HttpURLConnection Message: Output stream not affected?

I am developing an Android app and have already figured out that different Android versions have different ways to manage Http urls (http://stackoverflow.com/q/9556316/151682).

I ran into the problem that Android 4 does a fine POST request over HTTPS adding Content-Type headers automatically when running the code below.

However, on Android 2.3.5 (device and emulator) any write to the output stream seems to be ignored - I debugged it with Charles's web proxy and when all headers are sent, the data written to the output stream is not sent ...

Does anyone know how to solve this?

Note. Since the API I'm developing against only has a self-signed certificate, I need to disable certificate validation for the time being.

TIA, Patrick

Update At the same time, I also tried to follow, to no avail:

• Call close()
  
  after call flush()
  
  to BufferedOutputStream
• Call on close()
  
  both OutputStream and BufferedOutputStream
• Use OutputStreamWriter instead

• Do not call close()
  
  before callinggetInputStream()
  
  

  HttpURLConnection connection = (HttpURLConnection) url.openConnection();
  connection.setConnectTimeout(CONNECT_TIMEOUT);
  
  connection.setDoOutput(true); // Triggers POST.
  connection.setRequestMethod("POST");
  int contentLength = 0;
  if(body != null) {
      contentLength = body.getBytes().length;
  }
  
  // Workarounds for older Android versions who do not do that automatically (2.3.5 for example)
  connection.setRequestProperty(HTTP.TARGET_HOST, url.getHost());
  connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
  
  // Set SSL Context -- Development only
  if(context != null && connection instanceof HttpsURLConnection){
      HttpsURLConnection conn = (HttpsURLConnection)connection;
      conn.setSSLSocketFactory(context.getSocketFactory());
      conn.setHostnameVerifier(new HostnameVerifier() {
          @Override
          public boolean verify(String hostname, SSLSession session) {
              return true;
          }
      });
  }
  
  try{
      // Add headers
      if(headers != null){
          for (NameValuePair nvp : headers) {
              if(nvp != null){
                  connection.setRequestProperty(nvp.getName(), nvp.getValue());
              }
          }
      }
  
      connection.setFixedLengthStreamingMode(contentLength);
      OutputStream outputStream = null;
      try {
          if(body != null){
              outputStream = connection.getOutputStream();
              BufferedOutputStream stream = new BufferedOutputStream(outputStream);
              stream.write(body.getBytes()); // <<<< No effect ?!
              stream.flush();
  
          }
      } finally {
          if (outputStream != null) 
              try { 
                  outputStream.close(); 
              }
          catch (IOException logOrIgnore) {
              // ...
          }
      }
  
      InputStream inputStream = connection.getInputStream();
  
      // .... Normal case ....
  
  }
  catch(IOException e){
      // ... Exception! Check Error stream and the response code ...
  
  
  }
  finally{
      connection.disconnect();
  }
  
        
  
          
          
          
        
  
      

  }