Example usage for java.net HttpURLConnection connect

Introduction

In this page you can find the example usage for java.net HttpURLConnection 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.google.code.facebook.graph.sna.applet.FacebookGraphApplet.java

/**
 * //from  w w  w .  j a v  a 2 s. c o  m
 */
@SuppressWarnings("unchecked")
private void fetchUserGraph() {
    try {
        String accessToken = getParameter("accessToken");
        URL url = new URL("http://facebookgraph.appspot.com/fetchGraph?accessToken=" + encodeUrl(accessToken));
        HttpURLConnection request = (HttpURLConnection) url.openConnection();

        request.connect();

        if (request.getResponseCode() == HttpURLConnection.HTTP_OK) {
            GraphAdapter<Graph<Entity<FieldEnum, ConnectionEnum>, EdgeAdapter<ConnectionEnum>>, Entity<FieldEnum, ConnectionEnum>, ConnectionEnum> adapter = new JungGraphAdapter<Entity<FieldEnum, ConnectionEnum>, ConnectionEnum>();
            ObjectInputStream is = new ObjectInputStream(new GZIPInputStream(request.getInputStream()));
            graph = adapter.adaptFrom((GraphNode<? extends FieldEnum, ConnectionEnum>) is.readObject());
            is.close();
        }
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

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From source file:org.hawkular.metrics.clients.ptrans.fullstack.CollectdITest.java

private List<Point> getServerData() throws Exception {
    ObjectMapper objectMapper = new ObjectMapper();

    HttpURLConnection urlConnection = (HttpURLConnection) new URL(findNumericMetricsUrl).openConnection();
    urlConnection.connect();
    int responseCode = urlConnection.getResponseCode();
    if (responseCode != HttpURLConnection.HTTP_OK) {
        String msg = "Could not get metrics list from server: %s, %d";
        fail(String.format(Locale.ROOT, msg, findNumericMetricsUrl, responseCode));
    }//from   w  ww.j a  v a 2s . c  om
    List<String> metricNames;
    try (InputStream inputStream = urlConnection.getInputStream()) {
        TypeFactory typeFactory = objectMapper.getTypeFactory();
        CollectionType valueType = typeFactory.constructCollectionType(List.class, MetricName.class);
        List<MetricName> value = objectMapper.readValue(inputStream, valueType);
        metricNames = value.stream().map(MetricName::getId).collect(toList());
    }

    Stream<Point> points = Stream.empty();

    for (String metricName : metricNames) {
        String[] split = metricName.split("\\.");
        String type = split[split.length - 1];

        urlConnection = (HttpURLConnection) new URL(findNumericDataUrl(metricName)).openConnection();
        urlConnection.connect();
        responseCode = urlConnection.getResponseCode();
        if (responseCode != HttpURLConnection.HTTP_OK) {
            fail("Could not load metric data from server: " + responseCode);
        }

        try (InputStream inputStream = urlConnection.getInputStream()) {
            TypeFactory typeFactory = objectMapper.getTypeFactory();
            CollectionType valueType = typeFactory.constructCollectionType(List.class, MetricData.class);
            List<MetricData> data = objectMapper.readValue(inputStream, valueType);
            Stream<Point> metricPoints = data.stream()
                    .map(metricData -> new Point(type, metricData.timestamp, metricData.value));
            points = Stream.concat(points, metricPoints);
        }
    }

    return points.sorted(Comparator.comparing(Point::getType).thenComparing(Point::getTimestamp))
            .collect(toList());
}

---

From source file:com.google.code.facebook.graph.sna.applet.FacebookGraphApplet.java

private Image getImageFromEntity(Entity<FieldEnum, ConnectionEnum> entity) {
    if (DISPLAYABLE_ENTITIES.contains(entity.getType())) {
        try {/*w w  w  .jav a 2s  .  com*/
            URL url = new URL("http://facebookgraph.appspot.com/proxy?url=" + encodeUrl(entity.getPicture()));
            HttpURLConnection request = (HttpURLConnection) url.openConnection();

            request.connect();

            if (request.getResponseCode() == HttpURLConnection.HTTP_OK) {
                BufferedImage image = ImageIO.read(request.getInputStream());
                return Toolkit.getDefaultToolkit().createImage(image.getSource());
            }

