WebClient.java Source code

Introduction

Here is the source code for WebClient.java
Source

    import java.io.BufferedReader;
    import java.io.InputStream;
    import java.io.InputStreamReader;
    import java.net.CookieHandler;
    import java.net.CookieManager;
    import java.net.CookiePolicy;
    import java.net.CookieStore;
    import java.net.HttpCookie;
    import java.net.URI;
    import java.net.URL;
    import java.net.URLConnection;
    import java.util.ArrayList;
    import java.util.Collection;
    import java.util.HashMap;
    import java.util.List;
    import java.util.Map;
    import java.util.Set;

    public class WebClient {
        public static void main(String[] args) throws Exception {
            CookieStore store = new MyCookieStore();
            CookiePolicy policy = new MyCookiePolicy();
            CookieManager handler = new CookieManager(store, policy);
            CookieHandler.setDefault(handler);
            URL url = new URL("http://localhost:8080/cookieTest.jsp");
            URLConnection conn = url.openConnection();

            InputStream in = conn.getInputStream();
            BufferedReader reader = new BufferedReader(new InputStreamReader(in));
            String input;
            while ((input = reader.readLine()) != null) {
                System.out.println(input);
            }
            reader.close();

        }
    }

    class MyCookiePolicy implements CookiePolicy {
        public boolean shouldAccept(URI uri, HttpCookie cookie) {
            //    String host = uri.getHost();
            //  return host.equals("localhost");
            return true;
        }
    }

    class MyCookieStore implements CookieStore {
        private Map<URI, List<HttpCookie>> map = new HashMap<URI, List<HttpCookie>>();

        public void add(URI uri, HttpCookie cookie) {
            List<HttpCookie> cookies = map.get(uri);
            if (cookies == null) {
                cookies = new ArrayList<HttpCookie>();
                map.put(uri, cookies);
            }
            cookies.add(cookie);
        }

        public List<HttpCookie> get(URI uri) {
            List<HttpCookie> cookies = map.get(uri);
            if (cookies == null) {
                cookies = new ArrayList<HttpCookie>();
                map.put(uri, cookies);
            }
            return cookies;
        }

        public List<HttpCookie> getCookies() {
            Collection<List<HttpCookie>> values = map.values();
            List<HttpCookie> result = new ArrayList<HttpCookie>();
            for (List<HttpCookie> value : values) {
                result.addAll(value);
            }
            return result;
        }

        public List<URI> getURIs() {
            Set<URI> keys = map.keySet();
            return new ArrayList<URI>(keys);

        }

        public boolean remove(URI uri, HttpCookie cookie) {
            List<HttpCookie> cookies = map.get(uri);
            if (cookies == null) {
                return false;
            }
            return cookies.remove(cookie);
        }

        public boolean removeAll() {
            map.clear();
            return true;
        }
    }

    The

    cookieTest.jsp page

    <%
    Cookie cookie = new Cookie("username", "guest");

    cookie.setMaxAge(100);response.addCookie(cookie);%><html><head><title>HttpCookie Demo</title></head><body>
Add cookie.
    Cookie name = <%=cookie.getName () +". Cookie value = " + cookie.getValue () %>
</body>
</html>



//Reference:
//Java 6 New Features: A Tutorial
//by Budi Kurniawan 
//Brainy Software Corp. 2006
//Chapter 4 - Networking
//# ISBN-10: 0975212885
//# ISBN-13: 978-0975212882