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.spinn3r.api.BaseClient.java

protected URLConnection getConnection(String resource) throws IOException {

    URLConnection conn = null;

    try {//from   ww w .  j  a  va  2s.  c  om

        // create the HTTP connection.
        URL request = new URL(resource);
        conn = request.openConnection();

        // set the UserAgent so Spinn3r know which client lib is calling.
        conn.setRequestProperty(USER_AGENT_HEADER, USER_AGENT + "; " + getConfig().getCommandLine());
        conn.setRequestProperty(ACCEPT_ENCODING_HEADER, GZIP_ENCODING);
        conn.setConnectTimeout(20000);
        conn.connect();

    }

    catch (IOException ioe) {

        //create a custom exception message with the right error.
        String message = conn.getHeaderField(null);
        IOException ce = new IOException(message);
        ce.setStackTrace(ioe.getStackTrace());

        throw ce;
    }

    return conn;
}

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From source file:io.github.bonigarcia.wdm.BrowserManager.java

protected InputStream openGitHubConnection(URL driverUrl) throws IOException {
    Proxy proxy = createProxy();//from ww w .  jav a 2 s . c  o  m
    URLConnection conn = proxy != null ? driverUrl.openConnection(proxy) : driverUrl.openConnection();
    conn.setRequestProperty("User-Agent", "Mozilla/5.0");
    conn.addRequestProperty("Connection", "keep-alive");

    String gitHubTokenName = WdmConfig.getString("wdm.gitHubTokenName");
    String gitHubTokenSecret = WdmConfig.getString("wdm.gitHubTokenSecret");
    if (!isNullOrEmpty(gitHubTokenName) && !isNullOrEmpty(gitHubTokenSecret)) {
        String userpass = gitHubTokenName + ":" + gitHubTokenSecret;
        String basicAuth = "Basic " + new String(new Base64().encode(userpass.getBytes()));
        conn.setRequestProperty("Authorization", basicAuth);
    }
    conn.connect();

    return conn.getInputStream();
}

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From source file:convcao.com.caoAgent.convcaoNeptusInteraction.java

/**
 * This method is called whenever the AUVs have reached their destinations and new data is to be sent to the server.<br/>
 * As a result, new destinations will be received and vehicles will travel to the new destinations.
 * @throws Exception If there is a problem communicating with the server.
 *//*  w  w  w  .  ja v a 2s .  c o m*/
public void controlLoop() throws Exception {

    TransferData send = localState();
    if (send == null)
        throw new Exception("Unable to compute local state");

    TransferData receive = new TransferData();

    for (int AUV = 0; AUV < AUVS; AUV++) {
        showText(nameTable.get(AUV) + " is at " + send.Location[AUV][0] + ", " + send.Location[AUV][1] + ", "
                + send.Location[AUV][2]);
    }

    Gson gson = new Gson();
    String json = gson.toJson(send);

    PrintWriter writer = null;
    writer = new PrintWriter(SessionID + "_Data.txt", "UTF-8");
    writer.write(json);
    writer.close();

    NeptusLog.pub().info("uploading to convcao..." + json.toString());
    Upload("www.convcao.com", "NEPTUS", "", jTextField1.getText(), new String(jPasswordField1.getPassword()),
            SessionID + "_Data.txt");

    showText("Upload complete, downloading new AUV destinations");

    int receivedTimestep = 0;
    while (!cancel && receivedTimestep < timestep) {
        Thread.sleep(100);

        try {
            URL url = new URL(
                    "http://www.convcao.com/caoagile/FilesFromAgent/NEPTUS/" + SessionID + "_NewActions.txt");
            URLConnection conn = url.openConnection();
            conn.setUseCaches(false);
            conn.connect();
            BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
            String jsonClient = in.readLine();
            receive = new Gson().fromJson(jsonClient, TransferData.class);
            receivedTimestep = receive.timeStep;
        } catch (IOException ex) {
            NeptusLog.pub().error(ex);
        }
    }

    showText("Received updated positions from convcao");

    timestep++;

    for (int AUV = 0; AUV < receive.Location.length; AUV++) {
        String name = nameTable.get(AUV);
        LocationType loc = coords.convert(receive.Location[AUV][0], receive.Location[AUV][1]);
        loc.setDepth(1 + AUV * 1.5);//coords.convertNoptilusDepthToWgsDepth(receive.Location[AUV][2]));
        destinations.put(name, loc);
        showText(name + " is being sent to " + receive.Location[AUV][0] + ", " + receive.Location[AUV][1]);
    }

    myDeleteFile(SessionID + "_Data.txt");
}

---

From source file:es.upv.riromu.arbre.main.MainActivity.java

private Bitmap loadBitmap(String url) {
    Bitmap bm = null;/*from w  ww.j  a v  a2s.  c  o  m*/
    InputStream is = null;
    BufferedInputStream bis = null;
    try {
        URLConnection conn = new URL(url).openConnection();
        conn.connect();
        is = conn.getInputStream();
        bis = new BufferedInputStream(is, 8192);
        bm = BitmapFactory.decodeStream(bis);
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        if (bis != null) {
            try {
                bis.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        if (is != null) {
            try {
                is.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
    return bm;
}

