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Friday, October 02, 2009 10:55 PM

Internet Explorer Cannot Download https://something

Earlier today, I was asked to troubleshoot a secure site where file downloads were always failing. Having seen this problem many times often over the years, I immediately suspected that the web developer wasn’t aware that if a user tries to download *
Posted by EricLaw | 14 Comments
Thursday, July 23, 2009 2:32 AM

IE8's Native XMLHttpRequest Object Restrictions, Bugs, and Notes

Protocol Restriction Internet Explorer's native XMLHTTPRequest object permits requests to HTTP and HTTPS only; requests to FILE, FTP, or other URI schemes are blocked. Method Restriction The object permits only the following HTTP methods: "GET", "POST",
Posted by EricLaw | 5 Comments
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Monday, July 20, 2009 3:52 PM

Internet Explorer's Cache-Control Extensions

Some time ago, I wrote a summary of how Internet Explorer’s cache works . At the time, I left out mention of the two cache-control directives introduced by IE5: pre-check and post-check . These directives enable a “background update” mechanism where a
Posted by EricLaw | 2 Comments
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Wednesday, June 17, 2009 6:31 PM

Vary with Care

This content was previously published elsewhere . I'm copying it here for broader visibility. About the Vary Response Header As described in the HTTP/1.1 specification ( RFC2616 ), the Vary response header allows a cache to determine if a cached (still
Posted by EricLaw | 8 Comments
 
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