If you are using the GET method, you are limited to a maximum of 2,048 characters, minus the number of characters in the actual path.
However, the POST method is not limited by the size of the URL for submitting name/value pairs. These pairs are transferred in the header and not in the URL.
RFC 2616, "Hypertext Transfer Protocol -- HTTP/1.1," does not specify any requirement for URL length.
For more information, see "General Syntax," section 3.2.1 of RFC 2616, "Hypertext Transfer Protocol -- HTTP/1.1," at the following Internet Society Web site:
Article ID: 208427 - Last Review: Sep 15, 2009 - Revision: 1