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:io.bitsquare.common.util.Utilities.java

public static String readTextFileFromServer(String url, String userAgent) throws IOException {
    URLConnection connection = URI.create(url).toURL().openConnection();
    connection.setDoOutput(true);//w  w w.j  av a 2 s .  c om
    connection.setUseCaches(false);
    connection.setConnectTimeout((int) TimeUnit.SECONDS.toMillis(10));
    connection.addRequestProperty("User-Agent", userAgent);
    connection.connect();
    try (InputStream inputStream = connection.getInputStream()) {
        return CharStreams.toString(new InputStreamReader(inputStream, Charsets.UTF_8));
    } catch (IOException e) {
        e.printStackTrace();
        throw e;
    }
}

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From source file:ru.codeinside.gses.webui.form.JsonForm.java

static String loadTemplate(ActivitiApp app, String ref) {
    try {//from  w  w w . j a v a2  s .c  om
        URL serverUrl = app.getServerUrl();
        URL url = new URL(serverUrl, ref);
        logger().info("fetch template " + url);
        URLConnection connection = url.openConnection();
        connection.setDoOutput(false);
        connection.setDoInput(true);
        connection.setConnectTimeout(5000);
        connection.setReadTimeout(5000);
        connection.setUseCaches(false);
        connection.connect();
        return Streams.toString(connection.getInputStream());
    } catch (MalformedURLException e) {
        throw new RuntimeException(e);
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
}

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From source file:BihuHttpUtil.java

public static String doHttpPost(String xmlInfo, String URL) {
    System.out.println("??:" + xmlInfo);
    byte[] xmlData = xmlInfo.getBytes();
    InputStream instr = null;//from   w  ww. j  a  va  2s  .co  m
    java.io.ByteArrayOutputStream out = null;
    try {
        URL url = new URL(URL);
        URLConnection urlCon = url.openConnection();
        urlCon.setDoOutput(true);
        urlCon.setDoInput(true);
        urlCon.setUseCaches(false);
        urlCon.setRequestProperty("Content-Type", "text/xml");
        urlCon.setRequestProperty("Content-length", String.valueOf(xmlData.length));
        System.out.println(String.valueOf(xmlData.length));
        DataOutputStream printout = new DataOutputStream(urlCon.getOutputStream());
        printout.write(xmlData);
        printout.flush();
        printout.close();
        instr = urlCon.getInputStream();
        byte[] bis = IOUtils.toByteArray(instr);
        String ResponseString = new String(bis, "UTF-8");
        if ((ResponseString == null) || ("".equals(ResponseString.trim()))) {
            System.out.println("");
        }
        System.out.println("?:" + ResponseString);
        return ResponseString;

    } catch (Exception e) {
        e.printStackTrace();
        return "0";
    } finally {
        try {
            out.close();
            instr.close();
        } catch (Exception ex) {
            return "0";
        }
    }
}

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From source file:org.motechproject.mmnaija.web.util.HTTPCommunicator.java

public static String doPost(String serviceUrl, String queryString) {
    URLConnection connection = null;
    try {/*from w  w  w  .j av a 2 s.  c om*/

        URL url = new URL(serviceUrl);
        URI uri = new URI(url.getProtocol(), url.getUserInfo(), url.getHost(), url.getPort(), url.getPath(),
                url.getQuery(), url.getRef());
        url = uri.toURL();
        // Open the connection
        connection = url.openConnection();
        connection.setDoInput(true);
        connection.setUseCaches(false); // Disable caching the document
        connection.setDoOutput(true); // Triggers POST.
        connection.setRequestProperty("Content-Type", "text/html");

        OutputStreamWriter writer = null;

        log.info("About to write");
        try {
            if (null != connection.getOutputStream()) {
                writer = new OutputStreamWriter(connection.getOutputStream());
                writer.write(queryString); // Write POST query

            } else {
                log.warn("connection Null");
            }
            // string.
        } catch (ConnectException ex) {
            log.warn("Exception : " + ex);
            // ex.printStackTrace();
        } finally {
            if (writer != null) {
                try {
                    writer.close();
                } catch (Exception lg) {
                    log.warn("Exception lg: " + lg.toString());
                    //lg.printStackTrace();
                }
            }
        }

