remove autoload section in composer.json

[github/wallabag/wallabag.git] / inc / 3rdparty / htmlpurifier / HTMLPurifier / AttrDef / URI / Host.php

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