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:com.zhonghui.tool.controller.HttpClient.java

/**
 * HTTP Post???// ww w .j a v a2  s  .  c o m
 *
 * @param connection 
 * @param message ???
 * @throws IOException
 */
private void requestServer(final URLConnection connection, String message, String encoder) throws Exception {
    PrintStream out = null;
    try {
        connection.connect();
        out = new PrintStream(connection.getOutputStream(), false, encoder);
        out.print(message);
        out.flush();
    } catch (Exception e) {
        throw e;
    } finally {
        if (null != out) {
            out.close();
        }
    }
}

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From source file:org.xenmaster.monitoring.engine.Slot.java

public URLConnection getConnection() {
    try {/*from   ww w.j  a  v a 2s  .  c  om*/
        if (connection == null || connectToUpdates) {
            Host host = new Host(reference);
            URL url;
            if (connectToUpdates) {
                url = new URL("http://" + host.getAddress().getCanonicalHostName() + "/rrd_updates?start="
                        + ((lastPolled - 5000) / 1000) + "&host=true");
            } else {
                url = new URL("http://" + host.getAddress().getCanonicalHostName() + "/host_rrd");
                connectToUpdates = true;
            }

            URLConnection uc = url.openConnection();
            byte[] auth = (Settings.getInstance().getString("Xen.User") + ':'
                    + Settings.getInstance().getString("Xen.Password")).getBytes("UTF-8");
            uc.setRequestProperty("Authorization", "Basic " + new String(Base64.encodeBase64(auth)));
            uc.connect();

            lastPolled = System.currentTimeMillis();
            connection = uc;
        }
    } catch (Exception ex) {
        busy = false;
        Logger.getLogger(getClass()).error("Failed to retrieve statistics", ex);
    }

    return connection;
}

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From source file:com.alfaariss.oa.authentication.remote.aselect.idp.storage.config.IDPConfigStorage.java

/**
 * @see com.alfaariss.oa.engine.idp.storage.configuration.AbstractConfigurationStorage#createIDP(com.alfaariss.oa.api.configuration.IConfigurationManager, org.w3c.dom.Element)
 *//*from w  w w .j  a  v  a 2 s .com*/
@Override
protected IIDP createIDP(IConfigurationManager configManager, Element config) throws OAException {
    ASelectIDP oASelectIDP = null;
    try {
        String sServerID = configManager.getParam(config, "server_id");
        if (sServerID == null) {
            _logger.error("No 'server_id' parameter found in configuration");
            throw new OAException(SystemErrors.ERROR_CONFIG_READ);
        }

        String sOrganizationID = configManager.getParam(config, "id");
        if (sOrganizationID == null) {
            _logger.error("No 'id' parameter found in configuration");
            throw new OAException(SystemErrors.ERROR_CONFIG_READ);
        }

        String sFriendlyname = configManager.getParam(config, "friendlyname");
        if (sFriendlyname == null) {
            _logger.error("No 'friendlyname' parameter found in configuration");
            throw new OAException(SystemErrors.ERROR_CONFIG_READ);
        }

        String sURL = configManager.getParam(config, "url");
        if (sURL == null) {
            _logger.error("No 'url' parameter found in configuration");
            throw new OAException(SystemErrors.ERROR_CONFIG_READ);
        }
        URL urlTarget = null;
        try {
            urlTarget = new URL(sURL);
        } catch (MalformedURLException e) {
            _logger.error("Invalid 'url' parameter found in configuration: " + sURL);
            throw new OAException(SystemErrors.ERROR_CONFIG_READ);
        }

        try {
            URLConnection urlConnection = urlTarget.openConnection();
            urlConnection.setConnectTimeout(3000);
            urlConnection.setReadTimeout(3000);
            urlConnection.connect();
        } catch (IOException e) {
            _logger.warn("Could not connect to 'url' parameter found in configuration: " + sURL);
        }

        String sLevel = configManager.getParam(config, "level");
        if (sLevel == null) {
            _logger.error("No 'level' parameter found in configuration");
            throw new OAException(SystemErrors.ERROR_CONFIG_READ);
        }

        int iLevel;
        try {
            iLevel = Integer.parseInt(sLevel);
        } catch (NumberFormatException e) {
            _logger.error("Invalid 'level' parameter found in configuration, not a number: " + sLevel);
            throw new OAException(SystemErrors.ERROR_INIT);
        }

