Example usage for java.net URL openStream

List of usage examples for java.net URL openStream

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Introduction

In this page you can find the example usage for java.net URL openStream.

Prototype

public final InputStream openStream() throws java.io.IOException

Source Link

Document

Opens a connection to this URL and returns an InputStream for reading from that connection.

Usage

From source file:Main.java

private static void downloadResource(String from, String to) {
    OutputStream outputStream = null;
    BufferedInputStream inputStream = null;
    HttpURLConnection connection = null;
    URL url;
    byte[] buffer = new byte[1024];

    try {//from w w  w  . j a  va 2s.  co  m
        url = new URL(from);

        connection = (HttpURLConnection) url.openConnection();

        connection.setRequestMethod("GET");
        connection.setDoOutput(true);
        connection.connect();
        outputStream = new FileOutputStream(to);

        inputStream = new BufferedInputStream(url.openStream());
        int read;

        while ((read = inputStream.read(buffer)) > 0) {
            outputStream.write(buffer, 0, read);
        }

    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        if (outputStream != null)
            try {
                outputStream.close();
            } catch (IOException e) {
            }
        if (inputStream != null)
            try {
                inputStream.close();
            } catch (IOException e) {
            }
        if (connection != null)
            connection.disconnect();
    }
}

From source file:de.nrw.hbz.deepzoomer.fileUtil.FileUtil.java

/**
 * <p><em>Title: Create a temporary File from a file identified by URL</em></p>
 * <p>Description: Method creates a temporary file from a remote file addressed 
 * an by URL representing the orginal PDF, that should be converted</p>
 * //  www . ja va2s .co m
 * @param fileName
 * @param url
 * @return 
 */
public static String saveUrlToFile(String fileName, String url) {
    File inputFile = new File(Configuration.getTempDirPath() + "/" + fileName);
    log.debug(inputFile.getAbsolutePath());
    InputStream is = null;
    BufferedInputStream bis = null;
    BufferedOutputStream bos = null;
    FileOutputStream fos = null;

    log.info(url);
    try {
        URL inputDocument = new URL(url);
        is = inputDocument.openStream();
        bis = new BufferedInputStream(is);

        fos = new FileOutputStream(inputFile);
        bos = new BufferedOutputStream(fos);
        int i = -1;
        while ((i = bis.read()) != -1) {
            bos.write(i);
        }
        bos.flush();
    } catch (Exception e) {
        log.error(e);
    } finally {
        if (bos != null) {
            try {
                bos.close();
            } catch (IOException ioExc) {
                log.error(ioExc);
            }
        }
        if (fos != null) {
            try {
                fos.close();
            } catch (IOException ioExc) {
                log.error(ioExc);
            }
        }
        if (bis != null) {
            try {
                bis.close();
            } catch (IOException ioExc) {
                log.error(ioExc);
            }
        }
        if (is != null) {
            try {
                is.close();
            } catch (IOException ioExc) {
                log.error(ioExc);
            }
        }
    }
    return inputFile.getName();
}

From source file:hsyndicate.utils.IPUtils.java

public static String getPublicIPAddress() {
    if (cachedPublicIP != null && !cachedPublicIP.isEmpty()) {
        return cachedPublicIP;
    } else {/*from w ww .j a v a2 s .  c  o m*/
        try {
            URL whatismyip = new URL("http://checkip.amazonaws.com");
            BufferedReader in = null;
            try {
                in = new BufferedReader(new InputStreamReader(whatismyip.openStream()));
                String ip = in.readLine();

                // cache
                cachedPublicIP = ip;

                return ip;
            } catch (IOException ex) {
                LOG.error("Exception occurred while querying public ip address to amazonaws.com", ex);
            } finally {
                if (in != null) {
                    try {
                        in.close();
                    } catch (IOException e) {
                        LOG.error("Exception occurred while querying public ip address to amazonaws.com", e);
                    }
                }
            }
        } catch (MalformedURLException ex) {
            LOG.error("Exception occurred while querying public ip address to amazonaws.com", ex);
        }
    }
    return null;
}

From source file:net.sf.ehcache.config.ConfigurationFactory.java

/**
 * Configures a bean from an XML file available as an URL.
 *//*w  w  w. j a  v a2  s. c o m*/
public static Configuration parseConfiguration(final URL url) throws CacheException {
    if (LOG.isDebugEnabled()) {
        LOG.debug("Configuring ehcache from URL: " + url);
    }
    Configuration configuration;
    InputStream input = null;
    try {
        input = url.openStream();
        configuration = parseConfiguration(input);
    } catch (Exception e) {
        throw new CacheException("Error configuring from " + url + ". Initial cause was " + e.getMessage(), e);
    } finally {
        try {
            if (input != null) {
                input.close();
            }
        } catch (IOException e) {
            LOG.error("IOException while closing configuration input stream. Error was " + e.getMessage());
        }
    }
    return configuration;
}

