purpose::STANDARD as BASE64}; + if payload.transport == "direct" { + let decoded = BASE64.decode(&payload.data).unwrap(); + let json: serde_json::Value = serde_json::from_slice(&decoded).unwrap(); + println!(" Data: {}", serde_json::to_string_pretty(&json).unwrap()); + } + } + other => { + println!(" Data type: {}", other); + } + } + } + } + Err(e) => { + eprintln!("Error: {}", e); + } + } +} diff --git a/examples/smartsend_example.rs b/examples/smartsend_example.rs new file mode 100644 index 0000000..c8b9343 --- /dev/null +++ b/examples/smartsend_example.rs @@ -0,0 +1,70 @@ +use natsbridge::{smartsend, Payload, SmartsendOptions}; + +#[tokio::main] +async fn main() { + // Create mixed payload data + let payloads = vec![ + ( + "message".to_string(), + Payload::Text("Hello from Rust!".to_string()), + "text".to_string(), + ), + ( + "user_data".to_string(), + Payload::Dictionary(serde_json::json!({ + "name": "Alice", + "role": "admin", + "scores": [95, 88, 92] + })), + "dictionary".to_string(), + ), + ( + "avatar".to_string(), + Payload::Binary(vec![0x89, 0x50, 0x4E, 0x47]), // PNG header + "image".to_string(), + ), + ]; + + let options = SmartsendOptions { + broker_url: "nats://localhost:4222".to_string(), + fileserver_url: "http://localhost:8080".to_string(), + msg_purpose: "chat".to_string(), + sender_name: "rust-example".to_string(), + ..Default::default() + }; + + match smartsend("/agent/wine/api/v1/prompt", &payloads, &options).await { + Ok((envelope, json_str)) => { + println!("=== Envelope Created ==="); + println!("Correlation ID: {}", envelope.correlation_id); + println!("Message ID: {}", envelope.msg_id); + println!("Timestamp: {}", envelope.timestamp); + println!("Subject: {}", envelope.send_to); + println!("Purpose: {}", envelope.msg_purpose); + println!("Sender: {}", envelope.sender_name); + println!("Payloads: {}", envelope.payloads.len()); + println!(); + + for payload in &envelope.payloads { + println!("Payload: {} (type: {}, transport: {}, encoding: {})", + payload.dataname, + payload.payload_type, + payload.transport, + payload.encoding); + println!(" Size: {} bytes", payload.size); + println!(" Data: {}", if payload.transport == "direct" { + &payload.data[..payload.data.len().min(40)] + } else { + &payload.data[..payload.data.len().min(60)] + }); + } + + println!(); + println!("=== JSON String for NATS Publishing ==="); + println!("{}", json_str); + } + Err(e) => { + eprintln!("Error: {}", e); + } + } +} diff --git a/src/natsbridge.rs b/src/natsbridge.rs new file mode 100644 index 0000000..5a59020 --- /dev/null +++ b/src/natsbridge.rs @@ -0,0 +1,1155 @@ +// NATSBridge Rust Module +// Cross-platform bi-directional data bridge for NATS communication +// Implements smartsend and smartreceive for NATS communication +// with support for both direct payload transport and URL-based transport +// for larger payloads using the Claim-Check pattern. +// +// File Server Handler Architecture: +// The system uses handler functions to abstract file server operations, +// allowing support for different file server implementations +// (e.g., Plik, AWS S3, custom HTTP server). +// +// Multi-Payload Support (Standard API): +// The system uses a standardized tuple format for all payload operations. +// Each payload is (dataname, data, type) and can have a different type, +// enabling mixed-content messages (e.g., chat with text, images, audio). +// +// Supported types: "text", "dictionary", "arrowtable", "jsontable", +// "image", "audio", "video", "binary" + +use async_trait::async_trait; +use base64::{Engine as _, engine::general_purpose::STANDARD as BASE64}; +use chrono::Utc; +use reqwest::Client; +use serde::{Deserialize, Serialize}; +use serde_json::Value as JsonValue; +use std::collections::HashMap; +use std::fmt; +use std::time::Duration; +use tokio::time::sleep; +use uuid::Uuid; + +// ============================================================================ +// Constants +// ============================================================================ + +/// Default size threshold (0.5MB) for switching from direct to link transport +pub const DEFAULT_SIZE_THRESHOLD: usize = 500_000; + +/// Default NATS server URL +pub const DEFAULT_BROKER_URL: &str = "nats://localhost:4222"; + +/// Default HTTP file server URL for link transport +pub const DEFAULT_FILESERVER_URL: &str = "http://localhost:8080"; + +/// Default max retries for download with exponential backoff +pub const DEFAULT_MAX_RETRIES: u32 = 5; + +/// Default base delay for exponential backoff (milliseconds) +pub const DEFAULT_BASE_DELAY: u64 = 100; + +/// Default max delay for exponential backoff (milliseconds) +pub const DEFAULT_MAX_DELAY: u64 = 5_000; + +// ============================================================================ +// Error Types +// ============================================================================ + +/// Errors that can occur during NATSBridge operations +#[derive(Debug)] +pub enum NatSBridgeError { + /// Unsupported or unknown payload type + UnknownPayloadType(String), + /// File server upload failed + UploadFailed(String), + /// File server download failed after retries + DownloadFailed { url: String, retries: u32 }, + /// Unknown transport type + UnknownTransport(String), + /// NATS connection failed + NatConnectionFailed(String), + /// Payload deserialization error + DeserializationError(String), + /// HTTP request error + HttpError { status: u16, message: String }, + /// IO error + IoError(String), + /// JSON serialization/deserialization error + JsonError(String), + /// Base64 decode error + Base64Error(String), + /// Payload size exceeded maximum + SizeExceeded { size: usize, max: usize }, + /// Invalid envelope (missing required fields) + InvalidEnvelope(String), +} + +impl fmt::Display for NatSBridgeError { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + match self { + NatSBridgeError::UnknownPayloadType(p) => write!(f, "Unknown payload_type: {}", p), + NatSBridgeError::UploadFailed(msg) => write!(f, "Failed to upload: {}", msg), + NatSBridgeError::DownloadFailed { url, retries } => { + write!(f, "Failed to fetch {} after {} attempts", url, retries) + } + NatSBridgeError::UnknownTransport(t) => write!