Question

I am using valums ajax-upload together with a ashx handler to let users upload files in the webapp Im developing. All is working absolutely fine for about 95% (around 3000) of the users.

For the last about 5% I get reports that the upload never finish, the wheel just keeps spinning people say. It seems that those who get this error are all are using IE9.0.

I have tested on all the IE9.0 I can come across but still have not been able to reproduce the error. I also have tried to log all thinkable errors but still no luck.

Please, can anyone reproduce the problem and hopefully give me a JavaScript console error transcript if any. To test go to step 2 (Upload section) and try to upload a small text file:

https://jobmatchprofile.com/backend/login.aspx?auto_login=24G3FY

UPDATE

I have been in contact with a user who experienced this problem. The error message can be seen here. It is in danish and says: “SCRIPT5 Access denied”.

Error message

What is strange is that the user had same IE version as is working for others (me for example): I have been testing on: 9.0.8112.16421 and also ran WIN7 (as I). The Product-id differs however and he had a danish version where I have the US version.

UPDATE II

I was finally able to reproduce this error. I know this sounds a little strange, but belive me it is true: when opening the page via a link sent to my gmail account I get the same error. The user from first Update also used gmail to open the page.

Answer 1

Your reference to Gmail, specifically, points in the direction of a solution: Gmail strips the referrer data from the HTTP headers when you click on a link within an e-mail, except when you use your right mouse button and select “Open in New Tab [or Window]”, presumably because this prevents their code from intercepting the headers. Is your script checking for a valid HTTP REFERRER, by any chance?

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Are you making any cross-(sub)domain or cross-protocol AJAX calls? If so, then you may have to proxy the request(s). Consider the following solutions from the Yahoo! Developer Network:
http://developer.yahoo.com/javascript/howto-proxy.html

See also:

• SCRIPT5: Access is denied in IE9 on xmlhttprequest
• Access denied to jQuery script on IE
• "Access is denied" JavaScript error when trying to access the document object of a programmatically-created <iframe> (IE-only)

(Un)fortunately, I wasn’t able to reproduce the error in IE9, v. 9.0.8112.16421 (although I did get a general on-site error when trying to upload an empty .txt file, but this seems wholly unrelated).