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", 8090));  //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();

using (Socket socket = new Socket(SocketType.Stream, ProtocolType.Tcp)) //new一个通讯
            {
                socket.Connect(new DnsEndPoint("www.rupeng.com", 80)); //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, 8080));
            socketServer.Listen(10); //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 <= 0)
                        {
                            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
            Socket socketServer = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); //new一个socket通讯
            socketServer.Bind(new IPEndPoint(IPAddress.Any, 8080)); //该通讯监听8080端口
            socketServer.Listen(10); //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 <= 0)
                        {
                            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[1].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_exampleExamOneselfConsole_CoreConsole_CoreFiles", 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
            }  

Socket socketServer = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); //new一个socket通讯
            socketServer.Bind(new IPEndPoint(IPAddress.Any, 8080)); //该通讯监听8080端口
            socketServer.Listen(10); //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 <= 0)
                        {
                            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[1].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 == "123")
                    {
                        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
            }   

/// <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('?')[1]; //username=admin&password=123
            string[] strs = ss.Split('&');
            foreach(string str in strs)
            {
                string[] dds = str.Split('='); //username=admin
                dict[dds[0]] = dds[1];
            }
            return dict;
        }