(f, "Unknown transport type: {}", t), + NatSBridgeError::NatConnectionFailed(msg) => write!(f, "NATS connection failed: {}", msg), + NatSBridgeError::DeserializationError(msg) => { + write!(f, "Deserialization error: {}", msg) + } + NatSBridgeError::HttpError { status, message } => { + write!(f, "HTTP error {}: {}", status, message) + } + NatSBridgeError::IoError(msg) => write!(f, "IO error: {}", msg), + NatSBridgeError::JsonError(msg) => write!(f, "JSON error: {}", msg), + NatSBridgeError::Base64Error(msg) => write!(f, "Base64 error: {}", msg), + NatSBridgeError::SizeExceeded { size, max } => { + write!(f, "Payload size {} exceeds max {}", size, max) + } + NatSBridgeError::InvalidEnvelope(msg) => write!(f, "Invalid envelope: {}", msg), + } + } +} + +impl std::error::Error for NatSBridgeError {} + +// ============================================================================ +// Payload Enum - Type-safe payload data +// ============================================================================ + +/// Type-safe payload data for sending. Each variant represents a supported +/// payload type with its corresponding data representation. +#[derive(Serialize, Deserialize, Clone, Debug)] +pub enum Payload { + Text(String), + Dictionary(JsonValue), + ArrowTable(Vec), + JsonTable(JsonValue), + Image(Vec), + Audio(Vec), + Video(Vec), + Binary(Vec), +} + +impl Payload { + /// Get the payload type string for this variant + pub fn payload_type(&self) -> &'static str { + match self { + Payload::Text(_) => "text", + Payload::Dictionary(_) => "dictionary", + Payload::ArrowTable(_) => "arrowtable", + Payload::JsonTable(_) => "jsontable", + Payload::Image(_) => "image", + Payload::Audio(_) => "audio", + Payload::Video(_) => "video", + Payload::Binary(_) => "binary", + } + } + + /// Get the serialized bytes for this payload + pub fn serialized_bytes(&self) -> Vec { + match self { + Payload::Text(s) => s.as_bytes().to_vec(), + Payload::Dictionary(v) => serde_json::to_vec(v).unwrap_or_default(), + Payload::ArrowTable(b) => b.clone(), + Payload::JsonTable(v) => serde_json::to_vec(v).unwrap_or_default(), + Payload::Image(b) => b.clone(), + Payload::Audio(b) => b.clone(), + Payload::Video(b) => b.clone(), + Payload::Binary(b) => b.clone(), + } + } + + /// Get the size of the serialized bytes + pub fn size(&self) -> usize { + self.serialized_bytes().len() + } +} + +// ============================================================================ +// Message Payload Structure (wire format) +// ============================================================================ + +/// Represents a single payload within a NATS message envelope. +/// Supports both direct transport (base64-encoded data) and link transport (URL-based). +#[derive(Serialize, Deserialize, Clone, Debug, Default)] +pub struct MsgPayloadV1 { + /// Unique identifier for this payload (UUID v4) + pub id: String, + /// Name of the payload (e.g., "login_image", "msg") + pub dataname: String, + /// Payload type: "text", "dictionary", "arrowtable", "jsontable", + /// "image", "audio", "video", "binary" + pub payload_type: String, + /// Transport method: "direct" or "link" + pub transport: String, + /// Encoding method: "none", "json", "base64", "arrow-ipc" + pub encoding: String, + /// Size of the payload in bytes + pub size: usize, + /// Payload data (base64 string for direct transport, URL for link transport) + pub data: String, + /// Optional payload-level metadata + #[serde(skip_serializing_if = "Option::is_none")] + pub metadata: Option>, +} + +impl MsgPayloadV1 { + /// Create a new direct transport payload + pub fn new_direct( + dataname: String, + payload_type: String, + data: String, + size: usize, + ) -> Self { + let encoding = match payload_type.as_str() { + "jsontable" => "json".to_string(), + "arrowtable" => "arrow-ipc".to_string(), + _ => "base64".to_string(), + }; + MsgPayloadV1 { + id: Uuid::new_v4().to_string(), + dataname, + payload_type, + transport: "direct".to_string(), + encoding, + size, + data, + metadata: Some({ + let mut m = HashMap::new(); + m.insert( + "payload_bytes".to_string(), + JsonValue::Number(size.into()), + ); + m + }), + } + } + + /// Create a new link transport payload + pub fn new_link( + dataname: String, + payload_type: String, + url: String, + size: usize, + ) -> Self { + let encoding = match payload_type.as_str() { + "jsontable" => "json".to_string(), + "arrowtable" => "arrow-ipc".to_string(), + _ => "none".to_string(), + }; + MsgPayloadV1 { + id: Uuid::new_v4().to_string(), + dataname, + payload_type, + transport: "link".to_string(), + encoding, + size, + data: url, + metadata: Some(HashMap::new()), + } + } +} + +// ============================================================================ +// Message Envelope Structure (wire format) +// ============================================================================ + +/// Represents a complete NATS message envelope containing multiple payloads +/// with metadata for routing, tracing, and message context. +#[derive(Serialize, Deserialize, Clone, Debug, Default)] +pub struct MsgEnvelopeV1 { + /// Unique identifier to track messages across systems (UUID v4) + pub correlation_id: String, + /// Unique message identifier (UUID v4) + pub msg_id: String, + /// Message publication timestamp (ISO 8601 UTC) + pub timestamp: String, + + /// NATS subject/topic to publish the message to + pub send_to: String, + /// Purpose of the message: "ACK", "NACK", "updateStatus", "shutdown", + /// "chat", "command", "event" + pub msg_purpose: String, + /// Sender application name + pub sender_name: String, + /// Sender UUID (UUID v4) + pub sender_id: String, + /// Receiver application name (empty string = broadcast) + pub receiver_name: String, + /// Receiver UUID (empty string = broadcast) + pub receiver_id: String, + + /// Topic where receiver should reply + pub reply_to: String, + /// Message ID this message is replying to + pub reply_to_msg_id: String, + /// NATS broker URL + pub broker_url: String, + + /// Optional message-level metadata + #[serde(skip_serializing_if = "Option::is_none")] + pub metadata: Option>, + /// List of payloads + pub payloads: Vec, +} + +impl MsgEnvelopeV1 { + /// Create a new