YUI 3 UploaderFlash not firing 'upload' events

StackOverflow https://stackoverflow.com/questions/10521683

  •  07-06-2021
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Question

I've set up a very simple prototype to test out the YUI Uploader. (flash version) The file is making it to the server which is sending a simple Ajax response. However, the only event being triggered are fileselect and uploadstart. uploadcomplete, uploaderror, and uploadprogress are never triggered. This is with YUI 3.5.1.

HTML and JS

<!DOCTYPE html>
<html>
<head>
    <title>Uploader Bizness</title>
    <script src="http://code.jquery.com/jquery-1.7.2.min.js"></script>
    <script src="http://yui.yahooapis.com/3.5.1/build/yui/yui-min.js"></script>
</head>
<body>
    <div id="upload"></div>
    <div id="progress"></div>
    <script>
        'use strict';
        YUI().use('uploader', 'uploader-flash', function (Y) {
            Y.Uploader = Y.UploaderFlash;
            var uploader = new Y.Uploader({
                width: '150px',
                height: '40px',
                swfURL: '/flashuploader.swf'
            }).render('#upload');

            uploader.on('fileselect', function (G) {
                var firstFile = G.fileList[0];
                uploader.upload(firstFile, 'http://localhost:28107/home/upload', { postvar1: 'foo', postvar2: 'bar' });
            });

            uploader.on('uploadstart', function () {
                console.log('Upload started');
            });

            uploader.on('uploadcomplete', function (e) {
                console.log('Upload completed successfully', e);
            });

            uploader.on('uploaderror', function (e) {
                console.log('Upload error', e);
            });

            uploader.on('uploadprogress', function (file, bytesloaded, bytesTotal, percentLoaded, e) {
                $('#progess').html(percentLoaded);
            });
        });
    </script>
</body>
</html>

Server side code

public JsonResult Upload()
{
    var result = new JsonResult();
    result.Data = new {message = "great success"};
    return result;
}

What am I doing wrong here?

Was it helpful?

Solution

Change

<script src="http://yui.yahooapis.com/3.5.1/build/yui/yui-min.js"></script>

to

<script src="http://yui.yahooapis.com/3.6.0pr2/build/yui/yui-min.js"></script>

and subscribe to the events on the file objects instead of the uploader object:

uploader.on('fileselect', function (G) {
    var firstFile = G.fileList[0];
    firstFile.on('uploadstart', function (event) {
        console.log('Upload started');
        // var file = event.currentTarget;
    });
    uploader.upload(firstFile, 'http://localhost:28107/home/upload', { postvar1: 'foo', postvar2: 'bar' });
});

OTHER TIPS

You probably have a 'same domain policy' problem. The target of the upload should be the same as the source of swfuploader.swf

Your upload target uses port 28107; are your page and the swfuploader.swf served from that same port or the default http port? If not you need to make sure they are or place a crossdomain.xml file on your server. See http://yuilibrary.com/yui/docs/uploader/ for notes on how to write one.

Also note the remark about the Flash bug in IE which you can fix by appending a random parameter to your swfuploader url.

[edit:] I tested your file on my server and although it looks perfectly ok it fails here as well. Even the uploadstart event would not fire at random times. Seems to be a bug in YUI 3.5.1.

Workaround is to use the 3.4.1 uploader using uploader-deprecated. I tested this version and it works:

<script>
'use strict';
YUI().use('uploader-deprecated', function (Y) {

    var uploader = new Y.Uploader({
        boundingBox: '#upload', // use boundingBox attribute instead of render('uploader')
        // width: '150px', set width & height using css 
        // height: '40px',
        swfURL: 'ENTER_PATH/uploader.swf',
        simLimit: 2
    }); // no .render('upload') !

    uploader.on('fileselect', function (G) {
        // var firstFile = G.fileList[0];
        // uploader.upload(firstFile, 'http://localhost:28107/home/upload', { postvar1: 'foo', postvar2: 'bar' });
        uploader.upload('file0', 'http://localhost:28107/stackupload.php', 'POST', { });
    });

    uploader.on('uploadstart', function () {
        console.log('Upload started');
    });

    uploader.on('uploadcomplete', function (e) {
        console.log('Upload completed successfully', e);
    });

    uploader.on('uploaderror', function (e) {
        console.log('Upload error', e);
    });
 /* not tested see below 
    uploader.on('uploadprogress', function (file, bytesloaded, bytesTotal, percentLoaded, e) {
        $('#progess').html(percentLoaded);
    });
*/
});

The event signature for the 'uploadprogress' event is different as well. Code I use:

    uploader.on('uploadprogress', function(event){
        var progress = Math.round(100 * event.bytesLoaded / event.bytesTotal);
        progressBar.set("progress", progress);
    });

You also need to style your button yourself. See http://yuilibrary.com/yui/docs/uploader-deprecated/index.html

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