---

From source file:convcao.com.agent.ConvcaoNeptusInteraction.java

/**
 * This method is called whenever the AUVs have reached their destinations and new data is to be sent to the server.<br/>
 * As a result, new destinations will be received and vehicles will travel to the new destinations.
 * @throws Exception If there is a problem communicating with the server.
 *//*from   ww  w .jav  a 2s .  co m*/
public void controlLoop() throws Exception {
    TransferData send = localState();
    if (send == null)
        throw new Exception("Unable to compute local state");

    TransferData receive = new TransferData();

    for (int AUV = 0; AUV < auvs; AUV++) {
        showText(nameTable.get(AUV) + " is at " + send.Location[AUV][0] + ", " + send.Location[AUV][1] + ", "
                + send.Location[AUV][2]);
    }

    Gson gson = new Gson();
    String json = gson.toJson(send);

    PrintWriter writer = null;
    writer = new PrintWriter(sessionID + "_Data.txt", "UTF-8");
    writer.write(json);
    writer.close();

    NeptusLog.pub().info("uploading to convcao..." + json.toString());
    upload("www.convcao.com", "NEPTUS", "", jTextField1.getText(), new String(jPasswordField1.getPassword()),
            sessionID + "_Data.txt");

    showText("Upload complete, downloading new AUV destinations");

    int receivedTimestep = 0;
    while (!cancel && receivedTimestep < timestep) {
        Thread.sleep(100);

        try {
            URL url = new URL(
                    "http://www.convcao.com/caoagile/FilesFromAgent/NEPTUS/" + sessionID + "_NewActions.txt");
            URLConnection conn = url.openConnection();
            conn.setUseCaches(false);
            conn.connect();
            BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
            String jsonClient = in.readLine();
            receive = new Gson().fromJson(jsonClient, TransferData.class);
            receivedTimestep = receive.timeStep;
        } catch (IOException ex) {
            NeptusLog.pub().error(ex);
        }
    }

    showText("Received updated positions from convcao");

    timestep++;

    for (int AUV = 0; AUV < receive.Location.length; AUV++) {
        String name = nameTable.get(AUV);
        LocationType loc = coords.convert(receive.Location[AUV][0], receive.Location[AUV][1]);
        loc.setDepth(firstVehicleDepth + AUV * depthIncrements);//coords.convertNoptilusDepthToWgsDepth(receive.Location[AUV][2]));
        destinations.put(name, loc);
        showText(name + " is being sent to " + receive.Location[AUV][0] + ", " + receive.Location[AUV][1]);
    }
    // reset arrived states
    for (String auvName : nameTable.values()) {
        arrived.put(auvName, false);
    }

    myDeleteFile(sessionID + "_Data.txt");
}

---

From source file:de.bps.course.nodes.vc.provider.adobe.AdobeConnectProvider.java

private String sendRequest(Map<String, String> parameters) {
    URL url = createRequestUrl(parameters);
    URLConnection urlConn;

    try {//from www  .  ja  v  a  2s  .co m
        urlConn = url.openConnection();
        // setup url connection
        urlConn.setDoOutput(true);
        urlConn.setUseCaches(false);
        // add content type
        urlConn.setRequestProperty("Content-Type", CONTENT_TYPE);
        // add cookie information
        if (cookie != null)
            urlConn.setRequestProperty("Cookie", COOKIE + cookie);

        // send request
        urlConn.connect();

        // read response
        BufferedReader input = new BufferedReader(new InputStreamReader(urlConn.getInputStream()));
        StringBuilder response = new StringBuilder();
        String line;
        while ((line = input.readLine()) != null)
            response.append(line);
        input.close();

        if (isLogDebugEnabled()) {
            logDebug("Requested URL: " + url);
            logDebug("Response: " + response);
        }

        return response.toString();
    } catch (IOException e) {
        logError("Sending request to Adobe Connect failed. Request: " + url.toString(), e);
        return "";
    }
}

