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:controllers.IndexServlet.java

private static void Track(HttpServletRequest request, HttpServletResponse response, PrintWriter writer) {
    String userAddress = request.getParameter("userAddress");
    String fileName = request.getParameter("fileName");

    String storagePath = DocumentManager.StoragePath(fileName, userAddress);
    String body = "";

    try {//w  w w  . jav  a 2s. com
        Scanner scanner = new Scanner(request.getInputStream()).useDelimiter("\\A");
        body = scanner.hasNext() ? scanner.next() : "";
    } catch (Exception ex) {
        writer.write("get request.getInputStream error:" + ex.getMessage());
        return;
    }

    if (body.isEmpty()) {
        writer.write("empty request.getInputStream");
        return;
    }

    JSONParser parser = new JSONParser();
    JSONObject jsonObj;

    try {
        Object obj = parser.parse(body);
        jsonObj = (JSONObject) obj;
    } catch (Exception ex) {
        writer.write("JSONParser.parse error:" + ex.getMessage());
        return;
    }

    long status = (long) jsonObj.get("status");

    if (status == 2 || status == 3)//MustSave, Corrupted
    {
        String downloadUri = (String) jsonObj.get("url");

        int saved = 1;
        try {
            URL url = new URL(downloadUri);
            java.net.HttpURLConnection connection = (java.net.HttpURLConnection) url.openConnection();
            InputStream stream = connection.getInputStream();

            if (stream == null) {
                throw new Exception("Stream is null");
            }

            File savedFile = new File(storagePath);
            try (FileOutputStream out = new FileOutputStream(savedFile)) {
                int read;
                final byte[] bytes = new byte[1024];
                while ((read = stream.read(bytes)) != -1) {
                    out.write(bytes, 0, read);
                }

                out.flush();
            }

            connection.disconnect();

        } catch (Exception ex) {
            saved = 0;
        }
    }

    writer.write("{\"error\":0}");
}

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

private static boolean killRunningServer(String url) throws IOException {
    try {/*w  w w  .j  a  v a2 s  . com*/
        // 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
        err.println("Sending a kill request to " + http);
        HttpURLConnection u = (HttpURLConnection) new URL(http).openConnection();
        u.connect();
        if (u.getResponseCode() == 200) {
            u.disconnect();
            return true;
        }
        u.disconnect();
    } catch (ConnectException ce) {
    }
    return false;
}

---

From source file:Main.java

/**
 * Make an HTTP request to the given URL and return a String as the response.
 *//*w w  w  .  ja  v  a2  s  .  c  o m*/
private static String makeHttpRequest(URL url) throws IOException {
    String jsonResponse = "";

    // If the URL is null, then return early.
    if (url == null) {
        return jsonResponse;
    }

    HttpURLConnection urlConnection = null;
    InputStream inputStream = null;
    try {
        urlConnection = (HttpURLConnection) url.openConnection();
        urlConnection.setReadTimeout(10000 /* milliseconds */);
        urlConnection.setConnectTimeout(15000 /* milliseconds */);
        urlConnection.setRequestMethod("GET");
        urlConnection.connect();

        /*
        If the request was successful (response code 200),
        then read the input stream and parse the response.
         */
        if (urlConnection.getResponseCode() == 200) {
            inputStream = urlConnection.getInputStream();
            jsonResponse = readFromStream(inputStream);
        } else {
            //handle exception
        }
    } catch (IOException e) {
        //handle exception
    } finally {
        if (urlConnection != null) {
            urlConnection.disconnect();
        }
        if (inputStream != null) {
            inputStream.close();
        }
    }
    return jsonResponse;
}

---

From source file:msearch.filmeSuchen.sender.MediathekSrf.java

public static boolean ping(String url) throws SRFException {

    url = url.replaceFirst("https", "http"); // Otherwise an exception may be thrown on invalid SSL certificates.

    try {/*w ww . j ava  2 s. c o  m*/
        HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection();
        connection.setConnectTimeout(1000); //1000ms timeout for connect, read timeout to infinity
        connection.setReadTimeout(0);
        int responseCode = connection.getResponseCode();
        connection.disconnect();
        if (responseCode > 399 && responseCode != HttpURLConnection.HTTP_NOT_FOUND) {

            if (responseCode == HttpURLConnection.HTTP_FORBIDDEN) {
                throw new SRFException("TEST");
            }
            //MSLog.debugMeldung("SRF: " + responseCode + " + responseCode " + "Url " + url);
            return false;
        }
        return (200 <= responseCode && responseCode <= 399);

