test: download File

src/jensen.js

-import { Logger } from './utils/utils';
+import {Logger} from './utils/utils';
 
 const QUERY_DEVICE_INFO = 0x01;
 const QUERY_DEVICE_TIME = 0x02;
@@ -124,7 +124,7 @@ function Jensen() {
         if (r) return;
 
         let conn = await navigator.usb.requestDevice({
-            filters: [{ vendorId: 0x10d6 }],
+            filters: [{vendorId: 0x10d6}],
         });
         await conn.open();
         self.model = conn.productId == 45069 ? 'hidock-h1e' : 'hidock-h1';
@@ -172,7 +172,8 @@ function Jensen() {
         Logger.info('jensen', 'disconnect', 'disconnect');
         try {
             await device?.close();
-        } catch (e) {}
+        } catch (e) {
+        }
     };
 
     this.send = function (cmd, seconds, onprogress) {
@@ -313,7 +314,8 @@ function Jensen() {
         if (self.onreceive)
             try {
                 self.onreceive(totalBytes);
-            } catch (e) {}
+            } catch (e) {
+            }
     };
 
     const tryDecode = function () {
@@ -453,7 +455,7 @@ function Jensen() {
         // for (let i = 0; i < padding; i++) this.buffer[i + cutLen];
         cutLen += padding;
         // self.buffer = self.buffer.slice(cutLen);
-        return { message: new Message(cmdid, sequeue, body), length: cutLen };
+        return {message: new Message(cmdid, sequeue, body), length: cutLen};
     };
 
     this.to_bcd = function (str) {
@@ -590,7 +592,7 @@ Jensen.prototype.listFiles = async function () {
         let fnpad = function (v) {
             return v > 9 ? v : '0' + v;
         };
-        for (let i = start; i < data.length; ) {
+        for (let i = start; i < data.length;) {
             let len = 0;
             let fname = [];
 
@@ -693,18 +695,30 @@ Jensen.prototype.getFile = async function (filename, length, ondata, onprogress)
     let fname = [];
     for (let i = 0; i < filename.length; i++) fname.push(filename.charCodeAt(i));
 
+    function visibilitychange() {
+        if (document.visibilityState === 'hidden') {
+            console.log('Page is hidden');
+            // 可以选择暂停数据传输，或通过 Web Worker 继续后台任务
+        } else {
+            console.log('Page is visible');
+            // 重新开始或恢复数据传输
+        }
+    }
+
+    document.addEventListener('visibilitychange', visibilitychange);
+
     let flen = 0;
     let handler = (msg) => {
         if (msg != null) {
             flen += msg.body.length || msg.body.byteLength;
-            // let hexString = Array.from(msg.body).map(b => b.toString(16).padStart(2, '0')).join('');
-            // let regex = /4869446f636b564d.*/;
-            // let result = hexString.replace(regex, '');
-            // let data = new Uint8Array(result.match(/.{1,2}/g).map(byte => parseInt(byte, 16)));
             ondata(msg.body);
+            if (flen >= length) {
+                document.removeEventListener('visibilitychange', visibilitychange);
                 // return OK indicates all file blocks received
-            if (flen >= length) return 'OK';
+                return 'OK';
+            }
         } else {
+            document.removeEventListener('visibilitychange', visibilitychange);
             ondata('fail');
         }
     };
@@ -742,25 +756,25 @@ Jensen.prototype.endBNC = async function (seconds) {
 
 Jensen.prototype.getSettings = async function (seconds) {
     if (this.versionNumber < 327714) {
-        return { autoRecord: false, autoPlay: false };
+        return {autoRecord: false, autoPlay: false};
     }
     return this.send(new Command(GET_SETTINGS), seconds);
 };
 Jensen.prototype.setAutoRecord = function (enable, seconds) {
-    if (this.versionNumber < 327714) return { result: false };
+    if (this.versionNumber < 327714) return {result: false};
     return this.send(new Command(SET_SETTINGS).body([0, 0, 0, enable ? 1 : 2]), seconds);
 };
 Jensen.prototype.setAutoPlay = function (enable, seconds) {
-    if (this.versionNumber < 327714) return { result: false };
+    if (this.versionNumber < 327714) return {result: false};
     return this.send(new Command(SET_SETTINGS).body([0, 0, 0, 0, 0, 0, 0, enable ? 1 : 2,]), seconds);
 };
 Jensen.prototype.setNotification = function (enable, seconds) {
-    if (this.versionNumber < 327714) return { result: false };
+    if (this.versionNumber < 327714) return {result: false};
     return this.send(new Command(SET_SETTINGS).body([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, enable ? 1 : 2]), seconds);
 };
-Jensen.prototype.setBluetoothPromptPlay = function(enable, seconds) {
-    if (this.model === 'hidock-h1e' && this.versionNumber < 393218) return { result: false }
-    if (this.model === 'hidock-h1' && this.versionNumber < 327732) return { result: false }
+Jensen.prototype.setBluetoothPromptPlay = function (enable, seconds) {
+    if (this.model === 'hidock-h1e' && this.versionNumber < 393218) return {result: false}
+    if (this.model === 'hidock-h1' && this.versionNumber < 327732) return {result: false}
     return this.send(new Command(SET_SETTINGS).body([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, enable ? 1 : 2]), seconds);
 }
 
