Example usage for java.net URLConnection connect

Introduction

In this page you can find the example usage for java.net URLConnection 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.hockeyapp.android.tasks.CheckUpdateTask.java

@Override
protected JSONArray doInBackground(Void... args) {
    try {//from w w  w. ja v a2 s  . c  om
        int versionCode = getVersionCode();

        JSONArray json = new JSONArray(VersionCache.getVersionInfo(context));

        if ((getCachingEnabled()) && (findNewVersion(json, versionCode))) {
            HockeyLog.verbose("HockeyUpdate", "Returning cached JSON");
            return json;
        }

        URL url = new URL(getURLString("json"));
        URLConnection connection = createConnection(url);
        connection.connect();

        InputStream inputStream = new BufferedInputStream(connection.getInputStream());
        String jsonString = convertStreamToString(inputStream);
        inputStream.close();

        json = new JSONArray(jsonString);
        if (findNewVersion(json, versionCode)) {
            json = limitResponseSize(json);
            return json;
        }
    } catch (IOException | JSONException e) {
        e.printStackTrace();
    }

    return null;
}

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From source file:org.squale.welcom.addons.access.excel.UpdateAccessManager.java

/**
 * @param url : URL/*from  ww  w  .j ava 2 s.  c  om*/
 * @return La date de dernier emodification de l'url
 */
private Date getTimeUrl(final URL url) {
    try {
        final URLConnection urlCon = url.openConnection();
        urlCon.setUseCaches(false);
        urlCon.connect();
        return new Date(urlCon.getLastModified());
    } catch (final IOException e) {
        logStartup.error(e, e);
    }
    return null;
}

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From source file:com.example.HelloLicenseServlet.java

public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
    response.setContentType("text/html; charset=UTF-8");
    UserService userService = UserServiceFactory.getUserService();
    PrintWriter output = response.getWriter();
    String url = request.getRequestURI();

    if (userService.isUserLoggedIn()) {
        // Provide a logout path.
        User user = userService.getCurrentUser();
        output.printf("<strong>%s</strong> | <a href=\"%s\">Sign out</a><br><br>", user.getEmail(),
                userService.createLogoutURL(url));

        try {//from   w  ww. j ava 2  s .  c  om
            // Send a signed request for the user's license state.
            OAuthConsumer oauth = new DefaultOAuthConsumer(CONSUMER_KEY, CONSUMER_SECRET);
            oauth.setTokenWithSecret(TOKEN, TOKEN_SECRET);
            URLConnection http = new URL(
                    String.format(URL, APP_ID, URLEncoder.encode(user.getFederatedIdentity(), "UTF-8")))
                            .openConnection();
            oauth.sign(http);
            http.connect();

            // Convert the response from the license server to a string.
            BufferedReader input = new BufferedReader(new InputStreamReader(http.getInputStream()));
            String file = "";
            for (String line; (line = input.readLine()) != null; file += line)
                ;
            input.close();

            // Parse the string as JSON and display the license state.
            JSONObject json = new JSONObject(file);
            output.printf("Hello <strong>%s</strong> license!",
                    "YES".equals(json.get("result"))
                            ? "FULL".equals(json.get("accessLevel")) ? "full" : "free trial"
                            : "no");
        } catch (Exception exception) {
            // Dump any error.
            output.printf("Oops! <strong>%s</strong>", exception.getMessage());
        }
    } else { // The user isn't logged in.
        // Prompt for login.
        output.printf("<a href=\"%s\">Sign in</a>", userService.createLoginURL(url, null,
                "https://www.google.com/accounts/o8/id", new HashSet<String>()));
    }
}

---

From source file:com.amastigote.xdu.query.module.WaterAndElectricity.java

private void preLogin() throws IOException {
    URL url = new URL(HOST + PRE_LOGIN_SUFFIX);
    URLConnection urlConnection = url.openConnection();
    urlConnection.connect();
    String tmp = urlConnection.getHeaderField("Set-Cookie");