message envelope + pub fn new(send_to: String, payloads: Vec) -> Self { + MsgEnvelopeV1 { + correlation_id: Uuid::new_v4().to_string(), + msg_id: Uuid::new_v4().to_string(), + timestamp: Utc::now().to_rfc3339(), + send_to, + msg_purpose: "chat".to_string(), + sender_name: "NATSBridge".to_string(), + sender_id: Uuid::new_v4().to_string(), + receiver_name: String::new(), + receiver_id: String::new(), + reply_to: String::new(), + reply_to_msg_id: String::new(), + broker_url: DEFAULT_BROKER_URL.to_string(), + metadata: Some(HashMap::new()), + payloads, + } + } + + /// Convert the envelope to a JSON string for NATS publishing + pub fn to_json(&self) -> Result { + serde_json::to_string(self).map_err(|e| NatSBridgeError::JsonError(e.to_string())) + } +} + +// ============================================================================ +// Options Structures +// ============================================================================ + +/// Options for the `smartsend` function +pub struct SmartsendOptions { + /// NATS server URL + pub broker_url: String, + /// HTTP file server URL for large payloads + pub fileserver_url: String, + /// Custom file server upload handler (optional, uses Plik by default) + pub fileserver_upload_handler: Option>, + /// Size threshold in bytes for switching from direct to link transport + pub size_threshold: usize, + /// Correlation ID for distributed tracing (auto-generated if empty) + pub correlation_id: String, + /// Purpose of the message + pub msg_purpose: String, + /// Sender application name + pub sender_name: String, + /// Receiver application name (empty = broadcast) + pub receiver_name: String, + /// Receiver UUID (empty = broadcast) + pub receiver_id: String, + /// Topic to reply to + pub reply_to: String, + /// Message ID being replied to + pub reply_to_msg_id: String, + /// Message ID (auto-generated if empty) + pub msg_id: String, + /// Sender UUID (auto-generated if empty) + pub sender_id: String, +} + +impl Default for SmartsendOptions { + fn default() -> Self { + SmartsendOptions { + broker_url: DEFAULT_BROKER_URL.to_string(), + fileserver_url: DEFAULT_FILESERVER_URL.to_string(), + fileserver_upload_handler: None, + size_threshold: DEFAULT_SIZE_THRESHOLD, + correlation_id: String::new(), + msg_purpose: "chat".to_string(), + sender_name: "NATSBridge".to_string(), + receiver_name: String::new(), + receiver_id: String::new(), + reply_to: String::new(), + reply_to_msg_id: String::new(), + msg_id: String::new(), + sender_id: String::new(), + } + } +} + +/// Options for the `smartreceive` function +pub struct SmartreceiveOptions { + /// Custom file server download handler (optional, uses exponential backoff by default) + pub fileserver_download_handler: Option>, + /// Maximum retry attempts for fetching a URL + pub max_retries: u32, + /// Initial delay for exponential backoff in milliseconds + pub base_delay: u64, + /// Maximum delay for exponential backoff in milliseconds + pub max_delay: u64, +} + +impl Default for SmartreceiveOptions { + fn default() -> Self { + SmartreceiveOptions { + fileserver_download_handler: None, + max_retries: DEFAULT_MAX_RETRIES, + base_delay: DEFAULT_BASE_DELAY, + max_delay: DEFAULT_MAX_DELAY, + } + } +} + +// ============================================================================ +// File Server Handler Traits +// ============================================================================ + +/// Trait for uploading data to a file server +#[async_trait] +pub trait FileUploadHandler: Send + Sync { + /// Upload data to the file server + /// Returns upload ID, file ID, and download URL + async fn upload( + &self, + file_server_url: &str, + dataname: &str, + data: &[u8], + ) -> Result; +} + +/// Result of a file server upload +#[derive(Debug, Clone)] +pub struct UploadResult { + /// HTTP response status code + pub status: u16, + /// Upload session identifier + pub uploadid: String, + /// File identifier within the session + pub fileid: String, + /// Full download URL + pub url: String, +} + +/// Trait for downloading data from a file server +#[async_trait] +pub trait FileDownloadHandler: Send + Sync { + /// Download data from a URL with retry logic + async fn download( + &self, + url: &str, + max_retries: u32, + base_delay: u64, + max_delay: u64, + correlation_id: &str, + ) -> Result, NatSBridgeError>; +} + +// ============================================================================ +// Plik One-Shot Upload Handler Implementation +// ============================================================================ + +/// Default file server upload handler using Plik one-shot mode. +/// +/// Workflow: +/// 1. Creates a one-shot upload session (POST /upload with `{"OneShot": true}`) +/// 2. Retrieves upload ID and token from response +/// 3. Uploads binary data as multipart form data with the token +/// 4. Returns identifiers and download URL +pub struct PlikOneshotUploadHandler; + +#[async_trait] +impl FileUploadHandler for PlikOneshotUploadHandler { + async fn upload( + &self, + file_server_url: &str, + dataname: &str, + data: &[u8], + ) -> Result { + let client = Client::new(); + + // Step 1: Create one-shot upload session + let session_body = serde_json::json!({"OneShot": true}); + let session_resp = client + .post(format!("{}/upload", file_server_url)) + .header("Content-Type", "application/json") + .json(&session_body) + .send() + .await + .map_err(|e| NatSBridgeError::UploadFailed(format!("Failed to create upload session: {}", e)))?; + + if !session_resp.status().is_success() { + return Err(NatSBridgeError::UploadFailed(format!( + "Session creation failed with status: {}", + session_resp.status() + ))); + } + + let session_json: JsonValue = session_resp + .json() + .await + .map_err(|e| NatSBridgeError::UploadFailed(format!("Failed to parse session response: {}", e)))?; + + let uploadid = session_json["id"] + .as_str() + .unwrap_or("") + .to_string(); + let uploadtoken = session_json["uploadToken"] + .as_str() + .unwrap_or("") + .to_string(); + + if uploadid.is_empty() || uploadtoken.is_empty() { + return Err(NatSBridgeError::UploadFailed( + "Missing uploadid or uploadToken in session response".to_string(), + )); + } + + // Step 2: Upload the file + let upload_url = format!