尝试使用HttpClient设置会话cookie

Question

帮助将cookie设置为HttpClient

创建了一个登录到外部web服务的程序。但是，要从HTTP GET获取重要信息，我无法传入cookie（从登录生成）。

public class ClientHelper {
    private final static String PROFILE_URL = 
                               "http://externalservice/api/profile.json";
    private final static String LOGIN_URL = "http://externalservice/api/login";

    public static Cookie login(final String username, final String password) {
        DefaultHttpClient client = new DefaultHttpClient();
        HttpPost post = new HttpPost(LOGIN_URL);
        HttpContext localContext = new BasicHttpContext();
        client.getParams().setParameter("http.useragent", "Custom Browser");
        client.getParams().setParameter(CoreProtocolPNames.PROTOCOL_VERSION, 
                                        HttpVersion.HTTP_1_1);
        List<Cookie> cookies = null;
        BasicClientCookie cookie = null;

        try {
            List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(3);
            nameValuePairs.add(new BasicNameValuePair("user", username));
            nameValuePairs.add(new BasicNameValuePair("passwd", password));
            UrlEncodedFormEntity entity = 
                    new UrlEncodedFormEntity(nameValuePairs, HTTP.UTF_8);
            entity.setContentType("application/x-www-form-urlencoded");

            post.setEntity(new UrlEncodedFormEntity(nameValuePairs));
            HttpResponse response = client.execute(post, localContext);
            cookies = client.getCookieStore().getCookies();
            System.out.println(cookies.get(1));

            cookie = new BasicClientCookie(cookies.get(1).getName(), cookies.get(1).getValue());
            cookie.setVersion(cookies.get(1).getVersion());
            cookie.setDomain(cookies.get(1).getDomain());
            cookie.setExpiryDate(cookies.get(1).getExpiryDate());
            cookie.setPath(cookies.get(1).getPath());               
            BufferedReader rd = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));

            String line = "";
            while ((line = rd.readLine()) != null) {
                System.out.println(line);
            }
        } 
        catch (Throwable e) {
            e.printStackTrace();
        }
        return cookie;
   }

   public static void getProfile(Cookie cookie) {
      DefaultHttpClient client = new DefaultHttpClient();
      HttpContext context = new BasicHttpContext();
      CookieStore cookieStore = new BasicCookieStore();
      cookieStore.addCookie(cookie);
      client.setCookieStore(cookieStore);
      context.setAttribute(ClientContext.COOKIE_STORE, cookieStore);
      HttpGet get = new HttpGet(PROFILE_URL);
      HttpResponse response;

      try {
          response = client.execute(get, context);
          BufferedReader rd = 
             new BufferedReader(
                    new InputStreamReader(response.getEntity().getContent()));

          String line = "";
          while ((line = rd.readLine()) != null) {
              System.out.println(line);
          }
       } 
       catch (ClientProtocolException e) {
           e.printStackTrace();
       } 
       catch (IOException e) {
           e.printStackTrace();
       }
   }
}

app.java（使用ClientHelper的类）：

public class App {
   private static final String USER = "myusername";
   private static final String PASSWD = "mypassword";

   public static void main(String[] args) {
       Cookie cookie = ClientHelper.login(USER, PASSWD);
       ClientHelper.getProfile(cookie);
   }
}

当我运行应用程序时，我可以登录（我看到生成的JSON)，但是getProfile（）方法返回一个空的JSON对象：

 {}

在命令行中，我试图使用curl来模拟以下情况：

curl -b Cookie.txt http://externalservice/api/profile.json

Answer 1

尝试执行这部分代码：

List<Cookie> cookies = client.getCookieStore().getCookies();
        for (Cookie cookie : cookies) {
             singleCookie = cookie;
        }

 HttpResponse response = client.execute(post, localContext);