        InputStream in = connection.getInputStream();

        //            StringWriter writer = new StringWriter();
        IOUtils.copy(in, writer, "utf-8");
        String theString = writer.toString();
        return theString;
    } catch (Exception e) {
        //e.printStackTrace();
        log.warn("Error URL " + e.toString());
        return "";
    }
}

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From source file:org.dhatim.util.ClassUtil.java

private static <T> void addClasses(URL url, Class<T> instanceOf, List<Class<T>> classes) {
    InputStream ins = null;//from  w  ww  .  j  a  va  2s .co m
    BufferedReader br = null;

    try {
        String className;
        int count = 0;

        // Get the input stream from the connection.  Need to set the defaultUseCaches
        URLConnection connection = url.openConnection();
        connection.setUseCaches(true);
        ins = connection.getInputStream();

        br = new BufferedReader(new InputStreamReader(ins));
        while ((className = br.readLine()) != null) {
            Class clazz;

            className = className.trim();

            // Ignore blank lines and lines that start with a hash...
            if (className.equals("") || className.startsWith("#")) {
                continue;
            }

            try {
                clazz = forName(className, ClassUtil.class);
            } catch (ClassNotFoundException e) {
                logger.debug("Failed to load class '" + className + "'. Class not found.", e);
                continue;
            }

            if (instanceOf.isAssignableFrom(clazz)) {
                if (!contains(clazz.getName(), classes)) {
                    classes.add(clazz);
                }
                logger.debug("Adding " + className + " to list of classes");
                count++;
            } else {
                logger.debug("Not adding class '" + clazz.getName()
                        + "' to list.  Class does not implement/extend '" + instanceOf.getName() + "'.");
            }
        }
        logger.debug("Loaded '" + count + "' classes listed in '" + url + "'.");
    } catch (IOException e) {
        throw new RuntimeException("Failed to read from file : " + url, e);
    } finally {
        close(br);
        close(ins);
    }
}

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From source file:com.impetus.kundera.loader.PersistenceXMLLoader.java

/**
 * Reads the persistence xml content into an object graph and validates it
 * against the related xsd schema.//from w w w.  ja va  2 s  .  co m
 * 
 * @param pathToPersistenceXml
 *            path to the persistence.xml file
 * @return parsed persistence xml as object graph
 * @throws InvalidConfigurationException
 *             if the file could not be parsed or is not valid against the
 *             schema
 */
private static Document getDocument(URL pathToPersistenceXml) throws InvalidConfigurationException {
    InputStream is = null;
    Document xmlRootNode = null;

    try {
        if (pathToPersistenceXml != null) {
            URLConnection conn = pathToPersistenceXml.openConnection();
            conn.setUseCaches(false); // avoid JAR locking on Windows and
                                      // Tomcat.
            is = conn.getInputStream();
        }

        if (is == null) {
            throw new IOException("Failed to obtain InputStream from url: " + pathToPersistenceXml);
        }

        xmlRootNode = parseDocument(is);
        validateDocumentAgainstSchema(xmlRootNode);
    } catch (IOException e) {
        throw new InvalidConfigurationException(e);
    } finally {
        if (is != null) {
            try {
                is.close();
            } catch (IOException ex) {
                log.warn("Input stream could not be closed after parsing persistence.xml, caused by: {}", ex);
            }
        }
    }

    return xmlRootNode;
}

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From source file:net.pms.util.OpenSubtitle.java

public static String postPage(URLConnection connection, String query) throws IOException {
    connection.setDoOutput(true);//from  ww  w.  j  a  v a2  s  .co m
    connection.setDoInput(true);
    connection.setUseCaches(false);
    connection.setDefaultUseCaches(false);
    connection.setRequestProperty("Content-Type", "text/xml");
    connection.setRequestProperty("Content-Length", "" + query.length());
    ((HttpURLConnection) connection).setRequestMethod("POST");
    //LOGGER.debug("opensub query "+query);
    // open up the output stream of the connection
    if (!StringUtils.isEmpty(query)) {
        try (DataOutputStream output = new DataOutputStream(connection.getOutputStream())) {
            output.writeBytes(query);
            output.flush();
        }
    }