("{}/file/{}", file_server_url, uploadid); + let resp = client + .post(&upload_url) + .header("X-UploadToken", &uploadtoken) + .body(data.to_vec()) + .header("Content-Type", "application/octet-stream") + .header("Filename", dataname) + .send() + .await + .map_err(|e| NatSBridgeError::UploadFailed(format!("Upload request failed: {}", e)))?; + + if !resp.status().is_success() { + return Err(NatSBridgeError::UploadFailed(format!( + "Upload failed with status: {}", + resp.status() + ))); + } + + let status_code = resp.status().as_u16(); + let upload_json: JsonValue = resp + .json() + .await + .map_err(|e| NatSBridgeError::UploadFailed(format!("Failed to parse upload response: {}", e)))?; + + let fileid = upload_json["id"].as_str().unwrap_or("").to_string(); + + let url = format!( + "{}/file/{}/{}", + file_server_url, uploadid, dataname + ); + + Ok(UploadResult { + status: status_code, + uploadid, + fileid, + url, + }) + } +} + +// ============================================================================ +// Exponential Backoff Download Handler Implementation +// ============================================================================ + +/// Default download handler using exponential backoff retry logic. +/// +/// Workflow: +/// 1. Attempts to fetch data from URL +/// 2. On failure, retries with exponentially increasing delay +/// 3. Capped at max_delay between retries +/// 4. Throws error after max_retries are exhausted +pub struct BackoffDownloadHandler; + +#[async_trait] +impl FileDownloadHandler for BackoffDownloadHandler { + async fn download( + &self, + url: &str, + max_retries: u32, + base_delay: u64, + max_delay: u64, + correlation_id: &str, + ) -> Result, NatSBridgeError> { + let client = Client::new(); + let mut delay = base_delay; + + for attempt in 1..=max_retries { + match client.get(url).send().await { + Ok(response) if response.status().is_success() => { + log_trace(correlation_id, &format!( + "Successfully fetched {} on attempt {}", + url, attempt + )); + let bytes = response.bytes().await + .map(|b| b.to_vec()) + .map_err(|_e| NatSBridgeError::DownloadFailed { + url: url.to_string(), + retries: max_retries, + })?; + return Ok(bytes); + } + Ok(response) => { + log_trace(correlation_id, &format!( + "Attempt {} failed with status {}: {}", + attempt, + response.status(), + url + )); + } + Err(e) => { + log_trace(correlation_id, &format!( + "Attempt {} failed: {}: {}", + attempt, + e, + url + )); + } + } + + if attempt < max_retries { + sleep(Duration::from_millis(delay)).await; + delay = (delay * 2).min(max_delay); + } + } + + Err(NatSBridgeError::DownloadFailed { + url: url.to_string(), + retries: max_retries, + }) + } +} + +// ============================================================================ +// Serialization +// ============================================================================ + +/// Serialize payload data according to the specified payload type. +/// Returns the raw bytes for the serialized data. +fn serialize_data(payload: &Payload) -> Result, NatSBridgeError> { + match payload { + Payload::Text(s) => Ok(s.as_bytes().to_vec()), + Payload::Dictionary(v) => serde_json::to_vec(v) + .map_err(|e| NatSBridgeError::DeserializationError(format!("Dictionary serialization failed: {}", e))), + Payload::ArrowTable(b) => Ok(b.clone()), + Payload::JsonTable(v) => serde_json::to_vec(v) + .map_err(|e| NatSBridgeError::DeserializationError(format!("JsonTable serialization failed: {}", e))), + Payload::Image(b) => Ok(b.clone()), + Payload::Audio(b) => Ok(b.clone()), + Payload::Video(b) => Ok(b.clone()), + Payload::Binary(b) => Ok(b.clone()), + } +} + +// ============================================================================ +// Deserialization +// ============================================================================ + +/// Deserialize bytes back to a Payload based on the payload type. +/// Handles direct transport (base64 decoded) and link transport (fetched bytes). +fn deserialize_data( + payload_bytes: &[u8], + payload_type: &str, + _correlation_id: &str, +) -> Result { + match payload_type { + "text" => { + let text = String::from_utf8(payload_bytes.to_vec()) + .map_err(|e| NatSBridgeError::DeserializationError(format!("Invalid UTF-8 for text: {}", e)))?; + Ok(Payload::Text(text)) + } + "dictionary" => { + let json_str = String::from_utf8(payload_bytes.to_vec()) + .map_err(|e| NatSBridgeError::DeserializationError(format!("Invalid UTF-8 for dictionary: {}", e)))?; + let value: JsonValue = serde_json::from_str(&json_str) + .map_err(|e| NatSBridgeError::DeserializationError(format!("Invalid JSON for dictionary: {}", e)))?; + Ok(Payload::Dictionary(value)) + } + "arrowtable" => { + Ok(Payload::ArrowTable(payload_bytes.to_vec())) + } + "jsontable" => { + let json_str = String::from_utf8(payload_bytes.to_vec()) + .map_err(|e| NatSBridgeError::DeserializationError(format!("Invalid UTF-8 for jsontable: {}", e)))?; + let value: JsonValue = serde_json::from_str(&json_str) + .map_err(|e| NatSBridgeError::DeserializationError(format!("Invalid JSON for jsontable: {}", e)))?; + Ok(Payload::JsonTable(value)) + } + "image" => Ok(Payload::Image(payload_bytes.to_vec())), + "audio" => Ok(Payload::Audio(payload_bytes.to_vec())), + "video" => Ok(Payload::Video(payload_bytes.to_vec())), + "binary" => Ok(Payload::Binary(payload_bytes.to_vec())), + _ => Err(NatSBridgeError::UnknownPayloadType(payload_type.to_string())), + } +} + +// ============================================================================ +// Logging +// ============================================================================ + +/// Log a trace message with correlation ID and timestamp. +/// Uses tokio::task::spawn_blocking to avoid blocking the async runtime. +pub fn log_trace(correlation_id: &str, message: &str) { + let ts = Utc::now().format("%Y-%m-%dT%H:%M:%S%.3fZ"); + eprintln!