Dataoutputstream gives me a ‘Java io. IOException: unexpected end of stream ‘?

I'm trying to use httpurlconnection to send a request from an Android application to WebService But sometimes it works, sometimes it doesn't work

When I try to send this value:

JSON value

{"Calle":"Calle Pérez 105","DetalleDireccion":"","HoraPartida":"May 18,2014 9:17:10 AM","Numero":0,"PuntoPartidaLat":18.477295994621315,"PuntoPartidaLon":-69.93638522922993,"Sector":"Main Sector"}

I have an "unexpected end of stream" exception in the dataoutputstream closing function

This is my code:

DataOutputStream printout;
// String json;
byte[] bytes;
DataInputStream input;

URL serverUrl = null;
try {
    serverUrl = new URL(Config.APP_SERVER_URL + URL);
} catch (MalformedURLException e) {
    ...
} 

bytes = json.getBytes();
try {

    httpCon = (HttpURLConnection) serverUrl.openConnection();
    httpCon.setDoOutput(true);
    httpCon.setUseCaches(false);
    httpCon.setFixedLengthStreamingMode(bytes.length);
    httpCon.setRequestProperty("Authorization",tokenType + " "+ accessToken);
    httpCon.setRequestMethod("POST");
    httpCon.setRequestProperty("Content-Type","application/json");

    printout = new DataOutputStream(httpCon.getOutputStream());
    printout.writeBytes(json);
    printout.flush();
    printout.close();
    ...
}

Solution

Here are the solutions for the following changes:

It gets rid of dataoutputstream, which is of course the wrong use. > It sets and passes the content length correctly. > It does not rely on any default values for encoding, but explicitly sets UTF-8 in two places

Try:

// String json;

URL serverUrl = null;
try {
    serverUrl = new URL(Config.APP_SERVER_URL + URL);
} catch (MalformedURLException e) {
    ...
} 

try {
    byte[] bytes = json.getBytes("UTF-8");

    httpCon = (HttpURLConnection) serverUrl.openConnection();
    httpCon.setDoOutput(true);
    httpCon.setUseCaches(false);
    httpCon.setFixedLengthStreamingMode(bytes.length);
    httpCon.setRequestProperty("Authorization","application/json; charset=UTF-8");

    OutputStream os = httpCon.getOutputStream();
    os.write(bytes);
    os.close();

    ...
}