Added PEAR Services/oEmbed and its dependencies for multimedia integration.

1 files changed, 813 insertions, 0 deletions

diff --git a/extlib/Net/URL2.php b/extlib/Net/URL2.php
new file mode 100644
index 000000000..7a654aed8
--- /dev/null
+++ b/extlib/Net/URL2.php
@@ -0,0 +1,813 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | Copyright (c) 2007-2008, Christian Schmidt, Peytz & Co. A/S           |
+// | All rights reserved.                                                  |
+// |                                                                       |
+// | Redistribution and use in source and binary forms, with or without    |
+// | modification, are permitted provided that the following conditions    |
+// | are met:                                                              |
+// |                                                                       |
+// | o Redistributions of source code must retain the above copyright      |
+// |   notice, this list of conditions and the following disclaimer.       |
+// | o Redistributions in binary form must reproduce the above copyright   |
+// |   notice, this list of conditions and the following disclaimer in the |
+// |   documentation and/or other materials provided with the distribution.|
+// | o The names of the authors may not be used to endorse or promote      |
+// |   products derived from this software without specific prior written  |
+// |   permission.                                                         |
+// |                                                                       |
+// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS   |
+// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT     |
+// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
+// | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT  |
+// | OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
+// | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT      |
+// | LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
+// | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
+// | THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT   |
+// | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
+// | OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  |
+// |                                                                       |
+// +-----------------------------------------------------------------------+
+// | Author: Christian Schmidt <schmidt at php dot net>                    |
+// +-----------------------------------------------------------------------+
+//
+// $Id: URL2.php,v 1.10 2008/04/26 21:57:08 schmidt Exp $
+//
+// Net_URL2 Class (PHP5 Only)
+
+// This code is released under the BSD License - http://www.opensource.org/licenses/bsd-license.php
+/**
+ * @license BSD License
+ */
+class Net_URL2
+{
+    /**
+     * Do strict parsing in resolve() (see RFC 3986, section 5.2.2). Default
+     * is true.
+     */
+    const OPTION_STRICT           = 'strict';
+
+    /**
+     * Represent arrays in query using PHP's [] notation. Default is true.
+     */
+    const OPTION_USE_BRACKETS     = 'use_brackets';
+
+    /**
+     * URL-encode query variable keys. Default is true.
+     */
+    const OPTION_ENCODE_KEYS      = 'encode_keys';
+
+    /**
+     * Query variable separators when parsing the query string. Every character
+     * is considered a separator. Default is specified by the
+     * arg_separator.input php.ini setting (this defaults to "&").
+     */
+    const OPTION_SEPARATOR_INPUT  = 'input_separator';
+
+    /**
+     * Query variable separator used when generating the query string. Default
+     * is specified by the arg_separator.output php.ini setting (this defaults
+     * to "&").
+     */
+    const OPTION_SEPARATOR_OUTPUT = 'output_separator';
+
+    /**
+     * Default options corresponds to how PHP handles $_GET.
+     */
+    private $options = array(
+        self::OPTION_STRICT           => true,
+        self::OPTION_USE_BRACKETS     => true,
+        self::OPTION_ENCODE_KEYS      => true,
+        self::OPTION_SEPARATOR_INPUT  => 'x&',
+        self::OPTION_SEPARATOR_OUTPUT => 'x&',
+        );
+
+    /**
+     * @var  string|bool
+     */
+    private $scheme = false;
+
+    /**
+     * @var  string|bool
+     */
+    private $userinfo = false;
+
+    /**
+     * @var  string|bool
+     */
+    private $host = false;
+
+    /**
+     * @var  int|bool
+     */
+    private $port = false;
+
+    /**
+     * @var  string
+     */
+    private $path = '';
+
+    /**
+     * @var  string|bool
+     */
+    private $query = false;
+
+    /**
+     * @var  string|bool
+     */
+    private $fragment = false;
+
+    /**
+     * @param string $url     an absolute or relative URL
+     * @param array  $options
+     */
+    public function __construct($url, $options = null)
+    {
+        $this->setOption(self::OPTION_SEPARATOR_INPUT,
+                         ini_get('arg_separator.input'));
+        $this->setOption(self::OPTION_SEPARATOR_OUTPUT,
+                         ini_get('arg_separator.output'));
+        if (is_array($options)) {
+            foreach ($options as $optionName => $value) {
+                $this->setOption($optionName);
+            }
+        }
+
+        if (preg_match('@^([a-z][a-z0-9.+-]*):@i', $url, $reg)) {
+            $this->scheme = $reg[1];
+            $url = substr($url, strlen($reg[0]));
+        }
+
+        if (preg_match('@^//([^/#?]+)@', $url, $reg)) {
+            $this->setAuthority($reg[1]);
+            $url = substr($url, strlen($reg[0]));
+        }
+
+        $i = strcspn($url, '?#');
+        $this->path = substr($url, 0, $i);
+        $url = substr($url, $i);
+
+        if (preg_match('@^\?([^#]*)@', $url, $reg)) {
+            $this->query = $reg[1];
+            $url = substr($url, strlen($reg[0]));
+        }
+
+        if ($url) {
+            $this->fragment = substr($url, 1);
+        }
+    }
+
+    /**
+     * Returns the scheme, e.g. "http" or "urn", or false if there is no
+     * scheme specified, i.e. if this is a relative URL.
