java - HttpClient 不保持登录状态

Question

我正在尝试使用 HttpClient 登录后浏览网站。

我首先定义 HttpClient 的实例以及 cookie 存储:

public HttpClient httpclient = new DefaultHttpClient();
public CookieStore cookieStore = new BasicCookieStore();
public HttpContext localContext = new BasicHttpContext();
localContext.setAttribute(ClientContext.COOKIE_STORE, cookieStore);

在一个(android)BackgroundTask中，我成功登录网站。

HttpPost httppost = new HttpPost("http://www.deeproute.com/deeproute/default.asp");
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("cookieexists","false"));
nameValuePairs.add(new BasicNameValuePair("name", mUser));
nameValuePairs.add(new BasicNameValuePair("password", mPassword));
nameValuePairs.add(new BasicNameValuePair("subbera", "Login"));

httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
res = httpclient.execute(httppost, localContext);

此后，在另一个BackgroundTask中，我尝试连接到同一网站上的不同页面:

HttpGet rosterGet = new HttpGet("http://deeproute.com/deeproute/?sel=rosterlook&myleagueno=6&myteamno=12");
res = httpclient.execute(rosterGet, localContext);

但是，当我连接到此页面时，我不再登录。我查看了一下，成功登录后的 cookie 仍然存在，所以我不知所措。

编辑:郑重声明，该网站在普通浏览器中完全正常运行。

<小时/>

编辑2:为了响应下面Aaron的回答，cookie似乎正在保存，因为如果在第一个请求之后，我会这样做:

List<Cookie> cookies = cookieStore.getCookies();
    int cookieSize = cookies.size();

    for (int i = 0; i < cookieSize; i++) {
        Log.v(TAG, "Cookie " + i + "name: "
                                + cookies.get(i).getName());
        Log.v(TAG, "Cookie " + i + "value: "
                                + cookies.get(i).getValue());
    }

我取回了四个 cookie，其中一个存储了我的用户名。如果我在第二次请求后做同样的事情，我实际上会返回 6 个 cookie，因为显然它给了我一个新的 session ID。这似乎是问题的根源，但我不知道如何解决它。

第一次请求后，这是我的 session ID cookie:

name: ASPSESSIONIDSCSCSBCS
value: GBAJALJBOGKBFLAELPNKEDOE

在第二个请求之后，我有两个 session ID cookie:

name: ASPSESSIONIDSCSCSBCS
value: GBAJALJBOGKBFLAELPNKEDOE

name: ASPSESSIONIDSCSCSBCS
value: MBAJALJBDBOKPEHNCDDFOCBC

Answer 1

我也遇到了同样的问题。我实现了 cookie，但是它仍然没有保持登录状态。我终于让它工作了，所以我发布这段代码，希望可以帮助其他遇到同样问题的人。

以下是 Apache 中有关如何登录和检索所有 cookie 的示例:https://hc.apache.org/httpcomponents-client-ga/httpclient/examples/org/apache/http/examples/client/ClientFormLogin.java

您还可以在此处查看 Apache 的 HttpClient 关于“HTTP 状态管理”的文档:https://hc.apache.org/httpcomponents-client-ga/tutorial/html/statemgmt.html

以下是我的登录功能的实现方式:

1. 使用 CredentialsProvider 设置代理
2. 使用BasicCookieStore设置cookie
3. 使用 CloseableHttpClient 构建自定义 HttpClient
4. 设置POST 请求:目标、主机、参数、路径
5. 执行向/login.html发送POST请求以登录。
6. 对 /user 执行 GET 请求以查看我们是否正确登录

7. 打印响应的状态代码

   //////// SETUP
   //Setup Proxy (If needed)
       CredentialsProvider credsProvider = new BasicCredentialsProvider();
       credsProvider.setCredentials(
               new AuthScope("proxy.mycompany", 8080),
               new UsernamePasswordCredentials("my_username", "my_password"));
   //Setup Cookies
       BasicCookieStore cookieStore = new BasicCookieStore();
   
   //Build HttpClient
       CloseableHttpClient httpclient = HttpClients.custom()
               .setDefaultCredentialsProvider(credsProvider)
               .setDefaultCookieStore(cookieStore)
               .build();
       HttpHost target = new HttpHost("www.mycompany.com", 80, "http");
       HttpHost proxy = new HttpHost("proxy.mycompany", 8080);
       RequestConfig config = RequestConfig.custom()
               .setProxy(proxy)
               .build();
   try {
   //////// LOGIN REQUEST, POST TO /login.html
   //Start POST Request
       HttpPost httppost = new HttpPost('/login.html');
   //Add parameters to POST Request
       List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();   
       nameValuePairs.add(new BasicNameValuePair('username','my_username'));  
       nameValuePairs.add(new BasicNameValuePair('password','my_password'));
       httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
   //Set Config for POST Request
       httppost.setConfig(config);
   //Execute POST Request
       httpresponse = httpclient.execute(target, httppost);
   //Print Response Code
       try {
          System.out.println("Status Code: "+httpresponse.getStatusLine().getStatusCode());
       } finally {
   //Close HTTP Reponse (must be in a 'finally' block)
           httpresponse.close();
       }
   
   //////// CHECK LOGIN STATUS, GET TO /user
   //Start GET Request
       HttpGet httpget = new HttpGet('/user');
   //Set Config for GET Request
       httpget.setConfig(config);
   //Execute GET Request
       httpresponse = httpclient.execute(target, httpget);
   //Print Response Code
       try {
          System.out.println("Status Code: "+httpresponse.getStatusLine().getStatusCode());
       } finally {
   //Close HTTP Reponse (must be in a 'finally' block)
           httpresponse.close();
       }
   } finally {
       httpclient.close();
   }