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+<?php
+
+/**
+ * Perform a signed OAuth request with a GET, POST, PUT or DELETE operation.
+ *
+ * @version $Id: OAuthRequester.php 63 2009-02-25 10:24:33Z marcw@pobox.com $
+ * @author Marc Worrell <marcw@pobox.com>
+ * @date Nov 20, 2007 1:41:38 PM
+ *
+ * The MIT License
+ *
+ * Copyright (c) 2007-2008 Mediamatic Lab
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+require_once dirname(__FILE__) . '/OAuthRequestSigner.php';
+require_once dirname(__FILE__) . '/body/OAuthBodyContentDisposition.php';
+
+
+class OAuthRequester extends OAuthRequestSigner
+{
+ protected $files;
+
+ /**
+ * Construct a new request signer. Perform the request with the doRequest() method below.
+ *
+ * A request can have either one file or a body, not both.
+ *
+ * The files array consists of arrays:
+ * - file the filename/path containing the data for the POST/PUT
+ * - data data for the file, omit when you have a file
+ * - mime content-type of the file
+ * - filename filename for content disposition header
+ *
+ * When OAuth (and PHP) can support multipart/form-data then we can handle more than one file.
+ * For now max one file, with all the params encoded in the query string.
+ *
+ * @param string request
+ * @param string method http method. GET, PUT, POST etc.
+ * @param array params name=>value array with request parameters
+ * @param string body optional body to send
+ * @param array files optional files to send (max 1 till OAuth support multipart/form-data posts)
+ */
+ function __construct ( $request, $method = 'GET', $params = null, $body = null, $files = null )
+ {
+ parent::__construct($request, $method, $params, $body);
+
+ // When there are files, then we can construct a POST with a single file
+ if (!empty($files))
+ {
+ $empty = true;
+ foreach ($files as $f)
+ {
+ $empty = $empty && empty($f['file']) && !isset($f['data']);
+ }
+
+ if (!$empty)
+ {
+ if (!is_null($body))
+ {
+ throw new OAuthException('When sending files, you can\'t send a body as well.');
+ }
+ $this->files = $files;
+ }
+ }
+ }
+
+
+ /**
+ * Perform the request, returns the response code, headers and body.
+ *
+ * @param int usr_id optional user id for which we make the request
+ * @param array curl_options optional extra options for curl request
+ * @param array options options like name and token_ttl
+ * @exception OAuthException when authentication not accepted
+ * @exception OAuthException when signing was not possible
+ * @return array (code=>int, headers=>array(), body=>string)
+ */
+ function doRequest ( $usr_id = 0, $curl_options = array(), $options = array() )
+ {
+ $name = isset($options['name']) ? $options['name'] : '';
+ if (isset($options['token_ttl']))
+ {
+ $this->setParam('xoauth_token_ttl', intval($options['token_ttl']));
+ }
+
+ if (!empty($this->files))
+ {
+ // At the moment OAuth does not support multipart/form-data, so try to encode
+ // the supplied file (or data) as the request body and add a content-disposition header.
+ list($extra_headers, $body) = OAuthBodyContentDisposition::encodeBody($this->files);
+ $this->setBody($body);
+ $curl_options = $this->prepareCurlOptions($curl_options, $extra_headers);
+ }
+ $this->sign($usr_id, null, $name);
+ $text = $this->curl_raw($curl_options);
+ $result = $this->curl_parse($text);
+ if ($result['code'] >= 400)
+ {
+ throw new OAuthException('Request failed with code ' . $result['code'] . ': ' . $result['body']);
+ }
+
+ // Record the token time to live for this server access token, immediate delete iff ttl <= 0
+ // Only done on a succesful request.
