PHP http::proceed_natively方法代码示例

 /**
  * display available recording, if any
  *
  * This function retrieves the list of available recordings from the BBB server,
  * and displays it to the surfer.
  */
 function get_view_text_extension()
 {
     global $context;
     // parameters to list recordings
     $parameters = array();
     $parameters[] = 'meetingID=' . urlencode($this->attributes['id']);
     // link to list recordings
     $url = $this->build_link('getRecordings', $parameters);
     // query the BBB back-end
     if (($response = http::proceed_natively($url)) && ($xml = simplexml_load_string($response)) && $xml->returncode == 'SUCCESS') {
         // ok, we have some recording available
         if ($recordings = $xml->recordings->children()) {
             // enumerate recordings, but use only the first one
             foreach ($recordings as $name => $node) {
                 // sanity checks
                 if ($name != 'recording') {
                     continue;
                 }
                 if (!isset($node->playback)) {
                     continue;
                 }
                 if (!isset($node->playback->format)) {
                     continue;
                 }
                 if (!isset($node->playback->format->url)) {
                     continue;
                 }
                 // a button to start the replay in a separate window
                 $menu = array();
                 $menu[] = Skin::build_link((string) $node->playback->format->url, 'Play the presentation', 'tee');
                 return Skin::build_box('Presentation', Skin::finalize_list($menu, 'menu_bar'));
             }
         }
     }
 }

 /**
  * the URL to start and to join the event
  *
  * @see overlays/events/start.php
  *
  * @return string the URL to redirect the user to the meeting, or NULL on error
  */
 function get_start_url()
 {
     global $context;
     // create an OpenTok session
     if (isset($context['opentok_api_key']) && $context['opentok_api_key']) {
         // server to connect to
         if (isset($context['opentok_api_url']) && $context['opentok_api_url']) {
             $url = $context['opentok_api_url'];
         } else {
             $url = 'https://staging.tokbox.com/hl';
         }
         // link to create a session
         $url .= '/session/create';
         // authenticate through HTTP headers
         $headers = array('X-TB-PARTNER-AUTH: ' . $context['opentok_api_key'] . ':' . $context['opentok_api_secret']);
         // parameters of this session
         $parameters = array();
         $parameters['api_key'] = $context['opentok_api_key'];
         $parameters['location'] = $_SERVER['REMOTE_ADDR'];
         // get a new session id
         if ($response = http::proceed_natively($url, $headers, $parameters)) {
             // invalid xml response
             if (!($xml = @simplexml_load_string($response, 'SimpleXMLElement', LIBXML_NOCDATA))) {
                 Logger::error(sprintf('OpenTok: %s', 'response is not valid XML'));
                 return NULL;
                 // error code returned by the server
             } elseif ($errors = $xml->xpath("//error")) {
                 if ($message = $errors[0]->xpath("//@message")) {
                     $message = (string) $message[0]['message'];
                 } else {
                     $message = 'unknown error';
                 }
                 Logger::error(sprintf('OpenTok: %s', $xml->error['code'] . ' ' . $xml->error->children()->getName() . ': ' . $message));
                 return NULL;
                 // no session id in the response
             } elseif (!isset($xml->Session->session_id)) {
                 Logger::error(sprintf('OpenTok: %s', 'no session id has been provided'));
                 return NULL;
             }
             // save the session id along averlay data and forward it to all participants
             $fields = array('session_id' => (string) $xml->Session->session_id);
             $this->set_values($fields);
         }
     }
     // redirect to the main page
     if (is_object($this->anchor)) {
         return $context['url_to_home'] . $context['url_to_root'] . $this->anchor->get_url();
     }
     // problem, darling!
     return NULL;
 }