    StringBuilder page;
    try (BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()))) {
        page = new StringBuilder();
        String str;
        while ((str = in.readLine()) != null) {
            page.append(str.trim());
            page.append("\n");
        }
    }
    //LOGGER.debug("opensubs result page "+page.toString());
    return page.toString();
}

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From source file:tkwatch.Utilities.java

/**
 * Issues a TradeKing API request. Adapted from the <i>TradeKing API
 * Reference Guide</i>, 03.25.2011, p. 51.
 * //w  ww. ja  v a 2 s  . c o  m
 * @param resourceUrl
 *            The URL to which API requests must be made.
 * @param body
 *            The body of the API request.
 * @param appKey
 *            The user's application key.
 * @param userKey
 *            The user's key.
 * @param userSecret
 *            The user's secret key.
 * @return Returns the result of the API request.
 */
public static final String tradeKingRequest(final String resourceUrl, final String body, final String appKey,
        final String userKey, final String userSecret) {
    String response = new String();
    try {
        String timestamp = String.valueOf(Calendar.getInstance().getTimeInMillis());
        String request_data = body + timestamp;
        String signature = generateSignature(request_data, userSecret);
        URL url = new URL(resourceUrl);
        URLConnection conn = url.openConnection();
        conn.setDoInput(true);
        conn.setDoOutput(true);
        conn.setUseCaches(false);
        conn.setRequestProperty("Content-Type", "application/xml");
        conn.setRequestProperty("Accept", "application/xml");
        conn.setRequestProperty("TKI_TIMESTAMP", timestamp);
        conn.setRequestProperty("TKI_SIGNATURE", signature);
        conn.setRequestProperty("TKI_USERKEY", userKey);
        conn.setRequestProperty("TKI_APPKEY", appKey);
        DataOutputStream out = new DataOutputStream(conn.getOutputStream());
        out.writeBytes(body);
        out.flush();
        out.close();
        BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
        String temp;
        while ((temp = in.readLine()) != null) {
            response += temp + "\n";
        }
        in.close();
        return response;
    } catch (java.security.SignatureException e) {
        errorMessage(e.getMessage());
        return "";
    } catch (java.io.IOException e) {
        errorMessage(e.getMessage());
        return "";
    }
}

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From source file:org.spoutcraft.launcher.util.Utils.java

public static String executePost(String targetURL, String urlParameters, JProgressBar progress)
        throws PermissionDeniedException {
    URLConnection connection = null;
    try {//  w  w w.j ava2s.  c  om
        URL url = new URL(targetURL);
        connection = url.openConnection();
        connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

        connection.setRequestProperty("Content-Length", Integer.toString(urlParameters.getBytes().length));
        connection.setRequestProperty("Content-Language", "en-US");

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

        connection.setConnectTimeout(10000);

        connection.connect();

        DataOutputStream wr = new DataOutputStream(connection.getOutputStream());
        wr.writeBytes(urlParameters);
        wr.flush();
        wr.close();

        InputStream is = connection.getInputStream();
        BufferedReader rd = new BufferedReader(new InputStreamReader(is));

        StringBuilder response = new StringBuilder();
        String line;
        while ((line = rd.readLine()) != null) {
            response.append(line);
            response.append('\r');
        }
        rd.close();

        return response.toString();
    } catch (SocketException e) {
        if (e.getMessage().equalsIgnoreCase("Permission denied: connect")) {
            throw new PermissionDeniedException("Permission to login was denied");
        }
    } catch (Exception e) {
        String message = "Login failed...";
        progress.setString(message);
    }
    return null;
}

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From source file:org.codehaus.groovy.grails.io.support.GrailsResourceUtils.java

public static void useCachesIfNecessary(URLConnection con) {
    con.setUseCaches(con.getClass().getName().startsWith("JNLP"));
}

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