From source file:com.feilong.core.lang.ClassLoaderUtil.java

/**
 * This is a convenience method to load a resource as a stream.
 * //from   w ww. jav a2 s.  c o  m
 * <h3>?:</h3>
 * <blockquote>
 * <ol>
 * <li> <code>resourceName</code>  ? "/" ,?,  ClassLoader???? ?, ??
 * <code>org.springframework.core.io.ClassPathResource#ClassPathResource(String, ClassLoader)</code></li>
 * <li>"",classes </li>
 * </ol>
 * </blockquote>
 * 
 * @param resourceName
 *            The name of the resource to load
 * @param callingClass
 *            The Class object of the calling object
 * @return  <code>resourceName</code> null, {@link NullPointerException}<br>
 *         ??, null
 * @see #getResourceInAllClassLoader(String, Class)
 * @see "org.apache.velocity.util.ClassUtils#getResourceAsStream(Class, String)"
 */
public static InputStream getResourceAsStream(String resourceName, Class<?> callingClass) {
    URL url = getResourceInAllClassLoader(resourceName, callingClass);
    try {
        return url == null ? null : url.openStream();
    } catch (IOException e) {
        String message = Slf4jUtil.format("can not open resourceName:[{}]", resourceName);
        LOGGER.error(message, e);
        throw new UncheckedIOException(message, e);
    }
}

From source file:com.sunchenbin.store.feilong.core.lang.ClassLoaderUtil.java

/**
 * This is a convenience method to load a resource as a stream. <br>
 * The algorithm used to find the resource is given in getResource()
 * /*from  w  ww .  j  av  a  2  s.  co  m*/
 * @param resourceName
 *            The name of the resource to load
 * @param callingClass
 *            The Class object of the calling object
 * @return the resource as stream
 * @see #getResource(String, Class)
 * @see "org.apache.velocity.util.ClassUtils#getResourceAsStream(Class, String)"
 */
public static InputStream getResourceAsStream(String resourceName, Class<?> callingClass) {
    URL url = getResource(resourceName, callingClass);
    try {
        return (url != null) ? url.openStream() : null;
    } catch (IOException e) {
        throw new UncheckedIOException(e);
    }
}

From source file:jcurl.core.io.SetupSaxDeSer.java

public static SetupBuilder parse(final URL file) throws SAXException, IOException {
    if (file.getFile().endsWith("z"))
        return parse(new GZIPInputStream(file.openStream()));
    return parse(file.openStream());
}

From source file:com.intuit.tank.tools.debugger.PanelBuilder.java

private static Headers getHeaders(String serviceUrl) {
    Headers ret = null;//from w  w  w  .j  ava2s.c o  m
    if (StringUtils.isNotBlank(serviceUrl)) {
        InputStream settingsStream = null;
        try {
            URL url = new URL(serviceUrl + HEADERS_PATH);
            LOG.info(
                    "Starting up: making call to tank service url to get settings.xml " + url.toExternalForm());
            settingsStream = url.openStream();
            JAXBContext ctx = JAXBContext.newInstance(Headers.class.getPackage().getName());
            ret = (Headers) ctx.createUnmarshaller().unmarshal(settingsStream);
        } catch (Exception e) {
            LOG.error("Error gettting headers: " + e, e);
        } finally {
            IOUtils.closeQuietly(settingsStream);
        }
    }
    return ret;
}

From source file:Main.java

public static String readTextFromURL(String urlString) throws IOException {

    HttpURLConnection urlConnection = null;

    URL url = new URL(urlString);

    urlConnection = (HttpURLConnection) url.openConnection();

    urlConnection.setRequestMethod("GET");
    urlConnection.setReadTimeout(10000 /* milliseconds */);
    urlConnection.setConnectTimeout(15000 /* milliseconds */);

    urlConnection.setDoOutput(true);// w ww .j  a v a  2  s .  c  om

    urlConnection.connect();

    BufferedReader br = new BufferedReader(new InputStreamReader(url.openStream()));

    char[] buffer = new char[1024];

    String jsonString = new String();

    StringBuilder sb = new StringBuilder();
    String line;
    while ((line = br.readLine()) != null) {
        sb.append(line + "\n");
    }
    br.close();

    return sb.toString();
}

From source file:guiTool.Helper.java

public static String readUrl(String urlString, final String userid, final String password) throws Exception {

    BufferedReader reader = null;
    StringBuilder buffer = null;//from   w  w w . ja  v  a 2  s .  c om
    try {
        URL url = new URL(urlString);

        Authenticator.setDefault(new Authenticator() {
            @Override
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(userid, password.toCharArray());
            }
        });
        InputStreamReader s = new InputStreamReader(url.openStream());
        //       System.out.println("getEncoding " + s.getEncoding());
        reader = new BufferedReader(s);

        buffer = new StringBuilder();
        int read;
        char[] chars = new char[1024];
        while ((read = reader.read(chars)) != -1) {
            buffer.append(chars, 0, read);
        }

    } catch (Exception e) {
        System.out.println("Exception       " + e.getMessage());
        //  JOptionPane.showMessageDialog(null, "The server or your internet connection could be down.", "connection test", JOptionPane.ERROR_MESSAGE);

    } finally {
        if (reader != null) {
            reader.close();
        }
    }
    return buffer.toString();
}