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https://issues.apache.org/jira/browse/CB-7660?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14251649#comment-14251649
]
Andreas Waal commented on CB-7660:
----------------------------------
Hi,
I am also experiencing this issue. Please see attached screenshots. After a day
of debugging this is what I found.
* This issue occures when downloading large amounts( 10k ++) of small files.
* When downloading large amounts of large files, it releases memory correctly.
What I tried without any sucess:
* Adding delay after n-number downloads
* Adding delay after each download
This can be reproduces with the following Cordova program.
{code}
var DownloadFile = function(){
return {
downloadFile :function(file,done){
console.log(JSON.stringify(file));
function win(entry)
{
console.log("Downloaded : " + file.name + " ok");
done();
}
function fail(error)
{
console.log("ERROR!");
console.log(error.code);
done();
}
var uri = encodeURI(file.url);
window.requestFileSystem(LocalFileSystem.PERSISTENT, 0,
function(fileSystem) {
fileSystem.root.getFile(file.name, {create: true, exclusive:
false}, function(fileEntry) {
var localPath = fileEntry.toURL();
var ft = new FileTransfer();
ft.download(uri,localPath,win,fail,false);
},function(error){console.log("errore 1: " + error.code);});
},function(error){console.log("errore 2: " + error.code);});
}
}
};
var getFiles = function(){
var smallFile =
'https://upload.wikimedia.org/wikipedia/en/4/4d/Sample_sawtooth.jpg';
var largeFile =
"http://upload.wikimedia.org/wikipedia/commons/5/5b/Ultraviolet_image_of_the_Cygnus_Loop_Nebula_crop.jpg";;
var files = [];
for(var i = 0; i < 50000; i++){
files.push({name : i + '.jpg', url : largeFile});
}
return files;
};
function startDownload(){
var downloadFileNative = new DownloadFile();
var files = getFiles();
var downloadNext = function(){
document.getElementById("status").innerText = 'Files left :' +
files.length;
if(files.length > 0){
downloadFileNative.downloadFile(files.splice(0,1)[0],downloadNext);
}
};
downloadFileNative.downloadFile(files.splice(0,1)[0],downloadNext);
}
var app = {
initialize: function() {
this.bindEvents();
},
bindEvents: function() {
document.addEventListener('deviceready', this.onDeviceReady, false);
},
onDeviceReady: function() {
startDownload();
}
};
app.initialize();
{code}
> Cordova iOS File-Transfer download memory leaks
> -----------------------------------------------
>
> Key: CB-7660
> URL: https://issues.apache.org/jira/browse/CB-7660
> Project: Apache Cordova
> Issue Type: Bug
> Components: Plugin File Transfer
> Affects Versions: 3.5.0
> Environment: iOS 7.0.3 on iPad2 - Cordova 3.5
> Reporter: Jordi Valls Carbonell
> Assignee: Shazron Abdullah
>
> File-Transfer memory leaks downloading files, no memory is released for each
> file downloaded, finally i got "Memory Warning".
> To test add a button and call "testDownload" function every time console
> confirmation message is displayed ("DOWNLOADED OK")
> {code}
> function win(entry)
> {
> console.log("DOWNLOADED OK");
> }
> function fail(error)
> {
> console.log("ERROR!");
> console.log(error.code);
> }
> function testDownload
> {
> var url =
> "http://upload.wikimedia.org/wikipedia/commons/5/5b/Ultraviolet_image_of_the_Cygnus_Loop_Nebula_crop.jpg";;
> var filename = "filename.jpg";
> var uri = encodeURI(url);
> window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, function(fileSystem) {
> fileSystem.root.getFile(filename, {create: true, exclusive: false},
> function(fileEntry) {
> var localPath = fileEntry.toURL();
> var ft = new FileTransfer();
> ft.download(uri,localPath,win,fail,false);
> },function(error){console.log("errore 1: " + error.code);});
> },function(error){console.log("errore 2: " + error.code);});
> }
> {code}
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![http://upload.wikimedia.org/wikipedia/commons/5/5b/Ultraviolet_image_of_the_Cygnus_Loop_Nebula_crop.jpg"](https://upload.wikimedia.org/wikipedia/commons/5/5b/Ultraviolet_image_of_the_Cygnus_Loop_Nebula_crop.jpg"){kind=link}