Example usage for java.net HttpURLConnection connect

Introduction

In this page you can find the example usage for java.net HttpURLConnection connect.

Prototype

public abstract void connect() throws IOException;

Source Link

Document

Opens a communications link to the resource referenced by this URL, if such a connection has not already been established.

Usage

From source file:edu.xjtu.qxcamerabridge.LiveviewImageExtractor.java

private static InputStream getLiveviewInputStream(String liveviewURL)
        throws MalformedURLException, IOException {
    URL url = new URL(liveviewURL);
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setRequestMethod("GET");
    connection.setReadTimeout(2000);//from   w  ww .ja  va2s.  c om
    connection.connect();

    if (connection.getResponseCode() == HttpURLConnection.HTTP_OK) {
        return connection.getInputStream();
    }
    return null;
}

From source file:com.android.feedmeandroid.HTTPClient.java

public static Bitmap downloadFile(final String fileUrl) {
    final Bitmap[] bitmap = new Bitmap[1];
    Thread t = new Thread(new Runnable() {
        public void run() {
            URL myFileUrl = null;
            try {
                myFileUrl = new URL(fileUrl);
            } catch (MalformedURLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();//  w  ww .ja  va2s .  co m
            }
            try {
                HttpURLConnection conn = (HttpURLConnection) myFileUrl.openConnection();
                conn.setDoInput(true);
                conn.connect();
                InputStream is = conn.getInputStream();

                Bitmap bmImg = BitmapFactory.decodeStream(is);
                bitmap[0] = bmImg;
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    });
    t.start();
    try {
        t.join();
    } catch (InterruptedException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    return bitmap[0];
}

From source file:Main.java

public static boolean isConnectionAvailable() {
    class NetworkCheckTask extends AsyncTask<Void, Void, Boolean> {

        @Override//w  w  w  . j  av a  2s  . c o  m
        protected Boolean doInBackground(Void... params) {
            try {
                URL url = new URL(MAD_SERVER + "/sync.html");
                HttpURLConnection conn = null;
                conn = (HttpURLConnection) url.openConnection();
                conn.setConnectTimeout(999);
                conn.setRequestMethod("GET");
                conn.setDoInput(true);
                conn.connect();
                if (conn.getResponseCode() == 200)
                    return true;
                else
                    return false;
            } catch (Exception e) {
                return false;
            }
        }

    }

    try {
        NetworkCheckTask async = new NetworkCheckTask();
        async.execute();
        return async.get();
    } catch (Exception e) {
        return false;
    }
}

From source file:com.mopaas_mobile.http.BaseHttpRequester.java

public static String doGET(String urlstr, List<BasicNameValuePair> params) throws IOException {
    String result = null;/*from  ww  w. j a  v  a  2s .c o  m*/
    String content = "";
    for (int i = 0; i < params.size(); i++) {
        content = content + "&" + URLEncoder.encode(((NameValuePair) params.get(i)).getName(), "UTF-8") + "="
                + URLEncoder.encode(((NameValuePair) params.get(i)).getValue(), "UTF-8");
    }
    URL url = new URL(urlstr + "?" + content.substring(1));
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setDoInput(true);
    connection.setRequestMethod("GET");
    connection.setUseCaches(false);
    connection.connect();
    InputStream is = connection.getInputStream();
    BufferedReader br = new BufferedReader(new InputStreamReader(is, "UTF-8"));

    StringBuffer b = new StringBuffer();
    int ch;
    while ((ch = br.read()) != -1) {
        b.append((char) ch);
    }
    result = b.toString().trim();
    connection.disconnect();
    return result;
}

From source file:Main.java

public static String jsonGetRequest(String urlQueryString) {
    String json = null;//from  w  w w  . j  a  v  a  2s  .  c o  m
    try {
        URL url = new URL(urlQueryString);
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setDoOutput(true);
        connection.setInstanceFollowRedirects(false);
        connection.setRequestMethod("GET");
        connection.setRequestProperty("Content-Type", "application/json");
        connection.setRequestProperty("charset", "utf-8");
        connection.connect();
        InputStream inStream = connection.getInputStream();
        json = streamToString(inStream); // input stream to string
    } catch (IOException ex) {
        ex.printStackTrace();
    }
    return json;
}