+     *
+     * @return  string|bool
+     */
+    public function getScheme()
+    {
+        return $this->scheme;
+    }
+
+    /**
+     * @param string|bool $scheme
+     *
+     * @return void
+     * @see    getScheme()
+     */
+    public function setScheme($scheme)
+    {
+        $this->scheme = $scheme;
+    }
+
+    /**
+     * Returns the user part of the userinfo part (the part preceding the first
+     *  ":"), or false if there is no userinfo part.
+     *
+     * @return  string|bool
+     */
+    public function getUser()
+    {
+        return $this->userinfo !== false ? preg_replace('@:.*$@', '', $this->userinfo) : false;
+    }
+
+    /**
+     * Returns the password part of the userinfo part (the part after the first
+     *  ":"), or false if there is no userinfo part (i.e. the URL does not
+     * contain "@" in front of the hostname) or the userinfo part does not
+     * contain ":".
+     *
+     * @return  string|bool
+     */
+    public function getPassword()
+    {
+        return $this->userinfo !== false ? substr(strstr($this->userinfo, ':'), 1) : false;
+    }
+
+    /**
+     * Returns the userinfo part, or false if there is none, i.e. if the
+     * authority part does not contain "@".
+     *
+     * @return  string|bool
+     */
+    public function getUserinfo()
+    {
+        return $this->userinfo;
+    }
+
+    /**
+     * Sets the userinfo part. If two arguments are passed, they are combined
+     * in the userinfo part as username ":" password.
+     *
+     * @param string|bool $userinfo userinfo or username
+     * @param string|bool $password
+     *
+     * @return void
+     */
+    public function setUserinfo($userinfo, $password = false)
+    {
+        $this->userinfo = $userinfo;
+        if ($password !== false) {
+            $this->userinfo .= ':' . $password;
+        }
+    }
+
+    /**
+     * Returns the host part, or false if there is no authority part, e.g.
+     * relative URLs.
+     *
+     * @return  string|bool
+     */
+    public function getHost()
+    {
+        return $this->host;
+    }
+
+    /**
+     * @param string|bool $host
+     *
+     * @return void
+     */
+    public function setHost($host)
+    {
+        $this->host = $host;
+    }
+
+    /**
+     * Returns the port number, or false if there is no port number specified,
+     * i.e. if the default port is to be used.
+     *
+     * @return  int|bool
+     */
+    public function getPort()
+    {
+        return $this->port;
+    }
+
+    /**
+     * @param int|bool $port
+     *
+     * @return void
+     */
+    public function setPort($port)
+    {
+        $this->port = intval($port);
+    }
+
+    /**
+     * Returns the authority part, i.e. [ userinfo "@" ] host [ ":" port ], or
+     * false if there is no authority none.
+     *
+     * @return string|bool
+     */
+    public function getAuthority()
+    {
+        if (!$this->host) {
+            return false;
+        }
+
+        $authority = '';
+
+        if ($this->userinfo !== false) {
+            $authority .= $this->userinfo . '@';
+        }
+
+        $authority .= $this->host;
+
+        if ($this->port !== false) {
+            $authority .= ':' . $this->port;
+        }
+
+        return $authority;
+    }
+
+    /**
+     * @param string|false $authority
+     *
+     * @return void
+     */
+    public function setAuthority($authority)
+    {
+        $this->user = false;
+        $this->pass = false;
+        $this->host = false;
+        $this->port = false;
+        if (preg_match('@^(([^\@]+)\@)?([^:]+)(:(\d*))?$@', $authority, $reg)) {
+            if ($reg[1]) {
+                $this->userinfo = $reg[2];
+            }
+
+            $this->host = $reg[3];
+            if (isset($reg[5])) {
+                $this->port = intval($reg[5]);
+            }
+        }
+    }
+
+    /**
+     * Returns the path part (possibly an empty string).
