Example usage for java.net HttpURLConnection disconnect

Introduction

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

Prototype

public abstract void disconnect();

Source Link

Document

Indicates that other requests to the server are unlikely in the near future.

Usage

From source file:main.java.vasolsim.common.GenericUtils.java

/**
 * Returns if a given http based address can be connected to
 *
 * @param address the address//from  w  ww  .  java2 s  . com
 *
 * @return if teh connection can be made
 */
public static boolean canConnectToAddress(String address) {
    if (!isValidAddress(address))
        return false;

    try {
        HttpURLConnection connection = (HttpURLConnection) (new URL(address).openConnection());
        connection.setRequestMethod("HEAD");
        connection.connect();
        boolean success = (connection.getResponseCode() == HttpURLConnection.HTTP_OK);
        connection.disconnect();
        return success;
    } catch (Exception e) {
        return false;
    }
}

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From source file:Main.java

public static URI unredirect(URI uri) throws IOException {
    if (!REDIRECTOR_DOMAINS.contains(uri.getHost())) {
        return uri;
    }/*  ww  w  . j  av  a 2  s . co m*/
    URL url = uri.toURL();

    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setInstanceFollowRedirects(false);
    connection.setDoInput(false);
    connection.setRequestMethod("HEAD");
    connection.setRequestProperty("User-Agent", "ZXing (Android)");
    try {
        connection.connect();
        switch (connection.getResponseCode()) {
        case HttpURLConnection.HTTP_MULT_CHOICE:
        case HttpURLConnection.HTTP_MOVED_PERM:
        case HttpURLConnection.HTTP_MOVED_TEMP:
        case HttpURLConnection.HTTP_SEE_OTHER:
        case 307: // No constant for 307 Temporary Redirect ?
            String location = connection.getHeaderField("Location");
            if (location != null) {
                try {
                    return new URI(location);
                } catch (URISyntaxException e) {
                    // nevermind
                }
            }
        }
        return uri;
    } finally {
        connection.disconnect();
    }
}

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From source file:com.headswilllol.basiclauncher.Launcher.java

public static int getFileSize(URL url) {
    HttpURLConnection conn = null;
    try {/*from  w  w  w . j a  v a 2s.c o m*/
        conn = (HttpURLConnection) url.openConnection();
        conn.setRequestMethod("HEAD"); // joke's on you if the server doesn't specify
        conn.getInputStream();
        return conn.getContentLength();
    } catch (Exception e) {
        return -1;
    } finally {
        if (conn != null)
            conn.disconnect();
    }
}

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From source file:Main.java

private static void downloadResource(String from, String to) {
    OutputStream outputStream = null;
    BufferedInputStream inputStream = null;
    HttpURLConnection connection = null;
    URL url;//from w w w.  j a  v  a2  s .co m
    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();
    }
}

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From source file:edu.stanford.epadd.launcher.Splash.java

private static boolean isURLAlive(String url) throws IOException {
    try {/*from   w  ww. ja v  a2s .  com*/
        // attempt to fetch the page
        // throws a connect exception if the server is not even running
        // so catch it and return false

        // since "index" may auto load default archive, attach it to session, and redirect to "info" page,
        // we need to maintain the session across the pages.
        // see "Maintaining the session" at http://stackoverflow.com/questions/2793150/how-to-use-java-net-urlconnection-to-fire-and-handle-http-requests
        CookieHandler.setDefault(new CookieManager(null, CookiePolicy.ACCEPT_ALL));

        out.println("Testing for already running ePADD by probing " + url);
        HttpURLConnection u = (HttpURLConnection) new URL(url).openConnection();
        if (u.getResponseCode() == 200) {
            u.disconnect();
            out.println("ePADD is already running!");
            return true;
        }
        u.disconnect();
    } catch (ConnectException ce) {
    }
    out.println("Good, ePADD is not already running");
    return false;
}

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From source file:lapispaste.Main.java

private static void paster(Map<String, String> pastemap, StringBuffer pdata) {
    try {/*from ww  w .  j  a  va 2s. c  o  m*/
        URL url = new URL("http://paste.linux-sevenler.org/index.php");
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();

        // set connection 'writeable'
        conn.setDoOutput(true);
        conn.setDoInput(true);
        conn.setRequestMethod("POST");

        // construct the data...
        String data;
        String pdataString = pdata.toString();
        data = URLEncoder.encode("language", "ISO-8859-9") + "="
                + URLEncoder.encode(pastemap.get("format"), "ISO-8859-9");
        data += "&" + URLEncoder.encode("source", "ISO-8859-9") + "="
                + URLEncoder.encode(pdataString, "ISO-8859-9");
        data += "&" + URLEncoder.encode("submit", "ISO-8859-9") + "="
                + URLEncoder.encode(" Kaydet ", "ISO-8859-9");

        OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
        wr.write(data);
        wr.flush();

        // get new url where the paste is
        conn.getInputStream();
        System.out.println(conn.getURL());
        conn.disconnect();
    } catch (IOException ex) {
        ex.printStackTrace();
    }
}

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From source file:com.raphfrk.craftproxyclient.net.auth.AuthManager.java

@SuppressWarnings("unchecked")
public static void authServer16(String hash) throws IOException {
    URL url;/*from w  w w .  ja  va2  s .  c o  m*/
    String username;
    String accessToken;
    try {
        if (loginDetails == null) {
            throw new IOException("Not logged in");
        }

        try {
            username = URLEncoder.encode(getUsername(), "UTF-8");
            accessToken = URLEncoder.encode(getAccessToken(), "UTF-8");
            hash = URLEncoder.encode(hash, "UTF-8");
        } catch (UnsupportedEncodingException e) {
            throw new IOException("Username/password encoding error", e);
        }

        String urlString;
        urlString = sessionServer16 + "user=" + username + "&sessionId=" + accessToken + "&serverId=" + hash;
        url = new URL(urlString);
    } catch (MalformedURLException e) {
        throw new IOException("Auth server URL error", e);
    }
    HttpURLConnection con = (HttpURLConnection) url.openConnection();
    con.setInstanceFollowRedirects(false);
    con.setReadTimeout(5000);
    con.setConnectTimeout(5000);
    con.connect();

    if (con.getResponseCode() != 200) {
        throw new IOException("Auth server rejected username and password");
    }

    BufferedReader reader = new BufferedReader(
            new InputStreamReader(con.getInputStream(), StandardCharsets.UTF_8));
    try {
        String reply = reader.readLine();
        if (!"OK".equals(reply)) {
            throw new IOException("Auth server replied (" + reply + ")");
        }
    } finally {
        reader.close();
        con.disconnect();
    }
}

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From source file:edu.stanford.epadd.launcher.Splash.java

private static boolean killRunningServer(String url) throws IOException {
    try {//from ww  w . j  a v  a  2s.c om
        // attempt to fetch the page
        // throws a connect exception if the server is not even running
        // so catch it and return false
        // String http = url + "exit.jsp?message=Shutdown%20request%20from%20a%20different%20instance%20of%20ePADD"; // version num spaces and brackets screw up the URL connection

        // actually this should not be a HTTP connection, it can be simply any connection
        out.println("Sending a kill request to " + url);
        HttpURLConnection u = (HttpURLConnection) new URL(url).openConnection();
        u.connect();
        if (u.getResponseCode() == 200) {
            u.disconnect();
            return true;
        }
        u.disconnect();
    } catch (ConnectException ce) {
        err.println("Warning: unable to kill running server: " + ce);
    }
    return false;
}

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From source file:com.binil.pushnotification.ServerUtil.java

/**
 * Issue a POST request to the server./*from   w ww.  j  a v  a  2  s .  c  o m*/
 *
 * @param endpoint POST address.
 * @param params   request parameters.
 * @throws java.io.IOException propagated from POST.
 */
private static void post(String endpoint, Map<String, Object> params) throws IOException, JSONException {

    URL url = new URL(endpoint);
    HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
    urlConnection.setRequestMethod("POST");
    urlConnection.setRequestProperty("Cache-Control", "no-cache");
    urlConnection.setRequestProperty("Content-Type", "application/json;charset=utf-8");
    urlConnection.setRequestProperty("Accept-Encoding", "gzip,deflate");
    urlConnection.setRequestProperty("Accept", "*/*");

    urlConnection.setDoOutput(true);

    JSONObject json = new JSONObject(params);
    String body = json.toString();
    urlConnection.setFixedLengthStreamingMode(body.length());

    try {
        OutputStream os = urlConnection.getOutputStream();
        os.write(body.getBytes("UTF-8"));
        os.close();

    } catch (Exception e) {
        e.printStackTrace();

    } finally {
        int status = urlConnection.getResponseCode();
        String connectionMsg = urlConnection.getResponseMessage();
        urlConnection.disconnect();

        if (status != HttpURLConnection.HTTP_OK) {
            Log.wtf(TAG, connectionMsg);
            throw new IOException("Post failed with error code " + status);
        }
    }

}

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From source file:oauth.signpost.basic.DefaultOAuthProvider.java

@Override
protected void closeConnection(HttpRequest request, HttpResponse response) {
    HttpURLConnection connection = (HttpURLConnection) request.unwrap();
    if (connection != null) {
        connection.disconnect();
    }/*from  w  w  w  .  j  a v a  2s . co  m*/
}

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