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

public static String getSourceCode(URL url) {
    Object content = null;//from  w  w  w.  j a va  2s.c o m
    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:jfix.util.Urls.java

/**
 * Returns true if given url can be connected via HTTP within given timeout
 * (specified in seconds). Otherwise the url might be broken.
 *///from  www  .  ja va  2  s .  c om
public static boolean isConnectable(String url, int timeout) {
    try {
        URLConnection connection = new URL(url).openConnection();
        if (connection instanceof HttpURLConnection) {
            HttpURLConnection httpConnection = (HttpURLConnection) connection;
            httpConnection.setConnectTimeout(timeout * 1000);
            httpConnection.setReadTimeout(timeout * 1000);
            httpConnection.connect();
            int response = httpConnection.getResponseCode();
            httpConnection.disconnect();
            return response == HttpURLConnection.HTTP_OK;
        }
    } catch (Exception e) {
        return false;
    }
    return false;
}

From source file:jfix.util.Urls.java

/**
 * Returns the status code for connecting given url with given timeout.
 * Returns 0 if an IOException occurs./*from  w  w w  . j a v  a 2s  .co m*/
 */
public static int getStatus(String url, int timeout) {
    try {
        URLConnection connection = new URL(url).openConnection();
        if (connection instanceof HttpURLConnection) {
            HttpURLConnection httpConnection = (HttpURLConnection) connection;
            httpConnection.setConnectTimeout(timeout * 1000);
            httpConnection.setReadTimeout(timeout * 1000);
            httpConnection.connect();
            int response = httpConnection.getResponseCode();
            httpConnection.disconnect();
            return response;
        }
    } catch (IOException e) {
        // pass
    }
    return 0;
}

From source file:com.teleca.jamendo.util.download.DownloadTask.java

public static Boolean downloadFile(DownloadJob job) throws IOException {

    // TODO rewrite to apache client

    PlaylistEntry mPlaylistEntry = job.getPlaylistEntry();
    String mDestination = job.getDestination();

    URL u = new URL(mPlaylistEntry.getTrack().getStream());
    HttpURLConnection c = (HttpURLConnection) u.openConnection();
    c.setRequestMethod("GET");
    c.setDoOutput(true);/*from   ww  w .j a  v a2 s .c  om*/
    c.connect();
    job.setTotalSize(c.getContentLength());

    Log.i(JamendoApplication.TAG, "creating file");

    String path = DownloadHelper.getAbsolutePath(mPlaylistEntry, mDestination);
    String fileName = DownloadHelper.getFileName(mPlaylistEntry, job.getFormat());

    try {
        // Create multiple directory
        boolean success = (new File(path)).mkdirs();
        if (success) {
            Log.i(JamendoApplication.TAG, "Directory: " + path + " created");
        }

    } catch (Exception e) {//Catch exception if any
        Log.e(JamendoApplication.TAG, "Error creating folder", e);
        return false;
    }

    FileOutputStream f = new FileOutputStream(new File(path, fileName));

    InputStream in = c.getInputStream();

    if (in == null) {
        // When InputStream is a NULL
        return false;
    }

    byte[] buffer = new byte[1024];
    int lenght = 0;
    while ((lenght = in.read(buffer)) > 0) {
        f.write(buffer, 0, lenght);
        job.setDownloadedSize(job.getDownloadedSize() + lenght);
    }

    f.close();

    downloadCover(job);
    return true;

}

From source file:Main.java

private static void downloadResource(String from, String to) {
    OutputStream outputStream = null;
    BufferedInputStream inputStream = null;
    HttpURLConnection connection = null;
    URL url;/*w w  w . ja  va  2  s. c om*/
    byte[] buffer = new byte[1024];

    try {
        url = new URL(from);

        connection = (HttpURLConnection) url.openConnection();

        connection.setRequestMethod("GET");
        connection.setDoOutput(true);
        connection.connect();
        outputStream = new FileOutputStream(to);

        inputStream = new BufferedInputStream(url.openStream());
        int read;

        while ((read = inputStream.read(buffer)) > 0) {
            outputStream.write(buffer, 0, read);
        }

    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        if (outputStream != null)
            try {
                outputStream.close();
            } catch (IOException e) {
            }
        if (inputStream != null)
            try {
                inputStream.close();
            } catch (IOException e) {
            }
        if (connection != null)
            connection.disconnect();
    }
}