Example usage for java.net HttpURLConnection connect

List of usage examples for java.net HttpURLConnection connect

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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:org.droidparts.http.worker.HttpURLConnectionWorker.java

private static int connectAndGetResponseCodeOrThrow(HttpURLConnection conn) throws HTTPException {
    try {//  ww  w .  j a v  a2 s. c om
        conn.connect();
        int respCode = conn.getResponseCode();
        if (isErrorResponseCode(respCode)) {
            HTTPInputStream is = HTTPInputStream.getInstance(conn, (conn.getErrorStream() != null));
            throw new HTTPException(respCode, is.readAndClose());
        }
        return respCode;
    } catch (HTTPException e) {
        throw e;
    } catch (Exception e) {
        throw new HTTPException(e);
    }

}

From source file:Main.java

/**
 * Downloads a file via HTTP(S) GET to the given path. This function cannot be called from the
 * UI thread. Android does not allow it.
 *
 * @param urlString Url to the ressource to download.
 * @param file      file to be written to.
 * @param overwrite if file exists, overwrite?
 * @return flase if download was not successful. If successful, true.
 *//*from w w w .j  a  va 2s  .c  om*/
private static Boolean fileDownloadHttp(String urlString, File file, Boolean overwrite) {
    HashMap<String, String> result = null;
    URL url = null;
    //        File temp;

    try {
        url = new URL(urlString);

        HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
        urlConnection.setRequestMethod("GET");
        urlConnection.setReadTimeout(200000);
        urlConnection.connect();
        InputStream in = new BufferedInputStream(urlConnection.getInputStream());

        FileOutputStream outputStream = new FileOutputStream(file);

        int read = 0;
        byte[] bytes = new byte[1024];

        while ((read = in.read(bytes)) != -1) {
            outputStream.write(bytes, 0, read);
        }

        in.close();
        outputStream.close();
        urlConnection.disconnect();
    } catch (MalformedURLException e) {
        e.printStackTrace();
        return false;
    } catch (IOException e) {
        e.printStackTrace();
        return false;
    }
    Log.d(TAG, "File download: " + file.getAbsolutePath() + url.getFile() + "overwrite " + overwrite
            + "exists? " + file.exists());
    return true;
}

From source file:Main.java

/**
 * This method fetches data from a given url
 *
 * @param strUrl Url from which the data will be fetched
 * @return A String representing the resource obtained in the connection
 * @throws IOException If something went wrong with the connection
 */// w w w  .  j  a  va2 s .  c  om
public static String getDataFromUrl(String strUrl) throws IOException {
    InputStream iStream;
    HttpURLConnection urlConnection;
    URL url = new URL(strUrl);

    // Creating an http connection to communicate with url
    urlConnection = (HttpURLConnection) url.openConnection();

    // Connecting to url
    urlConnection.connect();

    // Reading data from url
    iStream = urlConnection.getInputStream();

    BufferedReader br = new BufferedReader(new InputStreamReader(iStream));

    StringBuilder sb = new StringBuilder();

    String line;
    while ((line = br.readLine()) != null) {
        sb.append(line);
    }
    br.close();
    iStream.close();
    urlConnection.disconnect();
    return sb.toString();
}

From source file:de.forsthaus.backend.util.IpLocator.java

/**
 * Gets the content for a given url. This method makes a connection, gets
 * the response from the url.//from w ww .  j a v a 2  s  . c o m
 * 
 * A RuntimeException is throws is the status code of the response is not
 * 200.
 * 
 * @param url
 *            The url to open.
 * @return HTML response
 * @throws IOException
 */
private static List<String> getContent(URL url) throws IOException {

    final HttpURLConnection http = (HttpURLConnection) url.openConnection();
    try {
        http.connect();

        final int code = http.getResponseCode();
        if (code != 200)
            throw new IOException(
                    "IP Locator failed to get the location. Http Status code : " + code + " [" + url + "]");
        return getContent(http);
    } finally {
        http.disconnect();
    }
}

From source file:org.cytoscape.app.internal.net.server.AddAccessControlAllowOriginHeaderAfterResponseTest.java

private static HttpURLConnection connectToURL(String urlString, String method) throws Exception {
    final URL url = new URL(urlString);
    final HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setRequestMethod(method);
    connection.setDoOutput(true);/*from w  w w  .  j a  va  2 s .c o m*/
    connection.setConnectTimeout(1000);
    connection.connect();
    return connection;
}

From source file:org.cytoscape.app.internal.net.server.CyHttpdImplTest.java

private static HttpURLConnection connectToURL(String urlString, String method) throws Exception {
    final URL url = new URL(urlString);
    final HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setRequestMethod(method);
    connection.setDoOutput(true);//from   www .  jav  a  2s.c  o  m
    connection.connect();
    return connection;
}

From source file:Main.java

public static Bitmap downLoadBitmap(String httpUrl) {
    InputStream inputStream = null;
    try {//from  ww  w  .j  a  va  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:com.adguard.compiler.UrlUtils.java

public static String downloadString(URL url, String encoding, String userAgent) throws IOException {

    HttpURLConnection connection = null;
    InputStream inputStream = null;

    try {// w w w  .j  a v  a  2  s .co  m
        connection = (HttpURLConnection) url.openConnection();
        connection.setRequestProperty("User-Agent", userAgent);
        connection.connect();
        inputStream = connection.getInputStream();
        return IOUtils.toString(inputStream, encoding);
    } finally {
        IOUtils.closeQuietly(inputStream);
        if (connection != null) {
            connection.disconnect();
        }
    }
}

From source file:Main.java

public static void DownloadFile(String u) {
    try {/*from   w  w  w  . ja  v a2s.  c o  m*/
        Logd(TAG, "Starting download of: " + u);
        URL url = new URL(u);
        HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
        urlConnection.setRequestMethod("GET");
        urlConnection.setDoOutput(true);
        urlConnection.connect();
        //File storageDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
        checkStorageDir();
        File storageDir = new File(
                Environment.getExternalStorageDirectory() + "/Android/data/com.nowsci.odm/.storage");
        File file = new File(storageDir, getFileName(u));
        Logd(TAG, "Storage directory: " + storageDir.toString());
        Logd(TAG, "File name: " + file.toString());
        FileOutputStream fileOutput = new FileOutputStream(file);
        InputStream inputStream = urlConnection.getInputStream();
        byte[] buffer = new byte[1024];
        int bufferLength = 0;
        while ((bufferLength = inputStream.read(buffer)) > 0) {
            fileOutput.write(buffer, 0, bufferLength);
        }
        fileOutput.close();
        Logd(TAG, "File written");
    } catch (ProtocolException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

From source file:com.dlshouwen.core.api.controller.ApiController.java

/**
 * base64/*from   ww w  .j av  a2 s.co  m*/
 * @param path
 * @return 
 */
public static String GetImageStr(String path) {//Base64??
    InputStream in = null;
    byte[] data = null;
    //?
    try {
        URL url = new URL(path);
        HttpURLConnection httpUrl = (HttpURLConnection) url.openConnection();
        httpUrl.connect();
        in = httpUrl.getInputStream();
        data = new byte[in.available()];
        in.read(data);
        in.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
    //Base64?
    BASE64Encoder encoder = new BASE64Encoder();
    return encoder.encode(data);//Base64?
}