WordPress

<?php


namespace App\Util\OAuth;


use App\Util\OAuthException;

if(!class_exists("OAuthRequest") ) {
    class OAuthRequest {
        private $parameters;
        private $http_method;
        private $http_url;
        // for debug purposes
        public $base_string;
        public static $version = '1.0';
        public static $POST_INPUT = 'php://input';

        function __construct($http_method, $http_url, $parameters=NULL) {
            @$parameters or $parameters = array();
            $this->parameters = $parameters;
            $this->http_method = $http_method;
            $this->http_url = $http_url;
        }


        /**
         * attempt to build up a request from what was passed to the server
         */
        public static function from_request($http_method=NULL, $http_url=NULL, $parameters=NULL) {
            $scheme = (!isset($_SERVER['HTTPS']) || $_SERVER['HTTPS'] != "on")
                ? 'http'
                : 'https';
            @$http_url or $http_url = $scheme .
                '://' . $_SERVER['HTTP_HOST'] .
                ':' .
                $_SERVER['SERVER_PORT'] .
                $_SERVER['REQUEST_URI'];
            @$http_method or $http_method = $_SERVER['REQUEST_METHOD'];

            // We weren't handed any parameters, so let's find the ones relevant to
            // this request.
            // If you run XML-RPC or similar you should use this to provide your own
            // parsed parameter-list
            if (!$parameters) {
                // Find request headers
                $request_headers = OAuthUtil::get_headers();

                // Parse the query-string to find GET parameters
                $parameters = OAuthUtil::parse_parameters($_SERVER['QUERY_STRING']);

                // It's a POST request of the proper content-type, so parse POST
                // parameters and add those overriding any duplicates from GET
                if ($http_method == "POST"
                    && @strstr($request_headers["Content-Type"],
                        "application/x-www-form-urlencoded")
                ) {
                    $post_data = OAuthUtil::parse_parameters(
                        file_get_contents(self::$POST_INPUT)
                    );
                    $parameters = array_merge($parameters, $post_data);
                }

                // We have a Authorization-header with OAuth data. Parse the header
                // and add those overriding any duplicates from GET or POST
                if (@substr($request_headers['Authorization'], 0, 6) == "OAuth ") {
                    $header_parameters = OAuthUtil::split_header(
                        $request_headers['Authorization']
                    );
                    $parameters = array_merge($parameters, $header_parameters);
                }

            }

            return new \App\Util\OAuthRequest($http_method, $http_url, $parameters);
        }

        /**
         * pretty much a helper function to set up the request
         */
        public static function from_consumer_and_token($consumer, $token, $http_method, $http_url, $parameters=NULL) {
            @$parameters or $parameters = array();
            $defaults = array("oauth_version" => OAuthRequest::$version,
                "oauth_nonce" => OAuthRequest::generate_nonce(),
                "oauth_timestamp" => OAuthRequest::generate_timestamp(),
                "oauth_consumer_key" => $consumer->key);
            if ($token)
                $defaults['oauth_token'] = $token->key;

            $parameters = array_merge($defaults, $parameters);

            return new OAuthRequest($http_method, $http_url, $parameters);
        }

        public function set_parameter($name, $value, $allow_duplicates = true) {
            if ($allow_duplicates && isset($this->parameters[$name])) {
                // We have already added parameter(s) with this name, so add to the list
                if (is_scalar($this->parameters[$name])) {
                    // This is the first duplicate, so transform scalar (string)
                    // into an array so we can add the duplicates
                    $this->parameters[$name] = array($this->parameters[$name]);
                }

                $this->parameters[$name][] = $value;
            } else {
                $this->parameters[$name] = $value;
            }
        }

        public function get_parameter($name) {
            return isset($this->parameters[$name]) ? $this->parameters[$name] : null;
        }

        public function get_parameters() {
            return $this->parameters;
        }

        public function unset_parameter($name) {
            unset($this->parameters[$name]);
        }

        /**
         * The request parameters, sorted and concatenated into a normalized string.
         * @return string
         */
        public function get_signable_parameters() {
            // Grab all parameters
            $params = $this->parameters;

            // Remove oauth_signature if present
            // Ref: Spec: 9.1.1 ("The oauth_signature parameter MUST be excluded.")
            if (isset($params['oauth_signature'])) {
                unset($params['oauth_signature']);
            }

            return OAuthUtil::build_http_query($params);
        }

        /**
         * Returns the base string of this request
         *
         * The base string defined as the method, the url
         * and the parameters (normalized), each urlencoded
         * and the concated with &.
         */
        public function get_signature_base_string() {
            $parts = array(
                $this->get_normalized_http_method(),
                $this->get_normalized_http_url(),
                $this->get_signable_parameters()
            );

            $parts = OAuthUtil::urlencode_rfc3986($parts);

            return implode('&', $parts);
        }

        /**
         * just uppercases the http method
         */
        public function get_normalized_http_method() {
            return strtoupper($this->http_method);
        }

        /**
         * parses the url and rebuilds it to be
         * scheme://host/path
         */
        public function get_normalized_http_url() {
            $parts = parse_url($this->http_url);

            $port = @$parts['port'];
            $scheme = $parts['scheme'];
            $host = $parts['host'];
            $path = @$parts['path'];

            $port or $port = ($scheme == 'https') ? '443' : '80';

            if (($scheme == 'https' && $port != '443')
                || ($scheme == 'http' && $port != '80')) {
                $host = "$host:$port";
            }
            return "$scheme://$host$path";
        }

        /**
         * builds a url usable for a GET request
         */
        public function to_url() {
            $post_data = $this->to_postdata();
            $out = $this->get_normalized_http_url();
            if ($post_data) {
                $out .= '?'.$post_data;
            }
            return $out;
        }

        /**
         * builds the data one would send in a POST request
         */
        public function to_postdata() {
            return OAuthUtil::build_http_query($this->parameters);
        }

        /**
         * builds the Authorization: header
         */
        public function to_header() {
            $out ='Authorization: OAuth realm=""';
            $total = array();
            foreach ($this->parameters as $k => $v) {
                if (substr($k, 0, 5) != "oauth") continue;
                if (is_array($v)) {
                    throw new OAuthException('Arrays not supported in headers');
                }
                $out .= ',' .
                    OAuthUtil::urlencode_rfc3986($k) .
                    '="' .
                    OAuthUtil::urlencode_rfc3986($v) .
                    '"';
            }
            return $out;
        }

        public function __toString() {
            return $this->to_url();
        }


        public function sign_request($signature_method, $consumer, $token) {
            $this->set_parameter(
                "oauth_signature_method",
                $signature_method->get_name(),
                false
            );
            $signature = $this->build_signature($signature_method, $consumer, $token);
            $this->set_parameter("oauth_signature", $signature, false);
        }

        public function build_signature($signature_method, $consumer, $token) {
            $signature = $signature_method->build_signature($this, $consumer, $token);
            return $signature;
        }

        /**
         * util function: current timestamp
         */
        private static function generate_timestamp() {
            return time();
        }

        /**
         * util function: current nonce
         */
        private static function generate_nonce() {
            mt_srand((double)microtime()*10000);//optional for php 4.2.0 and up.
            $charid = strtoupper(md5(uniqid(rand(), true)));
            $hyphen = chr(45);// "-"
            $uuid = chr(123)// "{"
                .substr($charid, 0, 8).$hyphen
                .substr($charid, 8, 4).$hyphen
                .substr($charid,12, 4).$hyphen
                .substr($charid,16, 4).$hyphen
                .substr($charid,20,12)
                .chr(125);// "}"
            return $uuid;
        }
    }
}