Java HTTP Header getURLHeaders(String u)

Description

get URL Headers

License

Apache License

Declaration

public static Map<String, List<String>> getURLHeaders(String u) throws Exception 

Method Source Code

//package com.java2s;
/*//from  www. ja v  a2s. c om
 * This file is provided to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 * 
 * (C) 2013 John Muellerleile @jrecursive
 *
 */

import java.util.*;
import java.net.*;
import java.io.*;

public class Main {
    public static Map<String, List<String>> getURLHeaders(String u) throws Exception {
        URL url = new URL(u);
        HttpURLConnection.setFollowRedirects(true);
        HttpURLConnection uc = (HttpURLConnection) url.openConnection();
        uc.setConnectTimeout(5000);
        uc.setReadTimeout(5000);
        uc.setRequestMethod("HEAD");
        uc.setRequestProperty("Connection", "Close");
        uc.connect();
        BufferedReader in = new BufferedReader(new InputStreamReader(uc.getInputStream()));
        in.close();
        uc.disconnect();
        Map<String, List<String>> hdrs = uc.getHeaderFields();
        in = null;
        uc = null;
        url = null;
        return hdrs;
    }
}

Related

1. getHeaderField(final URL url, final String name)
2. getHttpResponseHeader(HttpURLConnection http)
3. getIntFromHeader(HttpURLConnection connection, String headerName)
4. getLastModifiedHeader(URL url)
5. getServerHeader(URL httpURL)
6. printHeaderFields(final URL url)
7. printHttpURLConnectionHeaders(HttpURLConnection httpURLConnection)
8. readHeadersFromResponse(HttpURLConnection httpURLConnection)
9. setHeader(final HttpURLConnection couchdbConnection, final String headerName, final String headerValue)