Example usage for java.net URL openConnection

List of usage examples for java.net URL openConnection

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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:software.uncharted.util.HTTPUtil.java

public static String post(String urlToRead, String postData) {
    URL url;
    HttpURLConnection conn;/*from   w w  w.  j av  a 2  s  . c om*/
    try {
        url = new URL(urlToRead);
        conn = (HttpURLConnection) url.openConnection();

        conn.setRequestMethod("POST");
        conn.setDoOutput(true);
        conn.setRequestProperty("Content-Type", "application/json");

        DataOutputStream wr = new DataOutputStream(conn.getOutputStream());
        wr.writeBytes(postData);
        wr.flush();
        wr.close();

        ByteArrayOutputStream buffer = new ByteArrayOutputStream();
        int nRead;
        byte[] data = new byte[16384];
        InputStream is = conn.getInputStream();
        while ((nRead = is.read(data, 0, data.length)) != -1) {
            buffer.write(data, 0, nRead);
        }
        buffer.flush();
        return buffer.toString();
    } catch (Exception e) {
        e.printStackTrace();
        System.err.println("Failed to read URL: " + urlToRead + " <" + e.getMessage() + ">");
    }
    return null;
}

From source file:com.jiubang.core.util.HttpUtils.java

/**
 * Open an URL connection. If HTTPS, accepts any certificate even if not
 * valid, and connects to any host name.
 * /*from  w  w w .j  a va 2  s  .c om*/
 * @param url
 *            The destination URL, HTTP or HTTPS.
 * @return The URLConnection.
 * @throws IOException
 * @throws NoSuchAlgorithmException
 * @throws KeyManagementException
 */
private static URLConnection getConnection(URL url)
        throws IOException, NoSuchAlgorithmException, KeyManagementException {
    URLConnection conn = url.openConnection();
    if (conn instanceof HttpsURLConnection) {
        // Trust all certificates
        SSLContext context = SSLContext.getInstance("TLS");
        context.init(new KeyManager[0], TRUST_MANAGER, new SecureRandom());
        SSLSocketFactory socketFactory = context.getSocketFactory();
        ((HttpsURLConnection) conn).setSSLSocketFactory(socketFactory);

        // Allow all hostnames
        ((HttpsURLConnection) conn).setHostnameVerifier(HOSTNAME_VERIFIER);

    }
    conn.setConnectTimeout(SOCKET_TIMEOUT);
    conn.setReadTimeout(SOCKET_TIMEOUT);
    return conn;
}

From source file:com.quackware.handsfreemusic.Utility.java

public static String getSourceCode(URL url) {
    Object content = null;//w w w .  j  av  a2s  . c  om
    try {

        HttpURLConnection uc = (HttpURLConnection) url.openConnection();
        uc.setRequestProperty("User-Agent",
                "Mozilla/5.0 (Windows; U; Windows NT 6.1; ru; rv:1.9.2.4) Gecko/20100513 Firefox/3.6.4");
        uc.connect();
        InputStream stream = uc.getInputStream();
        if (stream != null) {
            content = readStream(uc.getContentLength(), stream);
        } else if ((content = uc.getContent()) != null && content instanceof java.io.InputStream)
            content = readStream(uc.getContentLength(), (java.io.InputStream) content);
        uc.disconnect();

    } catch (Exception ex) {
        return null;
    }
    if (content != null && content instanceof String) {
        String html = (String) content;
        return html;
    } else {
        return null;
    }
}

From source file:com.gabrielluz.megasenaanalyzer.MegaSenaAnalyzer.java

public static byte[] downloadFile(String fileUrl) throws IOException {
    java.net.CookieManager cm;/* ww w. j  a v a 2s .c o m*/
    cm = new java.net.CookieManager();
    java.net.CookieHandler.setDefault(cm);
    URL url = new URL(fileUrl);
    HttpURLConnection httpConn = (HttpURLConnection) url.openConnection();
    int responseCode = httpConn.getResponseCode();
    if (responseCode == HttpURLConnection.HTTP_OK) {
        try (InputStream inputStream = httpConn.getInputStream()) {
            return MegaSenaAnalyzer.unZipIt(inputStream);
        }
    } else {
        System.out.println("No file to download. Server replied HTTP code: " + responseCode);
        httpConn.disconnect();
        return null;
    }
}

From source file:controlador.Red.java

/**
 * Obtencion de un JTree mapeado pasandole una URL de un server FTP.
 * @param url URL formateada de la siguiente manera: protocolo://user:pwd@ip:puerto".
 * @return JTree formateado para hacer un set directamente.
 *//* w w  w .j  a v  a2  s.c  om*/
public static JTree setArbolFTP(URL url) {
    try {
        URLConnection conn = url.openConnection();
        InputStream is = conn.getInputStream();