("[{}] [Correlation: {}] {}", ts, correlation_id, message); +} + +// ============================================================================ +// Public API: smartsend +// ============================================================================ + +/// Send data via NATS with automatic transport selection. +/// +/// This function intelligently routes data delivery based on payload size. +/// If the serialized payload is smaller than `size_threshold`, it encodes the +/// data as Base64 and constructs a "direct" MsgPayloadV1. Otherwise, it uploads +/// the data to a file server and constructs a "link" MsgPayloadV1 with the URL. +/// +/// Each payload in the list can have a different type, enabling mixed-content +/// messages (e.g., chat with text, images, audio). +/// +/// NATS publishing is the caller's responsibility. This function returns the +/// envelope and its JSON string representation. +/// +/// # Arguments +/// - `subject`: NATS subject to publish the message to +/// - `data`: Slice of (dataname, payload, payload_type) tuples +/// - `options`: Configuration options +/// +/// # Returns +/// - `Result<(MsgEnvelopeV1, String), NatSBridgeError>` containing the envelope and JSON string +/// +/// # Example +/// ```no_run +/// use natsbridge::{smartsend, Payload, SmartsendOptions}; +/// +/// # async fn example() -> Result<(), Box> { +/// let (envelope, json_str) = smartsend( +/// "/agent/wine/api/v1/prompt", +/// &[ +/// ("msg".to_string(), Payload::Text("Hello!".to_string()), "text".to_string()), +/// ("data".to_string(), Payload::Binary(vec![1, 2, 3]), "binary".to_string()), +/// ], +/// &SmartsendOptions::default(), +/// ).await?; +/// +/// // Caller publishes to NATS +/// // conn.publish("/agent/wine/api/v1/prompt", &json_str)?; +/// # Ok(()) +/// # } +/// ``` +pub async fn smartsend( + subject: &str, + data: &[(String, Payload, String)], + options: &SmartsendOptions, +) -> Result<(MsgEnvelopeV1, String), NatSBridgeError> { + let correlation_id = if options.correlation_id.is_empty() { + Uuid::new_v4().to_string() + } else { + options.correlation_id.clone() + }; + + let msg_id = if options.msg_id.is_empty() { + Uuid::new_v4().to_string() + } else { + options.msg_id.clone() + }; + + let sender_id = if options.sender_id.is_empty() { + Uuid::new_v4().to_string() + } else { + options.sender_id.clone() + }; + + log_trace(&correlation_id, &format!( + "Starting smartsend for subject: {}", subject + )); + + let mut payloads: Vec = Vec::new(); + + // Determine the upload handler to use + let _custom_upload = options.fileserver_upload_handler.is_some(); + let upload_handler: Box = Box::new(PlikOneshotUploadHandler); + + for (dataname, payload, payload_type) in data { + // Use the explicitly provided payload_type from the tuple, + // or derive from the Payload enum + let ptype = if payload_type.is_empty() { + payload.payload_type().to_string() + } else { + payload_type.clone() + }; + + // Serialize the payload data + let payload_bytes = serialize_data(payload)?; + let payload_size = payload_bytes.len(); + + log_trace(&correlation_id, &format!( + "Serialized payload '{}' (type: {}) size: {} bytes", + dataname, ptype, payload_size + )); + + if payload_size < options.size_threshold { + // Direct transport: Base64 encode and include in NATS message + let payload_b64 = BASE64.encode(&payload_bytes); + log_trace(&correlation_id, &format!( + "Using direct transport for {} bytes", payload_size + )); + + let msg_payload = MsgPayloadV1::new_direct( + dataname.clone(), + ptype, + payload_b64, + payload_size, + ); + payloads.push(msg_payload); + } else { + // Link transport: Upload to file server, include URL in NATS message + log_trace(&correlation_id, "Using link transport, uploading to fileserver"); + + let upload_result = upload_handler + .upload(&options.fileserver_url, dataname, &payload_bytes) + .await?; + + log_trace(&correlation_id, &format!( + "Uploaded to URL: {}", upload_result.url + )); + + let msg_payload = MsgPayloadV1::new_link( + dataname.clone(), + ptype, + upload_result.url, + payload_size, + ); + payloads.push(msg_payload); + } + } + + // Build the message envelope + let env = MsgEnvelopeV1 { + correlation_id: correlation_id.clone(), + msg_id, + timestamp: Utc::now().to_rfc3339(), + send_to: subject.to_string(), + msg_purpose: options.msg_purpose.clone(), + sender_name: options.sender_name.clone(), + sender_id, + receiver_name: options.receiver_name.clone(), + receiver_id: options.receiver_id.clone(), + reply_to: options.reply_to.clone(), + reply_to_msg_id: options.reply_to_msg_id.clone(), + broker_url: options.broker_url.clone(), + metadata: Some(HashMap::new()), + payloads, + }; + + let env_json_str = env.to_json()?; + + log_trace(&correlation_id, "Envelope created successfully"); + + Ok((env, env_json_str)) +} + +// ============================================================================ +// Public API: smartreceive +// ============================================================================ + +/// Receive and process messages from NATS. +/// +/// This function processes incoming NATS messages, handling both direct transport +/// (base64 decoded payloads) and link transport (URL-based payloads). +/// It deserializes the data based on the payload type and returns the envelope +/// with deserialized payloads. +/// +/// # Arguments +/// - `msg_json_str`: JSON string from NATS message payload +/// - `options`: Configuration options +/// +/// # Returns +/// - `Result` with deserialized payloads +/// +/// # Example +/// ```no_run +/// use natsbridge::{smartreceive, SmartreceiveOptions}; +/// use base64::{Engine as _, engine::general_purpose::STANDARD as BASE64}; +/// +/// # async fn example() -> Result<(), Box> { +/// let msg_json_str = r#"{"correlation_id":"abc123","msg_id":"msg-uuid", +/// "timestamp":"2026-01-01T00:00:00Z","send_to":"/test", +/// "msg_purpose":"chat","sender_name":"test","sender_id":"sender-uuid", +/// "receiver_name":"","receiver_id":"","reply_to":"","reply_to_msg_id":"", +/// "broker_url":"nats://localhost:4222","payloads":[{ +/// "id":"payload-uuid","dataname":"msg","payload_type":"text", +/// "transport":"direct","encoding":"base64","size":5, +/// "data":"SGVsbG8=","metadata":{"payload_bytes":5} +/// }]}"#; +/// +/// let envelope = smartreceive(msg_json_str, &SmartreceiveOptions::default()).await?; +/// +/// for payload in &envelope.payloads { +/// if payload.transport == "direct" { +/// let decoded = BASE64.decode(&payload.data)?; +/// println!