I am having issues with javascript files not decompressing in IIS7 and stylesheets not loading properly.
I can fix this issue by turning off Static compression in IIS but this can't be a permanent solution. The issue has suddenly started happening. We haven't changed the code.
The web application is an asp.net web forms app in .net 4. static and dynamic compression was set in IIS. another web forms web application is still running fine with static compression set at the application level.
the server was updated to .net 4.5 framework.
Some of the stylesheets tags are set to runat server as I append a version number to force a reload of the css when its cached and a new version is released.
This issue only happens in Internet Explorer.
I am really stuck on this issue.
The Request
Request GET /webapp/JavaScript/jQuery/js/jquery-1.3.2.min.js HTTP/1.1
Accept text/html, application/xhtml+xml, */*
Accept-Language x-en-GB-zscot
User-Agent Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0)
UA-CPU AMD64
Accept-Encoding gzip, deflate
Host localhost
Connection Keep-Alive
Response Headers
Key Value
Response HTTP/1.1 200 OK
Cache-Control private
Content-Type application/x-javascript
Content-Encoding gzip,gzip
Last-Modified Wed, 10 Oct 2012 15:45:44 GMT
Accept-Ranges bytes
ETag "04f24efea6cd1:0"
Vary Accept-Encoding
Server Microsoft-IIS/7.5
X-Compressed-By HttpCompress
Date Tue, 04 Dec 2012 11:07:13 GMT
Content-Length 19788
Part of the Response Body
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I have narrowed this issue down to the web site using Blowery HttpCompression.
It seems that with .net 4.5 Blowery and IIS no longer play together nicely and the static content seems to be compressed twice, once by Blowery and once by IIS.
The above is a guess but one think I do know is that be removing Blowery the website works fine again.