Example usage for java.net URL openConnection

Introduction

In this page you can find the example usage for java.net URL openConnection.

Prototype

public URLConnection openConnection() throws java.io.IOException

Source Link

Document

Returns a java.net.URLConnection URLConnection instance that represents a connection to the remote object referred to by the URL .

Usage

From source file:javaphpmysql.JavaPHPMySQL.java

public static void sendPost() {
    //Creamos un objeto JSON
    JSONObject jsonObj = new JSONObject();
    //Aadimos el nombre, apellidos y email del usuario
    jsonObj.put("nombre", nombre);
    jsonObj.put("apellidos", apellidos);
    jsonObj.put("email", email);
    //Creamos una lista para almacenar el JSON
    List l = new LinkedList();
    l.addAll(Arrays.asList(jsonObj));
    //Generamos el String JSON
    String jsonString = JSONValue.toJSONString(l);
    System.out.println("JSON GENERADO:");
    System.out.println(jsonString);
    System.out.println("");

    try {/*from   ww w . j  a v a 2s .c om*/
        //Codificar el json a URL
        jsonString = URLEncoder.encode(jsonString, "UTF-8");
        //Generar la URL
        String url = SERVER_PATH + "listenPost.php";
        //Creamos un nuevo objeto URL con la url donde queremos enviar el JSON
        URL obj = new URL(url);
        //Creamos un objeto de conexin
        HttpURLConnection con = (HttpURLConnection) obj.openConnection();
        //Aadimos la cabecera
        con.setRequestMethod("POST");
        con.setRequestProperty("User-Agent", USER_AGENT);
        con.setRequestProperty("Accept-Language", "en-US,en;q=0.5");
        //Creamos los parametros para enviar
        String urlParameters = "json=" + jsonString;
        // Enviamos los datos por POST
        con.setDoOutput(true);
        DataOutputStream wr = new DataOutputStream(con.getOutputStream());
        wr.writeBytes(urlParameters);
        wr.flush();
        wr.close();
        //Capturamos la respuesta del servidor
        int responseCode = con.getResponseCode();
        System.out.println("\nSending 'POST' request to URL : " + url);
        System.out.println("Post parameters : " + urlParameters);
        System.out.println("Response Code : " + responseCode);

        BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
        String inputLine;
        StringBuffer response = new StringBuffer();

        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        //Mostramos la respuesta del servidor por consola
        System.out.println(response);
        //cerramos la conexin
        in.close();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

From source file:com.meetingninja.csse.database.GroupDatabaseAdapter.java

private static String sendSingleEdit(String payload) throws IOException {
    String _url = getBaseUri().build().toString();
    URL url = new URL(_url);
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    conn.setRequestMethod(IRequest.PUT);
    addRequestHeader(conn, false);//from   w  w w .  ja v a  2  s.co  m
    sendPostPayload(conn, payload);
    return getServerResponse(conn);

}

From source file:mobisocial.musubi.social.FacebookFriendFetcher.java

public static byte[] getImageFromURL(String remoteUrl) {
    try {//  w w w  .j av  a  2s . co  m
        // Grab the content
        URL url = new URL(remoteUrl);
        URLConnection ucon = url.openConnection();
        InputStream is = ucon.getInputStream();

        // Read the content chunk by chunk
        BufferedInputStream bis = new BufferedInputStream(is, 8192);
        ByteArrayBuffer baf = new ByteArrayBuffer(0);
        byte[] chunk = new byte[CHUNK_SIZE];
        int current = bis.read(chunk);
        while (current != -1) {
            baf.append(chunk, 0, current);
            current = bis.read(chunk);
        }
        return baf.toByteArray();
    } catch (IOException e) {
        Log.e(TAG, "HTTP error", e);
    }
    return null;
}

From source file:subhan.portal.config.Util.java

public static void downloadFromUrl(String downloadUrl, String fileName) throws IOException {
    File root = android.os.Environment.getExternalStorageDirectory(); // path ke sdcard

    File dir = new File(root.getAbsolutePath() + "/youread"); // path ke folder

    if (dir.exists() == false) { // cek folder eksistensi
        dir.mkdirs(); // kalau belum ada, dibuat
    }/*from ww  w.j  av  a  2  s.c om*/

    URL url = new URL(downloadUrl); // you can write here any link
    File file = new File(dir, fileName);

    // Open a connection to that URL. 
    URLConnection ucon = url.openConnection();

    // Define InputStreams to read from the URLConnection. 
    InputStream is = ucon.getInputStream();
    BufferedInputStream bis = new BufferedInputStream(is);

    // Read bytes to the Buffer until there is nothing more to read(-1).
    ByteArrayBuffer baf = new ByteArrayBuffer(5000);
    int current = 0;
    while ((current = bis.read()) != -1) {
        baf.append((byte) current);
    }

    // Convert the Bytes read to a String. 
    FileOutputStream fos = new FileOutputStream(file);
    fos.write(baf.toByteArray());
    fos.flush();
    fos.close();
}

From source file:com.rmtheis.yandtran.YandexTranslatorAPI.java

/**
 * Forms an HTTPS request, sends it using GET method and returns the result of the request as a String.
 * /*w  w w.  ja va 2  s . co  m*/
 * @param url The URL to query for a String response.
 * @return The translated String.
 * @throws Exception on error.
 */
private static String retrieveResponse(final URL url) throws Exception {
    final HttpsURLConnection uc = (HttpsURLConnection) url.openConnection();
    if (referrer != null)
        uc.setRequestProperty("referer", referrer);
    uc.setRequestProperty("Content-Type", "text/plain; charset=" + ENCODING);
    uc.setRequestProperty("Accept-Charset", ENCODING);
    uc.setRequestMethod("GET");

    try {
        final int responseCode = uc.getResponseCode();
        final String result = inputStreamToString(uc.getInputStream());
        if (responseCode != 200) {
            throw new Exception("Error from Yandex API: " + result);
        }
        return result;
    } finally {
        if (uc != null) {
            uc.disconnect();
        }
    }
}