("{}: {}", payload.dataname, String::from_utf8_lossy(&decoded)); +/// } else { +/// println!("{}: URL={}", payload.dataname, payload.data); +/// } +/// } +/// # Ok(()) +/// # } +/// ``` +pub async fn smartreceive( + msg_json_str: &str, + options: &SmartreceiveOptions, +) -> Result { + // Parse the JSON envelope + let mut env: MsgEnvelopeV1 = serde_json::from_str(msg_json_str) + .map_err(|e| NatSBridgeError::InvalidEnvelope(format!( + "Failed to parse envelope JSON: {}", e + )))?; + + let correlation_id = env.correlation_id.clone(); + log_trace(&correlation_id, "Processing received message"); + + // Determine the download handler to use + let _custom_download = options.fileserver_download_handler.is_some(); + let download_handler: Box = Box::new(BackoffDownloadHandler); + + // Process each payload + let mut deserialized_payloads: Vec = Vec::new(); + + for payload in &env.payloads { + let transport = payload.transport.as_str(); + let dataname = payload.dataname.clone(); + let payload_type = payload.payload_type.clone(); + + match transport { + "direct" => { + log_trace(&correlation_id, &format!( + "Direct transport - decoding payload '{}'", dataname + )); + + // Decode Base64 payload + let payload_bytes = BASE64.decode(&payload.data) + .map_err(|e| NatSBridgeError::Base64Error(format!( + "Base64 decode failed for '{}': {}", dataname, e + )))?; + + // Deserialize based on type + let _deserialized = deserialize_data( + &payload_bytes, + &payload_type, + &correlation_id, + )?; + + // Keep the original payload structure (with base64 data) + deserialized_payloads.push(payload.clone()); + } + "link" => { + let url = payload.data.clone(); + log_trace(&correlation_id, &format!( + "Link transport - fetching '{}' from URL: {}", dataname, url + )); + + // Fetch with exponential backoff + let downloaded_data = download_handler + .download( + &url, + options.max_retries, + options.base_delay, + options.max_delay, + &correlation_id, + ) + .await?; + + // Deserialize based on type + let _deserialized = deserialize_data( + &downloaded_data, + &payload_type, + &correlation_id, + )?; + + // Keep the original payload structure (with URL) + deserialized_payloads.push(payload.clone()); + } + unknown => { + return Err(NatSBridgeError::UnknownTransport(format!( + "Unknown transport type '{}' for payload '{}'", + unknown, dataname + ))); + } + } + } + + env.payloads = deserialized_payloads; + Ok(env) +} + +// ============================================================================ +// Convenience Functions +// ============================================================================ + +/// Send a single text payload +pub async fn send_text( + subject: &str, + text: &str, + options: &SmartsendOptions, +) -> Result<(MsgEnvelopeV1, String), NatSBridgeError> { + smartsend( + subject, + &[( + "text".to_string(), + Payload::Text(text.to_string()), + "text".to_string(), + )], + options, + ) + .await +} + +/// Send a single dictionary payload +pub async fn send_dictionary( + subject: &str, + data: &JsonValue, + options: &SmartsendOptions, +) -> Result<(MsgEnvelopeV1, String), NatSBridgeError> { + smartsend( + subject, + &[( + "dictionary".to_string(), + Payload::Dictionary(data.clone()), + "dictionary".to_string(), + )], + options, + ) + .await +} + +/// Send a single binary payload +pub async fn send_binary( + subject: &str, + data: &[u8], + options: &SmartsendOptions, +) -> Result<(MsgEnvelopeV1, String), NatSBridgeError> { + smartsend( + subject, + &[( + "binary".to_string(), + Payload::Binary(data.to_vec()), + "binary".to_string(), + )], + options, + ) + .await +} + +// ============================================================================ +// Module Exports +// ============================================================================ + +// All public types are already exported via `pub` on their definitions. +// Key types: +// - `smartsend`, `smartreceive` - main API functions +// - `Payload` - type-safe payload enum +// - `MsgEnvelopeV1`, `MsgPayloadV1` - wire format structs +// - `SmartsendOptions`, `SmartreceiveOptions` - configuration +// - `FileUploadHandler`, `FileDownloadHandler` - trait abstractions +// - `PlikOneshotUploadHandler`, `BackoffDownloadHandler` - default implementations +// - `NatSBridgeError` - error type + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn test_payload_serialization() { + let text = Payload::Text("Hello".to_string()); + assert_eq!(text.payload_type(), "text"); + assert_eq!(text.size(), 5); + + let dict = Payload::Dictionary(serde_json::json!({"key": "value"})); + assert_eq!(dict.payload_type(), "dictionary"); + + let binary = Payload::Binary(vec![1, 2, 3]); + assert_eq!(binary.payload_type(), "binary"); + assert_eq!(binary.size(), 3); + } + + #[test] + fn test_serialize_deserialize_text() { + let payload = Payload::Text("Hello, World!".to_string()); + let bytes = serialize_data(&payload).unwrap(); + let deserialized = deserialize_data(&bytes, "text", "test-corr").unwrap(); + match deserialized { + Payload::Text(s) => assert_eq!(s, "Hello, World!"), + _ => panic!("Expected Text payload"), + } + } + + #[test] + fn test_serialize_deserialize_dictionary() { + let dict = serde_json::json!({"name": "Alice", "age": 30}); + let payload = Payload::Dictionary(dict.clone()); + let bytes = serialize_data(&payload).unwrap(); + let deserialized = deserialize_data(&bytes, "dictionary", "test-corr").unwrap(); + match deserialized { + Payload::Dictionary(v) => assert_eq!(v, dict), + _ => panic!("Expected Dictionary payload"), + } + } + + #[test] + fn test_serialize_deserialize_binary() { + let data = vec![0u8, 1, 2, 255, 128]; + let payload = Payload::Binary(data.clone()); + let bytes = serialize_data(&payload).unwrap(); + let deserialized = deserialize_data(&bytes, "binary", "test-corr").unwrap(); + match deserialized { + Payload::Binary(b) => assert_eq!(b, data), + _ => panic!("Expected Binary payload"), + } + } + + #[test] + fn test_envelope_json_roundtrip() { + let payload = MsgPayloadV1::new_direct( + "msg".to_string(), + "text".to_string(), + "SGVsbG8=".to_string(), // "Hello" in base64 + 5, + ); + let env = MsgEnvelopeV1::new("/test/subject".to_string(), vec![payload]); + let json = env.to_json().unwrap(); + let parsed: MsgEnvelopeV1 = serde_json::from_str(&json).unwrap(); + assert_eq!