apache httpclient cookies management

In order to manage cookies with Apache HttpClient, you can use the CookieStore interface and the BasicCookieStore implementation provided by the library.

Here's an example that demonstrates how to use CookieStore to manage cookies:

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.CookieStore;
import org.apache.http.client.HttpClient;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.cookie.Cookie;
import org.apache.http.impl.client.BasicCookieStore;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class HttpClientExample {
    public static void main(String[] args) throws Exception {
        String loginUrl = "http://www.example.com/login";
        String username = "username";
        String password = "password";

        CookieStore cookieStore = new BasicCookieStore();

        HttpClient httpClient = HttpClientBuilder.create()
            .setDefaultCookieStore(cookieStore)
            .build();

        HttpPost httpPost = new HttpPost(loginUrl);

        List<BasicNameValuePair> params = new ArrayList<>();
        params.add(new BasicNameValuePair("username", username));
        params.add(new BasicNameValuePair("password", password));
        httpPost.setEntity(new UrlEncodedFormEntity(params));

        httpClient.execute(httpPost);

        HttpGet httpGet = new HttpGet("http://www.example.com/");
        HttpResponse response = httpClient.execute(httpGet);
        HttpEntity entity = response.getEntity();

        if (entity != null) {
            String responseBody = EntityUtils.toString(entity);
            System.out.println(responseBody);
        }

        List<Cookie> cookies = cookieStore.getCookies();
        for (Cookie cookie : cookies) {
            System.out.println("Cookie: " + cookie.getName() + ", Value: " + cookie.getValue());
        }
    }
}

In this example, we first create a CookieStore object using the BasicCookieStore class. We then create an instance of HttpClientBuilder and set the CookieStore object as the default cookie store for the HttpClient object using the setDefaultCookieStore() method. Next, we execute a login request using an HttpPost object and store the returned cookies in the CookieStore object.

After authentication, we create an HttpGet object and execute it using the HttpClient object. We then extract the response body using the EntityUtils class.

Finally, we use the getCookies() method of the CookieStore object to retrieve the cookies returned by the server, and print out the names and values of each cookie.

Note that by default, BasicCookieStore stores all cookies in memory. If you need to persist cookies across multiple sessions, you may want to consider using a different implementation of the CookieStore interface.