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

---

From source file:dk.cafeanalog.AnalogDownloader.java

public AnalogStatus isOpen() {
    HttpURLConnection connection = null;
    JsonReader reader = null;//from   w ww  . ja v  a 2  s  .  c om

    try {
        URL url = new URL("http", "cafeanalog.dk", "api/open");
        connection = (HttpURLConnection) url.openConnection();
        connection.setRequestMethod("GET");
        connection.connect();
        reader = new JsonReader(new InputStreamReader(connection.getInputStream()));
        reader.beginObject();
        while (!reader.nextName().equals("open")) {
            reader.skipValue();
        }
        return reader.nextBoolean() ? AnalogStatus.OPEN : AnalogStatus.CLOSED;
    } catch (IOException e) {
        return AnalogStatus.UNKNOWN;
    } finally {
        if (connection != null)
            connection.disconnect();
        if (reader != null) {
            try {
                reader.close();
            } catch (IOException ignored) {
            }
        }
    }
}

---

From source file:eu.vranckaert.worktime.web.json.JsonWebServiceImpl.java

@Override
public boolean isEndpointAvailable(String endpoint) {
    try {//from ww w .  ja v  a2s  .  c  o m
        URL url = new URL(endpoint);
        HttpURLConnection urlc = (HttpURLConnection) url.openConnection();
        urlc.setConnectTimeout(3000);
        urlc.connect();
        if (urlc.getResponseCode() == HttpStatusCode.OK) {
            return true;
        }
    } catch (MalformedURLException e1) {
    } catch (IOException e) {
    }
    return false;
}

---

From source file:com.longwei.project.sso.client.util.HttpClient.java

public boolean isValidEndPoint(final URL url) {
    HttpURLConnection connection = null;
    try {/* www.j a v a2  s .c o m*/
        connection = (HttpURLConnection) url.openConnection();
        connection.setConnectTimeout(this.connectionTimeout);
        connection.setReadTimeout(this.readTimeout);

        connection.connect();

        final int responseCode = connection.getResponseCode();

        for (final int acceptableCode : this.acceptableCodes) {
            if (responseCode == acceptableCode) {
                if (log.isDebugEnabled()) {
                    log.debug("Response code from server matched " + responseCode + ".");
                }
                return true;
            }
        }

        if (log.isDebugEnabled()) {
            log.debug("Response Code did not match any of the acceptable response codes.  Code returned was "
                    + responseCode);
        }
    } catch (final IOException e) {
        log.error(e.getMessage(), e);
    } finally {
        if (connection != null) {
            connection.disconnect();
        }
    }
    return false;
}

---

From source file:com.geozen.demo.foursquare.jiramot.Util.java

/**
 * Connect to an HTTP URL and return the response as a string.
 * /*  w w  w  . j a v  a  2  s  .  c om*/
 * Note that the HTTP method override is used on non-GET requests. (i.e.
 * requests are made as "POST" with method specified in the body).
 * 
 * @param url
 *            - the resource to open: must be a welformed URL
 * @param method
 *            - the HTTP method to use ("GET", "POST", etc.)
 * @param params
 *            - the query parameter for the URL (e.g. access_token=foo)
 * @return the URL contents as a String
 * @throws MalformedURLException
 *             - if the URL format is invalid
 * @throws IOException
 *             - if a network problem occurs
 */
public static String openUrl(String url, String method, Bundle params)
        throws MalformedURLException, IOException {
    // random string as boundary for multi-part http post
    String strBoundary = "3i2ndDfv2rTHiSisAbouNdArYfORhtTPEefj3q2f";
    String endLine = "\r\n";

