如何使用网络浏览器连接到 Tcp 服务器？

Question

N.B. 那些评论这个问题的人是广泛的（也，否决和关闭）：你不需要关注细节。唯一的问题是能够使用浏览器。

问题背景：

我有一个要求：我有一个客户端（myClient.exe）和一个服务器（myServer.exe) 正在侦听端口 #43。

客户端可以发送 WHOIS 和 HTTP（0.9、1.0 和 1.1）风格的 GET/PUT/POST 命令到服务器，服务器应该能够理解和响应任何风格的命令。

用户也应该能够使用网络浏览器连接到服务器。

我手里的东西：

我已经实施了 WHOIS 和 HTTP 规则。我面临的唯一问题是，我无法使用普通的互联网浏览器连接到服务器。

服务器运行在localhost:5000地址。我尝试使用 Internet-Explorer 连接到服务器，但失败了。浏览器不断尝试，最终显示失败页面。

我现在需要的是：

我需要一个建议，以便我可以修改我的代码以将我的浏览器连接到 myServer.exe.

源代码：

ClientClass 的源代码是 here。

服务器

class ServerProgram
{
    static Dictionary<string, string> NameLocationDictionary;
    static Dictionary<string, ClientClass> ClientDictionary;

    static void Main(string[] args)
    {
        Console.Title = "Server";

        CommandLineParser parser = new CommandLineParser();
        parser.Args = new List<string>(args);
        parser.FlagChar = new List<string>(new string[] {"-"});
        parser.Acquire();

        if (parser.Count > 0)
        {
            //TODO: log file save
            if (parser.ContainsOption("-l"))
            {
                OptionArgsPosition oap = parser.GetArgument("-l");

                if (oap != null)
                {
                    LogFile.Name = oap.Argument;
                    parser.Remove("-l");
                } 
            }

            if (parser.ContainsOption("-f"))
            {
                OptionArgsPosition oap = parser.GetArgument("-f");

                if (oap != null)
                {
                    TextFile txtFile = new TextFile();
                    txtFile.Name = oap.Argument;
                    string text = txtFile.Read();
                    string[] lines = text.Split(new string []{ "\r\n"}, StringSplitOptions.RemoveEmptyEntries);

                    //load to name-location dictionary
                    foreach (string s in lines)
                    {
                        string [] keyValue = s.Split(',');

                        if (NameLocationDictionary == null)
                        {
                            NameLocationDictionary = new Dictionary<string, string>();
                        }

                        NameLocationDictionary.Add(keyValue[0], keyValue[1]);
                    }

                    parser.Remove("-f");
                }
            }
        }

        ClientDictionary = new Dictionary<string, ClientClass>();

        if (NameLocationDictionary == null)
        {
            NameLocationDictionary = new Dictionary<string, string>();                
            NameLocationDictionary.Add("TONY4", "TONY4-location");
            NameLocationDictionary.Add("xyzgy", "xyzgy-location");
            NameLocationDictionary.Add("cssbct", "RB-336");
        }

        if (string.IsNullOrEmpty(LogFile.Name) || string.IsNullOrWhiteSpace(LogFile.Name))
        {
            LogFile.Name = "log.txt";
        }

        string ipAddress = Constants.LOCAL_HOST_IP;
        int portNo = Constants.PORT_NO;

        IPAddress ip = IPAddress.Parse(ipAddress);
        TcpListener listener = new TcpListener(ip, portNo);
        listener.Start();

        Console.WriteLine("Server program started on address [" + Constants.LOCAL_HOST_IP + ":" + Constants.PORT_NO + "]");

        //// poll for TCP clients in a 2nd thread
        Thread incomingClientThread = new Thread(delegate ()
        {
            ServerProgram.PollIncomingClientConns(listener);
        });
        incomingClientThread.Start();
        Console.ReadLine();

