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POWhy my aspx page is being requested from cache on my dev machine only
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Ok - so I am testing a web application and am getting some strange behaviour on my development box that I can't work out. The same behaviour is not exhibited on a colleagues machine. The issue is as follows: I am making two requests to index.aspx. The first request comes back as a HTTP 200 (as I would expect), but the second request is retrieved from browser cache. I am clearing the cache at the start of each test to ensure the tests are consistent. I am also using a utility called HTTPWatch (a lot like fiddler, but shows requests even if they are retrieved from browser cache) which shows me HTTP information and this is how I know it is coming from the cache. The issue only occurs on one of my machines. Colleagues Machine (Works fine) <ul> <li>Request is sent to index.aspx <ul> <li>Headers Sent: <ul> <li>(Request-Line): GET /index.aspx HTTP/1.1</li> <li>Accept: text/html, application/xhtml+xml, /</li> <li>Accept-Encoding: gzip, deflate</li> <li>Accept-Language: en-GB</li> <li>Connection: Keep-Alive</li> <li>Cookie: (Not relevant)</li> <li>Host: dev</li> <li>User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)</li> </ul></li> <li>Headers received: <ul> <li>(Status-Line): HTTP/1.1 200 OK</li> <li>Cache-Control: private</li> <li>Content-Length: 10369</li> <li>Content-Type: text/html; charset=utf-8</li> <li>Date: Wed, 08 Feb 2012 09:09:38 GMT</li> <li>Server: Microsoft-IIS/7.5</li> <li>X-AspNet-Version: 2.0.50727</li> <li>X-Powered-By: ASP.NET</li> </ul></li> </ul></li> <li>Second Request Sent to index.aspx <ul> <li>Headers Sent: <ul> <li>(Request-Line): GET /index.aspx HTTP/1.1</li> <li>Accept: text/html, application/xhtml+xml, /</li> <li>Accept-Encoding: gzip, deflate</li> <li>Accept-Language: en-GB</li> <li>Connection: Keep-Alive</li> <li>Cookie: (Not relevant)</li> <li>Host: dev</li> <li>Referer: <a href="http://dev/index.aspx" rel="nofollow">http://dev/index.aspx</a></li> <li>User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)</li> </ul></li> <li>Headers received: <ul> <li>(Status-Line): HTTP/1.1 200 OK</li> <li>Cache-Control: private</li> <li>Content-Length: 33588</li> <li>Content-Type: text/html; charset=utf-8</li> <li>Date: Wed, 08 Feb 2012 09:09:38 GMT</li> <li>Server: Microsoft-IIS/7.5</li> <li>X-AspNet-Version: 2.0.50727</li> <li>X-Powered-By: ASP.NET</li> </ul></li> </ul></li> </ul> My Machine (Doesn't work) <ul> <li>Request is sent to index.aspx <ul> <li>Headers Sent: <ul> <li>(Request-Line): GET /index.aspx HTTP/1.1</li> <li>Accept: application/x-ms-application, image/jpeg, application/xaml+xml, image/gif, image/pjpeg, application/x-ms-xbap, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, /</li> <li>Accept-Encoding: gzip, deflate</li> <li>Accept-Language: en-GB</li> <li>Connection: Keep-Alive</li> <li>Cookie: (Not relevant)</li> <li>Host: dev</li> <li>User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E)</li> </ul></li> <li>Headers received: <ul> <li>(Status-Line): HTTP/1.1 200 OK</li> <li>Cache-Control: private</li> <li>Content-Length: 10374</li> <li>Content-Type: text/html; charset=utf-8</li> <li>Date: Wed, 08 Feb 2012 09:45:304GMT</li> <li>X-Powered-By: ASP.NET</li> </ul></li> </ul></li> <li>Second Request Sent to index.aspx <ul> <li>Headers Sent: <ul> <li>(None): No Headers sent for cached items</li> </ul></li> <li>Headers received: <ul> <li>(None): No headers received for cached items</li> </ul></li> </ul></li> </ul> As you may have noticed, the browsers are different (ie8 to ie9), but I still can't see why this would be an issue. I think it must be some browser configuration as the headers received on the first request are virtually the same. If anyone can explain why the second request is being retrieved from cache, I would be very grateful.
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<internet-explorer><caching><browser><http-headers><cache-control>
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Why my aspx page is being requested from cache on my dev machine only
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