c# webrequest 自动登入网站

这两天用c# 写了一个自动登入网页的小工具。使用的是发送webrequest的方式。

首先，使用抓包工具fiddler抓取登入页面时发送的request。

通过抓包工具，能够获取登入页面时发送的请求，包括以下内容：

request url

request ContentType

request cookie

request contentType

request userAgent 

request method

post data 等，

在代码中用以上数据实例化一个HttpWebRequest对象，再把request发送出去即可。下面是代码

 string url = "https://10.1.1.1:4100/wgcgi.cgi?action=fw_logon&style=fw_logon.xsl&fw_logon_type=logout";
                string postData = Resource1.String1;// postdata 存储在资源文件中

                byte[] byteRequest = Encoding.Default.GetBytes(postData);
                var request = (HttpWebRequest)HttpWebRequest.Create(url);
                request.CookieContainer = new CookieContainer();
                var cookie = new Cookie("domain", "test.com", "/");
                request.CookieContainer.Add(new Uri(url), cookie);

                var cookie1 = new Cookie("username", "san.zhang", "/");
                request.CookieContainer.Add(new Uri(url), cookie1);

                request.Referer = url;
                request.ContentType = "multipart/form-data; boundary=---------------------------7dd239841324";
                request.ContentLength = 920;
                request.Accept =
                    "application/x-ms-application, image/jpeg, application/xaml+xml, image/gif, image/pjpeg, application/x-ms-xbap, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*";
                request.UserAgent =
                    "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; InfoPath.2; .NET4.0C; .NET4.0E)";
                request.Method = WebRequestMethods.Http.Post;
                request.Timeout = Timeout.Infinite;
                request.KeepAlive = true;
                request.Headers.Add(HttpRequestHeader.AcceptEncoding, "gzip, deflate");
                request.Headers.Add(HttpRequestHeader.AcceptLanguage, "zh-CN");
                ServicePointManager.Expect100Continue = false;

                Stream stream = request.GetRequestStream();
                stream.Write(byteRequest, 0, byteRequest.Length);
                sw.WriteLine(DateTime.Now + ":" + "send http request and receive response");

                // send http request and receive response
                var response = (HttpWebResponse)request.GetResponse();

                // Get html code of reponse page
                var streamResponsePage = response.GetResponseStream();

                StreamReader reader = new StreamReader(streamResponsePage);
                string html = reader.ReadToEnd();
                stream.Close();
                reader.Close();
                streamResponsePage.Close();

 更多抓取网页分析网页的方法请访问：http://www.crifan.com/summary_about_flow_process_of_fetch_webpage_simulate_login_website_and_some_notice/