        String sCountry = configManager.getParam(config, "country");
        if (sCountry == null)
            _logger.info("No optional 'country' parameter found in configuration");

        String sLanguage = configManager.getParam(config, "language");
        if (sLanguage == null)
            _logger.info("No optional 'language' parameter found in configuration");

        boolean bDoSigning = false;
        String sSigning = configManager.getParam(config, "signing");
        if (sSigning != null) {
            if (sSigning.equalsIgnoreCase("TRUE"))
                bDoSigning = true;
            else if (!sSigning.equalsIgnoreCase("FALSE")) {
                _logger.error("Invalid 'signing' parameter found in configuration, must be 'true' or 'false': "
                        + sSigning);
                throw new OAException(SystemErrors.ERROR_INIT);
            }
        }

        boolean bASynchronousLogout = false;
        String sASynchronousLogout = configManager.getParam(config, "asynchronouslogout");
        if (sASynchronousLogout != null) {
            if (sASynchronousLogout.equalsIgnoreCase("TRUE"))
                bASynchronousLogout = true;
            else if (!sASynchronousLogout.equalsIgnoreCase("FALSE")) {
                _logger.error(
                        "Invalid 'asynchronouslogout' parameter found in configuration, must be 'true' or 'false': "
                                + sASynchronousLogout);
                throw new OAException(SystemErrors.ERROR_INIT);
            }
        }

        boolean bSynchronousLogout = false;
        String sSynchronousLogout = configManager.getParam(config, "synchronouslogout");
        if (sSynchronousLogout != null) {
            if (sSynchronousLogout.equalsIgnoreCase("TRUE"))
                bSynchronousLogout = true;
            else if (!sSynchronousLogout.equalsIgnoreCase("FALSE")) {
                _logger.error(
                        "Invalid 'synchronouslogout' parameter found in configuration, must be 'true' or 'false': "
                                + sSynchronousLogout);
                throw new OAException(SystemErrors.ERROR_INIT);
            }
        }

        boolean bSendArpTarget = false;
        String sSendArpTarget = configManager.getParam(config, "send_arp_target");
        if (sSendArpTarget != null) {
            if (sSendArpTarget.equalsIgnoreCase("TRUE"))
                bSendArpTarget = true;
            else if (!sSendArpTarget.equalsIgnoreCase("FALSE")) {
                _logger.error(
                        "Invalid 'send_arp_target' parameter found in configuration, must be 'true' or 'false': "
                                + sSigning);
                throw new OAException(SystemErrors.ERROR_INIT);
            }
        }

        oASelectIDP = new ASelectIDP(sOrganizationID, sFriendlyname, sServerID, sURL, iLevel, bDoSigning,
                sCountry, sLanguage, bASynchronousLogout, bSynchronousLogout, bSendArpTarget);
    } catch (OAException e) {
        throw e;
    } catch (Exception e) {
        _logger.fatal("Internal error during create", e);
        throw new OAException(SystemErrors.ERROR_INTERNAL, e);
    }
    return oASelectIDP;
}

---

From source file:piuk.blockchain.android.ui.WalletActivity.java

private void checkVersionAndTimeskewAlert() {
    new Thread() {
        @Override//from   w ww.  j a v  a 2  s .  c  om
        public void run() {
            try {
                final int versionCode = getWalletApplication().applicationVersionCode();
                final URLConnection connection = new URL(Constants.VERSION_URL + "?current=" + versionCode)
                        .openConnection();
                connection.connect();
                final long serverTime = connection.getHeaderFieldDate("Date", 0);
                final InputStream is = connection.getInputStream();
                final BufferedReader reader = new BufferedReader(new InputStreamReader(is));
                // final String version = reader.readLine();
                reader.close();

                if (serverTime > 0) {
                    final long diffMinutes = Math.abs((System.currentTimeMillis() - serverTime) / 1000 / 60);

                    if (diffMinutes >= 60) {
                        runOnUiThread(new Runnable() {
                            public void run() {
                                if (!isFinishing())
                                    timeskewAlert(diffMinutes);
                            }
                        });
                    }
                }
            } catch (final Exception x) {
                x.printStackTrace();
            }
        }
    }.start();
}

