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

/**
 * Makes a GET call to the server./*from w  w w . ja va2s  .c  o m*/
 * @return The serve response (expected is JSON)
 */
public static String httpGet(String urlStr) {
    try {
        URL url = new URL(urlStr);

        HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
        InputStream in = new BufferedInputStream(urlConnection.getInputStream());
        String r = readStream(in);
        urlConnection.disconnect();
        return r;
    } catch (MalformedURLException e) {
        Log.v("MyLog", "GET: Bad URL");
        e.printStackTrace();
        return "GET: Bad URL";
    } catch (IOException e) {
        Log.v("MyLog", "GET: Bad Con");
        e.printStackTrace();
        return "GET: Bad Con [" + urlStr + "]";
    }
}

From source file:com.uksf.mf.core.utility.ClassNames.java

/**
 * Checks if connection to URL can be established
 * @param url url to check//from  www .j a v  a2 s.  com
 * @return connection state
 * @throws IOException error
 */
private static boolean checkConnection(URL url) throws IOException {
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setRequestMethod("GET");
    connection.setConnectTimeout(1500);
    connection.setReadTimeout(1500);
    connection.setRequestProperty("User-Agent",
            "Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.1.2) Gecko/20090729 Firefox/3.5.2 (.NET CLR 3.5.30729)");
    connection.connect();
    return connection.getResponseCode() == 404;
}

From source file:Main.java

private static String httpGet(String address) {
    InputStream inputStream = null;
    HttpURLConnection httpURLConnection = null;
    try {/*from www. ja  v  a2  s . com*/
        URL url = new URL(address);
        httpURLConnection = (HttpURLConnection) url.openConnection();
        httpURLConnection.connect();
        if (httpURLConnection.getResponseCode() == HttpURLConnection.HTTP_OK) {
            inputStream = httpURLConnection.getInputStream();
            int len = 0;
            byte[] buffer = new byte[1024];
            StringBuffer stringBuffer = new StringBuffer();
            while ((len = inputStream.read(buffer)) != -1) {
                stringBuffer.append(new String(buffer, 0, len));
            }
            return stringBuffer.toString();
        }
    } catch (MalformedURLException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        close(inputStream);
        if (httpURLConnection != null) {
            httpURLConnection.disconnect();
        }

    }

    return null;

}

From source file:Main.java

public static byte[] retrieveImageData_fromUrl(String imageUrl) throws IOException {
    URL url = new URL(imageUrl);
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setRequestProperty("User-Agent",
            System.getProperties().getProperty("http.agent") + " FacebookAndroidSDK");

    // determine the image size and allocate a buffer
    int fileSize = connection.getContentLength();
    byte[] imageData = new byte[fileSize];

    // download the file
    Log.d(TAG, "fetching image " + imageUrl + " (" + fileSize + ")");

    if (fileSize > 0) {

        BufferedInputStream istream = new BufferedInputStream(connection.getInputStream());
        int bytesRead = 0;
        int offset = 0;
        while (bytesRead != -1 && offset < fileSize) {
            bytesRead = istream.read(imageData, offset, fileSize - offset);
            offset += bytesRead;// w w w  .java 2  s. c om
        }

        istream.close();
    } else
        Log.d(TAG, "fileSize is 0! skipping");

    // clean up
    connection.disconnect();

    return imageData;
}

From source file:Main.java

private static String getData(String target, String method, String token) {
    try {/* w ww. j a  v  a  2s.  com*/
        URL url = new URL(target);
        HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();

        if (!TextUtils.isEmpty(token))
            conn.setRequestProperty("Authorization", token);

        conn.setRequestMethod(method);
        conn.connect();

        BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
        String line, data = "";
        while ((line = in.readLine()) != null)
            data += line;
        in.close();

        return data;
    } catch (IOException ignored) {
        ignored.printStackTrace();
    }

    return null;
}

From source file:Main.java

public static final Bitmap fetchAndRescaleBitmap(String uri, int width, int height) throws IOException {
    URL url = new URL(uri);
    HttpURLConnection httpConnection = (HttpURLConnection) url.openConnection();
    httpConnection.setDoInput(true);//from   ww w.  ja v a 2 s.  com
    httpConnection.connect();
    InputStream inputStream = httpConnection.getInputStream();
    int scaleFactor = findScaleFactor(width, height, inputStream);

    httpConnection = (HttpURLConnection) url.openConnection();
    httpConnection.setDoInput(true);
    httpConnection.connect();
    inputStream = httpConnection.getInputStream();
    Bitmap bitmap = scaleBitmap(scaleFactor, inputStream);
    return bitmap;
}

From source file:Main.java

private static String httpPost(String address, String params) {
    InputStream inputStream = null;
    HttpURLConnection urlConnection = null;
    try {/*from  w  w  w .j  a  v  a  2s. c om*/
        URL url = new URL(address);
        urlConnection = (HttpURLConnection) url.openConnection();
        urlConnection.setDoOutput(true);
        urlConnection.setRequestMethod("POST");
        urlConnection.getOutputStream().write(params.getBytes());
        urlConnection.getOutputStream().flush();

        urlConnection.connect();
        if (urlConnection.getResponseCode() == HttpURLConnection.HTTP_OK) {
            inputStream = urlConnection.getInputStream();
            int len = 0;
            byte[] buffer = new byte[1024];
            StringBuffer stringBuffer = new StringBuffer();
            while ((len = inputStream.read(buffer)) != -1) {
                stringBuffer.append(new String(buffer, 0, len));
            }
            return stringBuffer.toString();
        }
    } catch (MalformedURLException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        close(inputStream);
        if (urlConnection != null) {
            urlConnection.disconnect();
        }
    }
    return null;

}

From source file:Main.java

public static Bitmap downLoadBitmap(String httpUrl) {
    InputStream inputStream = null;
    try {/*from  w  w w .ja v  a  2  s  . c o m*/
        URL url = new URL(httpUrl);

        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setRequestMethod("GET");
        conn.setDoInput(true);
        conn.setReadTimeout(5000);
        conn.setConnectTimeout(5000);
        conn.connect();
        int responseCode = conn.getResponseCode();
        if (responseCode == HttpURLConnection.HTTP_OK) {
            inputStream = conn.getInputStream();

            Bitmap bitmap = BitmapFactory.decodeStream(inputStream);

            return bitmap;
        }
    } catch (MalformedURLException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        if (inputStream != null) {
            try {
                inputStream.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    return null;
}

From source file:editor.util.URLUtil.java

public static String sendPost(String url, String data) throws Exception {

    URL obj = new URL(url);
    HttpURLConnection con = (HttpURLConnection) obj.openConnection();

    //add reuqest header
    con.setRequestMethod("POST");

    // Send post request
    con.setDoOutput(true);//ww w . j  a  v a 2  s .c om
    DataOutputStream wr = new DataOutputStream(con.getOutputStream());
    wr.writeBytes(data);
    wr.flush();
    wr.close();

    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();
    return response.toString();
}

From source file:com.peer2gear.nutch.xquery.XQueryParseFilter.java

private static Content createContent(Configuration conf, String urlStr)
        throws FileNotFoundException, IOException {
    String contentType = "text/html";
    URL url = new URL(urlStr);
    URLConnection connection = url.openConnection();
    InputStream is = connection.getInputStream();
    byte bytes[] = IOUtils.toByteArray(is);
    Content content = new Content(urlStr, urlStr, bytes, contentType, new Metadata(), conf);
    return content;
}