Maximum length of content?

Question

I'm trying to connect with a server using HttpURLConnection, but I have a problem with the PUT method.
I need to send a String with 1500 characters (or more), but in this case the server produces a timeout and returns 500 - server internal error.
If I send a String lower than 1400 characters, I have not problem and the server returns OK.

My code is the following:

public String connectToServer(String prototype) {
    String responseString = "";

    try {
        BufferedReader in = new BufferedReader(new InputStreamReader(openURLForInput(new URL(URL), USERNAME, PASSWORD, prototype)));
        String line;
        while ((line = in.readLine()) != null) {
            System.out.println(line);
            responseString += line;
        }

    } catch (IOException e) {
        e.printStackTrace();
        responseString = e.toString();
    }

    return responseString;
}

//-----------------------

public InputStream openURLForInput(URL url, String uname, String pword, String content) throws IOException {
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    conn.setDoInput(true);
    conn.setDoOutput(true);
    conn.setRequestProperty("Authorization", userNamePasswordBase64(uname, pword)); // I know this is OK
    conn.addRequestProperty("Content-type", "application/xml; charset=utf-8");

    //conn.setChunkedStreamingMode(8 * 1024);

    conn.setRequestMethod("PUT");
    conn.connect();

    OutputStream output = conn.getOutputStream();
    OutputStreamWriter osw = new OutputStreamWriter(output, "UTF-8");
    BufferedWriter writer = new BufferedWriter(osw);
    writer.write(content); // content length  > 1400 characters
    writer.close();
    output.close();

    int status = conn.getResponseCode();
    Log.i("STATUS", status + "");
    Log.i("STATUS_ERROR", conn.getResponseMessage());

    return conn.getInputStream();
}

I tryed adding the lines

conn.setFixedLengthStreamingMode(contentLength)
conn.setChunkedStreamingMode(8 * 1024);

But the server's answer is wrong anyway.

UPDATE:

I could detect the problem. For some reason, when I try to send large bodys in the request, the server produces a timeout but not with all networks, only with some networks. I use a secure conection SSL, maybe this can bring problems?

Answer 1

Maybe it's a network MTU problem, I'd say you investigate on that front.

Here's a table relevant to windows:

Network             MTU (bytes)
-------------------------------
16 Mbps Token Ring        17914
4 Mbps Token Ring          4464
FDDI                       4352
Ethernet                   1500
IEEE 802.3/802.2           1492
PPPoE (WAN Miniport)       1480
X.25                        576

Answer 2

I recommand you to use the very helpful HTTP-REQUEST library by Kevin Sawicki...

It helped me a lot of times !

Answer 3

The server is responding 500 - server internal error. So you should check the server implementation. It should have restrictions above that content length.
I have a app that do a lot of server http requests and for me your problem really is the server. The main evidence is that your code works with content lower or equals then 1415 chars.