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authorfriendica <info@friendica.com>2015-01-01 22:18:27 -0800
committerfriendica <info@friendica.com>2015-01-01 22:18:27 -0800
commita0052f0176bd079e6a94baec59fea2ec5a8d651e (patch)
treec323edd823681bc2e8ca757e7eaf8354d42c7b51 /library/HTMLPurifier/AttrDef/URI/Host.php
parent545e47933a0816699c68d98a7742a03260d6a54f (diff)
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htmlpurifier update - compatibility issue with language library autoloader
Diffstat (limited to 'library/HTMLPurifier/AttrDef/URI/Host.php')
-rw-r--r--library/HTMLPurifier/AttrDef/URI/Host.php104
1 files changed, 85 insertions, 19 deletions
diff --git a/library/HTMLPurifier/AttrDef/URI/Host.php b/library/HTMLPurifier/AttrDef/URI/Host.php
index 2156c10c6..e7df800b1 100644
--- a/library/HTMLPurifier/AttrDef/URI/Host.php
+++ b/library/HTMLPurifier/AttrDef/URI/Host.php
@@ -7,56 +7,122 @@ class HTMLPurifier_AttrDef_URI_Host extends HTMLPurifier_AttrDef
{
/**
- * Instance of HTMLPurifier_AttrDef_URI_IPv4 sub-validator
+ * IPv4 sub-validator.
+ * @type HTMLPurifier_AttrDef_URI_IPv4
*/
protected $ipv4;
/**
- * Instance of HTMLPurifier_AttrDef_URI_IPv6 sub-validator
+ * IPv6 sub-validator.
+ * @type HTMLPurifier_AttrDef_URI_IPv6
*/
protected $ipv6;
- public function __construct() {
+ public function __construct()
+ {
$this->ipv4 = new HTMLPurifier_AttrDef_URI_IPv4();
$this->ipv6 = new HTMLPurifier_AttrDef_URI_IPv6();
}
- public function validate($string, $config, $context) {
+ /**
+ * @param string $string
+ * @param HTMLPurifier_Config $config
+ * @param HTMLPurifier_Context $context
+ * @return bool|string
+ */
+ public function validate($string, $config, $context)
+ {
$length = strlen($string);
- if ($string === '') return '';
- if ($length > 1 && $string[0] === '[' && $string[$length-1] === ']') {
+ // empty hostname is OK; it's usually semantically equivalent:
+ // the default host as defined by a URI scheme is used:
+ //
+ // If the URI scheme defines a default for host, then that
+ // default applies when the host subcomponent is undefined
+ // or when the registered name is empty (zero length).
+ if ($string === '') {
+ return '';
+ }
+ if ($length > 1 && $string[0] === '[' && $string[$length - 1] === ']') {
//IPv6
$ip = substr($string, 1, $length - 2);
$valid = $this->ipv6->validate($ip, $config, $context);
- if ($valid === false) return false;
- return '['. $valid . ']';
+ if ($valid === false) {
+ return false;
+ }
+ return '[' . $valid . ']';
}
// need to do checks on unusual encodings too
$ipv4 = $this->ipv4->validate($string, $config, $context);
- if ($ipv4 !== false) return $ipv4;
+ if ($ipv4 !== false) {
+ return $ipv4;
+ }
// A regular domain name.
- // This breaks I18N domain names, but we don't have proper IRI support,
- // so force users to insert Punycode. If there's complaining we'll
- // try to fix things into an international friendly form.
+ // This doesn't match I18N domain names, but we don't have proper IRI support,
+ // so force users to insert Punycode.
+
+ // There is not a good sense in which underscores should be
+ // allowed, since it's technically not! (And if you go as
+ // far to allow everything as specified by the DNS spec...
+ // well, that's literally everything, modulo some space limits
+ // for the components and the overall name (which, by the way,
+ // we are NOT checking!). So we (arbitrarily) decide this:
+ // let's allow underscores wherever we would have allowed
+ // hyphens, if they are enabled. This is a pretty good match
+ // for browser behavior, for example, a large number of browsers
+ // cannot handle foo_.example.com, but foo_bar.example.com is
+ // fairly well supported.
+ $underscore = $config->get('Core.AllowHostnameUnderscore') ? '_' : '';
// The productions describing this are:
$a = '[a-z]'; // alpha
$an = '[a-z0-9]'; // alphanum
- $and = '[a-z0-9-]'; // alphanum | "-"
+ $and = "[a-z0-9-$underscore]"; // alphanum | "-"
// domainlabel = alphanum | alphanum *( alphanum | "-" ) alphanum
- $domainlabel = "$an($and*$an)?";
+ $domainlabel = "$an($and*$an)?";
// toplabel = alpha | alpha *( alphanum | "-" ) alphanum
- $toplabel = "$a($and*$an)?";
+ $toplabel = "$a($and*$an)?";
// hostname = *( domainlabel "." ) toplabel [ "." ]
- $match = preg_match("/^($domainlabel\.)*$toplabel\.?$/i", $string);
- if (!$match) return false;
+ if (preg_match("/^($domainlabel\.)*$toplabel\.?$/i", $string)) {
+ return $string;
+ }
- return $string;
- }
+ // If we have Net_IDNA2 support, we can support IRIs by
+ // punycoding them. (This is the most portable thing to do,
+ // since otherwise we have to assume browsers support
+ if ($config->get('Core.EnableIDNA')) {
+ $idna = new Net_IDNA2(array('encoding' => 'utf8', 'overlong' => false, 'strict' => true));
+ // we need to encode each period separately
+ $parts = explode('.', $string);
+ try {
+ $new_parts = array();
+ foreach ($parts as $part) {
+ $encodable = false;
+ for ($i = 0, $c = strlen($part); $i < $c; $i++) {
+ if (ord($part[$i]) > 0x7a) {
+ $encodable = true;
+ break;
+ }
+ }
+ if (!$encodable) {
+ $new_parts[] = $part;
+ } else {
+ $new_parts[] = $idna->encode($part);
+ }
+ }
+ $string = implode('.', $new_parts);
+ if (preg_match("/^($domainlabel\.)*$toplabel\.?$/i", $string)) {
+ return $string;
+ }
+ } catch (Exception $e) {
+ // XXX error reporting
+ }
+ }
+ return false;
+ }
}
// vim: et sw=4 sts=4