Example usage for java.net URLConnection connect

List of usage examples for java.net URLConnection connect

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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:util.connection.AnonymousClient.java

public String download(URL source) throws IOException {
    // set the request URL
    URL request = new URL(source, source.getFile(), handler);
    // send request and receive response
    log.info("download (start) from source=" + source);
    URLConnection connection = request.openConnection();
    connection.setDoOutput(true);/*from w  w w .j  a v a2 s. co  m*/
    connection.setDoInput(true);
    connection.setUseCaches(false);
    connection.setAllowUserInteraction(false);

    connection.connect();

    String responsebody = IOUtils.toString(connection.getInputStream(), "UTF-8");
    // read the response
    netLayer.clear();
    netLayer.waitUntilReady();
    return responsebody;
}

From source file:org.apache.tiles.definition.dao.BaseLocaleUrlDefinitionDAO.java

/**
 * Loads definitions from an URL without loading from "parent" URLs.
 *
 * @param url The URL to read./*from w ww .java2s .  c om*/
 * @return The definition map that has been read.
 */
protected Map<String, Definition> loadDefinitionsFromURL(URL url) {
    Map<String, Definition> defsMap = null;
    try {
        URLConnection connection = url.openConnection();
        connection.connect();
        lastModifiedDates.put(url.toExternalForm(), connection.getLastModified());

        // Definition must be collected, starting from the base
        // source up to the last localized file.
        defsMap = reader.read(connection.getInputStream());
    } catch (FileNotFoundException e) {
        // File not found. continue.
        if (log.isDebugEnabled()) {
            log.debug("File " + null + " not found, continue");
        }
    } catch (IOException e) {
        throw new DefinitionsFactoryException("I/O error processing configuration.", e);
    }

    return defsMap;
}

From source file:org.gradle.internal.resource.UriResource.java

private Reader getInputStream(URI url) throws IOException {
    final URLConnection urlConnection = url.toURL().openConnection();
    urlConnection.setRequestProperty("User-Agent", getUserAgentString());
    urlConnection.connect();
    String charset = extractCharacterEncoding(urlConnection.getContentType(), "utf-8");
    return new InputStreamReader(urlConnection.getInputStream(), charset);
}

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

public InputStream getResourceAsStream(final ResourceManager caller) throws ResourceLoadingException {
    try {//from w w w . j a va  2s  .  c om
        final URLConnection c = url.openConnection();
        c.setDoOutput(false);
        c.setAllowUserInteraction(false);
        c.connect();
        if (isFixBrokenWebServiceDateHeader() == false) {
            readMetaData(c);
        }
        return c.getInputStream();
    } catch (IOException e) {
        throw new ResourceLoadingException("Failed to open URL connection", e);
    }
}

From source file:org.jesterj.ingest.processors.FetchUrl.java

@Override
public Document[] processDocument(Document document) {
    URL url = null;/*  w w w  . j  a va2  s.com*/
    try {
        url = new URL(document.getFirstValue(linkField));
        String protocol = url.getProtocol();
        String server = url.getHost();
        Long lastAccess = visitedSiteCache.getIfPresent(server);
        long now = System.currentTimeMillis();
        if (lastAccess == null) {
            visitedSiteCache.put(server, now);
        } else {
            long elapsed = now - lastAccess;
            if (elapsed < throttleMs) {
                try {
                    Thread.sleep(throttleMs - elapsed);
                } catch (InterruptedException e) {
                    // ignore, not really important.
                }
            }
        }
        URLConnection conn = url.openConnection();
        conn.setConnectTimeout(5000);
        conn.setReadTimeout(5000);
        conn.connect();

