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:Main.java

public static InputStream getInputStreamFromUrl(String urlStr) throws MalformedURLException, IOException {
    URL url = new URL(urlStr);
    HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
    InputStream inputStream = urlConn.getInputStream();
    return inputStream;
}

From source file:Main.java

public static boolean isExists(String urlString) {
    try {//  w  w  w  .  j  a  v  a  2s .c  om
        URL u = new URL(urlString);
        HttpURLConnection huc = (HttpURLConnection) u.openConnection();
        huc.setRequestMethod("GET");
        huc.connect();
        int rc = huc.getResponseCode();
        return (rc == HttpURLConnection.HTTP_OK);
        // Handle response code here...
    } catch (UnknownHostException uhe) {
        // Handle exceptions as necessary
        Log.w("EPub", uhe.getMessage());
    } catch (FileNotFoundException fnfe) {
        // Handle exceptions as necessary
        Log.w("EPub", fnfe.getMessage());
    } catch (Exception e) {
        // Handle exceptions as necessary
        Log.w("EPub", e.getMessage());
    }
    return false;
}

From source file:Main.java

public static int getRequest(String link) throws IOException {
    URL url = new URL(link);
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    System.out.println(connection.getResponseCode());
    if (connection.getResponseCode() == HttpURLConnection.HTTP_OK || connection.getResponseCode() == 302) {
        InputStream is = connection.getInputStream();
        setParsedString(convertInputStreamToString(is));
    }/*from   ww  w  .ja  v a2 s  . co m*/
    return connection.getResponseCode();
}

From source file:Main.java

public static String download(String urlStr) {
    StringBuffer sb = new StringBuffer();
    String line = null;/*from   w w w.  j a  v a  2 s.com*/
    BufferedReader buffer = null;
    try {
        URL url = new URL(urlStr);
        HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
        buffer = new BufferedReader(new InputStreamReader(urlConn.getInputStream()));
        while ((line = buffer.readLine()) != null) {
            sb.append(line);
        }
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        try {
            buffer.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    return sb.toString();
}

From source file:Main.java

static private BitmapDrawable bitmapDrawableFromURL(Resources resources, String str_url, boolean scale, int w,
        int h) {//from w  w w.  jav  a  2  s .  c  o  m
    if (str_url == null || str_url.length() <= 0)
        return null;

    BitmapDrawable thumb = null;
    try {
        URL url = new URL(str_url);
        URLConnection connection = url.openConnection();
        connection.connect();

        InputStream stream = connection.getInputStream();
        BufferedInputStream data = new BufferedInputStream(stream);

        Bitmap bitmap = BitmapFactory.decodeStream(data);
        if (bitmap != null) {
            if (scale)
                thumb = new BitmapDrawable(resources, Bitmap.createScaledBitmap(bitmap, w, h, true));
            else
                thumb = new BitmapDrawable(resources, bitmap);
        }

    } catch (MalformedURLException e) {
        //e.printStackTrace();
    } catch (IOException e) {
        //e.printStackTrace();
    }

    return thumb;
}

From source file:Main.java

/**
 * Given a string url, connects and returns response code
 *
 * @param urlString       string to fetch
 * @param readTimeOutMs       read time out
 * @param connectionTimeOutMs       connection time out
 * @param urlRedirect       should use urlRedirect
 * @param useCaches       should use cache
 * @return httpResponseCode http response code
 * @throws IOException/*w  w w  . j av a  2s  . c o m*/
 */

public static int checkUrlWithOptions(String urlString, int readTimeOutMs, int connectionTimeOutMs,
        boolean urlRedirect, boolean useCaches) throws IOException {
    URL url = new URL(urlString);
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setReadTimeout(readTimeOutMs /* milliseconds */);
    connection.setConnectTimeout(connectionTimeOutMs /* milliseconds */);
    connection.setRequestMethod("GET");
    connection.setInstanceFollowRedirects(urlRedirect);
    connection.setUseCaches(useCaches);
    // Starts the query
    connection.connect();
    int responseCode = connection.getResponseCode();
    connection.disconnect();
    return responseCode;
}

From source file:Main.java

public static byte[] getBytes(String url) {
    try {/* w ww .  j  a v a 2s . c o m*/
        URL u = new URL(url);
        HttpURLConnection connection = (HttpURLConnection) u.openConnection();
        connection.setRequestMethod("GET");
        connection.setRequestProperty("Charset", "UTF-8");
        InputStream is = connection.getInputStream();
        int contentLength = connection.getContentLength();
        byte[] data = new byte[contentLength];
        int alreadyRead = 0;
        int len = 0;
        while (alreadyRead < contentLength) {
            len = is.read(data, alreadyRead, contentLength - alreadyRead);
            alreadyRead += len;
        }
        is.close();
        return data;
    } catch (Exception e) {
        e.printStackTrace();
        return null;
    }

}

From source file:com.mycompany.test.Jaroop.java

/**
 * @throws MalformedURLException/*from w  w  w  .j  a  v  a2  s  . c  om*/
 * @throws ProtocolException
 * @throws IOException
 * This method obtains the HTTP connection required in order to make a GET request.
 */
private static HttpURLConnection getConnection(String url)
        throws MalformedURLException, ProtocolException, IOException {
    URL urlObject = new URL(url);
    HttpURLConnection connection = (HttpURLConnection) urlObject.openConnection();
    connection.setRequestMethod("GET");
    return connection;
}

From source file:Main.java

public static String requestData(String address) throws Exception {
    URL url = new URL(address);
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setRequestMethod("GET");
    connection.setConnectTimeout(5000);/*  w  w w  .j  a v a 2 s  .c om*/
    connection.setReadTimeout(5000);
    String data = null;
    InputStream is = null;
    if (connection.getResponseCode() == 200) {
        is = connection.getInputStream();
        data = readFromStream(is);
    }
    if (is != null) {
        is.close();
    }
    return data;
}

From source file:Main.java

public static Bitmap getBitmapAndScale(String url, int requiredSize) {
    Bitmap bm = null;//from w  ww . j a v  a2 s . c  o m
    try {
        URL aURL = new URL(url);
        URLConnection conn = aURL.openConnection();
        conn.connect();
        InputStream is = conn.getInputStream();

        // Decode image size
        BitmapFactory.Options o = new BitmapFactory.Options();
        o.inJustDecodeBounds = true;
        BitmapFactory.decodeStream(is, null, o);
        // The new size we want to scale to

        // Find the correct scale value. It should be the power of 2.
        int width_tmp = o.outWidth, height_tmp = o.outHeight;
        int scale = 1;
        while (true) {
            if (width_tmp / 2 < requiredSize || height_tmp / 2 < requiredSize)
                break;
            width_tmp /= 2;
            height_tmp /= 2;
            scale *= 2;
        }
        // Decode with inSampleSize
        BitmapFactory.Options o2 = new BitmapFactory.Options();
        o2.inSampleSize = scale;
        bm = BitmapFactory.decodeStream(is, null, o2);
        return bm;

    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        return bm;

    }
}