Java URL Connection getHttpHeaders(URLConnection connection)

Declaration

public static Map<String, String> getHttpHeaders(URLConnection connection) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.net.URLConnection;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class Main {
    /**//from   w w  w .  ja va2s  .c  o m
     * Extract HTTP headers from a connection.
     * @param connection Connection with HTTP headers
     * @return Map of HTTP headers <name, value>
     */
    public static Map<String, String> getHttpHeaders(URLConnection connection) {
        Map<String, String> mapHeaders = new HashMap<>();

        for (Map.Entry<String, List<String>> entries : connection.getHeaderFields().entrySet()) {
            mapHeaders.put(entries.getKey() == null ? "Status code" : entries.getKey(),
                    String.join(",", entries.getValue()));
        }

        return mapHeaders;
    }
}

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