+     *
+     * @return string
+     */
+    public function getPath()
+    {
+        return $this->path;
+    }
+
+    /**
+     * @param string $path
+     *
+     * @return void
+     */
+    public function setPath($path)
+    {
+        $this->path = $path;
+    }
+
+    /**
+     * Returns the query string (excluding the leading "?"), or false if "?"
+     * isn't present in the URL.
+     *
+     * @return  string|bool
+     * @see     self::getQueryVariables()
+     */
+    public function getQuery()
+    {
+        return $this->query;
+    }
+
+    /**
+     * @param string|bool $query
+     *
+     * @return void
+     * @see   self::setQueryVariables()
+     */
+    public function setQuery($query)
+    {
+        $this->query = $query;
+    }
+
+    /**
+     * Returns the fragment name, or false if "#" isn't present in the URL.
+     *
+     * @return  string|bool
+     */
+    public function getFragment()
+    {
+        return $this->fragment;
+    }
+
+    /**
+     * @param string|bool $fragment
+     *
+     * @return void
+     */
+    public function setFragment($fragment)
+    {
+        $this->fragment = $fragment;
+    }
+
+    /**
+     * Returns the query string like an array as the variables would appear in
+     * $_GET in a PHP script.
+     *
+     * @return  array
+     */
+    public function getQueryVariables()
+    {
+        $pattern = '/[' .
+                   preg_quote($this->getOption(self::OPTION_SEPARATOR_INPUT), '/') .
+                   ']/';
+        $parts   = preg_split($pattern, $this->query, -1, PREG_SPLIT_NO_EMPTY);
+        $return  = array();
+
+        foreach ($parts as $part) {
+            if (strpos($part, '=') !== false) {
+                list($key, $value) = explode('=', $part, 2);
+            } else {
+                $key   = $part;
+                $value = null;
+            }
+
+            if ($this->getOption(self::OPTION_ENCODE_KEYS)) {
+                $key = rawurldecode($key);
+            }
+            $value = rawurldecode($value);
+
+            if ($this->getOption(self::OPTION_USE_BRACKETS) &&
+                preg_match('#^(.*)\[([0-9a-z_-]*)\]#i', $key, $matches)) {
+
+                $key = $matches[1];
+                $idx = $matches[2];
+
+                // Ensure is an array
+                if (empty($return[$key]) || !is_array($return[$key])) {
+                    $return[$key] = array();
+                }
+
+                // Add data
+                if ($idx === '') {
+                    $return[$key][] = $value;
+                } else {
+                    $return[$key][$idx] = $value;
+                }
+            } elseif (!$this->getOption(self::OPTION_USE_BRACKETS)
+                      && !empty($return[$key])
+            ) {
+                $return[$key]   = (array) $return[$key];
+                $return[$key][] = $value;
+            } else {
+                $return[$key] = $value;
+            }
+        }
+
+        return $return;
+    }
+
+    /**
+     * @param array $array (name => value) array
+     *
+     * @return void
+     */
+    public function setQueryVariables(array $array)
+    {
+        if (!$array) {
+            $this->query = false;
+        } else {
+            foreach ($array as $name => $value) {
+                if ($this->getOption(self::OPTION_ENCODE_KEYS)) {
+                    $name = rawurlencode($name);
+                }
+
+                if (is_array($value)) {
+                    foreach ($value as $k => $v) {
+                        $parts[] = $this->getOption(self::OPTION_USE_BRACKETS)
+                            ? sprintf('%s[%s]=%s', $name, $k, $v)
+                            : ($name . '=' . $v);
+                    }
+                } elseif (!is_null($value)) {
+                    $parts[] = $name . '=' . $value;
+                } else {
+                    $parts[] = $name;
+                }
+            }
+            $this->query = implode($this->getOption(self::OPTION_SEPARATOR_OUTPUT),
+                                   $parts);
+        }
+    }
+
+    /**
+     * @param string $name
+     * @param mixed  $value
+     *
+     * @return  array
+     */
+    public function setQueryVariable($name, $value)
+    {
+        $array = $this->getQueryVariables();
+        $array[$name] = $value;
+        $this->setQueryVariables($array);
+    }
+
+    /**
+     * @param string $name
+     *
+     * @return void
+     */
+    public function unsetQueryVariable($name)
+    {
+        $array = $this->getQueryVariables();
+        unset($array[$name]);
+        $this->setQueryVariables($array);
+    }
+
+    /**
+     * Returns a string representation of this URL.
