fix: adding timeout for getFile()

src/utils/jensen.js

@@ -1248,40 +1248,62 @@ Jensen.prototype.getFile = async function (filename, length, ondata, onprogress)
   // document.addEventListener('visibilitychange', visibilitychange);
   let stime = new Date();
   let flen = 0;
+  let finished = false;
+  let lastActivityTime = Date.now();
+  const IDLE_TIMEOUT_MS = 2000;
+
+  const idleTimer = setInterval(() => {
+    if (finished) {
+      clearInterval(idleTimer);
+      return;
+    }
+    if (Date.now() - lastActivityTime > IDLE_TIMEOUT_MS) {
+      clearInterval(idleTimer);
+      if (!finished) {
+        finished = true;
+        Logger.info(this.identifier(), 'getFile',
+          `transfer timeout: no data for ${IDLE_TIMEOUT_MS}ms, received ${flen}/${length} bytes`);
+        ondata('fail');
+      }
+    }
+  }, 500);
+
   let handler = (msg) => {
+    if (finished) return;
+    lastActivityTime = Date.now();
+
     if (msg != null) {
       const bodyLen = msg.body ? (msg.body.byteLength ?? msg.body.length ?? 0) : 0;
       if (bodyLen === 0 && flen === 0) {
+        finished = true;
+        clearInterval(idleTimer);
         Logger.info(this.identifier(), 'getFile', 'file not found (0-length body).');
         ondata('fail');
         return 'fail';
       }
       flen += bodyLen;
       ondata(msg.body);
-      // Logger.info('jensen', 'getFile length', `${length} ${flen}`);
       if (flen >= length) {
-        // document.removeEventListener('visibilitychange', visibilitychange);
+        finished = true;
+        clearInterval(idleTimer);
         let cost = new Date().getTime() - stime.getTime();
         Logger.info(this.identifier(), 'getFile', 'file transfer finish, cost: ' + cost + ' ms');
-        // clearEventAndTask();
-        // return OK indicates all file blocks received
         return 'OK';
       }
     } else {
-      // document.removeEventListener('visibilitychange', visibilitychange);
-      // clearEventAndTask();
+      finished = true;
+      clearInterval(idleTimer);
       Logger.info(this.identifier(), 'getFile', 'file transfer fail.');
       ondata('fail');
       return 'fail';
     }
   };
-  // this.onreceive = onprogress;
   this._progress_report = {};
-  // try { onprogress(0); } catch(e) {}
   let self = this;
   this.onprogress = onprogress;
   this.onreceive = function(recvBytes)
   {
+    lastActivityTime = Date.now();
     let percent = Math.floor(recvBytes / length * 100);
     let k = 't' + percent;
     if (percent > 0 && percent < 100)