Example usage for java.net URL getHost

List of usage examples for java.net URL getHost

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Introduction

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

Prototype

public String getHost()

Source Link

Document

Gets the host name of this URL , if applicable.

Usage

From source file:com.bytelightning.opensource.pokerface.PokerFaceApp.java

public static void main(String[] args) {
    if (JavaVersionAsFloat() < (1.8f - Float.MIN_VALUE)) {
        System.err.println("PokerFace requires at least Java v8 to run.");
        return;//ww  w.j  a  v  a  2 s  .  c  om
    }
    // Configure the command line options parser
    Options options = new Options();
    options.addOption("h", false, "help");
    options.addOption("listen", true, "(http,https,secure,tls,ssl,CertAlias)=Address:Port for https.");
    options.addOption("keystore", true, "Filepath for PokerFace certificate keystore.");
    options.addOption("storepass", true, "The store password of the keystore.");
    options.addOption("keypass", true, "The key password of the keystore.");
    options.addOption("target", true, "Remote Target requestPattern=targetUri"); // NOTE: targetUri may contain user-info and if so will be interpreted as the alias of a cert to be presented to the remote target
    options.addOption("servercpu", true, "Number of cores the server should use.");
    options.addOption("targetcpu", true, "Number of cores the http targets should use.");
    options.addOption("trustany", false, "Ignore certificate identity errors from target servers.");
    options.addOption("files", true, "Filepath to a directory of static files.");
    options.addOption("config", true, "Path for XML Configuration file.");
    options.addOption("scripts", true, "Filepath for root scripts directory.");
    options.addOption("library", true, "JavaScript library to load into global context.");
    options.addOption("watch", false, "Dynamically watch scripts directory for changes.");
    options.addOption("dynamicTargetScripting", false,
            "WARNING! This option allows scripts to redirect requests to *any* other remote server.");

    CommandLine cmdLine = null;
    // parse the command line.
    try {
        CommandLineParser parser = new PosixParser();
        cmdLine = parser.parse(options, args);
        if (args.length == 0 || cmdLine.hasOption('h')) {
            HelpFormatter formatter = new HelpFormatter();
            formatter.setWidth(120);
            formatter.printHelp(PokerFaceApp.class.getSimpleName(), options);
            return;
        }
    } catch (ParseException exp) {
        System.err.println("Parsing failed.  Reason: " + exp.getMessage());
        return;
    } catch (Exception ex) {
        ex.printStackTrace(System.err);
        return;
    }

    XMLConfiguration config = new XMLConfiguration();
    try {
        if (cmdLine.hasOption("config")) {
            Path tmp = Utils.MakePath(cmdLine.getOptionValue("config"));
            if (!Files.exists(tmp))
                throw new FileNotFoundException("Configuration file does not exist.");
            if (Files.isDirectory(tmp))
                throw new FileNotFoundException("'config' path is not a file.");
            // This is a bit of a pain, but but let's make sure we have a valid configuration file before we actually try to use it.
            config.setEntityResolver(new DefaultEntityResolver() {
                @Override
                public InputSource resolveEntity(String publicId, String systemId) throws SAXException {
                    InputSource retVal = super.resolveEntity(publicId, systemId);
                    if ((retVal == null) && (systemId != null)) {
                        try {
                            URL entityURL;
                            if (systemId.endsWith("/PokerFace_v1Config.xsd"))
                                entityURL = PokerFaceApp.class.getResource("/PokerFace_v1Config.xsd");
                            else
                                entityURL = new URL(systemId);
                            URLConnection connection = entityURL.openConnection();
                            connection.setUseCaches(false);
                            InputStream stream = connection.getInputStream();
                            retVal = new InputSource(stream);
                            retVal.setSystemId(entityURL.toExternalForm());
                        } catch (Throwable e) {
                            return retVal;
                        }
                    }
                    return retVal;
                }

