ASP.NET CORE Web浏览器和Web服务器

  //web浏览器
             //浏览器本质的原理：浏览器向服务器发请求，服务器把请求的内容返回给浏览器，然后浏览器把返回的内容绘制成一个图形化的界面
             //Socket一种通讯交流的技术
             //qq用户把信息通过socket传给qqServer,然后qqServer通过Socket把信息返回给qq用户
             //创建一个Socket通讯，指定通讯格式是stream，通讯协议是TCP

             //首先需要自己搭建一个cassini服务器,用自己写的浏览器去请求
             Socket socket = new Socket(SocketType.Stream, ProtocolType.Tcp);
             //指定该socket 通讯链接的服务器
             socket.Connect(new DnsEndPoint("127.0.0.1", ));  //需要本地的cassini服务器
             //new一个socket通讯流
             using (Stream stream = new NetworkStream(socket))
             //向socket通讯中写入请求
             using (StreamWriter sw = new StreamWriter(stream))
             {
                 sw.WriteLine("GET /btml5.html HTTP/1.1");
                 sw.WriteLine("Host: 127.0.0.1:8090");
                 sw.WriteLine();//空行回车，表示指令结束
             }
             //从socket通讯中读取内容
             using (Stream stream = new NetworkStream(socket))
             using (StreamReader sr = new StreamReader(stream))
             {
                 string line;
                 while ((line = sr.ReadLine()) != null)
                 {
                     line = sr.ReadLine();
                     Console.WriteLine(line);
                 }
             }
             socket.Disconnect(false);
             Console.ReadKey();

web浏览器：向本机的Cassini服务器发请求并打印返回的内容

 using (Socket socket = new Socket(SocketType.Stream, ProtocolType.Tcp)) //new一个通讯
             {
                 socket.Connect(new DnsEndPoint("www.rupeng.com", )); //链接到服务器
                 using (Stream stream = new NetworkStream(socket)) //通过通讯发送的请求
                 using (StreamWriter sw = new StreamWriter(stream))
                 {
                     sw.WriteLine("GET /index.shtml HTTP/1.1");
                     sw.WriteLine("Host:www.rupeng.com:80");
                     sw.WriteLine();
                 }
                 using (Stream stream = new NetworkStream(socket)) //打印出socket中所请求返回的通讯内容
                 using (StreamReader sr = new StreamReader(stream))
                 {
                     string line;
                     while ((line = sr.ReadLine()) != null)
                     {
                         Console.WriteLine(line);
                     }
                 }
                 socket.Disconnect(false);
             } 

Web浏览器：向www.rupeng.com服务器发请求并打印返回的内容

 ////web服务器
             //new一个模拟的SocketServer
             Socket socketServer = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
             //socketServer绑定到的Ip综节点是任何IP地址,端口是8080
             socketServer.Bind(new IPEndPoint(IPAddress.Any, ));
             socketServer.Listen(); //监听的最大长度是10
             while (true)
             {
                 Console.WriteLine("等着请求");
                 Socket socket = socketServer.Accept(); //socketServer接收到的通讯信息后，开始新的通讯socket
                 Console.WriteLine("来了请求");
                 using (Stream stream = new NetworkStream(socket)) //打印该通讯中的“请求”
                 using (StreamReader sr = new StreamReader(stream))
                 {
                     string line;
                     while ((line = sr.ReadLine()) != null)
                     {
                         Console.WriteLine(line);
                         if (line.Length <= )
                         {
                             break; //退出本次接收到的请求，等待下一次请求
                         }
                     }
                 }

                 using (Stream stream = new NetworkStream(socket)) //返回该通讯请求的内容
                 using (StreamWriter sw = new StreamWriter(stream))
                 {
                     sw.WriteLine("HTTP/1.1 200 OK");
                     sw.WriteLine(); //htp协议规定报文头和正文之间有空行
                     sw.WriteLine("如鹏，您好,hello world");
                 }
                 socket.Disconnect(false); //返回结束 断开该通讯 等待下一次的通讯
             } 

web服务器：打印浏览器的“请求”，并返回给浏览器新的内容

             //web服务器
             Socket socketServer = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); //new一个socket通讯
             socketServer.Bind(new IPEndPoint(IPAddress.Any, )); //该通讯监听8080端口
             socketServer.Listen(); //监听到的请求的最大长度是10
             while (true)
             {
                 string firstLine = "";
                 Console.WriteLine("等着请求");
                 Socket socket = socketServer.Accept(); //socketServer接收到的通讯信息后，开始新的通讯s
                 Console.WriteLine("来了请求");
                 using (Stream stream = new NetworkStream(socket)) //打印该通讯中的“请求”
                 using (StreamReader sr = new StreamReader(stream))
                 {
                     firstLine = sr.ReadLine(); //GET /1.htm HTTP/1.1     //从第一行获得文件名url
                     string line;
                     while ((line = sr.ReadLine()) != null)
                     {
                         Console.WriteLine(line);
                         if (line.Length <= )
                         {
                             break; //退出本次接收到的请求，等待下一次请求
                         }
                     }
                 }