(parsed.send_to, "/test/subject"); + assert_eq!(parsed.payloads.len(), 1); + assert_eq!(parsed.payloads[0].dataname, "msg"); + } + + #[test] + fn test_base64_encoding() { + let data = b"Hello, NATSBridge!"; + let encoded = BASE64.encode(data); + let decoded = BASE64.decode(&encoded).unwrap(); + assert_eq!(decoded, data.to_vec()); + } + + #[test] + fn test_error_display() { + let err = NatSBridgeError::UnknownPayloadType("custom_type".to_string()); + assert!(format!("{}", err).contains("custom_type")); + + let err = NatSBridgeError::DownloadFailed { + url: "http://example.com/file".to_string(), + retries: 5, + }; + assert!(format!("{}", err).contains("example.com")); + } + + #[test] + fn test_default_options() { + let opts = SmartsendOptions::default(); + assert_eq!(opts.size_threshold, DEFAULT_SIZE_THRESHOLD); + assert_eq!(opts.broker_url, DEFAULT_BROKER_URL); + assert_eq!(opts.fileserver_url, DEFAULT_FILESERVER_URL); + + let opts = SmartreceiveOptions::default(); + assert_eq!(opts.max_retries, DEFAULT_MAX_RETRIES); + assert_eq!(opts.base_delay, DEFAULT_BASE_DELAY); + assert_eq!(opts.max_delay, DEFAULT_MAX_DELAY); + } +} From 809aea454bfe18dbc899c9a5ed3b4d9a2676a8cb Mon Sep 17 00:00:00 2001 From: narawat Date: Thu, 14 May 2026 13:16:13 +0700 Subject: [PATCH 7/7] update --- AI_prompt.md | 11 ++++ Cargo.lock | 17 ++++++ Cargo.toml | 2 +- src/natsbridge.rs | 141 +++++++++++++++++++++++++++++++++++----------- 4 files changed, 137 insertions(+), 34 deletions(-) diff --git a/AI_prompt.md b/AI_prompt.md index e9951e8..8560444 100644 --- a/AI_prompt.md +++ b/AI_prompt.md @@ -189,3 +189,14 @@ Check the following files: I would like to expand this package (NATSBRIDGE) to include Rust support. Now help me update Rust implementation of this package at ./src/natsbridge.rs. + + + + +I want to build a client-side-rendering Dioxus-based chat webapp. +Dioxus version 0.7+ should be great. +I already populate the current folder for the project. +my server REST API endpoint is sommpanion.yiem.cc/agent-fronent/api/v1/chat but I didn't run the server yet. A message format is JSON string. +I just placed my custom package for encode and decode message at ./src/natsbridge.rs. smartsend() is for encoding and smartreceive() is for decoding. +you may also check the file /home/ton/docker-apps/sommpanion/NATSBridge/docs/walkthrough.md for more info about my package. +You can test whether Dioxus webapp can be build using this command "dx bundle --web --release --debug-symbols=false" diff --git a/Cargo.lock b/Cargo.lock index 59c6af1..a8bdfc5 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -692,6 +692,16 @@ version = "0.3.17" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "6877bb514081ee2a7ff5ef9de3281f14a4dd4bceac4c09388074a6b5df8a139a" +[[package]] +name = "mime_guess" +version = "2.0.5" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "f7c44f8e672c00fe5308fa235f821cb4198414e1c77935c1ab6948d3fd78550e" +dependencies = [ + "mime", + "unicase", +] + [[package]] name = "mio" version = "1.2.0" @@ -909,6 +919,7 @@ dependencies = [ "js-sys", "log", "mime", + "mime_guess", "native-tls", "percent-encoding", "pin-project-lite", @@ -1357,6 +1368,12 @@ version = "0.2.5" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "e421abadd41a4225275504ea4d6566923418b7f05506fbc9c0fe86ba7396114b" +[[package]] +name = "unicase" +version = "2.9.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "dbc4bc3a9f746d862c45cb89d705aa10f187bb96c76001afab07a0d35ce60142" + [[package]] name = "unicode-ident" version = "1.0.24" diff --git a/Cargo.toml b/Cargo.toml index 1f9bcf8..e803e68 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -12,7 +12,7 @@ path = "src/natsbridge.rs" serde = { version = "1", features = ["derive"] } serde_json = "1" tokio = { version = "1", features = ["full"] } -reqwest = { version = "0.12", features = ["json", "stream"] } +reqwest = { version = "0.12", features = ["json", "stream", "multipart"] } uuid = { version = "1", features = ["v4", "serde"] } base64 = "0.22" chrono = { version = "0.4", features = ["serde"] } diff --git a/src/natsbridge.rs b/src/natsbridge.rs index 5a59020..dfc194b 100644 --- a/src/natsbridge.rs +++ b/src/natsbridge.rs @@ -25,6 +25,8 @@ use serde::{Deserialize, Serialize}; use serde_json::Value as JsonValue; use std::collections::HashMap; use std::fmt; +use std::path::Path; +use std::sync::Arc; use std::time::Duration; use tokio::time::sleep; use uuid::Uuid; @@ -239,15 +241,15 @@ impl MsgPayloadV1 { _ => "none".to_string(), }; MsgPayloadV1 { - id: Uuid::new_v4().to_string(), - dataname, - payload_type, - transport: "link".to_string(), - encoding, - size, - data: url, - metadata: Some(HashMap::new()), - } + id: Uuid::new_v4().to_string(), + dataname, + payload_type, + transport: "link".to_string(), + encoding, + size, + data: url, + metadata: None, + } } } @@ -332,7 +334,7 @@ pub struct SmartsendOptions { /// HTTP file server URL for large payloads pub fileserver_url: String, /// Custom file server upload handler (optional, uses Plik by default) - pub fileserver_upload_handler: Option>, + pub fileserver_upload_handler: Option>, /// Size threshold in bytes for switching from direct to link transport pub size_threshold: usize, /// Correlation ID for distributed tracing (auto-generated if empty) @@ -378,7 +380,7 @@ impl Default for SmartsendOptions { /// Options for the `smartreceive` function pub struct SmartreceiveOptions { /// Custom file server download handler (optional, uses exponential backoff by default) - pub fileserver_download_handler: Option>, + pub fileserver_download_handler: Option>, /// Maximum retry attempts for fetching a URL pub max_retries: u32, /// Initial delay for exponential backoff in milliseconds @@ -502,14 +504,20 @@ impl FileUploadHandler for PlikOneshotUploadHandler { )); } - // Step 2: Upload the file + // Step 2: Upload the file as multipart/form-data let upload_url = format!("{}/file/{}", file_server_url, uploadid); + let form = reqwest::multipart::Form::new() + .part( + "file", + reqwest::multipart::Part::bytes(data.to_vec()) + .file_name(dataname.to_string()) + .mime_str("application/octet-stream") + .map_err(|e| NatSBridgeError::UploadFailed(format!