            });
            config.setSchemaValidation(true);
            config.setURL(tmp.toUri().toURL());
            config.load();
            if (cmdLine.hasOption("listen"))
                System.out.println("IGNORING 'listen' option because a configuration file was supplied.");
            if (cmdLine.hasOption("target"))
                System.out.println("IGNORING 'target' option(s) because a configuration file was supplied.");
            if (cmdLine.hasOption("scripts"))
                System.out.println("IGNORING 'scripts' option because a configuration file was supplied.");
            if (cmdLine.hasOption("library"))
                System.out.println("IGNORING 'library' option(s) because a configuration file was supplied.");
        } else {
            String[] serverStrs;
            String[] addr = { null };
            String[] port = { null };
            serverStrs = cmdLine.getOptionValues("listen");
            if (serverStrs == null)
                throw new MissingOptionException("No listening addresses specified specified");
            for (int i = 0; i < serverStrs.length; i++) {
                String addrStr;
                String alias = null;
                String protocol = null;
                Boolean https = null;
                int addrPos = serverStrs[i].indexOf('=');
                if (addrPos >= 0) {
                    if (addrPos < 2)
                        throw new IllegalArgumentException("Invalid http argument.");
                    else if (addrPos + 1 >= serverStrs[i].length())
                        throw new IllegalArgumentException("Invalid http argument.");
                    addrStr = serverStrs[i].substring(addrPos + 1, serverStrs[i].length());
                    String[] types = serverStrs[i].substring(0, addrPos).split(",");
                    for (String type : types) {
                        if (type.equalsIgnoreCase("http"))
                            break;
                        else if (type.equalsIgnoreCase("https") || type.equalsIgnoreCase("secure"))
                            https = true;
                        else if (type.equalsIgnoreCase("tls") || type.equalsIgnoreCase("ssl"))
                            protocol = type.toUpperCase();
                        else
                            alias = type;
                    }
                } else
                    addrStr = serverStrs[i];
                ParseAddressString(addrStr, addr, port, alias != null ? 443 : 80);
                config.addProperty("server.listen(" + i + ")[@address]", addr[0]);
                config.addProperty("server.listen(" + i + ")[@port]", port[0]);
                if (alias != null)
                    config.addProperty("server.listen(" + i + ")[@alias]", alias);
                if (protocol != null)
                    config.addProperty("server.listen(" + i + ")[@protocol]", protocol);
                if (https != null)
                    config.addProperty("server.listen(" + i + ")[@secure]", https);
            }
            String servercpu = cmdLine.getOptionValue("servercpu");
            if (servercpu != null)
                config.setProperty("server[@cpu]", servercpu);
            String clientcpu = cmdLine.getOptionValue("targetcpu");
            if (clientcpu != null)
                config.setProperty("targets[@cpu]", clientcpu);

            // Configure static files
            if (cmdLine.hasOption("files")) {
                Path tmp = Utils.MakePath(cmdLine.getOptionValue("files"));
                if (!Files.exists(tmp))
                    throw new FileNotFoundException("Files directory does not exist.");
                if (!Files.isDirectory(tmp))
                    throw new FileNotFoundException("'files' path is not a directory.");
                config.setProperty("files.rootDirectory", tmp.toAbsolutePath().toUri());
            }

            // Configure scripting
            if (cmdLine.hasOption("scripts")) {
                Path tmp = Utils.MakePath(cmdLine.getOptionValue("scripts"));
                if (!Files.exists(tmp))
                    throw new FileNotFoundException("Scripts directory does not exist.");
                if (!Files.isDirectory(tmp))
                    throw new FileNotFoundException("'scripts' path is not a directory.");
                config.setProperty("scripts.rootDirectory", tmp.toAbsolutePath().toUri());
                config.setProperty("scripts.dynamicWatch", cmdLine.hasOption("watch"));
                String[] libraries = cmdLine.getOptionValues("library");
                if (libraries != null) {
                    for (int i = 0; i < libraries.length; i++) {
                        Path lib = Utils.MakePath(libraries[i]);
                        if (!Files.exists(lib))
                            throw new FileNotFoundException(
                                    "Script library does not exist [" + libraries[i] + "].");
                        if (Files.isDirectory(lib))
                            throw new FileNotFoundException(
                                    "Script library is not a file [" + libraries[i] + "].");
                        config.setProperty("scripts.library(" + i + ")", lib.toAbsolutePath().toUri());
                    }
                }
            } else if (cmdLine.hasOption("watch"))
                System.out.println("IGNORING 'watch' option as no 'scripts' directory was specified.");
            else if (cmdLine.hasOption("library"))
                System.out.println("IGNORING 'library' option as no 'scripts' directory was specified.");
        }
        String keyStorePath = cmdLine.getOptionValue("keystore");
        if (keyStorePath != null)
            config.setProperty("keystore", keyStorePath);
        String keypass = cmdLine.getOptionValue("keypass");
        if (keypass != null)
            config.setProperty("keypass", keypass);
        String storepass = cmdLine.getOptionValue("storepass");
        if (storepass != null)
            config.setProperty("storepass", keypass);
        if (cmdLine.hasOption("trustany"))
            config.setProperty("targets[@trustAny]", true);

        config.setProperty("scripts.dynamicTargetScripting", cmdLine.hasOption("dynamicTargetScripting"));