        JTree tree = new Mapeador().mapearServer(is);

        is.close();
        return tree;
    } catch (IOException ex) {
        System.out.println("Problema al hacer set del ArbolFTP: " + ex.getLocalizedMessage());
    }

    return null;
}

From source file:com.choices.imagecompare.urlsfetcher.ImageUrlsFetcher.java

@Nullable
private static String downloadContentAsString(String urlString) throws IOException {
    InputStream is = null;/*from  ww w  .  ja  v a 2  s .  c  om*/
    try {
        URL url = new URL(urlString);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setRequestProperty("Authorization", IMGUR_CLIENT_ID);
        conn.setReadTimeout(10000 /* milliseconds */);
        conn.setConnectTimeout(15000 /* milliseconds */);
        conn.setRequestMethod("GET");
        conn.setDoInput(true);
        // Starts the query
        conn.connect();
        int response = conn.getResponseCode();
        if (response != SC_OK) {
            FLog.e(TAG, "Album request returned %s", response);
            return null;
        }
        is = conn.getInputStream();
        return readAsString(is);
    } finally {
        if (is != null) {
            is.close();
        }
    }
}

From source file:com.android.dialer.omni.PlaceUtil.java

/**
 * Executes a GET request and return a JSON object
 * @param url The API URL/*from ww w  .  j  a va2s .c  om*/
 * @return the JSON object
 * @throws IOException
 * @throws JSONException
 */
public static JSONObject getJsonRequest(String url) throws IOException, JSONException {
    URL obj = new URL(url);
    HttpURLConnection con = (HttpURLConnection) obj.openConnection();

    con.setRequestMethod("GET");

    if (DEBUG)
        Log.d(TAG, "Getting JSON from: " + url);

    con.setDoOutput(true);
    int responseCode = con.getResponseCode();

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

    while ((inputLine = in.readLine()) != null) {
        response.append(inputLine);
    }
    in.close();

    JSONObject json = new JSONObject(response.toString());
    return json;
}

From source file:com.tubes2.User.userPaket.java

public static ArrayList<String> readUser(String Username) throws IOException {
    String URLi = "https://popping-fire-1228.firebaseio.com/users/";
    ArrayList<String> dataUser = new ArrayList<String>();
    try {//from w  ww.ja va 2  s.co  m
        URL url = new URL(URLi + Username + ".json");
        URLConnection connection = url.openConnection();
        JSONObject jsonUser = new JSONObject(IOUtils.toString(connection.getInputStream()));
        dataUser.add(0, jsonUser.getString("nama"));
        dataUser.add(1, jsonUser.getString("username"));
        dataUser.add(2, jsonUser.getString("password"));
        dataUser.add(3, jsonUser.getString("email"));
        dataUser.add(4, jsonUser.getString("status"));
    } catch (JSONException ex) {

    } catch (IOException ex) {

    }
    return dataUser;
}

From source file:ly.stealth.punxsutawney.Marathon.java

private static JSONObject sendRequest(String uri, String method, JSONObject json) throws IOException {
    URL url = new URL(Marathon.url + uri);
    HttpURLConnection c = (HttpURLConnection) url.openConnection();
    try {/*from   w w  w.  jav a2  s.  c o  m*/
        c.setRequestMethod(method);

        if (method.equalsIgnoreCase("POST")) {
            byte[] body = json.toString().getBytes("utf-8");
            c.setDoOutput(true);
            c.setRequestProperty("Content-Type", "application/json");
            c.setRequestProperty("Content-Length", "" + body.length);
            c.getOutputStream().write(body);
        }

        return (JSONObject) JSONValue.parse(new InputStreamReader(c.getInputStream(), "utf-8"));
    } catch (IOException e) {
        if (c.getResponseCode() == 404 && method.equals("GET"))
            return null;

        ByteArrayOutputStream response = new ByteArrayOutputStream();
        InputStream err = c.getErrorStream();
        if (err == null)
            throw e;

        Util.copyAndClose(err, response);
        IOException ne = new IOException(e.getMessage() + ": " + response.toString("utf-8"));
        ne.setStackTrace(e.getStackTrace());
        throw ne;
    } finally {
        c.disconnect();
    }
}

From source file:Main.java

public static synchronized boolean isConnect(String url) {
    URL urlStr;
    HttpURLConnection connection;
    if (url == null || url.length() <= 0) {
        return false;
    }//w  w  w  .  ja  v  a  2  s .  com
    try {
        urlStr = new URL(url);
        connection = (HttpURLConnection) urlStr.openConnection();
        int state = connection.getResponseCode();
        if (state == 200) {
            return true;
        }
    } catch (Exception ex) {
        return false;
    }
    return false;
}