Example usage for java.net URLConnection setUseCaches

Introduction

In this page you can find the example usage for java.net URLConnection setUseCaches.

Prototype

public void setUseCaches(boolean usecaches) 

Source Link

Document

Sets the value of the useCaches field of this URLConnection to the specified value.

Usage

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

/**
 * Retourn l'url a partie d'un site distant
 * //from  w w  w  .  ja va  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;
}

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From source file:dk.netarkivet.common.distribute.HTTPRemoteFile.java

/**
 * Invalidate all file handles, by asking the remote registry to remove the
 * url for this remote file from the list of shared files.
 * Invalidating a file handle may delete the original files, if deletable.
 * This method does not throw exceptions, but will warn on errors.
 *///from   w  w  w  . j av  a2 s.c  o m
public void cleanup() {
    if (filesize == 0) {
        return;
    }
    try {
        URLConnection urlConnection = getRegistry().openConnection(getRegistry().getCleanupUrl(url));
        urlConnection.setUseCaches(false);
        urlConnection.connect();
        urlConnection.getInputStream();
    } catch (IOException e) {
        log.warn("Unable to cleanup file '" + file.getAbsolutePath() + "' with URL'" + url + "'", e);
    }
}

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From source file:com.gmail.tracebachi.DeltaSkins.Shared.MojangApi.java

private HttpURLConnection openSkinConnection(String uuid) throws IOException {
    URL url = new URL(SKIN_ADDR + uuid + "?unsigned=false");
    URLConnection connection = url.openConnection();
    connection.setConnectTimeout(CONNECT_TIMEOUT);
    connection.setReadTimeout(READ_TIMEOUT);
    connection.setDoInput(true);/* ww  w .  j a va 2  s.com*/
    connection.setUseCaches(false);
    return (HttpURLConnection) connection;
}

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From source file:ca.simplegames.micro.utils.UrlResource.java

/**
 * This implementation opens an InputStream for the given URL.
 * It sets the "UseCaches" flag to <code>false</code>,
 * mainly to avoid jar file locking on Windows.
 *
 * @see java.net.URL#openConnection()/*w w  w  . j  a  va 2s  . c o  m*/
 * @see java.net.URLConnection#setUseCaches(boolean)
 * @see java.net.URLConnection#getInputStream()
 */
public InputStream getInputStream() throws IOException {
    URLConnection con = this.url.openConnection();
    con.setUseCaches(false);
    return con.getInputStream();
}

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From source file:net.sourceforge.atunes.kernel.modules.network.NetworkHandler.java

/**
 * Sends a POST request with given parameters and receives response with
 * given charset/*from w w w  .jav  a 2 s .co  m*/
 * 
 * @param requestURL
 * @param params
 * @param charset
 * @return
 * @throws IOException
 */
@Override
public String readURL(final String requestURL, final Map<String, String> params, final String charset)
        throws IOException {
    URLConnection connection = getConnection(requestURL);
    connection.setUseCaches(false);
    connection.setDoInput(true);

    if (params != null && params.size() > 0) {
        connection.setDoOutput(true);
        OutputStreamWriter writer = new OutputStreamWriter(connection.getOutputStream());
        writer.write(formatPOSTParameters(params));
        writer.flush();
    }

    InputStream input = null;
    try {
        input = connection.getInputStream();
        return IOUtils.toString(input, charset);
    } finally {
        ClosingUtils.close(input);
    }
}

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From source file:com.qiqi8226.http.MainActivity.java

private void onBtnPost() {
    new AsyncTask<String, String, Void>() {

        @Override//  w  ww.j a  v  a2  s.  c o  m
        protected Void doInBackground(String... params) {
            URL url;
            try {
                url = new URL(params[0]);
                URLConnection conn = url.openConnection();

                conn.setDoInput(true);
                conn.setDoOutput(true);
                conn.setUseCaches(false);

                BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(conn.getOutputStream()));
                bw.write("");
                bw.flush();

                BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
                String line;
                while ((line = br.readLine()) != null) {
                    publishProgress(line);
                }
                br.close();
            } catch (MalformedURLException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return null;
        }

        @Override
        protected void onProgressUpdate(String... values) {
            tv.append(values[0] + "\n");
        }
    }.execute("http://www.baidu.com/");
}

