2010-02-26 4 views
5

Aide :(Quelqu'un sait comment écrire une requête POST pour le téléchargement de vidéos Youtube via l'API Youtube, en Java?Youtube POST télécharger en Java

La structure de la requête POST requis est décrit here.

Malheureusement, je ne peux pas utiliser les librairies client Java de Java, car je travaille sous Android, qui ne les supporte pas:

J'ai quelques tentatives de code ci-dessous, mais cela ne marche pas (j'obtiens l'erreur que conn.getResponseCode() est null).


public void videoUpload() { 

    HttpURLConnection conn = null; 
    // BufferedReader br = null; 
    DataOutputStream dos = null; 
    InputStream inStream = null; 

    // InputStream is = null; 
    // OutputStream os = null; 
    // boolean ret = false; 
    // String StrMessage = ""; 
    //file path 

    // get filename from videoURI 
    String path = "file:///sdcard/"; 
    String existingFileName = "video.3gp"; 
    File videoFile = new File(path + existingFileName); 

    // String lineEnd = "\r\n"; 
    String twoHyphens = "--"; 
    String boundary = "b93dcbA3"; 
    String ver = "2"; 

    int bytesRead, bytesAvailable, bufferSize; 
    byte[] buffer; 
    int maxBufferSize = 1024; 

    // String responseFromServer = ""; 

    try { 
     FileInputStream fileInputStream = new FileInputStream(videoFile); 

     URL url = new URL("http://uploads.gdata.youtube.com/feeds/api/users/[XXXXXXXXXX]/uploads"); 
     conn = (HttpURLConnection) url.openConnection(); 

     // Allow Inputs 
     conn.setDoInput(true); 
     // Allow Outputs 
     conn.setDoOutput(true); 
     // Don't use a cached copy. 
     conn.setUseCaches(false); 

     // Use a post method. 
     conn.setRequestMethod("POST"); 
     // conn.setRequestProperty("Connection", "Keep-Alive"); 
     conn.setRequestProperty("Host", "uploads.gdata.youtube.com"); 
     conn.setRequestProperty("Authorization", "GoogleLogin auth=" + token); 
     conn.setRequestProperty("GData-Version", ver); 
     conn.setRequestProperty("X-Gdata-Client", clientId); 
     conn.setRequestProperty("X-GData-Key", "key=" + developerKey); 
     conn.setRequestProperty("Slug", existingFileName); //fix this 
     conn.setRequestProperty("Content-Type", 
       "multipart/related;boundary=" + boundary); 
     conn.setRequestProperty("Content-Length", new Long(videoFile //and this 
       .length()).toString()); 
     conn.setRequestProperty("Connection", "close"); 

     //do we not want a boundary string here? 

     conn.setRequestProperty("Content-Type", 
     "application/atom+xml; charset=UTF-8"); 

     //and here? 
     conn.setRequestProperty("Content-Type", "video/3gpp"); 
     conn.setRequestProperty("Content-Transfer-Encoding", "binary"); 

     dos = new DataOutputStream(conn.getOutputStream()); 
     dos.write((twoHyphens + boundary).toString().getBytes()); 

     StringBuilder test_xml = new StringBuilder(); 
     test_xml.append("<?xml version='1.0' encoding='UTF-8'?>\n"); 
     test_xml.append("<entry xmlns=\"http://www.w3.org/2005/Atom\"\n"); 
     test_xml.append("xmlns:media=\"http://search.yahoo.com/mrss/\"\n"); 
     test_xml.append("xmlns:yt=\"http://gdata.youtube.com/schemas/2007\">\n"); 
     test_xml.append("<media:group>\n"); 
     test_xml.append("<media:title type=\"plain\">Test Video</media:title>\n"); 
     test_xml.append("<media:description type=\"plain\">\nTest Video\n</media:description>\n"); 
     test_xml.append("<media:category\n"); 
     test_xml.append("scheme=\"http://gdata.youtube.com/schemas/2007/categories.cat\">People\n"); 
     test_xml.append("</media:category>\n"); 
     test_xml.append("<media:keywords>toast, election, wedding</media:keywords>\n"); 
     test_xml.append("</media:group>\n"); 
     test_xml.append("</entry>"); 

     dos.write(test_xml.toString().getBytes("UTF-8")); 

     // System.out.println(test_xml.toString()); 
     dos.write((twoHyphens + boundary).toString().getBytes()); 

     // create a buffer of maximum size 
     bytesAvailable = fileInputStream.available(); 
     bufferSize = Math.min(bytesAvailable, maxBufferSize); 
     buffer = new byte[bufferSize]; 

     // read file and write it into form 
     bytesRead = fileInputStream.read(buffer, 0, bufferSize); 
     while (bytesRead > 0) { 
      // dos.flush(); 
      dos.write(buffer, 0, bufferSize); 
      bytesAvailable = fileInputStream.available(); 
      bufferSize = Math.min(bytesAvailable, maxBufferSize); 
      bytesRead = fileInputStream.read(buffer, 0, bufferSize); 
     } 

     // byte [] buf = new byte[2048]; // Transfer in 2k chunks 
     // int bytesRead = 0; 
     // while ((bytesRead = fileInputStream.read(buf, 0, buf.length)) >= 
     // 0) { 
     // dos.write(buf, 0, bytesRead); 
     // // dos.flush(); 
     // } 

     // send multipart form data necesssary after file data 
     // dos.writeBytes(lineEnd); 
     // dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd); 
     dos.write((twoHyphens + boundary + twoHyphens).toString() 
       .getBytes()); 

     // close streams 
     fileInputStream.close(); 
     dos.flush(); 
     dos.close(); 


    } catch (MalformedURLException ex) { 
     ex.printStackTrace(); 
    } catch (IOException ioe) { 
     ioe.printStackTrace(); 
    } 


    int responseCode; 
    StringBuilder outputBuilder = new StringBuilder(); 
    try { 
     responseCode = conn.getResponseCode(); 
     if (responseCode == HttpURLConnection.HTTP_OK) { 
      inStream = conn.getInputStream(); 
     } else { 
      inStream = conn.getErrorStream(); 
     } 

     String string; 
     if (inStream != null) { 
      BufferedReader reader = new BufferedReader(
        new InputStreamReader(inStream)); 
      while (null != (string = reader.readLine())) { 
       outputBuilder.append(string).append("\n"); 
      } 
     } 
    } catch (IOException e) { 
     // TODO Auto-generated catch block 
     e.printStackTrace(); 
    } finally { 
     if (inStream != null) { 
      try { 
       inStream.close(); 
      } catch (IOException e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } 
     } 
    } 

    System.out.println(outputBuilder.toString()); 
    Log.d(LOG_TAG, outputBuilder.toString()); 
} 

Répondre

1

Je l'ai utilisé la bibliothèque de téléchargement de fichiers Apache avant et simplifie les demandes de poste pour les fichiers, etc. grandement: Apache commons file upload

1

conn.getResponseCode() renvoie un int primitif, qui ne peut être nulle. Je ne suis pas sûr du type d'erreur dont vous parlez (NullPointerException?), Mais il n'est pas possible que getResponseCode renvoie null. Peut-être que conn lui-même est nul?

Si tel est le cas, une autre exception a probablement été levée par le constructeur d'URL ou par url.openConnection(). Dans ce cas, vous interceptez l'exception et imprimez la trace de la pile sur stdout, mais continuez à utiliser la référence du connecteur, qui peut être invalide.

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