    }

    #region catching client connections
    static void PollIncomingClientConns(TcpListener listener)
    {
        try
        {
            bool keepRunning = true;

            while (keepRunning)
            {
                ClientClass client = new ClientClass(listener);

                if (client.IsConnected)
                {
                    Console.WriteLine("Server connected with client [{0}]", client.ID);

                    ClientDictionary.Add(client.ID, client);

                    Thread thread = new Thread(delegate ()
                    {
                        ServerProgram.ReadFromClient(client);
                    });
                    thread.Start();
                }
            }

            throw new Exception();
        }
        catch (Exception ex)
        {
            var inner = ex.InnerException as SocketException;
            if (inner != null && inner.SocketErrorCode == SocketError.ConnectionReset)
                Console.WriteLine("Disconnected in [ServerProgram.Main.catch]");
            else
                Console.WriteLine(ex.Message);

            listener.Stop();
        }
    } 
    #endregion

    static void ReadFromClient(ClientClass client)
    {
       try
        {
            Console.WriteLine("New Thread of [{0}] in [ServerProgram.ReadfromClient", client.ID);

            CommandLineParser parser = new CommandLineParser();
            parser.FlagChar = new List<string>(new string[] {"-"});

            while (client.Tcp.Connected)
            {
                string args = client.Read();
                args = args.Replace('\r', ' ');
                args = args.Replace('\n', ' ');

                Regex r = new Regex("([^\" ][^ ]*)|(\"[^\"]*\")");
                string [] splittedArgs = r.Matches(args).OfType<Match>().Select(m => m.Value).ToArray();

                parser.Args = new List<string>(splittedArgs);
                parser.Acquire();

                if(args.Contains("GET") || args.Contains("PUT") || args.Contains("POST"))
                {
                    List<string> commands = parser.Args;

                    commands[1] = commands[1].TrimStart(new char[] { '/', ' ', '?'});//recover [name]

                    if (!args.Contains("HTTP")) // HTTP 0.9
                    {
                        #region HTTP 0.9
                        if (commands[0] == "GET")//HTTP-0.9 request received
                        {
                            if (NameLocationDictionary.ContainsKey(commands[1]))
                            {
                                string location = NameLocationDictionary[commands[1]];

                                string responseText = Http09Text.GET_name_Response_Success_3(location);
                                client.Write(responseText);                                    
                                client.Disconnect();
                                Console.WriteLine(responseText);

                                LogFile.Write(client.ClienIPAddess, "GET " + commands[1], ActionType.OK);
                            }
                            else
                            {
                                string responseText = Http09Text.GET_PUT_name_Response_Fail_4();
                                client.Write(responseText);
                                client.Disconnect();
                                Console.WriteLine(responseText);

                                LogFile.Write(client.ClienIPAddess, "GET " + commands[1], ActionType.UNKNOWN);
                            }
                        }
                        if (commands[0] == "PUT")
                        {
                            if (NameLocationDictionary.ContainsKey(commands[1]))//update [location]
                            {
                                NameLocationDictionary[commands[1]] = commands[2];
                                string responseText = Http09Text.PUT_name_location_Response_Success_5(commands[2]);
                                client.Write(responseText);
                                client.Disconnect();
                                Console.WriteLine(responseText);

                                LogFile.Write(client.ClienIPAddess, "PUT " + commands[1] + " " + commands[2], ActionType.OK);
                            }
                            else
                            {
                                string responseText = Http09Text.GET_PUT_name_Response_Fail_4();
                                client.Write(responseText);
                                client.Disconnect();
                                Console.WriteLine(responseText);

                                LogFile.Write(client.ClienIPAddess, "PUT " + commands[1] + " " + commands[2], ActionType.UNKNOWN);
                            }
                        }
                        #endregion
                    }
                    else // HTTP 1.0, or, HTTP 1.1 ...
                    {
                        #region HTTP 1.0
                        if (args.Contains(Constants.HTTP10))
                        {
                            if (commands[0] == "GET")//HTTP-1.0 request received
                            {
                                if (NameLocationDictionary.ContainsKey(commands[1]))
                                {
                                    string location = NameLocationDictionary[commands[1]];