 /**
  * use oEmbed to embed some object
  *
  * @link http://oembed.com/ the specification of the oEmbed protocol
  *
  * The strategy to find oEmbed data is the following:
  * - list of well-known services (e.g., slideshare, ...)
  * - sense the target url in case an oEmbed endpoint is provided
  * - submit the url to http://www.noembed.com/
  *
  * The array returned reflects the outcome of the oEmbed transaction.
  * If a network error takes place, the type is set to 'error'.
  *
  * @param string the address of the object to embed
  * @return array attributes returned by provider
  */
 public static function oembed($url)
 {
     global $context;
     // we return an array of results
     $result = array();
     // the list of known endpoints
     $endpoints = array();
     // type: video
     $endpoints['https?://(www\\.)?youtube\\.com/watch\\?'] = 'http://www.youtube.com/oembed';
     $endpoints['http://youtu\\.be/'] = 'http://www.youtube.com/oembed';
     $endpoints['https?://(www\\.)?vimeo\\.com/'] = 'http://vimeo.com/api/oembed.json';
     $endpoints['http://revision3\\.com/'] = 'http://revision3.com/api/oembed/';
     $endpoints['http://(www\\.)?5min\\.com/video/'] = 'http://api.5min.com/oembed.json';
     $endpoints['http://(www\\.)?dotsub\\.com/view/'] = 'http://dotsub.com/services/oembed';
     $endpoints['https?://(www\\.)?hulu\\.com/watch/'] = 'http://www.hulu.com/api/oembed.json';
     $endpoints['https?://(www\\.)?dailymotion\\.com/'] = 'http://www.dailymotion.com/services/oembed/';
     $endpoints['http://[^\\.]+\\.blip\\.tv/'] = 'http://blip.tv/oembed/';
     $endpoints['http://blip\\.tv/'] = 'http://blip.tv/oembed/';
     $endpoints['https?://(www\\.)?viddler\\.com/'] = 'http://lab.viddler.com/services/oembed/';
     // type: photo (or file)
     $endpoints['https?://(www\\.)?flickr\\.com/'] = 'http://www.flickr.com/services/oembed/';
     $endpoints['http://flic\\.kr/'] = 'http://www.flickr.com/services/oembed/';
     $endpoints['http://[^\\.]+\\.deviantart\\.com/'] = 'http://backend.deviantart.com/oembed';
     $endpoints['http://yfrog\\.'] = 'http://www.yfrog.com/api/oembed';
     $endpoints['https?://(www\\.)?smugmug\\.com/'] = 'http://api.smugmug.com/services/oembed/';
     $endpoints['http://[^\\.]+\\.photobucket\\.com/'] = 'http://photobucket.com/oembed';
     // type: rich
     $endpoints['https?://[^\\.]+\\.twitter\\.com/.+?/status(es)?/'] = 'https://api.twitter.com/1/statuses/oembed.json';
     $endpoints['https?://twitter\\.com/.+?/status(es)?/'] = 'https://api.twitter.com/1/statuses/oembed.json';
     $endpoints['http://official\\.fm/'] = 'http://official.fm/services/oembed.json';
     $endpoints['http://soundcloud\\.com/'] = 'http://soundcloud.com/oembed';
     $endpoints['http://rd\\.io/'] = 'http://www.rdio.com/api/oembed/';
     $endpoints['https?://(www\\.)?slideshare\\.net/'] = 'http://www.slideshare.net/api/oembed/2';
     $endpoints['https?://(www\\.)?scribd\\.com/'] = 'http://www.scribd.com/services/oembed';
     // look at each providers
     $endpoint = null;
     foreach ($endpoints as $pattern => $api) {
         // stop when one provider has been found
         if (preg_match('/' . str_replace('/', '\\/', $pattern) . '/i', $url)) {
             $endpoint = $api;
             break;
         }
     }
     // finalize the query for the matching endpoint
     if ($endpoint) {
         // prepare the oEmbed request
         $parameters = array();
         $parameters[] = 'url=' . urlencode($url);
         $parameters[] = 'maxwidth=500';
         $parameters[] = 'format=json';
         // encode provided data, if any
         $endpoint .= '?' . implode('&', $parameters);
         // else try to auto-detect an endpoint
     } elseif ($content = http::proceed_natively($url)) {
         // it is not necessary to look at page content
         $content = substr($content, 0, stripos($content, '</head>'));
         // if the endpoint signature is found
         if (stripos($content, 'application/json+oembed') !== FALSE) {
             // extract all links
             if (preg_match_all('/<link([^<>]+)>/i', $content, $links)) {
                 // look at each of them sequentially
                 foreach ($links[1] as $link) {
                     // not the oEmbed endpoint!
                     if (!stripos($link, 'application/json+oembed')) {
                         continue;
                     }
                     // got it!
                     if (preg_match('/href="([^"]+)"/i', $link, $matches)) {
                         $endpoint = trim($matches[1]);
                         break;
                     }
                 }
             }
         }
     }
     // if no provider has been found, submit this url to noembed.com
     if (!$endpoint) {
         // prepare the oEmbed request
         $parameters = array();
         $parameters[] = 'url=' . urlencode($url);
         $parameters[] = 'maxwidth=500';
         $parameters[] = 'format=json';
         // encode provided data, if any
         $endpoint = 'http://noembed.com/embed?' . implode('&', $parameters);
//.........这里部分代码省略.........

