update js client

src/msghandler-csr.js

@@ -27,9 +27,9 @@
 // ---------------------------------------------- Constants ---------------------------------------------- //
 
 /**
- * Default size threshold for switching from direct to link transport (0.5MB)
+ * Default size threshold for switching from direct to link transport (10KB)
  */
-const DEFAULT_SIZE_THRESHOLD = 500_000;
+const DEFAULT_SIZE_THRESHOLD = 10_000;
 
 /**
  * Default broker URL
@@ -39,7 +39,7 @@ const DEFAULT_BROKER_URL = 'localhost:4222';
 /**
  * Default HTTP file server URL for link transport
  */
-const DEFAULT_FILESERVER_URL = 'http://localhost:8080';
+const DEFAULT_FILESERVER_URL = 'https://fileserver.yiem.cc';
 
 // ---------------------------------------------- Utility Functions ---------------------------------------------- //
 
@@ -50,7 +50,11 @@ const DEFAULT_FILESERVER_URL = 'http://localhost:8080';
  */
 function bufferToBase64(data) {
     const bytes = new Uint8Array(data);
-    const binary = String.fromCharCode(...bytes);
+    let binary = '';
+    const chunkSize = 8192;
+    for (let i = 0; i < bytes.length; i += chunkSize) {
+        binary += String.fromCharCode.apply(null, bytes.subarray(i, i + chunkSize));
+    }
     return btoa(binary);
 }
 
@@ -199,6 +203,37 @@ async function deserializeData(data, payloadType, correlationId) {
 
 // ---------------------------------------------- File Server Handlers ---------------------------------------------- //
 
+/**
+ * Upload data to a pre-signed S3 URL
+ * @param {string} signUrl - Pre-signed S3 URL (complete URL, not base) or empty string
+ * @param {string} dataname - The S3 key / object path
+ * @param {Uint8Array} data - Raw bytes to upload
+ * @param {Object} options - Additional options
+ * @param {string} [options.content_type="application/json"] - MIME type for the PUT request
+ * @returns {Promise<{status: number, uploadid: string, fileid: string, url: string}>}
+ */
+async function s3UploadHandler(signUrl, dataname, data, options = {}) {
+    const { content_type = 'application/json' } = options;
+    const buffer = data instanceof Uint8Array ? data : new Uint8Array(data);
+    
+    if (signUrl !== '' && signUrl !== undefined) {
+        const response = await fetch(signUrl, {
+            method: 'PUT',
+            headers: { 'Content-Type': content_type },
+            body: buffer
+        });
+        
+        return {
+            status: response.status,
+            uploadid: '',
+            fileid: '',
+            url: dataname
+        };
+    } else {
+        throw new Error('No pre-signed URL available for S3 upload');
+    }
+}
+
 /**
  * Upload data to plik server in one-shot mode
  * @param {string} fileServerUrl - Base URL of the plik server
@@ -616,6 +651,11 @@ const msghandlerCSR = {
      */
     plikOneshotUpload,
 
+    /**
+     * Upload data to a pre-signed S3 URL
+     */
+    s3UploadHandler,
+
     /**
      * Fetch data from URL with exponential backoff
      */