---

From source file:org.pentaho.reporting.libraries.resourceloader.loader.URLResourceData.java

private void readMetaData() throws IOException {
    if (metaDataOK) {
        if ((System.currentTimeMillis() - lastDateMetaDataRead) < URLResourceData.getFixedCacheDelay()) {
            return;
        }//from   w  w w.  j av a 2 s  .c  om
        if (isFixBrokenWebServiceDateHeader()) {
            return;
        }

    }

    final URLConnection c = url.openConnection();
    c.setDoOutput(false);
    c.setAllowUserInteraction(false);
    if (c instanceof HttpURLConnection) {
        final HttpURLConnection httpURLConnection = (HttpURLConnection) c;
        httpURLConnection.setRequestMethod("HEAD");
    }
    c.connect();
    readMetaData(c);
    c.getInputStream().close();
}

---

From source file:org.bireme.interop.fromJson.Json2Couch.java

private void sendDocuments(final String docs) {
    try {//from  w w w .  j a va2s .co m
        assert docs != null;

        final URLConnection connection = url.openConnection();
        connection.setRequestProperty("CONTENT-TYPE", "application/json");
        connection.setRequestProperty("Accept", "application/json");
        connection.setDoOutput(true);
        connection.setDoInput(true);
        connection.connect();

        try (OutputStreamWriter out = new OutputStreamWriter(connection.getOutputStream())
        //final String udocs = URLEncoder.encode(docs, "UTF-8");
        ) {
            out.write(docs);
        }

        try (InputStreamReader reader = new InputStreamReader(connection.getInputStream())) {
            final List<String> msgs = getBadDocuments(reader);

            for (String msg : msgs) {
                System.err.println("write error: " + msg);
            }
        }
    } catch (IOException ex) {
        Logger.getLogger(Json2Couch.class.getName()).log(Level.SEVERE, null, ex);
    }
}

---

From source file:org.atricore.idbus.bundles.apache.tiles.OsgiDefinitionsFactory.java

/**
 * Creates and returns a {@link Definitions} set by reading
 * configuration data from the applied sources.
 *
 * @return The definitions holder object, filled with base definitions.
 * @throws DefinitionsFactoryException if an error occurs reading the
 * sources.//from   www.  j  a  v a  2 s .  co m
 */
public Definitions readDefinitions() throws DefinitionsFactoryException {
    Definitions definitions = createDefinitions();
    try {
        for (Object source1 : sources) {
            URL source = (URL) source1;
            URLConnection connection = source.openConnection();
            connection.connect();
            lastModifiedDates.put(source.toExternalForm(), connection.getLastModified());
            Map<String, Definition> defsMap = reader.read(connection.getInputStream());
            definitions.addDefinitions(defsMap);
        }
    } catch (IOException e) {
        throw new DefinitionsFactoryException("I/O error accessing source.", e);
    }
    return definitions;
}

---

From source file:org.atricore.idbus.bundles.apache.tiles.OsgiDefinitionsFactory.java

/**
 * Indicates whether the DefinitionsFactory is out of date and needs to be
 * reloaded.//  ww  w .  j a  v a 2  s . com
 *
 * @return If the factory needs refresh.
 */
public boolean refreshRequired() {
    boolean status = false;

    Set<String> urls = lastModifiedDates.keySet();

    try {
        for (String urlPath : urls) {
            Long lastModifiedDate = lastModifiedDates.get(urlPath);
            URL url = new URL(urlPath);
            URLConnection connection = url.openConnection();
            connection.connect();
            long newModDate = connection.getLastModified();
            if (newModDate != lastModifiedDate) {
                status = true;
                break;
            }
        }
    } catch (Exception e) {
        logger.warn("Exception while monitoring update times.", e);
        return true;
    }
    return status;
}

---

From source file:org.wso2.es.integration.common.utils.AssetsRESTClient.java

/**
 * This method is used to retrieve assets via publisher assets list endpoint
 *
 * @param sessionId String of valid session ID
 * @return JSON ARRAY of gadgets/*  w  ww .  j a  va  2s  .c  o m*/
 */
private JsonArray getAssets(String sessionId) throws IOException {
    BufferedReader input = null;
    String listAssetsEndpoint = getBaseUrl() + PUBLISHER_APIS_LIST_GADGETS_ENDPOINT;
    //construct endpoint which retrieves list of gadgets
    try {
        if (LOG.isDebugEnabled()) {
            LOG.debug("Get Assets via REST endpoint using sessionID: " + sessionId);
        }
        URL endpointUrl = new URL(listAssetsEndpoint);
        URLConnection urlConn = endpointUrl.openConnection();
        urlConn.setRequestProperty("Accept", "application/json");
        urlConn.setRequestProperty(COOKIE, JSESSIONID + "=" + sessionId + ";");
        // SessionId Cookie
        urlConn.connect();
        //GET response data
        input = new BufferedReader(new InputStreamReader(urlConn.getInputStream()));
        JsonElement elem = parser.parse(input);

