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use HEAD to get file size, only rename once all parts are downloaded

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j 2015-04-11 14:41:50 +02:00
parent 5032d95958
commit aa8a7de312
1 changed files with 64 additions and 18 deletions
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66
static/js/fs.js
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@ -53,7 +53,25 @@ pandora.fs = (function() {
});
}
function done() {
var n = 0;
if (part + 1 == parts) {
Ox.range(parts).forEach(function(part) {
var name = that.getVideoName(id, pandora.user.ui.videoResolution, part + 1),
partialName = 'partial::' + name;
renameFile(partialName, name, function(fileEntry) {
if (fileEntry) {
that.local[name] = fileEntry.toURL();
} else {
Ox.print('rename failed');
callback && callback({progress: -1, error: 'rename failed'});
}
if (++n == parts) {
callback && callback({
progress: 1
});
}
});
});
delete that.downloads[id];
active = false;
if (queue.length) {
@ -156,7 +174,10 @@ pandora.fs = (function() {
fileEntry.createWriter(function(fileWriter) {
append && fileWriter.seek(fileWriter.length);
fileWriter.onwriteend = function(e) {
callback({progress: 1});
callback({
progress: 1,
url: fileEntry.toURL()
});
};
fileWriter.onerror = function(event) {
Ox.Log('FS', 'Write failed: ' + event.toString());
@ -194,15 +215,49 @@ pandora.fs = (function() {
url = '/' + pandora.getVideoURLName(id, resolution, part, track),
blobSize = 5*1024*1024, total;
Ox.Log('FS', 'start downloading', url);
getSize(url, function(size) {
Ox.Log('FS', 'HEAD', url, size);
total = size;
that.fs.root.getFile(partialName, {create: false}, function(fileEntry) {
fileEntry.getMetadata(function(meta) {
if (meta.size >= total) {
Ox.Log('FS', 'file exists, done', meta.size, total);
callback({
progress: 1,
total: total,
url: fileEntry.toURL()
})
} else {
Ox.Log('FS', 'resume from', meta.size);
partialDownload(meta.size);
}
});
}, function() {
Ox.Log('FS', 'new download');
partialDownload(0);
});
});
function getSize(url, callback) {
var xhr = new XMLHttpRequest();
xhr.open('HEAD', url, true);
xhr.addEventListener('load', function(event) {
callback(event.total);
});
xhr.addEventListener('error', function (event) {
setTimeout(function() {
getSize(url, callback);
}, 1000);
});
xhr.addEventListener('abort', function (event) {
callback({progress: -1, event: event});
});
xhr.addEventListener('timeout', function (event) {
setTimeout(function() {
getSize(url, callback);
}, 1000);
});
xhr.send();
}
function partialDownload(offset) {
var end = offset + blobSize - 1;
if (total) {
@ -240,16 +295,7 @@ pandora.fs = (function() {
if (offset + blob.size < total) {
partialDownload(offset + blob.size);
} else {
renameFile(partialName, name, function(fileEntry) {
if (fileEntry) {
that.local[name] = fileEntry.toURL();
response.url = that.local[name];
callback(response);
} else {
Ox.print('rename failed');
callback({progress: -1, error: 'rename failed'});
}
});
}
}, true);
});