+     *
+     * @return  string
+     */
+    public function getURL()
+    {
+        // See RFC 3986, section 5.3
+        $url = "";
+
+        if ($this->scheme !== false) {
+            $url .= $this->scheme . ':';
+        }
+
+        $authority = $this->getAuthority();
+        if ($authority !== false) {
+            $url .= '//' . $authority;
+        }
+        $url .= $this->path;
+
+        if ($this->query !== false) {
+            $url .= '?' . $this->query;
+        }
+
+        if ($this->fragment !== false) {
+            $url .= '#' . $this->fragment;
+        }
+    
+        return $url;
+    }
+
+    /** 
+     * Returns a normalized string representation of this URL. This is useful
+     * for comparison of URLs.
+     *
+     * @return  string
+     */
+    public function getNormalizedURL()
+    {
+        $url = clone $this;
+        $url->normalize();
+        return $url->getUrl();
+    }
+
+    /** 
+     * Returns a normalized Net_URL2 instance.
+     *
+     * @return  Net_URL2
+     */
+    public function normalize()
+    {
+        // See RFC 3886, section 6
+
+        // Schemes are case-insensitive
+        if ($this->scheme) {
+            $this->scheme = strtolower($this->scheme);
+        }
+
+        // Hostnames are case-insensitive
+        if ($this->host) {
+            $this->host = strtolower($this->host);
+        }
+
+        // Remove default port number for known schemes (RFC 3986, section 6.2.3)
+        if ($this->port &&
+            $this->scheme &&
+            $this->port == getservbyname($this->scheme, 'tcp')) {
+
+            $this->port = false;
+        }
+
+        // Normalize case of %XX percentage-encodings (RFC 3986, section 6.2.2.1)
+        foreach (array('userinfo', 'host', 'path') as $part) {
+            if ($this->$part) {
+                $this->$part  = preg_replace('/%[0-9a-f]{2}/ie', 'strtoupper("\0")', $this->$part);
+            }
+        }
+
+        // Path segment normalization (RFC 3986, section 6.2.2.3)
+        $this->path = self::removeDotSegments($this->path);
+
+        // Scheme based normalization (RFC 3986, section 6.2.3)
+        if ($this->host && !$this->path) {
+            $this->path = '/';
+        }
+    }
+
+    /**
+     * Returns whether this instance represents an absolute URL.
+     *
+     * @return  bool
+     */
+    public function isAbsolute()
+    {
+        return (bool) $this->scheme;
+    }
+
+    /**
+     * Returns an Net_URL2 instance representing an absolute URL relative to
+     * this URL.
+     *
+     * @param Net_URL2|string $reference relative URL
+     *
+     * @return Net_URL2
+     */
+    public function resolve($reference)
+    {
+        if (is_string($reference)) {
+            $reference = new self($reference);
+        }
+        if (!$this->isAbsolute()) {
+            throw new Exception('Base-URL must be absolute');
+        }
+
+        // A non-strict parser may ignore a scheme in the reference if it is
+        // identical to the base URI's scheme.
+        if (!$this->getOption(self::OPTION_STRICT) && $reference->scheme == $this->scheme) {
+            $reference->scheme = false;
+        }
+
+        $target = new self('');
+        if ($reference->scheme !== false) {
+            $target->scheme = $reference->scheme;
+            $target->setAuthority($reference->getAuthority());
+            $target->path  = self::removeDotSegments($reference->path);
+            $target->query = $reference->query;
+        } else {
+            $authority = $reference->getAuthority();
+            if ($authority !== false) {
+                $target->setAuthority($authority);
+                $target->path  = self::removeDotSegments($reference->path);
+                $target->query = $reference->query;
+            } else {
+                if ($reference->path == '') {
+                    $target->path = $this->path;
+                    if ($reference->query !== false) {
+                        $target->query = $reference->query;
+                    } else {
+                        $target->query = $this->query;
+                    }
+                } else {
+                    if (substr($reference->path, 0, 1) == '/') {
+                        $target->path = self::removeDotSegments($reference->path);
+                    } else {
+                        // Merge paths (RFC 3986, section 5.2.3)
+                        if ($this->host !== false && $this->path == '') {
+                            $target->path = '/' . $this->path;
+                        } else {
+                            $i = strrpos($this->path, '/');
+                            if ($i !== false) {
+                                $target->path = substr($this->path, 0, $i + 1);
+                            }
+                            $target->path .= $reference->path;
+                        }
+                        $target->path = self::removeDotSegments($target->path);
+                    }
+                    $target->query = $reference->query;
+                }
+                $target->setAuthority($this->getAuthority());
+            }
+            $target->scheme = $this->scheme;
+        }
+
+        $target->fragment = $reference->fragment;
+
+        return $target;
+    }
+
+    /**
+     * Removes dots as described in RFC 3986, section 5.2.4, e.g.
