I am trying to send a zipfile from my android application to our server and I keep getting a 411 length required error.

Here is the code that I am using to do that.

    HttpPost post = new HttpPost("http://www.xyz.org/upload.json");
    post.setHeader(C.constants.HTTP_CONTENT_TYPE, "application/octet-stream");

    try {
        FileInputStream fis = new FileInputStream("/data/data/org.myapp.appname/app_content.zip");

        InputStreamEntity reqEntity = new InputStreamEntity(fis, -1);
        post.setEntity(reqEntity);
        String response = doPost(post);

        Log.v(tag, "response from server " + response);
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    }

What am I doing wrong here and may I also know how I can add more parameters with this post to send them to the server.