Upload file using HTTP Post multipart - 4Sharing API J2ME

Question

I'm currently developing a J2ME app. I'm having problems with file uploading. I dont seem to know what part of my code is wrong. Here is my code:

public void UploadImage(long newFileId, String url, String bytes){
    HttpConnection conn = null;
      OutputStream os = null;
      InputStream s = null;
      StringBuffer responseString = new StringBuffer();


      try
      {

         System.out.println(System.getProperty("HTTPClient.dontChunkRequests"));
         conn.setRequestMethod(HttpConnection.POST);
         conn = (HttpConnection)Connector.open(url);
         conn.setRequestProperty("resumableFileId", ""+newFileId);
         conn.setRequestProperty("resumableFirstByte", ""+0);
         conn.setRequestProperty("FilePart", bytes);


         // Read

         s = conn.openInputStream();
         int ch, i = 0, maxSize = 16384;
         while(((ch = s.read())!= -1 ) & (i++ < maxSize)) 
         {
            responseString.append((char) ch);
         }

         conn.close();
         System.out.println(responseString.toString());
         String res = uploadFinishFile(newFileId, bytes);
         if(res.length()>0)
             System.out.println("File uploaded.");
         else
           System.out.println("Upload failed: "+res);
      }
      catch (Exception e)
      {
          System.out.println(e.toString());
      }


}

This is the java code that im trying to convert to j2me:

try {
  HttpClient client = new DefaultHttpClient();
  HttpPost post = new HttpPost(url);
  MultipartEntity me = new MultipartEntity();
  StringBody rfid = new StringBody("" + newFileId);
  StringBody rfb = new StringBody("" + 0);
  InputStreamBody isb = new InputStreamBody(new BufferedInputStream(new FileInputStream(f)), "FilePart");
  me.addPart("resumableFileId", rfid);
  me.addPart("resumableFirstByte", rfb);
  me.addPart("FilePart", isb);

  post.setEntity(me);
  HttpResponse resp = client.execute(post);
  HttpEntity resEnt = resp.getEntity();

  String res = da.uploadFinishFile(login, password, newFileId, DigestUtils.md5Hex(new FileInputStream(f)));
  if(res.isEmpty())
  System.out.println("File uploaded.");
  else
    System.out.println("Upload failed: "+res);
} catch (Exception ex) {
  System.out.println("Upload failed: "+ex.getMessage());
}

Italo Borssatto · Accepted Answer · 2013-11-11 16:51:12Z

1

You are uploading the file passing the parameters as HTTP headers, instead of sending the image in the HTTP message body using multipart file upload, compatible with the code you're converting.

Take a look at HTTP Post multipart file upload in Java ME. You can use the HttpMultipartRequest class and change your code to:

Hashtable params = new Hashtable();
params.put("resumableFileId", "" + newFileId);
params.put("resumableFirstByte", "" + 0);

HttpMultipartRequest req = new HttpMultipartRequest(
    url,
    params,
    "FilePart", "original_filename.png", "image/png", isb.getBytes()
);

byte[] response = req.send();

edited Nov 11, 2013 at 16:51

answered Nov 8, 2013 at 12:05

Italo Borssatto

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1 Comment

Italo Borssatto Over a year ago

@JBCagampan The answer was edited to follow your requirements. Please, let me know if it solves your problem and set as accepted answer if so.

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