+     * "/foo/../bar/baz" => "/bar/baz"
+     *
+     * @param string $path a path
+     *
+     * @return string a path
+     */
+    private static function removeDotSegments($path)
+    {
+        $output = '';
+
+        // Make sure not to be trapped in an infinite loop due to a bug in this
+        // method
+        $j = 0; 
+        while ($path && $j++ < 100) {
+            // Step A
+            if (substr($path, 0, 2) == './') {
+                $path = substr($path, 2);
+            } elseif (substr($path, 0, 3) == '../') {
+                $path = substr($path, 3);
+
+            // Step B
+            } elseif (substr($path, 0, 3) == '/./' || $path == '/.') {
+                $path = '/' . substr($path, 3);
+
+            // Step C
+            } elseif (substr($path, 0, 4) == '/../' || $path == '/..') {
+                $path = '/' . substr($path, 4);
+                $i = strrpos($output, '/');
+                $output = $i === false ? '' : substr($output, 0, $i);
+
+            // Step D
+            } elseif ($path == '.' || $path == '..') {
+                $path = '';
+
+            // Step E
+            } else {
+                $i = strpos($path, '/');
+                if ($i === 0) {
+                    $i = strpos($path, '/', 1);
+                }
+                if ($i === false) {
+                    $i = strlen($path);
+                }
+                $output .= substr($path, 0, $i);
+                $path = substr($path, $i);
+            }
+        }
+
+        return $output;
+    }
+
+    /**
+     * Returns a Net_URL2 instance representing the canonical URL of the
+     * currently executing PHP script.
+     * 
+     * @return  string
+     */
+    public static function getCanonical()
+    {
+        if (!isset($_SERVER['REQUEST_METHOD'])) {
+            // ALERT - no current URL
+            throw new Exception('Script was not called through a webserver');
+        }
+
+        // Begin with a relative URL
+        $url = new self($_SERVER['PHP_SELF']);
+        $url->scheme = isset($_SERVER['HTTPS']) ? 'https' : 'http';
+        $url->host = $_SERVER['SERVER_NAME'];
+        $port = intval($_SERVER['SERVER_PORT']);
+        if ($url->scheme == 'http' && $port != 80 ||
+            $url->scheme == 'https' && $port != 443) {
+
+            $url->port = $port;
+        }
+        return $url;
+    }
+
+    /**
+     * Returns the URL used to retrieve the current request.
+     *
+     * @return  string
+     */
+    public static function getRequestedURL()
+    {
+        return self::getRequested()->getUrl();
+    }
+
+    /**
+     * Returns a Net_URL2 instance representing the URL used to retrieve the
+     * current request.
+     *
+     * @return  Net_URL2
+     */
+    public static function getRequested()
+    {
+        if (!isset($_SERVER['REQUEST_METHOD'])) {
+            // ALERT - no current URL
+            throw new Exception('Script was not called through a webserver');
+        }
+
+        // Begin with a relative URL
+        $url = new self($_SERVER['REQUEST_URI']);
+        $url->scheme = isset($_SERVER['HTTPS']) ? 'https' : 'http';
+        // Set host and possibly port
+        $url->setAuthority($_SERVER['HTTP_HOST']);
+        return $url;
+    }
+
+    /**
+     * Sets the specified option.
+     *
+     * @param string $optionName a self::OPTION_ constant
+     * @param mixed  $value      option value  
+     *
+     * @return void
+     * @see  self::OPTION_STRICT
+     * @see  self::OPTION_USE_BRACKETS
+     * @see  self::OPTION_ENCODE_KEYS
+     */
+    function setOption($optionName, $value)
+    {
+        if (!array_key_exists($optionName, $this->options)) {
+            return false;
+        }
+        $this->options[$optionName] = $value;
+    }
+
+    /**
+     * Returns the value of the specified option.
+     *
+     * @param string $optionName The name of the option to retrieve
+     *
+     * @return  mixed
+     */
+    function getOption($optionName)
+    {
+        return isset($this->options[$optionName])
+            ? $this->options[$optionName] : false;
+    }
+}