        String[] targetStrs = cmdLine.getOptionValues("target");
        if (targetStrs != null) {
            for (int i = 0; i < targetStrs.length; i++) {
                int uriPos = targetStrs[i].indexOf('=');
                if (uriPos < 2)
                    throw new IllegalArgumentException("Invalid target argument.");
                else if (uriPos + 1 >= targetStrs[i].length())
                    throw new IllegalArgumentException("Invalid target argument.");
                String patternStr = targetStrs[i].substring(0, uriPos);
                String urlStr = targetStrs[i].substring(uriPos + 1, targetStrs[i].length());
                String alias;
                try {
                    URL url = new URL(urlStr);
                    alias = url.getUserInfo();
                    String scheme = url.getProtocol();
                    if ((!"http".equals(scheme)) && (!"https".equals(scheme)))
                        throw new IllegalArgumentException("Invalid target uri scheme.");
                    int port = url.getPort();
                    if (port < 0)
                        port = url.getDefaultPort();
                    urlStr = scheme + "://" + url.getHost() + ":" + port + url.getPath();
                    String ref = url.getRef();
                    if (ref != null)
                        urlStr += "#" + ref;
                } catch (MalformedURLException ex) {
                    throw new IllegalArgumentException("Malformed target uri");
                }
                config.addProperty("targets.target(" + i + ")[@pattern]", patternStr);
                config.addProperty("targets.target(" + i + ")[@url]", urlStr);
                if (alias != null)
                    config.addProperty("targets.target(" + i + ")[@alias]", alias);
            }
        }
        //         config.save(System.out);
    } catch (Throwable e) {
        e.printStackTrace(System.err);
        return;
    }
    // If we get here, we have a possibly valid configuration.
    try {
        final PokerFace p = new PokerFace();
        p.config(config);
        if (p.start()) {
            PokerFace.Logger.warn("Started!");
            Runtime.getRuntime().addShutdownHook(new Thread() {
                public void run() {
                    try {
                        PokerFace.Logger.warn("Initiating shutdown...");
                        p.stop();
                        PokerFace.Logger.warn("Shutdown completed!");
                    } catch (Throwable e) {
                        PokerFace.Logger.error("Failed to shutdown cleanly!");
                        e.printStackTrace(System.err);
                    }
                }
            });
        } else {
            PokerFace.Logger.error("Failed to start!");
            System.exit(-1);
        }
    } catch (Throwable e) {
        e.printStackTrace(System.err);
    }
}

From source file:com.sforce.dataset.DatasetUtilMain.java

public static void main(String[] args) {

    printBanner();//from w  w  w.  j a v  a2 s. com

    DatasetUtilParams params = new DatasetUtilParams();

    if (args.length > 0)
        params.server = false;

    System.out.println("");
    System.out.println("DatsetUtils called with {" + args.length + "} Params:");

    for (int i = 0; i < args.length; i++) {
        if ((i & 1) == 0) {
            System.out.print("{" + args[i] + "}");
        } else {
            if (i > 0 && args[i - 1].equalsIgnoreCase("--p"))
                System.out.println(":{*******}");
            else
                System.out.println(":{" + args[i] + "}");
        }

        if (i > 0 && args[i - 1].equalsIgnoreCase("--server")) {
            if (args[i] != null && args[i].trim().equalsIgnoreCase("false"))
                params.server = false;
            else if (args[i] != null && args[i].trim().equalsIgnoreCase("true"))
                params.server = true;
        }
    }
    System.out.println("");

    if (!printlneula(params.server)) {
        System.out.println(
                "You do not have permission to use this software. Please delete it from this computer");
        System.exit(-1);
    }