                 string url = "";
                 Match match = Regex.Match(firstLine, "GET\\s/(.+)\\sHTTP/1\\.1");
                 if (match.Success)
                 {
                     url = match.Groups[].Value;
                 }
                 Console.WriteLine(url);

                 using (Stream stream = new NetworkStream(socket)) //返回该通讯请求的内容
                 using (StreamWriter sw = new StreamWriter(stream))
                 {
                     //根据文件url返回页面
                     string file = Path.Combine(@"F:\VisualStudio_example\ExamOneself\Console_Core\Console_Core\Files\", url);
                     if (File.Exists(file))
                     {
                         string html = File.ReadAllText(file);
                         sw.WriteLine("HTTP/1.1 200 OK");
                         sw.WriteLine(); //htp协议规定报文头和正文之间有空行
                         sw.WriteLine(html);
                     }
                     else
                     {
                         sw.WriteLine("HTTP/1.1 404 NOT FOUND");
                         sw.WriteLine();
                         sw.WriteLine("NOT FOUND");
                     }
                 }
                 socket.Disconnect(false); //返回结束 断开该通讯 等待下一次的通讯
             }  

web服务器：根据浏览器请求的url，返回指定的Url界面

 Socket socketServer = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); //new一个socket通讯
             socketServer.Bind(new IPEndPoint(IPAddress.Any, )); //该通讯监听8080端口
             socketServer.Listen(); //监听到的请求的最大长度是10
             while (true)
             {
                 string firstLine = "";
                 Console.WriteLine("等着请求");
                 Socket socket = socketServer.Accept(); //socketServer接收到的通讯信息后，开始新的通讯s
                 Console.WriteLine("来了请求");
                 using (Stream stream = new NetworkStream(socket)) //打印该通讯中的“请求”
                 using (StreamReader sr = new StreamReader(stream))
                 {
                     firstLine = sr.ReadLine(); //GET /login.html?username=admin&password=123 HTTP/1.1     //从第一行获得文件名url
                     string line;
                     while ((line = sr.ReadLine()) != null)
                     {
                         Console.WriteLine(line);
                         if (line.Length <= )
                         {
                             break; //退出本次接收到的请求，等待下一次请求
                         }
                     }
                 }

                 //对请求表头的第一行进行处理
                 string url = "";
                 Match match = Regex.Match(firstLine, "GET\\s/(.+)\\sHTTP/1\\.1");
                 if (match.Success)
                 {
                     url = match.Groups[].Value;
                 }
                 Console.WriteLine(url);
                 Dictionary<string, string> dict = ParseQueryString(url); //login.html?username=admin&password=123
                 string username = dict["username"];
                 string password = dict["password"];

                 using (Stream stream = new NetworkStream(socket)) //返回该通讯请求的内容
                 using (StreamWriter sw = new StreamWriter(stream))
                 {

                     if (username == "admin" && password == "")
                     {
                         sw.WriteLine("HTTP/1.1 200 OK");
                         sw.WriteLine(); //htp协议规定报文头和正文之间有空行
                         sw.WriteLine("LOGIN SUCCESS");
                     }
                     else
                     {
                         sw.WriteLine("HTTP/1.1 404 NOT FOUND");
                         sw.WriteLine();
                         sw.WriteLine("LOGIN ERROR");
                     }
                 }
                 socket.Disconnect(false); //返回结束 断开该通讯 等待下一次的通讯
             }   

web服务器：根据url，返回登陆是否成功

 /// <summary>
         /// 把url中“？”后面的查询字符串转字典
         /// </summary>
         /// <param name="url">url：//login.html?username=admin&password=123</param>
         /// <returns>包含参数的字典</returns>
         private static Dictionary<string,string> ParseQueryString(string url) //login.html?username=admin&password=123
         {
             Dictionary<string, string> dict = new Dictionary<string, string>();
             string ss = url.Split('?')[]; //username=admin&password=123
             string[] strs = ss.Split('&');
             foreach(string str in strs)
             {
                 string[] dds = str.Split('='); //username=admin
                 dict[dds[]] = dds[];
             }
             return dict;
         }

把url中“？”后面的查询字符串转字典