fix: 调整readFile实现支持大块传输

src/index.tsx

@@ -248,6 +248,11 @@ export function Home() {
     // alert(fc?.count);
     let files = await jensen.listFiles();
     console.log(files);
+    let totalLength = 0;
+    for (const f of files) {
+      totalLength += f.length;
+    }
+    Logger.info('jensen', 'listFiles', 'Total Length: ' + (totalLength / 1024 / 1024).toFixed(2) + 'MB');
     setFiles(files)
     await releaseJensen();
   }
@@ -829,11 +834,19 @@ export function Home() {
     if (jensen == null) return;
     const fname = '2026Feb04-152156-Rec00.wav';
     let rst = await jensen.readFile(fname, 0, 1024 * 1024 * 2);
-    console.log('xxxxxx0', rst);
+    console.log('xxxxxx0', rst.length);
     // Logger.info('jensen', 'read-block', 'Read Block: ' + JSON.stringify(rst));
     await releaseJensen();
   }
 
+  const readCardInfo = async () => {
+    let jensen = await getJensen();
+    if (jensen == null) return;
+    let rst = await jensen.getCardInfo(5);
+    Logger.info('jensen', 'card-info', 'Get Card Info: ' + JSON.stringify(rst));
+    await releaseJensen();
+  }
+
   return (
     <>
     <div className="btn-container" style={{ display: 'flex', flexDirection: 'row', gap: '16px', padding: '16px', alignItems: 'center', flexWrap: 'wrap' }}>
@@ -842,6 +855,7 @@ export function Home() {
       <button onClick={getTime}>Get Time</button>
       <button onClick={listFiles}>List Files</button>
       <button onClick={transferFile}>Transfer</button>
+      <button onClick={readCardInfo}>Card Info</button>
       <button onClick={batteryStatus}>Battery</button>
       <button onClick={getBluetoothStatus}>Bluetooth Status</button>
       <button onClick={bluetoothScan}>Start Scan</button>

src/utils/jensen.js

@@ -339,7 +339,7 @@ function Jensen(log, conn) {
     current = 'cmd-' + cmd.command + '-' + cmd.index;
     Logger.debug('jensen', 'sendNext', pid + '-command: ' + current + ', data bytes: ' + data.byteLength);
 
-    self.timewait = cmd.command == TRANSFER_FILE || cmd.command == GET_FILE_BLOCK ? 1000 : 10;
+    self.timewait = cmd.command == TRANSFER_FILE || cmd.command == GET_FILE_BLOCK || cmd.command == TRANSFER_FILE_PARTIAL ? 1000 : 10;
     console.log(pid + '-send', data);
     if (self.onprogress && cmd.command == TRANSFER_FILE)
     {
@@ -1059,7 +1059,9 @@ Jensen.prototype.deleteFile = async function (filename, seconds) {
 };
 
 Jensen.prototype.readFile = async function (filename, offset, length, seconds) {
-  // 如果确定支持的版本号
+  if (typeof length != 'number') throw new Error('parameter `length` required');
+  if (length <= 0) throw new Error('parameter `length` must greater than zero');
+
   let data = [];
   data.push((offset >> 24) & 0xff);
   data.push((offset >> 16) & 0xff);
@@ -1070,6 +1072,33 @@ Jensen.prototype.readFile = async function (filename, offset, length, seconds) {
   data.push((length >> 8) & 0xff);
   data.push((length >> 0) & 0xff);
   for (let i = 0; i < filename.length; i++) data.push(filename.charCodeAt(i));
+
+  let chunks = [];
+  let flen = 0;
+  let handler = (msg) => {
+    if (msg != null) {
+      let chunk = msg.body;
+      let chunkLen = chunk.length || chunk.byteLength;
+      flen += chunkLen;
+      chunks.push(chunk);
+      if (flen >= length) {
+        let result = new Uint8Array(Math.min(flen, length));
+        let pos = 0;
+        for (let i = 0; i < chunks.length && pos < result.length; i++) {
+          let c = chunks[i];
+          let cview = c instanceof Uint8Array ? c : new Uint8Array(c);
+          let toCopy = Math.min(cview.length, result.length - pos);
+          result.set(cview.subarray(0, toCopy), pos);
+          pos += toCopy;
+        }
+        return result;
+      }
+    } else {
+      Logger.info('jensen', 'readFile', 'file transfer fail.');
+      return null;
+    }
+  };
+  this.registerHandler(TRANSFER_FILE_PARTIAL, handler);
   return this.send(new Command(TRANSFER_FILE_PARTIAL).body(data), seconds);
 }