    } catch (IOException exception) {
        return false;
    }
}

---

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;//from w w  w.  j av a 2  s. com
        }

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

    // clean up
    connection.disconnect();

    return imageData;
}

---

From source file:Main.java

private static String httpGet(String address) {
    InputStream inputStream = null;
    HttpURLConnection httpURLConnection = null;
    try {/*from ww  w.  ja  va2  s. c o m*/
        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:Authentication.DinserverAuth.java

public static boolean Login(String nick, String pass, Socket socket) throws IOException {
    boolean logged = false;

    JSONObject authRequest = new JSONObject();
    authRequest.put("username", nick);
    authRequest.put("auth_id", pass);

    String query = "http://127.0.0.1:5000/token";

    URL url = new URL(query);
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    conn.setConnectTimeout(5000);//from   w  w w .  ja  v a  2 s  .co  m
    conn.setRequestProperty("Content-Type", "application/json; charset=UTF-8");
    conn.setDoOutput(true);
    conn.setDoInput(true);
    conn.setRequestMethod("POST");

    OutputStream os = conn.getOutputStream();
    os.write(authRequest.toString().getBytes(Charset.forName("UTF-8")));
    os.close();
    String output = new String();
    StringBuilder sb = new StringBuilder();
    int HttpResult = conn.getResponseCode();
    if (HttpResult == HttpURLConnection.HTTP_OK) {
        output = IOUtils.toString(new InputStreamReader(conn.getInputStream(), Charset.forName("UTF-8")));
    } else {
        System.out.println(conn.getResponseMessage());
    }

    JSONObject jsonObject = new JSONObject(output);
    logged = jsonObject.getBoolean("ok");

    conn.disconnect();

    if (logged) {
        if (DinserverMaster.addUser(nick, socket)) {
            System.out.println("User " + nick + " logged in");
        } else {
            logged = false;
        }
    }
    return logged;
}

---

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

private static boolean isURLAlive(String url) throws IOException {
    try {/*  w ww .  j  a va2  s .  c  o m*/
        // 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);
        System.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;
}

---

From source file:com.surfs.storage.common.util.HttpUtils.java

public static String invokeHttpForGet(String path, String... agrs) throws IOException {
    URL url = new URL(path);
    LogFactory.info("rest url:" + url.toString());
    HttpURLConnection con = null;
    try {/*ww w .  j  av  a  2s  . c  o  m*/
        con = (HttpURLConnection) url.openConnection();
        con.setRequestMethod("GET");
        con.setConnectTimeout(10000);
        con.setReadTimeout(1000 * 60 * 30);
        con.setDoOutput(true);
        con.setDoInput(true);
        con.setUseCaches(false);

        for (String string : agrs) {
            con.setRequestProperty("Content-type", "application/json");
            con.setRequestMethod("POST");
            OutputStream out = con.getOutputStream();
            out.write(string.getBytes("UTF-8"));
        }

        if (con.getResponseCode() != 200)
            throw new ConnectException(con.getResponseMessage());

        InputStream is = con.getInputStream();

        return readResponse(is);

    } catch (IOException e) {
        throw e;
    } finally {
        if (con != null) {
            con.disconnect();
        }
    }
}

---

From source file:core.Utility.java

private static ArrayList<String> getSynonymsWiktionary(String _word) throws MalformedURLException, IOException {
    ArrayList<String> _list = new ArrayList();
    try {//  w ww.j  a  va  2s.co m

        URL url = new URL("http://www.igrec.ca/project-files/wikparser/wikparser.php?word=" + _word
                + "&query=syn&lang=en");
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setRequestMethod("GET");
        conn.setRequestProperty("Accept", "application/json");

        if (conn.getResponseCode() != 200) {
            throw new RuntimeException("Failed : HTTP error code : " + conn.getResponseCode());
        }

        BufferedReader br = new BufferedReader(new InputStreamReader((conn.getInputStream())));

        String output;
        while ((output = br.readLine()) != null) {
            boolean isEmpty = output.contains("No listed synonyms.")
                    || output.contains("ERROR: The Wiktionary API did not return a page for that word.");

            if (isEmpty) {
                conn.disconnect();
                return _list;
            } else {
                String[] arr = output.trim().split(" ");
                for (String s : arr) {
                    if (s.length() > 2) {
                        _list.add(s);
                    }
                }
            }
        }

        conn.disconnect();

    } catch (MalformedURLException e) {
        throw e;
    } catch (IOException e) {
        throw e;
    }
    return _list;
}

---

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