---

From source file:org.nmdp.service.epitope.task.URLProcessor.java

private long refreshFromUrl(URL url, Consumer<InputStream> consumer, long lastModified)
        throws MalformedURLException, IOException {
    logger.debug("trying url: " + url);
    long sourceLastModified = 0;
    final URLConnection urlConnection = url.openConnection();
    if (url.getProtocol().equalsIgnoreCase("ftp")) {
        sourceLastModified = getFtpLastModifiedTime(url);
    } else {/*www .  ja va2s  . c om*/
        sourceLastModified = urlConnection.getLastModified();
    }
    String sourceLastModifiedStr = dateFormat.format(sourceLastModified);
    String lastModifiedStr = dateFormat.format(lastModified);
    if (sourceLastModified == 0) {
        logger.warn("resource has no modification date, forcing refresh...");
    } else if (sourceLastModified < lastModified) {
        logger.warn("resource is older than last modification date (source: " + sourceLastModifiedStr
                + ", last: " + lastModifiedStr + "), leaving it");
        return lastModified;
    } else if (sourceLastModified == lastModified) {
        logger.debug("resource is current (modified: " + lastModifiedStr + ")");
        return lastModified;
    } else {
        logger.info("resource is newer than last modification date, refreshing (source: "
                + sourceLastModifiedStr + ", cache: " + lastModifiedStr + ")");
    }
    urlConnection.connect();
    InputStream is = urlConnection.getInputStream();
    if (unzip) {
        ZipInputStream zis = new ZipInputStream(is);
        ZipEntry entry = zis.getNextEntry();
        logger.info("unzipping, got zip entry: {}", entry.getName());
        is = zis;
    }
    consumer.accept(is);
    is.close();
    return sourceLastModified;
}

---

From source file:org.apache.hadoop.mapreduce.task.reduce.Fetcher.java

/** 
 * The connection establishment is attempted multiple times and is given up 
 * only on the last failure. Instead of connecting with a timeout of 
 * X, we try connecting with a timeout of x < X but multiple times. 
 *//*ww w .j  a  v  a  2  s .  c o  m*/
private void connect(URLConnection connection, int connectionTimeout) throws IOException {
    int unit = 0;
    if (connectionTimeout < 0) {
        throw new IOException("Invalid timeout " + "[timeout = " + connectionTimeout + " ms]");
    } else if (connectionTimeout > 0) {
        unit = Math.min(UNIT_CONNECT_TIMEOUT, connectionTimeout);
    }
    long startTime = Time.monotonicNow();
    long lastTime = startTime;
    int attempts = 0;
    // set the connect timeout to the unit-connect-timeout
    connection.setConnectTimeout(unit);
    while (true) {
        try {
            attempts++;
            connection.connect();
            break;
        } catch (IOException ioe) {
            long currentTime = Time.monotonicNow();
            long retryTime = currentTime - startTime;
            long leftTime = connectionTimeout - retryTime;
            long timeSinceLastIteration = currentTime - lastTime;
            // throw an exception if we have waited for timeout amount of time
            // note that the updated value if timeout is used here
            if (leftTime <= 0) {
                int retryTimeInSeconds = (int) retryTime / 1000;
                LOG.error("Connection retry failed with " + attempts + " attempts in " + retryTimeInSeconds
                        + " seconds");
                throw ioe;
            }
            // reset the connect timeout for the last try
            if (leftTime < unit) {
                unit = (int) leftTime;
                // reset the connect time out for the final connect
                connection.setConnectTimeout(unit);
            }

            if (timeSinceLastIteration < unit) {
                try {
                    // sleep the left time of unit
                    sleep(unit - timeSinceLastIteration);
                } catch (InterruptedException e) {
                    LOG.warn("Sleep in connection retry get interrupted.");
                    if (stopped) {
                        return;
                    }
                }
            }
            // update the total remaining connect-timeout
            lastTime = Time.monotonicNow();
        }
    }
}

---

From source file:com.comcast.cdn.traffic_control.traffic_router.core.util.Fetcher.java

protected HttpURLConnection getConnection(final String url, final String data, final String requestMethod,
        final long lastFetchTime) throws IOException {
    String method = GET_STR;//  w ww. j  a  v a  2 s . com

    if (requestMethod != null) {
        method = requestMethod;
    }

    LOGGER.info(method + "ing: " + url + "; timeout is " + timeout);

    final URLConnection connection = new URL(url).openConnection();

    connection.setIfModifiedSince(lastFetchTime);

    if (timeout != 0) {
        connection.setConnectTimeout(timeout);
        connection.setReadTimeout(timeout);
    }

    final HttpURLConnection http = (HttpURLConnection) connection;

    if (connection instanceof HttpsURLConnection) {
        final HttpsURLConnection https = (HttpsURLConnection) connection;
        https.setHostnameVerifier(new HostnameVerifier() {
            @Override
            public boolean verify(final String arg0, final SSLSession arg1) {
                return true;
            }
        });
    }

    http.setInstanceFollowRedirects(false);
    http.setRequestMethod(method);
    http.setAllowUserInteraction(true);

    for (final String key : requestProps.keySet()) {
        http.addRequestProperty(key, requestProps.get(key));
    }

    if (method.equals(POST_STR) && data != null) {
        http.setDoOutput(true); // Triggers POST.

        try (final OutputStream output = http.getOutputStream()) {
            output.write(data.getBytes(UTF8_STR));
        }
    }

    connection.connect();

    return http;
}

---

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