On Wed, 9 Feb 2011 13:37:26 +0000, "Zartash ." <[email protected]> wrote: > Dear All,We are blocking urls using url_regex feature (urls are stored in > a file), but we are unable to block urls having special characters (like > complete youtube video links or urls having % sign or ? etc). Can any one > let me know how can we block specific urls (rather then blocking whole > domain)?
To regex match characters which are reserved in regex you need to escape them with \ characters: url_regex http://example.com/\?hello=world matches: http://example.com/?hello=world % are slightly different, in URLs they are used to encode raw binary characters. These are decoded back into binary form for the match. So your pattern wanting to detect a specific one of these should match the binary form. eg. %20 encodes hex binary 0x20 or character value 32 (spacebar). Amos
