HTTP Response-> Erhalten eine genaue Anzahl von Bytes, dann Schließen der Verbindung

Question

Ich bin auf ein dummes Problem läuft: Ich muss eine bestimmte Anzahl von Bytes erhalten, dann schließen Sie die Verbindung. Ich habe herausgefunden, dass ich die "Inhaltslänge" aus der Kopfzeile extrahieren kann, und benutze die Länge, um zu bestimmen, wie viele Bytes ich noch bekommen soll, bevor ich die Verbindung durchtrenne. Es scheint jedoch, dass ich einen Fehler gemacht habe. Es wird nur 40 Byte statt 2428 (wie es sollte). Vielleicht verwende ich fgets() nicht richtig? Hier

ist der Code:

private static function Send($URL, $Data) { 
      $server = parse_url($URL, PHP_URL_HOST); 
      $port = parse_url($URL, PHP_URL_PORT); 

      // If the parsing the port information fails, we will assume it's on a default port. 
      // As such, we'll set the port in the switch below. 
      if($port == null) { 
       switch(parse_url($URL, PHP_URL_SCHEME)) { 
        case "HTTP": 
         $port = 80; 
         break; 
        case "HTTPS": 
         $port = 443; 
         break; 

       } 
      } 

      // Check if we are using a proxy (debug configuration typically). 
      if(\HTTP\HTTPRequests::ProxyEnabled) { 
       $server = \HTTP\HTTPRequests::ProxyServer; 
       $port = \HTTP\HTTPRequests::ProxyPort; 
      } 



      // Open a connection to the server. 
      $connection = fsockopen($server, $port, $errno, $errstr); 
      if (!$connection) { 
       die("OMG Ponies!"); 
      } 
      echo "===========================================================<BR>"; 
      echo "Connection Open<BR>"; 
      echo "The Time is " . date("H:i:su", time()) . "<BR>"; 
      echo "Sending Request<BR>"; 

      fwrite($connection, $Data); 

      echo "Request Sent."; 
      echo "The Time is " . date("H:i:su", time()) . "<BR>"; 
      $responseheader = ""; 
      $responsebody = ""; 


      /* 
      \HTTP\HTTPRequests::$start = NULL; 
      \HTTP\HTTPRequests::$timeout = 10; 

      // @todo: Rewrite this. Should keep checking for '/r/n/r/n', then check for a content length header. If found, keep grabbing bytes, then close. If not, then close immediately. 
      while(!\HTTP\HTTPRequests::safe_feof($connection, \HTTP\HTTPRequests::$start) && (microtime(true) - \HTTP\HTTPRequests::$start) < \HTTP\HTTPRequests::$timeout) 
      { 
       $response .= fgets($connection); 
      } 
      */ 
      echo "Getting Response<BR>"; 
      echo "The Time is " . date("H:i:su", time()) . "<BR>"; 
      while(!feof($connection) && !(strlen(strstr($responseheader,"\r\n\r\n"))>0)) { 
       $responseheader .= fgets($connection); 
      } 

      echo "The Header is fully received at " . date("H:i:su", time()) . "<BR>"; 
      echo "Header (raw):" . "<BR>"; 
      echo "/////////////////////////////////////////////<BR>"; 
      echo $responseheader . "<BR>"; 
      echo "/////////////////////////////////////////////<BR>"; 

      if((strlen(strstr($responseheader,"Content-Length:"))>0)) { 
       $contentlength = ((int)(\Extract\Extract::GetContentLength($responseheader))); 
       //for($i = 0; $i < $contentlength; $i++) { 
        $responsebody .= fgets($connection, $contentlength); 
       //} 
       echo "The Body is fully received at " . date("H:i:su", time()) . "<BR>"; 
       echo "Body (raw):" . "<BR>"; 
       echo "{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}<BR>"; 
       echo $responsebody . "<BR>"; 
       echo "{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}<BR>"; 
       echo "<B>!Content length is " . strlen($responsebody) . ". It should be " . $contentlength . "!</B><BR>"; 
      } 

      echo "Response Received.<BR>"; 
      echo "The Time is " . date("H:i:su", time()) . "<BR>"; 
      fclose($connection); 

      echo "Connection Closed.<BR>"; 
      echo "The Time is " . date("H:i:su", time()) . "<BR>"; 
      echo "Exiting Send() method.<BR>"; 
      echo "===========================================================<BR>"; 
      echo "<BR>"; 

      return $responseheader . $responsebody; 
     } 

Und hier ist die Ausgabe:

=========================================================== 
Connection Open 
The Time is 15:57:29000000 
Sending Request 
Request Sent.The Time is 15:57:29000000 
Getting Response 
The Time is 15:57:29000000 
The Header is fully received at 15:57:29000000 
Header (raw): 
///////////////////////////////////////////// 
HTTP/1.1 207 Multi-Status Date: Wed, 11 Apr 2012 19:57:18 GMT Server: Apache/2.2.8 (Ubuntu) PHP/5.2.4-2ubuntu5.14 with Suhosin-Patch mod_ssl/2.2.8 OpenSSL/0.9.8g mod_wsgi/2.0 Python/2.5.2 mod_perl/2.0.3 Perl/v5.8.8 X-Powered-By: PHP/5.2.4-2ubuntu5.14 DAV: 1, 2, 3, access-control, calendar-access, calendar-schedule DAV: extended-mkcol, calendar-proxy, bind, addressbook, calendar-auto-schedule Content-Location: /davical/caldav.php/rwr26/home/ ETag: "8378ead7e628deafd91ec99dc180ad74" X-DAViCal-Version: DAViCal/0.9.9; DB/1.2.9 Content-Length: 2428 Keep-Alive: timeout=15, max=100 Connection: Keep-Alive Content-Type: text/xml; charset="utf-8" 
///////////////////////////////////////////// 
The Body is fully received at 15:57:29000000 
Body (raw): 
{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{} 

{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{} 
!Content length is 40. It should be 2428! 
Response Received. 
The Time is 15:57:29000000 
Connection Closed. 
The Time is 15:57:29000000 
Exiting Send() method. 
=========================================================== 

Warum bin ich es auf diese Weise zu tun? Anscheinend ist mir ein Timeout-Fehler aufgefallen, bei dem jede Verbindung für 30 Sekunden geöffnet bleibt (ja, 30 ganze Sekunden). Also habe ich diesen Code geschrieben, um die genaue Anzahl der Bytes zu erhalten, und dann schließen. Jede Hilfe wird sehr geschätzt.

Answer 1

Ich habe die Inhaltszeile "$ responsebody. = Fgets ($ verbindung, $ contentlength);" zu "$ responsebody. = stream_get_line ($ verbindung, $ contentlength);". Das Ding ist jetzt schnell böse und funktioniert.