|
function Uploader(url, cb) {
this.ws = new WebSocket(url);
if (cb) this.ws.onopen = cb;
this.sendQueue = [];
this.sending = null;
this.sendCallback = null;
this.ondone = null;
var self = this;
this.ws.onmessage = function(event) {
var data = JSON.parse(event.data);
if (data.event == 'complete') {
if (data.path != self.sending.path) {
self.sendQueue = [];
self.sending = null;
self.sendCallback = null;
throw new Error('Got message for wrong file!');
}
self.sending = null;
var callback = self.sendCallback;
self.sendCallback = null;
if (callback) callback();
if (self.sendQueue.length === 0 && self.ondone) self.ondone(null);
if (self.sendQueue.length > 0) {
var args = self.sendQueue.pop();
setTimeout(function() { self.sendFile.apply(self, args); }, 0);
}
}
else if (data.event == 'error') {
self.sendQueue = [];
self.sending = null;
var callback = self.sendCallback;
self.sendCallback = null;
var error = new Error('Server reported send error for file ' + data.path);
if (callback) callback(error);
if (self.ondone) self.ondone(error);
}
}
}
Uploader.prototype.sendFile = function(file, cb) {
if (this.ws.readyState != WebSocket.OPEN) throw new Error('Not connected');
if (this.sending) {
this.sendQueue.push(arguments);
return;
}
var fileData = { name: file.name, path: file.webkitRelativePath };
this.sending = fileData;
this.sendCallback = cb;
this.ws.send(JSON.stringify(fileData));
this.ws.send(file);
}
Uploader.prototype.close = function() {
this.ws.close();
}
|
By viewing downloads associated with this article you agree to the Terms of Service and the article's licence.
If a file you wish to view isn't highlighted, and is a text file (not binary), please
let us know and we'll add colourisation support for it.
I currently hold the following qualifications (amongst others, I also studied Music Technology and Electronics, for my sins)
- MSc (Passed with distinctions), in Information Technology for E-Commerce
- BSc Hons (1st class) in Computer Science & Artificial Intelligence
Both of these at Sussex University UK.
Award(s)
I am lucky enough to have won a few awards for Zany Crazy code articles over the years
- Microsoft C# MVP 2016
- Codeproject MVP 2016
- Microsoft C# MVP 2015
- Codeproject MVP 2015
- Microsoft C# MVP 2014
- Codeproject MVP 2014
- Microsoft C# MVP 2013
- Codeproject MVP 2013
- Microsoft C# MVP 2012
- Codeproject MVP 2012
- Microsoft C# MVP 2011
- Codeproject MVP 2011
- Microsoft C# MVP 2010
- Codeproject MVP 2010
- Microsoft C# MVP 2009
- Codeproject MVP 2009
- Microsoft C# MVP 2008
- Codeproject MVP 2008
- And numerous codeproject awards which you can see over at my blog