    ASP_dot_NET_SessionId = tmp.substring(tmp.indexOf("=") + 1, tmp.indexOf(";"));
}

---

From source file:org.b5chat.crossfire.web.FaviconServlet.java

private byte[] getImage(String url) {
    try {//from   w  w  w .j av a  2  s  .  c o  m
        // Try to get the fiveicon from the url using an HTTP connection from the pool
        // that also allows to configure timeout values (e.g. connect and get data)
        GetMethod get = new GetMethod(url);
        get.setFollowRedirects(true);
        int response = client.executeMethod(get);
        if (response < 400) {
            // Check that the response was successful. Should we also filter 30* code?
            return get.getResponseBody();
        } else {
            // Remote server returned an error so return null
            return null;
        }
    } catch (IllegalStateException e) {
        // Something failed (probably a method not supported) so try the old stye now
        try {
            URLConnection urlConnection = new URL(url).openConnection();
            urlConnection.setReadTimeout(1000);

            urlConnection.connect();
            DataInputStream di = new DataInputStream(urlConnection.getInputStream());

            ByteArrayOutputStream byteStream = new ByteArrayOutputStream();
            DataOutputStream out = new DataOutputStream(byteStream);

            int len;
            byte[] b = new byte[1024];
            while ((len = di.read(b)) != -1) {
                out.write(b, 0, len);
            }
            di.close();
            out.flush();

            return byteStream.toByteArray();
        } catch (IOException ioe) {
            // We failed again so return null
            return null;
        }
    } catch (IOException ioe) {
        // We failed so return null
        return null;
    }
}

---

From source file:org.squale.welcom.struts.webServer.URLManager.java

/**
 * Retourn l'url a partie d'un site distant
 * /*from ww w .  j  a  v a  2 s  .c o m*/
 * @param pUrl url
 * @throws MalformedURLException problem sur l'url
 * @throws IOException exception
 * @return webfile
 */
private WebFile getWebFileFromHTTP(String pUrl) throws MalformedURLException, IOException {
    WebFile webFile = new WebFile(WebFile.TYPE_DISTANT);
    webFile.setUrl(new URL(pUrl));
    final URLConnection urlcon = webFile.getUrl().openConnection();
    urlcon.setUseCaches(true);
    urlcon.connect();
    webFile.setLastDate(new Date(urlcon.getLastModified()));

    if (urlcon.getLastModified() == 0) {
        webFile.setLastDate(new Date(urlcon.getDate()));
    }

    return webFile;
}

---

From source file:org.esupportail.pay.services.PayBoxService.java

protected String getPayBoxActionUrl() {
    for (String payboxActionUrl : payboxActionUrls) {
        try {/*  w  w  w .  java  2  s  . c  o m*/
            URL url = new URL(payboxActionUrl);
            URLConnection connection = url.openConnection();
            connection.connect();
            connection.getInputStream().read();
            return payboxActionUrl;
        } catch (Exception e) {
            log.warn("Pb with " + payboxActionUrl, e);
        }
    }
    throw new RuntimeException("No paybox action url is available at the moment !");
}

---

From source file:com.aptana.webserver.internal.core.builtin.LocalWebServer.java

private void testConnection(URL url) throws CoreException {
    CoreException exception = null;/*from  w  ww.j  a  va2  s .  c o m*/
    for (int trial = 0; trial < 3; ++trial) {
        try {
            URLConnection connection = url.openConnection(); // $codepro.audit.disable variableDeclaredInLoop
            connection.connect();
            connection.getContentType();
            return;
        } catch (IOException e) {
            exception = new CoreException(new Status(IStatus.ERROR, WebServerCorePlugin.PLUGIN_ID,
                    "Testing WebServer connection failed", e)); //$NON-NLS-1$
        }
        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            break;
        }
    }
    if (exception != null) {
        throw exception;
    }
}

---

From source file:eu.faircode.netguard.ServiceExternal.java

@Override
protected void onHandleIntent(Intent intent) {
    try {//w  w w  . j a  v a2s  .c om
        startForeground(ServiceSinkhole.NOTIFY_EXTERNAL, getForegroundNotification(this));

