rename and add log

(cherry picked from commit 49eb6e93)

src/jensen.js

@@ -706,7 +706,7 @@ Jensen.prototype.getFile = async function (filename, length, ondata, onprogress)
 
     let wakeLock = null;
     let timer = null;
-    async function visibilitychange() {
+    function visibilitychange() {
         let audio = document.getElementById('test_audio');
         if (!audio) {
             audio = document.createElement('audio');
@@ -741,11 +741,12 @@ Jensen.prototype.getFile = async function (filename, length, ondata, onprogress)
         }
     }
 
-    function removeAudio() {
+    function clearEventAndTask() {
         const audio = document.getElementById('test_audio');
         audio && audio.pause() && audio.remove();
         wakeLock && wakeLock.release();
         timer && clearInterval(timer)
+        console.log('Clear event and task.');
     }
 
     visibilitychange();
@@ -758,17 +759,17 @@ Jensen.prototype.getFile = async function (filename, length, ondata, onprogress)
             flen += msg.body.length || msg.body.byteLength;
             ondata(msg.body);
             Logger.info('jensen', 'getFile length', `${length} ${flen}`)
-            removeAudio();
+            clearEventAndTask();
             if (flen >= length) {
                 document.removeEventListener('visibilitychange', visibilitychange);
                 Logger.info('jensen', 'getFile', 'file download finish.')
-                removeAudio();
+                clearEventAndTask();
                 // return OK indicates all file blocks received
                 return 'OK';
             }
         } else {
             document.removeEventListener('visibilitychange', visibilitychange);
-            removeAudio();
+            clearEventAndTask();
             Logger.info('jensen', 'getFile', 'file download fail.')
             ondata('fail');
         }