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:net.line2soft.preambul.utils.Network.java

/**
 * Checks if a connection is possible between device and server.
 * @param address The URL to request//  w  ww  .j  a  va 2  s  . c om
 * @return True if the connection is possible, false else
 */
public static boolean checkConnection(URL address) {
    boolean result = false;
    try {
        HttpURLConnection urlc = (HttpURLConnection) address.openConnection();
        //urlc.setRequestProperty("User-Agent", "Android Application:"+Z.APP_VERSION);
        urlc.setRequestProperty("Connection", "close");
        urlc.setConnectTimeout(1000);
        urlc.connect();
        if (urlc.getResponseCode() == 200) {
            result = true;
        }
    } catch (Exception e) {
        ;
    }
    return result;
}

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From source file:com.blogspot.ryanfx.auth.GoogleUtil.java

/**
 * Sends the auth token to google and gets the json result.
 * @param token auth token//from  w w w.  j  a v a2s. c  o m
 * @return json result if valid request, null if invalid.
 * @throws IOException
 * @throws LoginException
 */
private static String issueTokenGetRequest(String token) throws IOException, LoginException {
    int timeout = 2000;
    URL u = new URL("https://www.googleapis.com/oauth2/v2/userinfo");
    HttpURLConnection c = (HttpURLConnection) u.openConnection();
    c.setRequestMethod("GET");
    c.setRequestProperty("Content-length", "0");
    c.setRequestProperty("Authorization", "OAuth " + token);
    c.setUseCaches(false);
    c.setAllowUserInteraction(false);
    c.setConnectTimeout(timeout);
    c.setReadTimeout(timeout);
    c.connect();
    int status = c.getResponseCode();
    if (status == HttpServletResponse.SC_OK) {
        BufferedReader br = new BufferedReader(new InputStreamReader(c.getInputStream()));
        StringBuilder sb = new StringBuilder();
        String line;
        while ((line = br.readLine()) != null) {
            sb.append(line + "\n");
        }
        br.close();
        return sb.toString();
    } else if (status == HttpServletResponse.SC_UNAUTHORIZED) {
        Logger.getLogger(GoogleUtil.class.getName()).severe("Invalid token request: " + token);
    }
    return null;
}

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From source file:Main.java

private static String httpPost(String address, String params) {
    InputStream inputStream = null;
    HttpURLConnection urlConnection = null;
    try {//from   w  w w. ja va  2 s.c  o  m
        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:com.android.idearse.Result.java

public static Bitmap getBitmapFromURL(String src) {
    try {//from  ww w.  j  a  v a  2  s.  c o m
        URL url = new URL(src);
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setDoInput(true);
        connection.connect();
        InputStream input = connection.getInputStream();
        Bitmap myBitmap = BitmapFactory.decodeStream(input);
        return myBitmap;
    } catch (IOException e) {
        e.printStackTrace();
        return null;
    }
}

---

From source file:lu.list.itis.dkd.aig.util.FusekiHttpHelper.java

/**
 * Check if specified dataset already exists on server
 * /*w  w  w  .  j a v  a  2 s.c  o m*/
 * @param dataSetName
 * @return boolean true if the dataset already exits, false if not
 * @throws IOException
 * @throws HttpException
 */
public static boolean chechIfExist(String dataSetName) throws IOException, HttpException {
    boolean exists = false;
    URL url = new URL(HOST + "/$/datasets/" + dataSetName);
    final HttpURLConnection httpConnection = (HttpURLConnection) url.openConnection();
    httpConnection.setUseCaches(false);
    httpConnection.setRequestMethod("GET");

    // handle HTTP/HTTPS strange behaviour
    httpConnection.connect();
    httpConnection.disconnect();

    // handle response
    switch (httpConnection.getResponseCode()) {
    case HttpURLConnection.HTTP_OK:
        exists = true;
        break;
    case HttpURLConnection.HTTP_NOT_FOUND:
        break;
    default:
        throw new HttpException(
                httpConnection.getResponseCode() + " message: " + httpConnection.getResponseMessage());
    }
    return exists;
}

---

From source file:fr.haploid.webservices.WebServicesHelper.java

protected static synchronized WebServicesResponseData downloadFromServer(String url, JSONObject params,
        String type) {/*from  w w w . j  av a  2s . c  o  m*/

    int responseCode = 9999;

    StringBuffer buffer = new StringBuffer();

    Uri.Builder builder = new Uri.Builder();
    builder.encodedPath(url);

    JSONArray namesOfParams = params.names();

    for (int i = 0; i < namesOfParams.length(); i++) {
        try {
            String param = namesOfParams.getString(i);
            builder.appendQueryParameter(param, params.get(param).toString());
        } catch (JSONException e) {
            return new WebServicesResponseData("JSONException " + e.toString(), responseCode, false);
        }
    }