        Log.i(TAG, "Received " + intent);
        Util.logExtras(intent);

        if (ACTION_DOWNLOAD_HOSTS_FILE.equals(intent.getAction())) {
            final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);

            String hosts_url = prefs.getString("hosts_url", null);
            File tmp = new File(getFilesDir(), "hosts.tmp");
            File hosts = new File(getFilesDir(), "hosts.txt");

            InputStream in = null;
            OutputStream out = null;
            URLConnection connection = null;
            try {
                URL url = new URL(hosts_url);
                connection = url.openConnection();
                connection.connect();

                if (connection instanceof HttpURLConnection) {
                    HttpURLConnection httpConnection = (HttpURLConnection) connection;
                    if (httpConnection.getResponseCode() != HttpURLConnection.HTTP_OK)
                        throw new IOException(
                                httpConnection.getResponseCode() + " " + httpConnection.getResponseMessage());
                }

                int contentLength = connection.getContentLength();
                Log.i(TAG, "Content length=" + contentLength);
                in = connection.getInputStream();
                out = new FileOutputStream(tmp);

                long size = 0;
                byte buffer[] = new byte[4096];
                int bytes;
                while ((bytes = in.read(buffer)) != -1) {
                    out.write(buffer, 0, bytes);
                    size += bytes;
                }

                Log.i(TAG, "Downloaded size=" + size);

                if (hosts.exists())
                    hosts.delete();
                tmp.renameTo(hosts);

                String last = SimpleDateFormat.getDateTimeInstance().format(new Date().getTime());
                prefs.edit().putString("hosts_last_download", last).apply();

                ServiceSinkhole.reload("hosts file download", this, false);

            } catch (Throwable ex) {
                Log.e(TAG, ex.toString() + "\n" + Log.getStackTraceString(ex));

                if (tmp.exists())
                    tmp.delete();
            } finally {
                try {
                    if (out != null)
                        out.close();
                } catch (IOException ex) {
                    Log.e(TAG, ex.toString() + "\n" + Log.getStackTraceString(ex));
                }
                try {
                    if (in != null)
                        in.close();
                } catch (IOException ex) {
                    Log.e(TAG, ex.toString() + "\n" + Log.getStackTraceString(ex));
                }

                if (connection instanceof HttpURLConnection)
                    ((HttpURLConnection) connection).disconnect();
            }
        }
    } finally {
        stopForeground(true);
    }
}

---

From source file:org.tupelo_schneck.electric.ted.ImportIterator.java

public ImportIterator(final Options options, final byte mtu, final int count) throws IOException {
    this.timeZone = options.recordTimeZone;
    this.cal = new GregorianCalendar(this.timeZone);
    this.mtu = mtu;
    this.useVoltage = options.voltage;
    URL url;// w  w  w. j a va 2s.  com
    try {
        url = new URL(
                options.gatewayURL + "/history/rawsecondhistory.raw?INDEX=1&MTU=" + mtu + "&COUNT=" + count);
    } catch (MalformedURLException e) {
        throw new RuntimeException(e);
    }
    URLConnection urlConnection = url.openConnection();
    urlConnection.setConnectTimeout(60000);
    urlConnection.setReadTimeout(60000);
    urlConnection.connect();
    urlStream = urlConnection.getInputStream();
    urlConnection.setReadTimeout(1000);
    getNextLine();

    // skip the first timestamp, in case we see only part of multiple values
    if (!closed) {
        Triple first = nextFromLine();
        Triple next = first;
        while (next != null && next.timestamp == first.timestamp) {
            next = nextFromLine();
        }
        pushback = next;

        if (Util.inDSTOverlap(timeZone, first.timestamp)) {
            int now = (int) (System.currentTimeMillis() / 1000);
            if (now < first.timestamp - 1800)
                inDSTOverlap = 1;
            else
                inDSTOverlap = 2;
        }
        previousTimestamp = first.timestamp;
    }
}

---

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