Whenever I use the following code, the webserver (running IIS 7) refuses to send me content, but sends a "400 Bad Request" instead.

request.setRequestHeader("If-Modified-Since", "Sat, 1 Jan 2000 00:00:00 GMT");

Whenever I use the following code, the webserver (running IIS 7) refuses to send me content, but sends a "400 Bad Request" instead.

request.setRequestHeader("If-Modified-Since", "Sat, 1 Jan 2000 00:00:00 GMT");

• javascript
• iis-7
• xmlhttprequest

1 Answer 1

Apparently many people are having this problem, and it can easily be fixed by prefixing the date with a 0.

request.setRequestHeader("If-Modified-Since", "Sat, 01 Jan 2000 00:00:00 GMT");