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[2.1.0] Refactor AttrDef_URI: removed URIParser functionality

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- Genericized flush-definition-cache script

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@1333 48356398-32a2-884e-a903-53898d9a118a
This commit is contained in:
Edward Z. Yang
2007-08-01 14:55:09 +00:00
parent 2a002857ce
commit 8c9dbe142d
8 changed files with 237 additions and 206 deletions
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106
library/HTMLPurifier/AttrDef/URI.php
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@@ -1,6 +1,7 @@
<?php
require_once 'HTMLPurifier/AttrDef.php';
require_once 'HTMLPurifier/URIParser.php';
require_once 'HTMLPurifier/URIScheme.php';
require_once 'HTMLPurifier/URISchemeRegistry.php';
require_once 'HTMLPurifier/AttrDef/URI/Host.php';
@@ -92,7 +93,7 @@ HTMLPurifier_ConfigSchema::defineAlias('Attr', 'DisableURI', 'URI', 'Disable');
class HTMLPurifier_AttrDef_URI extends HTMLPurifier_AttrDef
{
var $host;
var $host, $parser;
var $embeds_resource;
/**
@@ -100,6 +101,7 @@ class HTMLPurifier_AttrDef_URI extends HTMLPurifier_AttrDef
*/
function HTMLPurifier_AttrDef_URI($embeds_resource = false) {
$this->host = new HTMLPurifier_AttrDef_URI_Host();
$this->parser = new HTMLPurifier_URIParser();
$this->embeds_resource = (bool) $embeds_resource;
}
@@ -108,43 +110,18 @@ class HTMLPurifier_AttrDef_URI extends HTMLPurifier_AttrDef
static $PercentEncoder = null;
if ($PercentEncoder === null) $PercentEncoder = new HTMLPurifier_PercentEncoder();
// We'll write stack-based parsers later, for now, use regexps to
// get things working as fast as possible (irony)
if ($config->get('URI', 'Disable')) return false;
// parse as CDATA
// initial operations
$uri = $this->parseCDATA($uri);
// fix up percent-encoding
$uri = $PercentEncoder->normalize($uri);
// while it would be nice to use parse_url(), that's specifically
// for HTTP and thus won't work for our generic URI parsing
// according to the RFC... (but this cuts corners, i.e. non-validating)
$r_URI = '!'.
'(([^:/?#<>\'"]+):)?'. // 2. Scheme
'(//([^/?#<>\'"]*))?'. // 4. Authority
'([^?#<>\'"]*)'. // 5. Path
'(\?([^#<>\'"]*))?'. // 7. Query
'(#([^<>\'"]*))?'. // 8. Fragment
'!';
$matches = array();
$result = preg_match($r_URI, $uri, $matches);
if (!$result) return false; // *really* invalid URI
// seperate out parts
$scheme = !empty($matches[1]) ? $matches[2] : null;
$authority = !empty($matches[3]) ? $matches[4] : null;
$path = $matches[5]; // always present, can be empty
$query = !empty($matches[6]) ? $matches[7] : null;
$fragment = !empty($matches[8]) ? $matches[9] : null;
// parse the URI
$parsed_uri = $this->parser->parse($uri);
if ($parsed_uri === false) return false;
list($scheme, $userinfo, $host, $port, $path, $query, $fragment) = $parsed_uri;
// retrieve the scheme object
$registry =& HTMLPurifier_URISchemeRegistry::instance();
$default_scheme = $config->get('URI', 'DefaultScheme');
if ($scheme !== null) {
@@ -154,31 +131,25 @@ class HTMLPurifier_AttrDef_URI extends HTMLPurifier_AttrDef
$scheme_obj = $registry->getScheme($scheme, $config, $context);
if (!$scheme_obj) return false; // invalid scheme, clean it out
} else {
$scheme_obj = $registry->getScheme(
$default_scheme, $config, $context
);
// no scheme: retrieve the default one
$scheme_obj = $registry->getScheme($default_scheme, $config, $context);
if (!$scheme_obj) {
// something funky happened to the default scheme object
trigger_error(
'Default scheme object "' . $config->get('URI', 'DefaultScheme') . '" was not readable',
E_USER_WARNING
);
return false;
}
}
// something funky weird happened in the registry, abort!
if (!$scheme_obj) {
trigger_error(
'Default scheme object "' . $config->get('URI', 'DefaultScheme') . '" was not readable',
E_USER_WARNING
);
return false;
}
// the URI we're processing embeds_resource a resource in the page, but the URI
// it references cannot be located
if ($this->embeds_resource && !$scheme_obj->browsable) {
// the URI we're processing embeds_resource a resource in the
// page, but the URI it references cannot be physically retrieved
return false;
}
if ($authority !== null) {
// ridiculously inefficient
// validate host
if ($host !== null) {
// remove URI if it's absolute and we disabled externals or
// if it's absolute and embedded and we disabled external resources
unset($our_host);
@@ -192,29 +163,10 @@ class HTMLPurifier_AttrDef_URI extends HTMLPurifier_AttrDef
$our_host = $config->get('URI', 'Host');
if ($our_host === null) return false;
}
$HEXDIG = '[A-Fa-f0-9]';
$unreserved = 'A-Za-z0-9-._~'; // make sure you wrap with []
$sub_delims = '!$&\'()'; // needs []
$pct_encoded = "%$HEXDIG$HEXDIG";
$r_userinfo = "(?:[$unreserved$sub_delims:]|$pct_encoded)*";
$r_authority = "/^(($r_userinfo)@)?(\[[^\]]+\]|[^:]*)(:(\d*))?/";
$matches = array();
preg_match($r_authority, $authority, $matches);
// overloads regexp!
$userinfo = !empty($matches[1]) ? $matches[2] : null;
$host = !empty($matches[3]) ? $matches[3] : null;
$port = !empty($matches[4]) ? $matches[5] : null;
// validate port
if ($port !== null) {
$port = (int) $port;
if ($port < 1 || $port > 65535) $port = null;
}
$host = $this->host->validate($host, $config, $context);
if ($host === false) $host = null;
// check host against blacklist
if ($this->checkBlacklist($host, $config, $context)) return false;
// more lenient absolute checking
@@ -227,11 +179,11 @@ class HTMLPurifier_AttrDef_URI extends HTMLPurifier_AttrDef
if ($host_parts[$i] != $our_host_parts[$i]) return false;
}
}
// userinfo and host are validated within the regexp
} else {
$port = $host = $userinfo = null;
}
// validate port
if ($port !== null) {
if ($port < 1 || $port > 65535) $port = null;
}