Version 2.0.2 Intermittent non-responsiveness

I wish I could provide detailed steps to reproduce this problem, but I'm not entirely sure yet how to reliably reproduce it. However, I'll give it my best shot. Keep in mind that I have encountered this bug on both the demo page and my own install.

On occasion, in various browsers (chrome, IE, FF, Safari) in both Mac and Windows systems, the client code will not act on the server's response. This has been true for both valid file uploads as well as invalid uploads. Refreshing the page will cause the tool to work again, but this is not acceptable for production use (as someone can submit the same file 6 times before they realize that it's a bug and refresh the page or give up and come back later, only to realize that it did, in fact, upload several times).

1) Open a folder you can upload to.
2) Click (+Upload).
3) Choose a file and click submit.
4) With an HTTP proxy such as Fiddler, notice that a proper response has been sent from the server. In this particular instance, it was too big.

HTTP/1.1 200 OK
Date: Tue, 29 Mar 2011 18:16:43 GMT
Server: Apache
X-Powered-By: PHP/5.2.8
Cache-Control: max-age=1
Expires: Tue, 29 Mar 2011 18:16:44 GMT
Vary: Accept-Encoding
Content-Length: 120
Keep-Alive: timeout=5, max=100
Connection: Keep-Alive
Content-Type: text/html; charset=utf-8

<script type="text/javascript">window.parent.OnUploadCompleted('', 'Invalid file. The file size is too big.') ;</script>

Tue, 03/29/2011 - 20:23

dzdrazil

Joined: 29/03/2011

Posts: 3

Re: Version 2.0.2 Intermittent non-responsiveness

I should note that the actual response from the server did not have any line breaks, line feed or return characters- the html and javascript were all on one line. The line break in the code block above is purely formatting from the forum.

Fri, 04/08/2011 - 10:56

wiktor

Joined: 16/07/2007

Posts: 1641

Re: Version 2.0.2 Intermittent non-responsiveness

@dzdrazil - just to track down this error better - does it happen when uploading large files on a slow network connection?

Wiktor Walc
CTO, CKSource - http://cksource.com
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Sun, 04/10/2011 - 22:20

dzdrazil

Joined: 29/03/2011

Posts: 3

Re: Version 2.0.2 Intermittent non-responsiveness

From my own experience, it had happened twice- once, I know the image was small enough to be uploaded to the demo site, but I didn't have Fiddler open to verify that the server had actually responded correctly- I believe that image was roughly 480Kb. The image I used in the example above was roughly 5mb. Both instances were on a high speed connection using Chrome > 10.0 in Windows 7.
That being said, I do know of two instances where our end client ran into the same problem, using IE 8 (and possibly safari 4.04 or 5+ as well). In these instances, the connection would have been in a corporate setting, so most likely high speed but with some latency.