通过Cookie（setRequestProperty）

Question

我想编写一个Java应用程序，它登录到一个网站，然后通过cookie身份验证导航到不同的站点。 我已经设法登录网站并检索它的代码。 第一个问题：

在循环HeaderFieldKeys时没有“Set-Cookie”键，只有：Date，Server，X-Powered-By，Expires，Last-Modified，Cache-Control，Cache-Control，Pragma，X- UA兼容，X帧选项，严格传输安全，变化，连接，传输编码和内容类型。

正如您在我的代码中看到的，我尝试了另一个代码来检索cookie，这有效。现在有了我想要导航到网站的另一个链接的cookie，但它不起作用。

package myEDKS;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.net.CookieHandler;
import java.net.CookieManager;
import java.net.CookiePolicy;
import java.net.CookieStore;
import java.net.HttpCookie;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;

public class SpielHelfer 
{
    public static HttpCookie cookieW; 
    public static String cookieV;
    @SuppressWarnings("deprecation")
    public static void main(String[] args) 
    {
        try 
        {
            // Instantiate CookieManager;
            // make sure to set CookiePolicy
            CookieManager manager = new CookieManager();
            manager.setCookiePolicy(CookiePolicy.ACCEPT_ALL);
            CookieHandler.setDefault(manager);

            // get content from URLConnection;
            // cookies are set by web site
            URL url = new URL("https://www.w-da.net/wws/109580.php?sid=41853050108060779043427902790460");
            URLConnection con = url.openConnection();


         // activate the output
            con.setDoOutput(true);
            PrintStream ps = new PrintStream(con.getOutputStream());
            // send your parameters to your site
            ps.print("login_login=********");
            ps.print("&login_password=********");

            // we have to get the input stream in order to actually send the request
            con.getInputStream();

            // get cookies from underlying
            // CookieStore
            CookieStore cookieJar =  manager.getCookieStore();
            List <HttpCookie> cookies = cookieJar.getCookies();
            for (HttpCookie cookie: cookies) 
            {
              System.out.println("CookieHandler retrieved cookie: " + cookie);
              cookieW = cookie;
              String cookieC = cookie.getValue();
              int x = cookieC.length();
              cookieV = cookieC;
              System.out.println("**************************************");
            }
        } 
        catch(Exception e) 
        {
            System.out.println("Unable to get cookie using CookieHandler");
            e.printStackTrace();
        }
        System.out.println(cookieW);

        try 
        {
            URL url2 = new URL("https://www.w-da.net/wws/109580.php?sid=41853050108060779043427902790460");
            URLConnection con2 = url2.openConnection();
            con2.setRequestProperty("Cookie", cookieV);
            con2.connect();
            BufferedReader in2 = new BufferedReader(new InputStreamReader(con2.getInputStream()));
            String line2 = null;
            while ((line2 = in2.readLine()) != null) 
            {
                System.out.println(line2);
            }
        } 
        catch(Exception e)
        {
            System.out.println("Unable to set cookie using CookieHandler");
            e.printStackTrace();
        }
    }
}

Answer 1

我不擅长Java，但我建议尝试使用Selenium Webdriver。因为它可以帮助您以更高的方式浏览网站。它包含了所有您需要的功能的漂亮API。因为用这种方式写它会很长很难。