 /**
  * stop a phone call
  *
  * @param array e.g., array('call_id' => '123')
  * @return mixed some error array with code and message, or the id of the stopped call
  */
 function release($parameters)
 {
     global $context;
     // do we have some API key?
     if (!isset($context['obs_api_key'])) {
         return array('code' => -32000, 'message' => 'Missing credentials to use OBS API');
     }
     // look for a call id
     if (empty($parameters['call_id'])) {
         return array('code' => -32602, 'message' => 'Invalid parameter "call_id"');
     }
     // data to be submitted to OBS
     $data = array();
     $data[] = 'id=' . urlencode($context['obs_api_key']);
     $data[] = 'call_id=' . urlencode($parameters['call_id']);
     // build the endpoint to invoke
     $url = self::build_obs_link('call/releaseCall', $data);
     // do release the call
     if (!($response = http::proceed_natively($url))) {
         return array('code' => -32603, 'message' => 'Unable to query the OBS API');
     }
     // ensure we receive correct xml
     if (!($xml = simplexml_load_string($response, 'SimpleXMLElement', LIBXML_NOCDATA))) {
         return array('code' => -32603, 'message' => 'Invalid response from OBS API');
     }
     // stop on error
     if ($xml->status->status_code != 200) {
         return array('code' => -32000, 'message' => 'Error: ' . $xml->status->status_code . ' ' . $xml->status->status_msg);
     }
     // look for call id
     if (!($id = $xml->call_info->call_id)) {
         return array('code' => -32603, 'message' => 'Invalid response from OBS API');
     }
     // provide id back to caller
     return array('call_id' => (string) $id);
 }

 if (isset($context['opentok_api_url']) && $context['opentok_api_url']) {
     $url = $context['opentok_api_url'];
 } else {
     $url = 'https://staging.tokbox.com/hl';
 }
 // link to create a session
 $url .= '/session/create';
 // authenticate through HTTP headers
 $headers = array('X-TB-PARTNER-AUTH: ' . $context['opentok_api_key'] . ':' . $context['opentok_api_secret']);
 // parameters of this session
 $parameters = array();
 $parameters['api_key'] = $context['opentok_api_key'];
 $parameters['location'] = $_SERVER['REMOTE_ADDR'];
 //	$parameters['p2p.preference'] = 'enabled';
 // get a new session id
 if (!($response = http::proceed_natively($url, $headers, $parameters))) {
     Logger::error(sprintf('OpenTok: %s', 'response is not valid XML'));
 } elseif (!($xml = @simplexml_load_string($response, 'SimpleXMLElement', LIBXML_NOCDATA))) {
     Logger::error(sprintf('OpenTok: %s', 'response is not valid XML'));
 } elseif ($errors = $xml->xpath("//error")) {
     if ($message = $errors[0]->xpath("//@message")) {
         $message = (string) $message[0]['message'];
     } else {
         $message = 'unknown error';
     }
     Logger::error(sprintf('OpenTok: %s', $xml->error['code'] . ' ' . $xml->error->children()->getName() . ': ' . $message));
     // no session id in the response
 } elseif (!isset($xml->Session->session_id)) {
     Logger::error(sprintf('OpenTok: %s', 'no session id has been provided'));
 } else {
     // save the pair meeting id - OpenTok id in a text file