        ByteArrayOutputStream baos = new ByteArrayOutputStream();

        if (protocol != null && ("http".equals(protocol) || "https".equals(protocol))) {
            HttpURLConnection httpConnection = (HttpURLConnection) conn;
            int responseCode = httpConnection.getResponseCode();
            if (httpStatusField != null) {
                document.put(httpStatusField, String.valueOf(responseCode));
            }
            if (responseCode >= 400) {
                String message = "HTTP server responded " + responseCode + " "
                        + httpConnection.getResponseMessage();
                if (errorField != null) {
                    document.put(errorField, message);
                }
                throw new IOException(message);
            }
        }
        IOUtils.copy(conn.getInputStream(), baos);
        document.setRawData(baos.toByteArray());
    } catch (IOException e) {
        if (failOnIOError) {
            if (errorField != null) {
                document.put(errorField, e.getMessage());
            }
            document.setStatus(Status.ERROR);
        } else {
            log.warn("Could not fetch " + url + " for " + document.getId(), e);
        }
    }
    return new Document[] { document };
}

From source file:io.v.positioning.gae.ServletPostAsyncTask.java

@Override
protected String doInBackground(Context... params) {
    mContext = params[0];/*from  w w  w  .ja  va2 s  . co m*/
    DataOutputStream os = null;
    InputStream is = null;
    try {
        URLConnection conn = mUrl.openConnection();
        conn.setDoOutput(true);
        conn.setDoInput(true);
        conn.setUseCaches(false);
        conn.setRequestProperty("Content-Type", "application/json; charset=UTF-8");
        conn.connect();
        os = new DataOutputStream(conn.getOutputStream());
        os.write(mData.toString().getBytes("UTF-8"));
        is = conn.getInputStream();
        BufferedReader br = new BufferedReader(new InputStreamReader(is));
        return br.readLine();
    } catch (IOException e) {
        return "IOException while contacting GEA: " + e.getMessage();
    } catch (Exception e) {
        return "Exception while contacting GEA: " + e.getLocalizedMessage();
    } finally {
        if (os != null)
            try {
                os.close();
            } catch (IOException e) {
                return "IOException closing os: " + e.getMessage();
            }
        if (is != null)
            try {
                is.close();
            } catch (IOException e) {
                return "IOException closing is: " + e.getMessage();
            }
    }
}

From source file:org.apache.tiles.definition.dao.BaseLocaleUrlDefinitionDAO.java

/** {@inheritDoc} */
public boolean refreshRequired() {
    boolean status = false;

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

    try {//from  ww w .j a v a  2 s . c  o m
        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) {
        log.warn("Exception while monitoring update times.", e);
        return true;
    }
    return status;
}

From source file:at.alladin.rmbt.android.util.AsyncHtmlContentRetriever.java

@Override
protected List<Object> doInBackground(String... params) {
    List<Object> result = new ArrayList<Object>();
    URL url;/*from   w w  w. j  ava2  s.com*/
    URLConnection connection;
    try {
        url = new URL(params[0]);
        connection = url.openConnection();
        connection.setConnectTimeout(3000);
        connection.connect();
    } catch (Exception e) {
        result.add(-1);
        result.add(null);
        return result;
    }

    String htmlContent = "";
    HttpGet httpGet = new HttpGet(params[0]);
    HttpClient httpClient = new DefaultHttpClient();
    HttpResponse response;
    int statusCode = -1;

    try {
        response = httpClient.execute(httpGet);
        statusCode = response.getStatusLine().getStatusCode();
        System.out.println("response code: " + statusCode);
        /*
         * load HTML:
         */
        /*
        HttpEntity entity = response.getEntity();
        if (entity != null) {
           InputStream inputStream = entity.getContent();
           htmlContent = convertToString(inputStream);
        }
        */
    } catch (Exception e) {
        result.add(-1);
        result.add(null);
        return result;
    }

    result.add(statusCode);
    result.add(htmlContent);

