CookiePolicy in Java

java.net.CookiePolicy

CookiePolicy implementations decide which cookies should be acceptedand which should be rejected. Three pre-defined policy implementationsare provided, namely ACCEPT_ALL, ACCEPT_NONE and ACCEPT_ORIGINAL_SERVER.

Declaration

public interface CookiePolicy {

    public static final CookiePolicy ACCEPT_ALL = new CookiePolicy() {
        public boolean shouldAccept(URI uri, HttpCookie cookie) {
            return true;
        }
    };

    public static final CookiePolicy ACCEPT_NONE = new CookiePolicy() {
        public boolean shouldAccept(URI uri, HttpCookie cookie) {
            return false;
        }
    };

    public static final CookiePolicy ACCEPT_ORIGINAL_SERVER = new CookiePolicy() {
        public boolean shouldAccept(URI uri, HttpCookie cookie) {
            if (uri == null || cookie == null)
                return false;
            return HttpCookie.domainMatches(cookie.getDomain(), uri.getHost());
        }
    };

    public boolean shouldAccept(URI uri, HttpCookie cookie);
}

Methods

1. shouldAccept(URI uri, HttpCookie cookie)

boolean java.net.CookiePolicy.shouldAccept(URI uri, HttpCookie cookie)

Will be called to see whether or not this cookie should be accepted.

Parameters: Two parameters are required for this method.

URI: the URI to consult accept policy with.

cookie: the HttpCookie object in question.

Returns: true if this cookie should be accepted;otherwise, false.

Approach

Java

package com.CookiePolicy;

import java.net.CookiePolicy;
import java.net.HttpCookie;
import java.net.URI;
import java.net.URISyntaxException;

public class CookiePolicy1 {
    public static void main(String[] args) throws URISyntaxException {

        CookiePolicy cookiePolicy = CookiePolicy.ACCEPT_ALL;

        URI uri = new URI("https://beingcodeexpert.blogspot.com/");
        HttpCookie httpCookie = new HttpCookie("domain", "value");
        System.out.println(cookiePolicy.shouldAccept(uri, httpCookie));
    }
}

Output:

true

2. ACCEPT_ALL

CookiePolicy java.net.CookiePolicy.ACCEPT_ALL

One pre-defined policy which accepts all cookies.

3. ACCEPT_NONE

CookiePolicy java.net.CookiePolicy.ACCEPT_NONE

One pre-defined policy which accepts no cookies.

4. ACCEPT_ORIGINAL_SERVER

CookiePolicy java.net.CookiePolicy.ACCEPT_ORIGINAL_SERVER

One pre-defined policy which only accepts cookies from original server.

Approach

Java

package com.CookiePolicy;

import java.net.CookiePolicy;
import java.net.HttpCookie;
import java.net.URI;
import java.net.URISyntaxException;

public class CookiePolicy1 {
    public static void main(String[] args) 
                  throws URISyntaxException {

        System.out.println(CookiePolicy.ACCEPT_ALL);
        System.out.println(CookiePolicy.ACCEPT_NONE);
        System.out.println(CookiePolicy.ACCEPT_ORIGINAL_SERVER);

        CookiePolicy cookiePolicy = CookiePolicy.ACCEPT_ALL;

        URI uri = new URI("https://beingcodeexpert.blogspot.com/");
        HttpCookie httpCookie = new HttpCookie("domain", "value");
        System.out.println(cookiePolicy.shouldAccept(uri, httpCookie));
    }
}

Output:

java.net.CookiePolicy$1@2401f4c3
java.net.CookiePolicy$2@41a4555e
java.net.CookiePolicy$3@3830f1c0
true

Some other classes/interfaces of java.net

Authenticator: The class Authenticator represents an object that knows how to obtain authentication for a network connection.

BindException: Signals that an error occurred while attempting to bind a socket to a local address and port. 

CacheRequest: Represents channels for storing resources in the ResponseCache.

CacheResponse: Represent channels for retrieving resources from the ResponseCache.

ConnectException: Signals that an error occurred while attempting to connect a socket to a remote address and port.

ContentHandler: The abstract class ContentHandler is the superclass of all classes that read an Object from a URLConnection.

ContentHandlerFactory: This interface defines a factory for content handlers. Implementing this interface should map a MIME type into an instance of ContentHandler.

CookieHandler: A CookieHandler object provides a callback mechanism to hook up an HTTP state management policy implementation into the HTTP protocol handler.

CookieManager: CookieManager provides a concrete implementation of CookieHandler, which separates the storage of cookies from the policy surrounding accepting and rejecting cookies. 

CookiePolicy: CookiePolicy implementations decide which cookies should be accepted and which should be rejected.

CookieStore: A CookieStore object represents storage for cookies. Can store and retrieve cookies.

DatagramPacket: This class represents a datagram packet.