Post and Get based on WebClient implement Http protocol to simulate login and browse websites

An example of Post and Get using WebClient to implement Http protocol is presented in this paper. Share to everybody for everybody reference. The specific analysis is as follows:

1. The question is:

We often need to simulate a browser to do something like vote, or click, or an Web game plug-in.

2. Solutions:

The encapsulated WebClient in C# can implement Post and Get of Http in some less demanding scenarios. See the code below for details:

using System; 

using System.Collections.Generic; 

using System.Linq; 

using System.Text; 

using System.Net;
namespace TestCNM 

{ 

    public class WebClientExt 

    { 

        public string Get(string Url,string Referer, Encoding Encoder,ref string CookieStr) 

        { 

            string result = ""; 

 

            WebClient myClient = new WebClient(); 

            myClient.Headers.Add("Accept: */*"); 

            myClient.Headers.Add("User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Trident/4.0; .NET4.0E; .NET4.0C; InfoPath.2; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; SE 2.X MetaSr 1.0)"); 

            myClient.Headers.Add("Accept-Language: zh-cn"); 

            myClient.Headers.Add("Content-Type: multipart/form-data"); 

            myClient.Headers.Add("Accept-Encoding: gzip, deflate"); 

            myClient.Headers.Add("Cache-Control: no-cache"); 

            if (CookieStr != "") 

            { 

                myClient.Headers.Add(CookieStr); 

            } 

            myClient.Encoding = Encoder; 

            result = myClient.DownloadString(Url); 

            if (CookieStr == "") 

            { 

                CookieStr = myClient.ResponseHeaders["Set-Cookie"].ToString(); 

                CookieStr = GetCookie(CookieStr); 

            } 

            return result; 

        } 

        public string Post(string Url, string Referer, Encoding Encoder, ref string CookieStr, string Data) 

        { 

            string result = ""; 

 

            WebClient myClient = new WebClient(); 

            myClient.Headers.Add("Accept: */*"); 

            myClient.Headers.Add("User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Trident/4.0; .NET4.0E; .NET4.0C; InfoPath.2; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; SE 2.X MetaSr 1.0)"); 

            myClient.Headers.Add("Accept-Language: zh-cn"); 

            myClient.Headers.Add("Content-Type: multipart/form-data"); 

            myClient.Headers.Add("Accept-Encoding: gzip, deflate"); 

            myClient.Headers.Add("Cache-Control: no-cache"); 

            if (CookieStr != "") 

            { 

                myClient.Headers.Add(CookieStr); 

            } 

            myClient.Encoding = Encoder; 

            result = myClient.UploadString(Url, Data); 

            if (CookieStr == "") 

            { 

                CookieStr = myClient.ResponseHeaders["Set-Cookie"].ToString(); 

                CookieStr = GetCookie(CookieStr); 

            } 

            return result; 

        } 

        private string GetCookie(string CookieStr) 

        { 

            string result = ""; 

 

            string[] myArray = CookieStr.Split(','); 

            if (myArray.Count() > 0) 

            { 

                result = "Cookie: "; 

                foreach (var str in myArray) 

                { 

                    string[] CookieArray = str.Split(';'); 

                    result += CookieArray[0].Trim(); 

                    result += "; "; 

                } 

                result = result.Substring(0, result.Length - 2); 

            } 

            return result; 

        } 

    } 

}

Hopefully this article has helped you with your C# programming.