    OutputStream os;

    if (method.equals("GET")) {
        url = url + "?" + encodeUrl(params);
    }
    Log.d("Foursquare-Util", method + " URL: " + url);
    HttpURLConnection conn = (HttpURLConnection) new URL(url).openConnection();
    conn.setRequestProperty("User-Agent", System.getProperties().getProperty("http.agent") + " GeoZen");

    if (!method.equals("GET")) {
        Bundle dataparams = new Bundle();
        for (String key : params.keySet()) {
            if (params.getByteArray(key) != null) {
                dataparams.putByteArray(key, params.getByteArray(key));
            }
        }

        // use method override
        if (!params.containsKey("method")) {
            params.putString("method", method);
        }

        if (params.containsKey("access_token")) {
            String decoded_token = URLDecoder.decode(params.getString("access_token"));
            params.putString("access_token", decoded_token);
        }

        conn.setRequestMethod("POST");
        conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + strBoundary);
        conn.setDoOutput(true);
        conn.setDoInput(true);
        conn.setRequestProperty("Connection", "Keep-Alive");
        conn.connect();
        os = new BufferedOutputStream(conn.getOutputStream());

        os.write(("--" + strBoundary + endLine).getBytes());
        os.write((encodePostBody(params, strBoundary)).getBytes());
        os.write((endLine + "--" + strBoundary + endLine).getBytes());

        if (!dataparams.isEmpty()) {

            for (String key : dataparams.keySet()) {
                os.write(("Content-Disposition: form-data; filename=\"" + key + "\"" + endLine).getBytes());
                os.write(("Content-Type: content/unknown" + endLine + endLine).getBytes());
                os.write(dataparams.getByteArray(key));
                os.write((endLine + "--" + strBoundary + endLine).getBytes());

            }
        }
        os.flush();
    }

    String response = "";
    try {
        response = read(conn.getInputStream());
    } catch (FileNotFoundException e) {
        // Error Stream contains JSON that we can parse to a FB error
        response = read(conn.getErrorStream());
    }
    return response;
}

---

From source file:com.google.wave.api.oauth.impl.OpenSocialHttpClient.java

/**
 * Opens a new HTTP connection for the URL associated with this object.
 *
 * @param method/*from   w  w w  . jav  a  2  s  .  c o  m*/
 * @param url
 * @return Opened connection
 * @throws IOException if URL is invalid, or unsupported
 */
private HttpURLConnection getConnection(String method, OpenSocialUrl url, String contentType)
        throws IOException {
    HttpURLConnection connection = (HttpURLConnection) new URL(url.toString()).openConnection();
    if (contentType != null && !contentType.equals("")) {
        connection.setRequestProperty(HttpMessage.CONTENT_TYPE, contentType);
    }
    connection.setRequestMethod(method);
    connection.setDoOutput(true);
    connection.connect();

    return connection;
}

---

From source file:com.jeffrodriguez.webtools.client.URLConnectionWebClientImpl.java

@Override
public void get(String url, OutputStream out) throws IOException {
    logger.log(Level.INFO, "Getting from {0}", url);

    // Build and connect
    HttpURLConnection connection = buildConnection(url);
    connection.connect();

    // Check for errors
    checkForErrors(connection);/*from   ww  w .  j  av a 2 s.  co  m*/

    // Get the result
    disconnectAndReturn(connection, IOUtils.copy(connection.getInputStream(), out));
}

---

From source file:com.jeffrodriguez.webtools.client.URLConnectionWebClientImpl.java

@Override
public byte[] get(String url) throws IOException {
    logger.log(Level.INFO, "Getting byte[] from {0}", url);

    // Build and connect
    HttpURLConnection connection = buildConnection(url);
    connection.connect();

    // Check for errors
    checkForErrors(connection);/*from w ww  . j  a  v a2  s  . com*/

    // Get the result
    return disconnectAndReturn(connection, IOUtils.toByteArray(connection.getInputStream()));
}

---

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