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What is the maximum length of a URL in apache? Where is it documented, and is it configurable?
I'm implementing an openid identity provider, and would like to know the limitations I'm up against. I know about the 2048 byte path limit on Internet Explorer. That can be handled specially using user agent detection. Other browsers have much higher URL limits.
So what I'm interested in is apache server limits when coding an application.
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The official documentation specifies a maximum length of 2048 characters for the <loc> element, which is used to submit URLs: URL of the page. This URL must begin with the protocol (e.g. “http”) and end with a trailing slash if required by the web server. This value must not exceed 2,048 characters.
URL length The REST API supports Uniform Resource Locators (URLs) with a length of up to 6000 characters. To avoid exceeding this limit, it is important to be aware of URL encoding.
Microsoft states that the maximum length of a URL in Internet Explorer is 2,083 characters, with no more than 2,048 characters in the path portion of the URL.
Chrome limits URLs to a maximum length of 2MB for practical reasons and to avoid causing denial-of-service problems in inter-process communication. On most platforms, Chrome's omnibox limits URL display to 32kB ( kMaxURLDisplayChars ) although a 1kB limit is used on VR platforms.
The default limit for the length of the request line is 8190 bytes (see LimitRequestLine directive). And if we subtract three bytes for the request method (i.e. GET), eight bytes for the version information (i.e. HTTP/1.0/HTTP/1.1) and two bytes for the separating space, we end up with 8177 bytes for the URI path plus query.
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From: http://www.danrigsby.com/blog/index.php/2008/06/17/rest-and-max-url-size/
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