Java Development

[sanghamitra_83]

Hi,

Please Guide me where I am going wrong to post multiple images to the server using http connection along with other data in the request body.

My code snippet to send one image first (Not working):

-----------------------------------------------------------------------------

 InputStream mImagen = this.getClass().getResourceAsStream("avatar_default.png");      
 byte[]   imgData = IOUtilities.streamToBytes(mImagen);

String message1 = "";
           message1 += "AaB03x\r\n";
           message1 += "Content-Disposition: form-data; name=\"avatar\"; filename=\"avatar_default.png\"\r\n";
           message1 += "Content-Type: image/png\r\n";
           message1 += "\r\n";

 String reqStr = "http://myurl/updateProfileDetails.json?data1=smileys&data2=xxxxx";

s = (StreamConnection) Connector.open(reqStr+";deviceside=true",Connector.READ_WRITE);
   httpConn = (HttpConnection) s;

 httpConn.setRequestMethod(HttpConnection.POST);
  httpConn.setRequestProperty("Content-Disposition", "form-data");
  httpConn.setRequestProperty("Content-Type","multipart/form-data;boundary=AaB03x");

      httpConn.setRequestProperty("Content-Length", String.valueOf(imgData.length + message1.length()));     httpConn.setRequestProperty("Accept", "application/json");
    httpConn.setRequestProperty("Connection", "Keep-Alive");
     httpConn.setRequestProperty("Authorization", "Basic " + authHeader);

 os = httpConn.openOutputStream();
      
      os.write(message1.getBytes());
      os.write(imgData, 0, imgData.length);

      os.flush();
      os.close();

[maadani]

Hi @sanghamitra_83

What error do you get?

E.

[sanghamitra_83]

No Error, but the database is not updated. I mean probably the server is not receiving the image data to store.

[sanghamitra_83]

After I set the Content-Length, If I try to check connection.getLength() it is returning -1 always. Why it can't find out the length. I guess that's why the request body is not proper.

[maadani]

I suggest you check your requests with a sniffer.

That way you would know what was sent and what was the respond.

It might be that we are looking at the wrong direction.

E.

[Albert_Anks · Accepted solution]

Hi sanghamitra_83,

I think you have to send all your images via Httpmultipart.

check out this link and use that class in your application. i have already used this class to send one images to server, and it works fine.

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[sanghamitra_83]

Hi

I have tried the same code before too. It works fine for other the data except the image.

it shows a success message as server response, but actually the image doesn't get stores in the database.

Can you guess where could be the issue.

Thanks,

[sanghamitra_83]

Hi,

I realized that before sending the image base64encode was required.

Thanks for the advice anyway.