        // parse response to a JasonArray
        return elem.getAsJsonObject().getAsJsonArray(ASSET_LIST_KEY);
    } catch (MalformedURLException e) {
        LOG.error(getAssetRetrievingErrorMassage(listAssetsEndpoint), e);
        throw e;
    } catch (IOException e) {
        LOG.error(getAssetRetrievingErrorMassage(listAssetsEndpoint), e);
        throw e;
    } finally {
        if (input != null) {
            try {
                input.close();// will close the URL connection as well
            } catch (IOException e) {
                LOG.error("Failed to close the connection", e);
            }
        }
    }
}

---

From source file:count.ly.messaging.ConnectionProcessor.java

@Override
public void run() {
    while (true) {
        final String[] storedEvents = store_.connections();
        if (storedEvents == null || storedEvents.length == 0) {
            // currently no data to send, we are done for now
            break;
        }/*from   www .j  a v  a  2s. c o  m*/

        // get first event from collection
        if (deviceId_.getId() == null) {
            // When device ID is supplied by OpenUDID or by Google Advertising ID.
            // In some cases it might take time for them to initialize. So, just wait for it.
            if (Countly.sharedInstance().isLoggingEnabled()) {
                Log.i(Countly.TAG, "No Device ID available yet, skipping request " + storedEvents[0]);
            }
            break;
        }
        final String eventData = storedEvents[0] + "&device_id=" + deviceId_.getId();

        URLConnection conn = null;
        BufferedInputStream responseStream = null;
        try {
            // initialize and open connection
            conn = urlConnectionForEventData(eventData);
            conn.connect();

            // consume response stream
            responseStream = new BufferedInputStream(conn.getInputStream());
            final ByteArrayOutputStream responseData = new ByteArrayOutputStream(256); // big enough to handle success response without reallocating
            int c;
            while ((c = responseStream.read()) != -1) {
                responseData.write(c);
            }

            // response code has to be 2xx to be considered a success
            boolean success = true;
            if (conn instanceof HttpURLConnection) {
                final HttpURLConnection httpConn = (HttpURLConnection) conn;
                final int responseCode = httpConn.getResponseCode();
                success = responseCode >= 200 && responseCode < 300;
                if (!success && Countly.sharedInstance().isLoggingEnabled()) {
                    Log.w(Countly.TAG, "HTTP error response code was " + responseCode
                            + " from submitting event data: " + eventData);
                }
            }

            // HTTP response code was good, check response JSON contains {"result":"Success"}
            if (success) {
                final JSONObject responseDict = new JSONObject(responseData.toString("UTF-8"));
                success = responseDict.optString("result").equalsIgnoreCase("success");
                if (!success && Countly.sharedInstance().isLoggingEnabled()) {
                    Log.w(Countly.TAG, "Response from Countly server did not report success, it was: "
                            + responseData.toString("UTF-8"));
                }
            }

            if (success) {
                if (Countly.sharedInstance().isLoggingEnabled()) {
                    Log.d(Countly.TAG, "ok ->" + eventData);
                }

                // successfully submitted event data to Count.ly server, so remove
                // this one from the stored events collection
                store_.removeConnection(storedEvents[0]);
            } else {
                // warning was logged above, stop processing, let next tick take care of retrying
                break;
            }
        } catch (Exception e) {
            if (Countly.sharedInstance().isLoggingEnabled()) {
                Log.w(Countly.TAG, "Got exception while trying to submit event data: " + eventData, e);
            }
            // if exception occurred, stop processing, let next tick take care of retrying
            break;
        } finally {
            // free connection resources
            if (responseStream != null) {
                try {
                    responseStream.close();
                } catch (IOException ignored) {
                }
            }
            if (conn != null && conn instanceof HttpURLConnection) {
                ((HttpURLConnection) conn).disconnect();
            }
        }
    }
}

---

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