+ $token_ttl = $this->getParam('xoauth_token_ttl', false);
+ if (is_numeric($token_ttl))
+ {
+ $this->store->setServerTokenTtl($this->getParam('oauth_consumer_key',true), $this->getParam('oauth_token',true), $token_ttl);
+ }
+
+ return $result;
+ }
+
+
+ /**
+ * Request a request token from the site belonging to consumer_key
+ *
+ * @param string consumer_key
+ * @param int usr_id
+ * @param array params (optional) extra arguments for when requesting the request token
+ * @param string method (optional) change the method of the request, defaults to POST (as it should be)
+ * @param array options (optional) options like name and token_ttl
+ * @exception OAuthException when no key could be fetched
+ * @exception OAuthException when no server with consumer_key registered
+ * @return array (authorize_uri, token)
+ */
+ static function requestRequestToken ( $consumer_key, $usr_id, $params = null, $method = 'POST', $options = array() )
+ {
+ OAuthRequestLogger::start();
+
+ if (isset($options['token_ttl']) && is_numeric($options['token_ttl']))
+ {
+ $params['xoauth_token_ttl'] = intval($options['token_ttl']);
+ }
+
+ $store = elggconnect_get_oauth_store();//OAuthStore::instance();
+ $r = $store->getServer($consumer_key, $usr_id);
+ $uri = $r['request_token_uri'];
+
+ $oauth = new OAuthRequester($uri, $method, $params);
+ $oauth->sign($usr_id, $r);
+ $text = $oauth->curl_raw();
+
+ if (empty($text))
+ {
+ throw new OAuthException('No answer from the server "'.$uri.'" while requesting a request token');
+ }
+ $data = $oauth->curl_parse($text);
+ if ($data['code'] != 200)
+ {
+ throw new OAuthException('Unexpected result from the server "'.$uri.'" ('.$data['code'].') while requesting a request token');
+ }
+ $token = array();
+ $params = explode('&', $data['body']);
+ foreach ($params as $p)
+ {
+ @list($name, $value) = explode('=', $p, 2);
+ $token[$name] = $oauth->urldecode($value);
+ }
+
+ if (!empty($token['oauth_token']) && !empty($token['oauth_token_secret']))
+ {
+ $opts = array();
+ if (isset($options['name']))
+ {
+ $opts['name'] = $options['name'];
+ }
+ if (isset($token['xoauth_token_ttl']))
+ {
+ $opts['token_ttl'] = $token['xoauth_token_ttl'];
+ }
+ $store->addServerToken($consumer_key, 'request', $token['oauth_token'], $token['oauth_token_secret'], $usr_id, $opts);
+ }
+ else
+ {
+ throw new OAuthException('The server "'.$uri.'" did not return the oauth_token or the oauth_token_secret');
+ }
+
+ OAuthRequestLogger::flush();
+
+ // Now we can direct a browser to the authorize_uri
+ return array(
+ 'authorize_uri' => $r['authorize_uri'],
+ 'token' => $token['oauth_token']
+ );
+ }
+
+
+ /**
+ * Request an access token from the site belonging to consumer_key.
+ * Before this we got an request token, now we want to exchange it for
+ * an access token.
+ *
+ * @param string consumer_key
+ * @param string token
+ * @param int usr_id user requesting the access token
+ * @param string method (optional) change the method of the request, defaults to POST (as it should be)
+ * @param array options (optional) extra options for request, eg token_ttl
+ * @exception OAuthException when no key could be fetched
+ * @exception OAuthException when no server with consumer_key registered
+ */
+ static function requestAccessToken ( $consumer_key, $token, $usr_id, $method = 'POST', $options = array() )
+ {
+ OAuthRequestLogger::start();
+
+ $store = elggconnect_get_oauth_store();//OAuthStore::instance();
