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Refactor a little, but I think I'm going to end up rewriting the whole thing.

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git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@208 48356398-32a2-884e-a903-53898d9a118a
This commit is contained in:
Edward Z. Yang 2006-08-12 02:48:17 +00:00
parent c3c833cc80
commit 5b14310284
1 changed files with 35 additions and 25 deletions
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60
library/HTMLPurifier/AttrDef/URI.php
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@ -16,12 +16,41 @@ class HTMLPurifier_AttrDef_URI extends HTMLPurifier_AttrDef
// while it would be nice to use parse_url(), that's specifically
// for HTTP and thus won't work for our generic URI parsing
// define regexps
$HEXDIG = '[A-Fa-f0-9]';
$unreserved = 'A-Za-z0-9-._~'; // make sure you wrap with []
$sub_delims = '!$&\'()'; // needs []
$pct_encoded = "%$HEXDIG$HEXDIG";
$h16 = "{$HEXDIG}{1,4}";
$dec_octet = '(?:25[0-5]|2[0-4]\d|1\d\d|1\d|[0-9])';
$IPv4address = "$dec_octet.$dec_octet.$dec_octet.$dec_octet";
$ls32 = "(?:$h16:$h16|$IPv4address)";
$IPvFuture = "v$HEXDIG+\.[:$unreserved$sub_delims]+";
$IPv6Address = "(?:".
"(?:$h16:){6}$ls32" .
"|::(?:$h16:){5}$ls32" .
"|(?:$h16)?::(?:$h16:){4}$ls32" .
"|(?:(?:$h16:){1}$h16)?::(?:$h16:){3}$ls32" .
"|(?:(?:$h16:){2}$h16)?::(?:$h16:){2}$ls32" .
"|(?:(?:$h16:){3}$h16)?::(?:$h16:){1}$ls32" .
"|(?:(?:$h16:){4}$h16)?::$ls32" .
"|(?:(?:$h16:){5}$h16)?::$h16" .
"|(?:(?:$h16:){6}$h16)?::" .
")";
$IP_literal = "\[(?:$IPvFuture|$IPv6Address)\]";
// the important regexps, the collide with other names, prefix with r_
$r_userinfo = "(?:[$unreserved$sub_delims:]|$pct_encoded)*";
$r_authority = "/^(($r_userinfo)@)?(\[$IP_literal\]|[^:]*)(:(\d*))?/";
// according to the RFC... (but this cuts corners, i.e. non-validating)
$regexp = '!^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(\?([^#]*))?(#(.*))?!';
$r_URI = '!^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(\?([^#]*))?(#(.*))?!';
// 12 3 4 5 6 7 8 9
$matches = array();
$result = preg_match($regexp, $uri, $matches);
$result = preg_match($r_URI, $uri, $matches);
if (!$result) return ''; // wow, that's very strange
@ -44,38 +73,19 @@ class HTMLPurifier_AttrDef_URI extends HTMLPurifier_AttrDef
// validate authority
$matches = array();
$HEXDIG = '[A-Fa-f0-9]';
$unreserved = 'A-Za-z0-9-._~';
$sub_delims = '!$&\'()';
$h16 = "{$HEXDIG}{1,4}";
$dec_octet = '(?:25[0-5]|2[0-4]\d|1\d\d|1\d|[0-9])';
$IPv4address = "$dec_octet.$dec_octet.$dec_octet.$dec_octet";
$ls32 = "(?:$h16:$h16|$IPv4address)";
$IPvFuture = "v$HEXDIG+\.[:$unreserved$sub_delims]+";
$IPv6Address = "(?:".
"(?:$h16:){6}$ls32" .
"|::(?:$h16:){5}$ls32" .
"|(?:$h16)?::(?:$h16:){4}$ls32" .
"|(?:(?:$h16:){1}$h16)?::(?:$h16:){3}$ls32" .
"|(?:(?:$h16:){2}$h16)?::(?:$h16:){2}$ls32" .
"|(?:(?:$h16:){3}$h16)?::(?:$h16:){1}$ls32" .
"|(?:(?:$h16:){4}$h16)?::$ls32" .
"|(?:(?:$h16:){5}$h16)?::$h16" .
"|(?:(?:$h16:){6}$h16)?::" .
")";
$IP_literal = "\[(?:$IPvFuture|$IPv6Address)\]";
$regexp = "/^(([^@]+)@)?(\[$IP_literal\]|[^:]*)(:(\d*))?/";
preg_match($regexp, $authority, $matches);
// IPv6 is broken
preg_match($r_authority, $authority, $matches);
$userinfo = !empty($matches[1]) ? $matches[2] : null;
$host = !empty($matches[3]) ? $matches[3] : null;
$port = !empty($matches[4]) ? $matches[5] : null;
// validate port
if ($port !== null) {
if (!ctype_digit($port) || $port < 1 || $port > 65535) {
$port = null;
}
}
$authority =
($userinfo === null ? '' : ($userinfo . '@')) .
$host .