@@ -788,8 +802,8 @@ Jensen.prototype.test = async function (seconds) {
     return this.send(new Command(DEVICE_MSG_TEST), seconds);
 };
 
-Jensen.prototype.getFileBlock = async function(filename, length, ondata) {
-    if (typeof(length) != 'number') throw new Error('parameter `length` required');
+Jensen.prototype.getFileBlock = async function (filename, length, ondata) {
+    if (typeof (length) != 'number') throw new Error('parameter `length` required');
     if (length <= 0) throw new Error('parameter `length` must greater than zero');
     if (this.fileLength > 0) return null;
 
@@ -808,7 +822,7 @@ Jensen.prototype.getFileBlock = async function(filename, length, ondata) {
 }
 
 const commonMessageParser = (msg) => {
-    return { result: msg.body[0] === 0x00 ? 'success' : 'failed' };
+    return {result: msg.body[0] === 0x00 ? 'success' : 'failed'};
 };
 Jensen.registerHandler(SET_DEVICE_TIME, commonMessageParser);
 Jensen.registerHandler(BNC_DEMO_TEST, commonMessageParser);
@@ -817,7 +831,7 @@ Jensen.registerHandler(DELETE_FILE, (msg) => {
     if (msg.body[0] === 0x00) rst = 'success';
     else if (msg.body[0] === 0x01) rst = 'not-exists';
     else if (msg.body[0] === 0x02) rst = 'failed';
-    return { result: rst };
+    return {result: rst};
 });
 Jensen.registerHandler(QUERY_DEVICE_INFO, (msg, jensen) => {
     let vc = [],
@@ -859,19 +873,19 @@ Jensen.registerHandler(QUERY_DEVICE_TIME, (msg, jensen) => {
     };
 });
 Jensen.registerHandler(QUERY_FILE_COUNT, (msg) => {
-    if (msg.body.length === 0) return { count: 0 };
+    if (msg.body.length === 0) return {count: 0};
     let c = 0;
     for (let i = 0; i < 4; i++) {
         let b = msg.body[i] & 0xff;
         c = c | (b << ((4 - i - 1) * 8));
     }
-    return { count: c };
+    return {count: c};
 });
 Jensen.registerHandler(GET_SETTINGS, (msg) => {
     let r1 = msg.body[3];
     let r2 = msg.body[7];
     let r4 = msg.body[15];
-    let rst = { autoRecord: r1 === 1, autoPlay: r2 === 1, bluetoothTone: r4 === 1 };
+    let rst = {autoRecord: r1 === 1, autoPlay: r2 === 1, bluetoothTone: r4 === 1};
     if (msg.body.length >= 12) {
         let r3 = msg.body[11] === 1;
         rst['notification'] = r3;
@@ -888,11 +902,11 @@ Jensen.registerHandler(REQUEST_FIRMWARE_UPGRADE, (msg) => {
     if (c === 0x01) rst = 'wrong-version';
     if (c === 0x02) rst = 'busy';
     if (c === 0x03) return 'unknown';
-    return { result: rst };
+    return {result: rst};
 });
 Jensen.registerHandler(FIRMWARE_UPLOAD, (msg) => {
     let c = msg.body[0];
-    return { result: c === 0x00 ? 'success' : 'failed' };
+    return {result: c === 0x00 ? 'success' : 'failed'};
 });
 Jensen.registerHandler(READ_CARD_INFO, (msg) => {
     let i = 0;
@@ -900,11 +914,11 @@ Jensen.registerHandler(READ_CARD_INFO, (msg) => {
     let capacity = ((msg.body[i++] & 0xff) << 24) | ((msg.body[i++] & 0xff) << 16) | ((msg.body[i++] & 0xff) << 8) | (msg.body[i++] & 0xff);
     let status = ((msg.body[i++] & 0xff) << 24) | ((msg.body[i++] & 0xff) << 16) | ((msg.body[i++] & 0xff) << 8) | (msg.body[i++] & 0xff);
 
-    return { used: used, capacity: capacity, status: status.toString(16) };
+    return {used: used, capacity: capacity, status: status.toString(16)};
 });
 Jensen.registerHandler(FORMAT_CARD, commonMessageParser);
 Jensen.registerHandler(GET_RECORDING_FILE, (msg) => {
-    if (msg.body == null || msg.body.length === 0) return { recording: null };
+    if (msg.body == null || msg.body.length === 0) return {recording: null};
     else {
         let fname = [];
         for (var i = 0; i < msg.body.length; i++) {
@@ -947,4 +961,4 @@ Jensen.registerHandler(RECORD_TEST_END, commonMessageParser);
 Jensen.registerHandler(DEVICE_MSG_TEST, commonMessageParser);
 Jensen.registerHandler(GET_FILE_BLOCK, commonMessageParser);
 
-export { Jensen };
+export {Jensen};