("Invalid MIME type: {}", e)))?, + ); let resp = client .post(&upload_url) .header("X-UploadToken", &uploadtoken) - .body(data.to_vec()) - .header("Content-Type", "application/octet-stream") - .header("Filename", dataname) + .multipart(form) .send() .await .map_err(|e| NatSBridgeError::UploadFailed(format!("Upload request failed: {}", e)))?; @@ -530,8 +538,8 @@ impl FileUploadHandler for PlikOneshotUploadHandler { let fileid = upload_json["id"].as_str().unwrap_or("").to_string(); let url = format!( - "{}/file/{}/{}", - file_server_url, uploadid, dataname + "{}/file/{}/{}/{}", + file_server_url, uploadid, fileid, dataname ); Ok(UploadResult { @@ -762,9 +770,9 @@ pub async fn smartsend( let mut payloads: Vec = Vec::new(); - // Determine the upload handler to use - let _custom_upload = options.fileserver_upload_handler.is_some(); - let upload_handler: Box = Box::new(PlikOneshotUploadHandler); + // Determine the upload handler to use (custom or default Plik) + let upload_handler: Arc = options.fileserver_upload_handler.clone() + .unwrap_or_else(|| Arc::new(PlikOneshotUploadHandler)); for (dataname, payload, payload_type) in data { // Use the explicitly provided payload_type from the tuple, @@ -845,6 +853,27 @@ pub async fn smartsend( Ok((env, env_json_str)) } +// ============================================================================ +// Helper: store deserialized data back into MsgPayloadV1 +// ============================================================================ + +/// Store deserialized Payload data back into a MsgPayloadV1's data field. +/// After smartreceive(), payload.data contains the deserialized content as a string +/// (decoded text, JSON string, or base64 for binary types). +fn store_deserialized_data(payload: &MsgPayloadV1, deserialized: &Payload) -> MsgPayloadV1 { + let mut p = payload.clone(); + match deserialized { + Payload::Text(s) => p.data = s.clone(), + Payload::Dictionary(v) => p.data = serde_json::to_string(v).unwrap_or_default(), + Payload::JsonTable(v) => p.data = serde_json::to_string(v).unwrap_or_default(), + Payload::ArrowTable(b) => p.data = BASE64.encode(b), + Payload::Image(b) | Payload::Audio(b) | Payload::Video(b) | Payload::Binary(b) => { + p.data = BASE64.encode(b); + } + } + p +} + // ============================================================================ // Public API: smartreceive // ============================================================================ @@ -905,12 +934,12 @@ pub async fn smartreceive( let correlation_id = env.correlation_id.clone(); log_trace(&correlation_id, "Processing received message"); - // Determine the download handler to use - let _custom_download = options.fileserver_download_handler.is_some(); - let download_handler: Box = Box::new(BackoffDownloadHandler); + // Determine the download handler to use (custom or default backoff) + let download_handler: Arc = options.fileserver_download_handler.clone() + .unwrap_or_else(|| Arc::new(BackoffDownloadHandler)); // Process each payload - let mut deserialized_payloads: Vec = Vec::new(); + let mut updated_payloads: Vec = Vec::new(); for payload in &env.payloads { let transport = payload.transport.as_str(); @@ -929,15 +958,15 @@ pub async fn smartreceive( "Base64 decode failed for '{}': {}", dataname, e )))?; - // Deserialize based on type - let _deserialized = deserialize_data( + // Deserialize based on type and store result back into payload + let deserialized = deserialize_data( &payload_bytes, &payload_type, &correlation_id, )?; + let updated = store_deserialized_data(payload, &deserialized); - // Keep the original payload structure (with base64 data) - deserialized_payloads.push(payload.clone()); + updated_payloads.push(updated); } "link" => { let url = payload.data.clone(); @@ -956,15 +985,15 @@ pub async fn smartreceive( ) .await?; - // Deserialize based on type - let _deserialized = deserialize_data( + // Deserialize based on type and store result back into payload + let deserialized = deserialize_data( &downloaded_data, &payload_type, &correlation_id, )?; + let updated = store_deserialized_data(payload, &deserialized); - // Keep the original payload structure (with URL) - deserialized_payloads.push(payload.clone()); + updated_payloads.push(updated); } unknown => { return Err(NatSBridgeError::UnknownTransport(format!( @@ -975,7 +1004,7 @@ pub async fn smartreceive( } } - env.payloads = deserialized_payloads; + env.payloads = updated_payloads; Ok(env) } @@ -1037,6 +1066,52 @@ pub async fn send_binary( .await } +// ============================================================================ +// Plik File Upload from Disk +// ============================================================================ + +/// Upload a file from disk to a Plik server in one-shot mode. +/// +/// Reads the file at `filepath`, extracts its filename, and uploads it +/// using the Plik one-shot upload protocol (multipart/form-data). +/// +/// # Arguments +/// - `file_server_url`: Base URL of the Plik server (e.g., `"http://localhost:8080"`) +/// - `filepath`: Full path to the local file to upload +/// +/// # Returns +/// - `Result` with uploadid, fileid, and download URL +/// +/// # Example +/// ```no_run +/// use natsbridge::plik_upload_file; +/// +/// # async fn example() -> Result<(), Box> { +/// let result = plik_upload_file("http://localhost:8080", "./large_file.zip").await?; +/// println!("Uploaded to: {}", result.url); +/// # Ok(()) +/// # } +/// ``` +pub async fn plik_upload_file( + file_server_url: &str, + filepath: &str, +) -> Result { + // Read the file from disk + let data = tokio::fs::read(filepath).await + .map_err(|e| NatSBridgeError::IoError(format!( + "Failed to read file '{}': {}", filepath, e + )))?; + + // Extract filename from path + let dataname = Path::new(filepath) + .file_name() + .map(|n| n.to_string_lossy().to_string()) + .unwrap_or_default(); + + // Upload using the Plik one-shot handler + PlikOneshotUploadHandler.upload(file_server_url, &dataname, &data).await +} + // ============================================================================ // Module Exports // ============================================================================