    String action = null;

    if (args.length >= 2) {
        for (int i = 1; i < args.length; i = i + 2) {
            if (args[i - 1].equalsIgnoreCase("--help") || args[i - 1].equalsIgnoreCase("-help")
                    || args[i - 1].equalsIgnoreCase("help")) {
                printUsage();
            } else if (args[i - 1].equalsIgnoreCase("--u")) {
                params.username = args[i];
            } else if (args[i - 1].equalsIgnoreCase("--p")) {
                params.password = args[i];
            } else if (args[i - 1].equalsIgnoreCase("--sessionId")) {
                params.sessionId = args[i];
            } else if (args[i - 1].equalsIgnoreCase("--token")) {
                params.token = args[i];
            } else if (args[i - 1].equalsIgnoreCase("--endpoint")) {
                params.endpoint = args[i];
            } else if (args[i - 1].equalsIgnoreCase("--action")) {
                action = args[i];
            } else if (args[i - 1].equalsIgnoreCase("--operation")) {
                if (args[i] != null) {
                    if (args[i].equalsIgnoreCase("overwrite")) {
                        params.Operation = args[i];
                    } else if (args[i].equalsIgnoreCase("upsert")) {
                        params.Operation = args[i];
                    } else if (args[i].equalsIgnoreCase("append")) {
                        params.Operation = args[i];
                    } else if (args[i].equalsIgnoreCase("delete")) {
                        params.Operation = args[i];
                    } else {
                        System.out.println("Invalid Operation {" + args[i]
                                + "} Must be Overwrite or Upsert or Append or Delete");
                        System.exit(-1);
                    }
                }
            } else if (args[i - 1].equalsIgnoreCase("--debug")) {
                params.debug = true;
                DatasetUtilConstants.debug = true;
            } else if (args[i - 1].equalsIgnoreCase("--ext")) {
                DatasetUtilConstants.ext = true;
            } else if (args[i - 1].equalsIgnoreCase("--inputFile")) {
                String tmp = args[i];
                if (tmp != null) {
                    File tempFile = new File(tmp);
                    if (tempFile.exists()) {
                        params.inputFile = tempFile.toString();
                    } else {
                        System.out.println("File {" + args[i] + "} does not exist");
                        System.exit(-1);
                    }
                }
            } else if (args[i - 1].equalsIgnoreCase("--dataset")) {
                params.dataset = args[i];
            } else if (args[i - 1].equalsIgnoreCase("--datasetLabel")) {
                params.datasetLabel = args[i];
            } else if (args[i - 1].equalsIgnoreCase("--app")) {
                params.app = args[i];
            } else if (args[i - 1].equalsIgnoreCase("--useBulkAPI")) {
                if (args[i] != null && args[i].trim().equalsIgnoreCase("true"))
                    params.useBulkAPI = true;
            } else if (args[i - 1].equalsIgnoreCase("--uploadFormat")) {
                if (args[i] != null && args[i].trim().equalsIgnoreCase("csv"))
                    params.uploadFormat = "csv";
                else if (args[i] != null && args[i].trim().equalsIgnoreCase("binary"))
                    params.uploadFormat = "binary";
            } else if (args[i - 1].equalsIgnoreCase("--rowLimit")) {
                if (args[i] != null && !args[i].trim().isEmpty())
                    params.rowLimit = (new BigDecimal(args[i].trim())).intValue();
            } else if (args[i - 1].equalsIgnoreCase("--rootObject")) {
                params.rootObject = args[i];
            } else if (args[i - 1].equalsIgnoreCase("--fileEncoding")) {
                params.fileEncoding = args[i];
            } else if (args[i - 1].equalsIgnoreCase("--server")) {
                if (args[i] != null && args[i].trim().equalsIgnoreCase("true"))
                    params.server = true;
                else if (args[i] != null && args[i].trim().equalsIgnoreCase("false"))
                    params.server = false;
            } else if (args[i - 1].equalsIgnoreCase("--codingErrorAction")) {
                if (args[i] != null) {
                    if (args[i].equalsIgnoreCase("IGNORE")) {
                        params.codingErrorAction = CodingErrorAction.IGNORE;
                    } else if (args[i].equalsIgnoreCase("REPORT")) {
                        params.codingErrorAction = CodingErrorAction.REPORT;
                    } else if (args[i].equalsIgnoreCase("REPLACE")) {
                        params.codingErrorAction = CodingErrorAction.REPLACE;
                    }
                }
            } else {
                printUsage();
                System.out.println("\nERROR: Invalid argument: " + args[i - 1]);
                System.exit(-1);
            }
        } //end for

