c# - 我如何阅读/知道才能登录站点并执行操作？

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C# .NET Cookie Handling For After Login
                                
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这是一个小型项目，已作为“自学马拉松代码”的一部分向我分配任务。我需要


登录需要用户/通行证的网站（例如facebook）并返回响应。我设法使用WebRequest和WebResponse类实现了这一点。
下一步是以编程方式向老师发送消息


这就是我感到难过的地方。如何访问网站的“发送消息”功能？我想我需要先查找可以使用Firebug进行查询的查询参数，但是我对如何保持“登录状态”并发送消息感到困惑。我一直在寻找一些信息，我认为它涉及cookie，但是我不确定如何进行。

谢谢。

最佳答案

您需要CookieCollection；在收到登录请求的响应后，您可以从响应中读取cookie。

        var cookies = new CookieContainer();
        ServicePointManager.Expect100Continue = false;
        CookieCollection receivedCookies = new CookieCollection();

        try
        {
            var request = (HttpWebRequest) WebRequest.Create(ServerUrl + "index.php");
            request.Method = "POST";
            request.ContentType = "application/x-www-form-urlencoded";
            request.CookieContainer = cookies;

            string postData = "try=&username=someLogin&password=somepass";
            byte[] byteArray = Encoding.UTF8.GetBytes(postData);
            request.ContentLength = byteArray.Length;

            using (Stream dataStream = request.GetRequestStream())
            {
                dataStream.Write(byteArray, 0, byteArray.Length);
            }

            // Get the response.
            using (WebResponse response = request.GetResponse())
            {
                receivedCookies = ((HttpWebResponse) response).Cookies;
                Logger.DebugFormat("received {0} cookies", receivedCookies.Count);
                using (Stream responseStream = response.GetResponseStream())
                {
                    using (StreamReader reader = new StreamReader(responseStream))
                    {
                        string responseFromServer = reader.ReadToEnd();
                        Logger.DebugFormat("response from server after login-post: {0}", responseFromServer);
                    }
                }
            }
        }
        catch (Exception ex)
        {
            Logger.FatalFormat("there was an exception during login: {0}", ex.Message);
            return (int) CreateResult.GenericError;
        }

在后续请求期间，您必须始终添加该cookie：

            var request =
                (HttpWebRequest)WebRequest.Create(ServerUrl + "index.php?nav=callcenter&sub=ccagents&action=new");
            request.Method = "POST";
            request.ContentType = "application/x-www-form-urlencoded";
            request.CookieContainer = cookies;
            request.CookieContainer.Add(receivedCookies);

关于c# - 我如何阅读/知道才能登录站点并执行操作？ ，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/4555334/