    URL urlBuild;

    try {
        urlBuild = new URL(builder.build().toString());
    } catch (MalformedURLException e) {
        return new WebServicesResponseData("MalformedURLException " + e.toString(), responseCode, false);
    }

    try {
        HttpURLConnection urlConnection = (HttpURLConnection) urlBuild.openConnection();
        try {
            urlConnection.setRequestMethod(type);
        } catch (ProtocolException e) {
            return new WebServicesResponseData("ProtocolException " + e.toString(), responseCode, false);
        }

        urlConnection.connect();
        responseCode = urlConnection.getResponseCode();
        if (responseCode < 400) {
            InputStream inputStream = urlConnection.getInputStream();
            if (inputStream == null) {
                return new WebServicesResponseData(null, responseCode, false);
            }
            BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));

            String line;
            while ((line = reader.readLine()) != null) {
                buffer.append(line + "\n");
            }

            if (buffer.length() == 0) {
                return new WebServicesResponseData(null, responseCode, false);
            }
        }
    } catch (IOException e) {
        return new WebServicesResponseData("IOException " + e.toString(), responseCode, false);
    }
    return new WebServicesResponseData(buffer.toString(), responseCode, true);
}

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From source file:dictinsight.utils.io.HttpUtils.java

public static String getDataFromOtherServer(String url) {
    String rec = null;/*from   w ww . j ava 2  s .co m*/
    BufferedReader reader = null;
    HttpURLConnection connection = null;
    try {
        URL srcUrl = new URL(url);
        connection = (HttpURLConnection) srcUrl.openConnection();
        connection.setConnectTimeout(1000 * 10);
        connection.connect();
        reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
        rec = reader.readLine();
    } catch (Exception e) {
        System.out.println("get date from " + url + " error!");
        e.printStackTrace();
    } finally {
        if (reader != null) {
            try {
                reader.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        if (connection != null)
            connection.disconnect();
    }
    return rec;
}

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From source file:com.brobwind.brodm.NetworkUtils.java

public static void deviceInfo(String path, OnMessage callback) {
    try {/*w ww. j  a v  a  2  s  .c  o m*/
        URL url = new URL(path + "/privet/info");
        HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
        urlConnection.setRequestProperty("Authorization", "Basic anonymous");
        urlConnection.setRequestProperty("Content-Type", "application/json");
        urlConnection.connect();
        try {
            InputStream in = new BufferedInputStream(urlConnection.getInputStream());
            BufferedReader bufReader = new BufferedReader(new InputStreamReader(in));
            StringBuilder sb = new StringBuilder();
            for (String line = bufReader.readLine(); line != null;) {
                sb.append(line).append("\n");
                line = bufReader.readLine();
            }

            callback.onMessage(sb.toString(), null);
            return;
        } finally {
            urlConnection.disconnect();
        }
    } catch (MalformedURLException muex) {
        Log.e(TAG, "Malformed url: " + path);
        callback.onMessage(null, muex.getMessage());
    } catch (Exception e) {
        e.printStackTrace();
        callback.onMessage(null, e.getMessage());
    }
}

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From source file:Main.java

public static String deleteUrl(String url, Bundle params) throws MalformedURLException, IOException {
    System.setProperty("http.keepAlive", "false");
    HttpURLConnection conn = (HttpURLConnection) new URL(url).openConnection();
    conn.setRequestProperty("User-Agent", System.getProperties().getProperty("http.agent") + " agent");
    conn.setRequestMethod("DELETE");
    conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
    conn.setDoOutput(false);/*from  w  ww  . j ava  2  s.  c  om*/
    conn.setDoInput(true);
    //conn.setRequestProperty("Connection", "Keep-Alive");
    conn.connect();

    String response = "";
    try {
        response = read(conn.getInputStream());
    } catch (FileNotFoundException e) {
        // Error Stream contains JSON that we can parse to a FB error
        response = read(conn.getErrorStream());
    }
    return response;
}

---

From source file:Main.java

public static String getHtml(String getUrl, int outtime, String charsetName) {
    String html = "";
    URL url;//from w  ww. j  a  va  2 s.co  m
    try {
        url = new URL(getUrl);
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setRequestProperty("User-Agent",
                "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; InfoPath.1; CIBA)");
        // connection.setRequestProperty("Connection", "Keep-Alive");
        // connection.setRequestProperty("Cache-Control", "no-cache");
        connection.setConnectTimeout(outtime);
        connection.connect();
        InputStream inStrm = connection.getInputStream();

        BufferedReader br = new BufferedReader(new InputStreamReader(inStrm, charsetName));
        String temp = "";

        while ((temp = br.readLine()) != null) {
            html = html + (temp + '\n');
        }
        try {
            br.close();
        } catch (Exception e) {
            // TODO: handle exception
        }
        try {
            connection.disconnect();
        } catch (Exception e) {
            // TODO: handle exception
        }
    } catch (Exception e) {
        e.printStackTrace();
    }

    return html;
}

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