        if (params.username != null) {
            if (params.endpoint == null || params.endpoint.isEmpty()) {
                params.endpoint = DatasetUtilConstants.defaultEndpoint;
            }
        }
    }

    if (params.server) {
        System.out.println();
        System.out.println("\n*******************************************************************************");
        try {
            DatasetUtilServer datasetUtilServer = new DatasetUtilServer();
            datasetUtilServer.init(args, true);
        } catch (Exception e) {
            e.printStackTrace();
        }
        System.out.println("Server ended, exiting JVM.....");
        System.out.println("*******************************************************************************\n");
        System.out.println("QUITAPP");
        System.exit(0);
    }

    if (params.sessionId == null) {
        if (params.username == null || params.username.trim().isEmpty()) {
            params.username = getInputFromUser("Enter salesforce username: ", true, false);
        }

        if (params.username.equals("-1")) {
            params.sessionId = getInputFromUser("Enter salesforce sessionId: ", true, false);
            params.username = null;
            params.password = null;
        } else {
            if (params.password == null || params.password.trim().isEmpty()) {
                params.password = getInputFromUser("Enter salesforce password: ", true, true);
            }
        }
    }

    if (params.sessionId != null && !params.sessionId.isEmpty()) {
        while (params.endpoint == null || params.endpoint.trim().isEmpty()) {
            params.endpoint = getInputFromUser("Enter salesforce instance url: ", true, false);
            if (params.endpoint == null || params.endpoint.trim().isEmpty())
                System.out.println("\nERROR: endpoint must be specified when sessionId is specified");
        }

        while (params.endpoint.toLowerCase().contains("login.salesforce.com")
                || params.endpoint.toLowerCase().contains("test.salesforce.com")
                || params.endpoint.toLowerCase().contains("test")
                || params.endpoint.toLowerCase().contains("prod")
                || params.endpoint.toLowerCase().contains("sandbox")) {
            System.out.println("\nERROR: endpoint must be the actual serviceURL and not the login url");
            params.endpoint = getInputFromUser("Enter salesforce instance url: ", true, false);
        }
    } else {
        if (params.endpoint == null || params.endpoint.isEmpty()) {
            params.endpoint = getInputFromUser("Enter salesforce instance url (default=prod): ", false, false);
            if (params.endpoint == null || params.endpoint.trim().isEmpty()) {
                params.endpoint = DatasetUtilConstants.defaultEndpoint;
            }
        }
    }

    try {
        if (params.endpoint.equalsIgnoreCase("PROD") || params.endpoint.equalsIgnoreCase("PRODUCTION")) {
            params.endpoint = DatasetUtilConstants.defaultEndpoint;
        } else if (params.endpoint.equalsIgnoreCase("TEST") || params.endpoint.equalsIgnoreCase("SANDBOX")) {
            params.endpoint = DatasetUtilConstants.defaultEndpoint.replace("login", "test");
        }

        URL uri = new URL(params.endpoint);
        String protocol = uri.getProtocol();
        String host = uri.getHost();
        if (protocol == null || !protocol.equalsIgnoreCase("https")) {
            if (host == null || !(host.toLowerCase().endsWith("internal.salesforce.com")
                    || host.toLowerCase().endsWith("localhost"))) {
                System.out.println("\nERROR: Invalid endpoint. UNSUPPORTED_CLIENT: HTTPS Required in endpoint");
                System.exit(-1);
            }
        }

        if (uri.getPath() == null || uri.getPath().isEmpty() || uri.getPath().equals("/")) {
            uri = new URL(uri.getProtocol(), uri.getHost(), uri.getPort(),
                    DatasetUtilConstants.defaultSoapEndPointPath);
        }
        params.endpoint = uri.toString();
    } catch (MalformedURLException e) {
        e.printStackTrace();
        System.out.println("\nERROR: endpoint is not a valid URL");
        System.exit(-1);
    }

