Sometimes file upload doesn't work on IE9

Question

I use valums ajax-upload along with the ashx handler so that users can upload files to webapp Im. Everything works absolutely fine, about 95% (about 3000) of users.

Over the past about 5%, I get reports that the download never ends, the wheel just holds on, people say. It seems that those who get this error all use IE9.0.

I tested all IE9.0 that I came across, but still could not reproduce the error. I also tried to log all conceivable errors, but still no luck.

Please, can someone reproduce the problem and hopefully give me a JavaScript console error script, if any. To verify, go to step 2 (section "Download") and try downloading a small text file:

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

UPDATE

I was 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

It is strange that the user had the same version of IE as for others (I for example): I tested: 9.0.8112.16421, and also started WIN7 (like me). The product identifier is different, however, and it had a Danish version where I have an American version.

UPDATE II

Finally, I was able to reproduce this error. I know this sounds a little strange, but believe me it’s true: when I open the page using the link sent to my gmail account, I get the same error. The user from the first Refresh also used gmail to open the page.

Answer 1

Your Gmail link, in particular, points to a solution: Gmail removes referrer data from HTTP headers when you click on a link in an email, unless you use the right mouse button and select "Open in new tab [or window] ", presumably because it prevents capturing the headers. Is your script checking for valid HTTP REFERRER, by chance?

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

See also:

• SCRIPT5: Access Denied in IE9 at xmlhttprequest
• Access denied jQuery script in IE
• "Access denied" JavaScript error when trying to access a document object programmatically created by <iframe> (IE only)

(Un), fortunately, I could not reproduce the error in IE9, v. 9.0.8112.16421 (although I got a general error in place when I tried to load an empty .txt file, but it seems completely unrelated).

Answer 2

Even if you are sure that this is due to the fact that the user clicked the anchor in the letter, I would say this because of the policy settings in Internet Explorer. I have seen errors like these before, and noticed that the most common errors are related to Internet Explorer user policies in a corporate environment.

Answer 3

The solution for ie9 just loads using https :

https://www.parse.com/questions/internet-explorer-and-the-javascript-sdk