    return result;
}

From source file:io.trivium.Registry.java

public void reload() {
    final String PREFIX = "META-INF/services/";
    ClassLoader tvmLoader = ClassLoader.getSystemClassLoader();
    //types// w w w.j a va 2 s . c om
    try {
        Enumeration<URL> resUrl = tvmLoader.getResources(PREFIX + "io.trivium.extension.Fact");
        while (resUrl.hasMoreElements()) {
            URL url = resUrl.nextElement();
            URLConnection connection = url.openConnection();
            connection.connect();
            InputStream is = connection.getInputStream();
            List<String> lines = IOUtils.readLines(is, "UTF-8");
            is.close();
            for (String line : lines) {
                Class<? extends Fact> clazz = (Class<? extends Fact>) Class.forName(line);
                Fact prototype = clazz.newInstance();
                if (!types.containsKey(prototype.getTypeRef())) {
                    types.put(prototype.getTypeRef(), clazz);
                }
                logger.log(Level.FINE, "registered type {0}", prototype.getFactName());
            }
        }
    } catch (Exception ex) {
        logger.log(Level.SEVERE, "dynamically loading types failed", ex);
    }

    //bindings
    try {
        Enumeration<URL> resUrl = tvmLoader.getResources(PREFIX + "io.trivium.extension.Binding");
        while (resUrl.hasMoreElements()) {
            URL url = resUrl.nextElement();
            URLConnection connection = url.openConnection();
            connection.connect();
            InputStream is = connection.getInputStream();
            List<String> lines = IOUtils.readLines(is, "UTF-8");
            is.close();
            for (String line : lines) {
                Class<? extends Binding> clazz = (Class<? extends Binding>) Class.forName(line);
                Binding prototype = clazz.newInstance();
                if (!bindings.containsKey(prototype.getTypeRef())) {
                    bindings.put(prototype.getTypeRef(), clazz);
                    //register prototype
                    bindingInstances.put(prototype.getTypeRef(), prototype);
                }
                logger.log(Level.FINE, "registered binding {0}", prototype.getName());
            }
        }
    } catch (Exception ex) {
        logger.log(Level.SEVERE, "dynamically loading bindings failed", ex);
    }

    //tasks
    try {
        Enumeration<URL> resUrl = tvmLoader.getResources(PREFIX + "io.trivium.extension.Task");
        while (resUrl.hasMoreElements()) {
            URL url = resUrl.nextElement();
            URLConnection connection = url.openConnection();
            connection.connect();
            InputStream is = connection.getInputStream();
            List<String> lines = IOUtils.readLines(is, "UTF-8");
            is.close();
            for (String line : lines) {
                Class<? extends Task> clazz = (Class<? extends Task>) Class.forName(line);
                Task prototype = clazz.newInstance();
                if (!tasks.containsKey(prototype.getTypeRef())) {
                    tasks.put(prototype.getTypeRef(), clazz);
                }
                logger.log(Level.FINE, "registered binding {0}", prototype.getName());
            }
        }
    } catch (Exception ex) {
        logger.log(Level.SEVERE, "dynamically loading bindings failed", ex);
    }

    //testcases
    try {
        Enumeration<URL> resUrl = tvmLoader.getResources(PREFIX + "io.trivium.test.TestCase");
        while (resUrl.hasMoreElements()) {
            URL url = resUrl.nextElement();
            URLConnection connection = url.openConnection();
            connection.connect();
            InputStream is = connection.getInputStream();
            List<String> lines = IOUtils.readLines(is, "UTF-8");
            is.close();
            for (String line : lines) {
                Class<? extends TestCase> clazz = (Class<? extends TestCase>) Class.forName(line);
                TestCase prototype = clazz.newInstance();
                if (!testcases.containsKey(prototype.getTypeRef())) {
                    testcases.put(prototype.getTypeRef(), prototype);
                }
                logger.log(Level.FINE, "registered testcase {0}", prototype.getTypeRef());
            }
        }
    } catch (Exception ex) {
        logger.log(Level.SEVERE, "dynamically loading test cases failed", ex);
    }
}

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

/**
 * Recupere la date du fichier dont le chemin est l'url
 * /*from w  w w. j  a  v a 2  s.c om*/
 * @param pUrl : L'url
 * @return : Date dir URL OK
 * @throws IOException Probleme sur l'ouverture de la connection
 */
public Date getURLDate(final URL pUrl) throws IOException {

    final URLConnection urlcon = pUrl.openConnection();
    urlcon.setUseCaches(true);
    urlcon.connect();
    return new Date(urlcon.getLastModified());

}