    PartnerConnection partnerConnection = null;
    if (params.username != null || params.sessionId != null) {
        try {
            partnerConnection = DatasetUtils.login(0, params.username, params.password, params.token,
                    params.endpoint, params.sessionId, params.debug);
        } catch (ConnectionException e) {
            e.printStackTrace();
            System.exit(-1);
        } catch (MalformedURLException e) {
            e.printStackTrace();
            System.exit(-1);
        }
    }

    if (args.length == 0 || action == null) {
        //         System.out.println("\n*******************************************************************************");               
        ////         FileListenerUtil.startAllListener(partnerConnection);
        //         try {
        //            Thread.sleep(1000);
        //         } catch (InterruptedException e) {
        //         }
        //         System.out.println("*******************************************************************************\n");   
        //         System.out.println();         

        //         System.out.println("\n*******************************************************************************");               
        //           try {
        //              DatasetUtilServer datasetUtilServer = new DatasetUtilServer();
        //            datasetUtilServer.init(args, false);
        //         } catch (Exception e) {
        //            e.printStackTrace();
        //         }
        //         System.out.println("*******************************************************************************\n");   
        //         System.out.println();         

        while (true) {
            action = getActionFromUser();
            if (action == null || action.isEmpty()) {
                System.exit(-1);
            }
            params = new DatasetUtilParams();
            getRequiredParams(action, partnerConnection, params);
            @SuppressWarnings("unused")
            boolean status = doAction(action, partnerConnection, params);
            //            if(status)
            //            {
            //               if(action.equalsIgnoreCase("load") && params.debug)
            //                  createListener(partnerConnection, params);
            //            }
        }
    } else {
        doAction(action, partnerConnection, params);
    }

}

From source file:Main.java

/**
 * Checks if URL needs Authentication by checking if the domain is bitbucket.org or
 * api.bitbucket.org.//w ww  .j av a  2  s  . c  om
 */
public static Boolean urlNeedsAuthentication(URL url) {
    return "bitbucket.org".equals(url.getHost().toLowerCase())
            || "api.bitbucket.org".equals(url.getHost().toLowerCase());
}

From source file:Main.java

/**
 * Test whether a {@link URL} is a Tor Hidden Service host name, also known
 * as an ".onion address".//from   w  ww. j a  v a 2 s  . com
 *
 * @return whether the host name is a Tor .onion address
 */
public static boolean isOnionAddress(URL url) {
    return url.getHost().endsWith(".onion");
}

From source file:bad.robot.http.apache.Coercions.java

public static HttpHost asHttpHost(URL url) {
    return new HttpHost(url.getHost(), url.getPort(), url.getProtocol());
}

From source file:Main.java

public static boolean isPlaylistUrl(String url) {
    if (url == null) {
        return false;
    }/* w  w w . j  a v  a  2 s  . c  om*/

    try {
        URL _url = new URL(url);
        String host = _url.getHost();
        if (host == null) {
            return false;
        }
        if (!host.contains("nicovideo.jp")) {
            return false;
        }
        String path = _url.getPath();
        if (path == null) {
            return false;
        }
        return path.startsWith("/search") || path.startsWith("/mylist");
    } catch (MalformedURLException e) {
    }

    return false;
}

From source file:Main.java

public static boolean isGravatar(URL url) {
    if (url == null) {
        return false;
    }/*from  w  w  w .  j a v a  2s.  c o m*/
    return url.getHost().equals("gravatar.com") || url.getHost().endsWith(".gravatar.com");
}

From source file:Main.java

public static String getNoQueryUrl(String source) {
    String dest = null;//from   ww  w .jav a 2  s .  com
    try {
        URL sUrl = new URL(source);
        URL dUrl = new URL(sUrl.getProtocol(), sUrl.getHost(), sUrl.getPort(), sUrl.getPath());
        dest = dUrl.toString();
    } catch (MalformedURLException e) {
        e.printStackTrace();
    }
    return dest;
}

From source file:Main.java

public static String restoreAvatarUrl(String stringUrl) {
    try {//from   ww w.java2 s. c om
        StringBuilder sb = new StringBuilder();
        URL url = new URL(stringUrl);
        sb.append(url.getProtocol()).append("://").append(url.getHost()).append(url.getPath());
        return sb.toString();
    } catch (MalformedURLException e) {
        return stringUrl;
    }
}

From source file:Main.java

public static String getHost(String urlString) {
    URL url;
    try {//from  ww  w. j  a va 2s  . c  o m
        url = new URL(urlString);
        return url.getHost();
    } catch (MalformedURLException e) {
        e.printStackTrace();
        return "";
    }
}