+ $r = $store->getServerTokenSecrets($consumer_key, $token, 'request', $usr_id);
+ $uri = $r['access_token_uri'];
+ $token_name = $r['token_name'];
+
+ // Delete the server request token, this one was for one use only
+ $store->deleteServerToken($consumer_key, $r['token'], 0, true);
+
+ // Try to exchange our request token for an access token
+ $oauth = new OAuthRequester($uri, $method);
+
+ if (isset($options['token_ttl']) && is_numeric($options['token_ttl']))
+ {
+ $oauth->setParam('xoauth_token_ttl', intval($options['token_ttl']));
+ }
+
+ OAuthRequestLogger::setRequestObject($oauth);
+
+ $oauth->sign($usr_id, $r);
+ $text = $oauth->curl_raw();
+ if (empty($text))
+ {
+ throw new OAuthException('No answer from the server "'.$uri.'" while requesting a request token');
+ }
+ $data = $oauth->curl_parse($text);
+
+ if ($data['code'] != 200)
+ {
+ throw new OAuthException('Unexpected result from the server "'.$uri.'" ('.$data['code'].') while requesting a request token');
+ }
+
+ $token = array();
+ $params = explode('&', $data['body']);
+ foreach ($params as $p)
+ {
+ @list($name, $value) = explode('=', $p, 2);
+ $token[$oauth->urldecode($name)] = $oauth->urldecode($value);
+ }
+
+ if (!empty($token['oauth_token']) && !empty($token['oauth_token_secret']))
+ {
+ $opts = array();
+ $opts['name'] = $token_name;
+ if (isset($token['xoauth_token_ttl']))
+ {
+ $opts['token_ttl'] = $token['xoauth_token_ttl'];
+ }
+ $store->addServerToken($consumer_key, 'access', $token['oauth_token'], $token['oauth_token_secret'], $usr_id, $opts);
+ }
+ else
+ {
+ throw new OAuthException('The server "'.$uri.'" did not return the oauth_token or the oauth_token_secret');
+ }
+
+ OAuthRequestLogger::flush();
+ }
+
+
+
+ /**
+ * Open and close a curl session passing all the options to the curl libs
+ *
+ * @param string url the http address to fetch
+ * @exception OAuthException when temporary file for PUT operation could not be created
+ * @return string the result of the curl action
+ */
+ protected function curl_raw ( $opts = array() )
+ {
+ if (isset($opts[CURLOPT_HTTPHEADER]))
+ {
+ $header = $opts[CURLOPT_HTTPHEADER];
+ }
+ else
+ {
+ $header = array();
+ }
+
+ $ch = curl_init();
+ $method = $this->getMethod();
+ $url = $this->getRequestUrl();
+ $header[] = $this->getAuthorizationHeader();
+ $query = $this->getQueryString();
+ $body = $this->getBody();
+
+ $has_content_type = false;
+ foreach ($header as $h)
+ {
+ if (strncasecmp($h, 'Content-Type:', 13) == 0)
+ {
+ $has_content_type = true;
+ }
+ }
+
+ if (!is_null($body))
+ {
+ if ($method == 'TRACE')
+ {
+ throw new OAuthException('A body can not be sent with a TRACE operation');
+ }
+
+ // PUT and POST allow a request body
+ if (!empty($query))
+ {
+ $url .= '?'.$query;
+ }
+
+ // Make sure that the content type of the request is ok
+ if (!$has_content_type)
+ {
+ $header[] = 'Content-Type: application/octet-stream';
+ $has_content_type = true;
+ }
+
+ // When PUTting, we need to use an intermediate file (because of the curl implementation)
+ if ($method == 'PUT')
+ {
+ /*
+ if (version_compare(phpversion(), '5.2.0') >= 0)
+ {
+ // Use the data wrapper to create the file expected by the put method
+ $put_file = fopen('data://application/octet-stream;base64,'.base64_encode($body));
+ }
+ */
+
+ $put_file = @tmpfile();
+ if (!$put_file)
+ {
+ throw new OAuthException('Could not create tmpfile for PUT operation');
+ }
+ fwrite($put_file, $body);
+ fseek($put_file, 0);
+
+ curl_setopt($ch, CURLOPT_PUT, true);