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From source file:be.apsu.extremon.probes.tsp.TSPProbe.java

private TimeStampResponse probe(TimeStampRequest request) throws IOException, TSPException {
    URLConnection connection = this.url.openConnection();
    connection.setDoInput(true);/*w  w  w .j  a  v a2  s .c  o  m*/
    connection.setDoOutput(true);
    connection.setUseCaches(false);
    connection.setRequestProperty("Content-Type", "application/timestamp-query");
    OutputStream outputStream = (connection.getOutputStream());
    outputStream.write(request.getEncoded());
    outputStream.flush();
    outputStream.close();
    InputStream inputStream = connection.getInputStream();
    TimeStampResponse response = new TimeStampResponse(inputStream);
    inputStream.close();
    return response;
}

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From source file:com.example.chengcheng.network.httpstacks.HttpUrlConnStack.java

private HttpURLConnection createUrlConnection(String url) throws IOException {
    URL newURL = new URL(url);
    URLConnection urlConnection = newURL.openConnection();
    urlConnection.setConnectTimeout(mConfig.connTimeOut);
    urlConnection.setReadTimeout(mConfig.soTimeOut);
    urlConnection.setDoInput(true);/*from www .ja  va2 s .  c  o m*/
    urlConnection.setUseCaches(false);
    return (HttpURLConnection) urlConnection;
}

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From source file:com.chiorichan.plugin.loader.Plugin.java

public InputStream getResource(String filename) {
    if (filename == null) {
        throw new IllegalArgumentException("Filename cannot be null");
    }/*from w w  w . j  a  v  a2 s .  c om*/

    try {
        URL url = getClassLoader().getResource(filename);

        if (url == null) {
            return null;
        }

        URLConnection connection = url.openConnection();
        connection.setUseCaches(false);
        return connection.getInputStream();
    } catch (IOException ex) {
        return null;
    }
}

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From source file:org.jlibrary.core.http.client.HTTPDelegate.java

/**
 * Excecutes a void request//from www  .ja  v a2  s. co  m
 * 
 * @param methodName Name of the method to execute
 * @param params Method params
 * @param returnClass Class for the return object. If the class is InputStream this method will return 
 * the HTTP request input stream
 * @param inputStream Stream for reading contents that will be sent
 * 
 * @throws Exception If there is any problem running the request
 */
public Object doRequest(String methodName, Object[] params, Class returnClass, InputStream inputStream)
        throws Exception {

    try {
        logger.debug(servletURL.toString());
        logger.debug("opening connection");
        URLConnection conn = servletURL.openConnection();
        conn.setDoInput(true);
        conn.setDoOutput(true);
        conn.setUseCaches(false);
        conn.setAllowUserInteraction(false);
        conn.setRequestProperty("Content-type", "text/plain");

        //write request and params:
        OutputStream stream = conn.getOutputStream();
        // write streaming header if necessary
        if (inputStream != null) {
            stream.write(ByteUtils.intToByteArray("stream-input".getBytes().length));
            stream.write("stream-input".getBytes());
            stream.flush();
        }
        if (returnClass == InputStream.class) {
            stream.write(ByteUtils.intToByteArray("stream-output".getBytes().length));
            stream.write("stream-output".getBytes());
            stream.flush();
        }

        // Write method
        stream.write(ByteUtils.intToByteArray(methodName.getBytes().length));
        stream.write(methodName.getBytes());
        //stream.flush();
        // Write parameters
        stream.write(ByteUtils.intToByteArray(params.length));
        for (int i = 0; i < params.length; i++) {
            byte[] content = SerializationUtils.serialize((Serializable) params[i]);
            stream.write(ByteUtils.intToByteArray(content.length));
            stream.write(content);
            stream.flush();
        }

        if (inputStream != null) {
            IOUtils.copy(inputStream, stream);
        }

        //stream.flush();
        //stream.close();

        //read response:
        InputStream input = conn.getInputStream();
        if (returnClass == InputStream.class) {
            // Contents will be read from outside
            return input;
        }
        ObjectInputStream objInput = new ObjectInputStream(input);
        Object o = objInput.readObject();
        if (o == null) {
            return null;
        }
        stream.close();
        if (o instanceof Exception) {
            throw (Exception) o;
        } else {
            if (returnClass == null) {
                return null;
            }
            // try to cast
            try {
                returnClass.cast(o);
            } catch (ClassCastException cce) {
                String msg = "Unexpected response from execution servlet: " + o;
                logger.error(msg);
                throw new Exception(msg);
            }
        }
        return o;
    } catch (ClassNotFoundException e) {
        throw new Exception(e);
    } catch (ClassCastException e) {
        throw new Exception(e);
    } catch (IOException e) {
        throw new Exception(e);
    }
}

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