+ curl_setopt($ch, CURLOPT_INFILE, $put_file);
+ curl_setopt($ch, CURLOPT_INFILESIZE, strlen($body));
+ }
+ else
+ {
+ curl_setopt($ch, CURLOPT_POST, true);
+ curl_setopt($ch, CURLOPT_POSTFIELDS, $body);
+ }
+ }
+ else
+ {
+ // a 'normal' request, no body to be send
+ if ($method == 'POST')
+ {
+ if (!$has_content_type)
+ {
+ $header[] = 'Content-Type: application/x-www-form-urlencoded';
+ $has_content_type = true;
+ }
+
+ curl_setopt($ch, CURLOPT_POST, true);
+ curl_setopt($ch, CURLOPT_POSTFIELDS, $query);
+ }
+ else
+ {
+ if (!empty($query))
+ {
+ $url .= '?'.$query;
+ }
+ if ($method != 'GET')
+ {
+ curl_setopt($ch, CURLOPT_CUSTOMREQUEST, $method);
+ }
+ }
+ }
+
+ curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
+ curl_setopt($ch, CURLOPT_USERAGENT, 'anyMeta/OAuth 1.0 - ($LastChangedRevision: 63 $)');
+ curl_setopt($ch, CURLOPT_URL, $url);
+ curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
+ curl_setopt($ch, CURLOPT_HEADER, true);
+
+ foreach ($opts as $k => $v)
+ {
+ if ($k != CURLOPT_HTTPHEADER)
+ {
+ curl_setopt($ch, $k, $v);
+ }
+ }
+
+ $txt = curl_exec($ch);
+ curl_close($ch);
+
+ if (!empty($put_file))
+ {
+ fclose($put_file);
+ }
+
+ // Tell the logger what we requested and what we received back
+ $data = $method . " $url\n".implode("\n",$header);
+ if (is_string($body))
+ {
+ $data .= "\n\n".$body;
+ }
+ else if ($method == 'POST')
+ {
+ $data .= "\n\n".$query;
+ }
+
+ OAuthRequestLogger::setSent($data, $body);
+ OAuthRequestLogger::setReceived($txt);
+
+ return $txt;
+ }
+
+
+ /**
+ * Parse an http response
+ *
+ * @param string response the http text to parse
+ * @return array (code=>http-code, headers=>http-headers, body=>body)
+ */
+ protected function curl_parse ( $response )
+ {
+ if (empty($response))
+ {
+ return array();
+ }
+
+ @list($headers,$body) = explode("\r\n\r\n",$response,2);
+ $lines = explode("\r\n",$headers);
+
+ if (preg_match('@^HTTP/[0-9]\.[0-9] +100@', $lines[0]))
+ {
+ /* HTTP/1.x 100 Continue
+ * the real data is on the next line
+ */
+ @list($headers,$body) = explode("\r\n\r\n",$body,2);
+ $lines = explode("\r\n",$headers);
+ }
+
+ // first line of headers is the HTTP response code
+ $http_line = array_shift($lines);
+ if (preg_match('@^HTTP/[0-9]\.[0-9] +([0-9]{3})@', $http_line, $matches))
+ {
+ $code = $matches[1];
+ }
+
+ // put the rest of the headers in an array
+ $headers = array();
+ foreach ($lines as $l)
+ {
+ list($k, $v) = explode(': ', $l, 2);
+ $headers[strtolower($k)] = $v;
+ }
+
+ return array( 'code' => $code, 'headers' => $headers, 'body' => $body);
+ }
+
+
+ /**
+ * Mix the given headers into the headers that were given to curl
+ *
+ * @param array curl_options
+ * @param array extra_headers
+ * @return array new curl options
+ */
+ protected function prepareCurlOptions ( $curl_options, $extra_headers )
+ {
+ $hs = array();
+ if (!empty($curl_options[CURLOPT_HTTPHEADER]) && is_array($curl_options[CURLOPT_HTTPHEADER]))
+ {
+ foreach ($curl_options[CURLOPT_HTTPHEADER] as $h)
+ {
+ list($opt, $val) = explode(':', $h, 2);
+ $opt = str_replace(' ', '-', ucwords(str_replace('-', ' ', $opt)));
+ $hs[$opt] = $val;
+ }
+ }
+
+ $curl_options[CURLOPT_HTTPHEADER] = array();
+ $hs = array_merge($hs, $extra_headers);
+ foreach ($hs as $h => $v)
+ {
+ $curl_options[CURLOPT_HTTPHEADER][] = "$h: $v";
+ }
+ return $curl_options;
+ }
+}
+
+/* vi:set ts=4 sts=4 sw=4 binary noeol: */
+
+?> \ No newline at end of file
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