                                    string responseText = Http10Text.GET_name_Response_Success_3(location);
                                    client.Write(responseText);
                                    client.Disconnect();
                                    Console.WriteLine(responseText);

                                    LogFile.Write(client.ClienIPAddess, "GET " + commands[1], ActionType.OK);
                                }
                                else
                                {
                                    string responseText = Http10Text.GET_PUT_name_Response_Fail_4();
                                    client.Write(responseText);
                                    client.Disconnect();
                                    Console.WriteLine(responseText);

                                    LogFile.Write(client.ClienIPAddess, "GET " + commands[1], ActionType.UNKNOWN);
                                }
                            }
                            if (commands[0] == "POST")
                            {
                                List<string> comms = commands;

                                string key = comms[1];
                                string location = comms[comms.Count - 1];

                                if (NameLocationDictionary.ContainsKey(key))//update [location]
                                {
                                    NameLocationDictionary[key] = location;
                                    string responseText = Http10Text.PUT_name_location_Response_Success_5();
                                    client.Write(responseText);
                                    client.Disconnect();
                                    Console.WriteLine(responseText);

                                    LogFile.Write(client.ClienIPAddess, "POST " + key + " " + location, ActionType.OK);
                                }
                                else
                                {
                                    string responseText = Http10Text.GET_PUT_name_Response_Fail_4();
                                    client.Write(responseText);
                                    client.Disconnect();
                                    Console.WriteLine(responseText);

                                    LogFile.Write(client.ClienIPAddess, "POST " + key + " " + location, ActionType.UNKNOWN);
                                }
                            }
                        }
                        #endregion
                        #region HTTP 1.1
                        if (args.Contains(Constants.HTTP11))
                        {
                            if (commands[0] == "GET")//HTTP-1.0 request received
                            {
                                string key = commands[1];

                                if (NameLocationDictionary.ContainsKey(key))
                                {
                                    string location = NameLocationDictionary[key];

                                    string responseText = Http11Text.GET_name_Response_Success_3(location);
                                    client.Write(responseText);
                                    client.Disconnect();
                                    Console.WriteLine(responseText);

                                    LogFile.Write(client.ClienIPAddess, "GET " + key, ActionType.OK);
                                }
                                else
                                {
                                    string responseText = Http11Text.GET_POST_name_Response_Fail_4();
                                    client.Write(responseText);
                                    client.Disconnect();
                                    Console.WriteLine(responseText);

                                    LogFile.Write(client.ClienIPAddess, "GET " + key, ActionType.UNKNOWN);
                                }
                            }
                            if (commands[0] == "POST")
                            {
                                string lastLine = commands[commands.Count - 1];
                                string[] keyLocation = lastLine.Split('&');
                                string[] keyKey = keyLocation[0].Split('=');
                                string[] locLoc = keyLocation[1].Split('=');

                                string key = keyKey[1];
                                string location = locLoc[1];

                                if (NameLocationDictionary.ContainsKey(key))//update [location]
                                {
                                    NameLocationDictionary[key] = location;
                                    string responseText = Http11Text.POST_name_location_Response_Success_5();
                                    client.Write(responseText);
                                    client.Disconnect();
                                    Console.WriteLine(responseText);

                                    LogFile.Write(client.ClienIPAddess, "POST " + key + " " + location, ActionType.OK);
                                }
                                else
                                {
                                    string responseText = Http11Text.GET_POST_name_Response_Fail_4();
                                    client.Write(responseText);
                                    client.Disconnect();
                                    Console.WriteLine(responseText);

                                    LogFile.Write(client.ClienIPAddess, "POST " + key + " " + location, ActionType.UNKNOWN);
                                }
                            }
                        } 
                        #endregion
                    }                                        
                }
                else                    
                {
                    #region WHOIS 
                    List<string> comms = parser.Args;

                    int argCount = comms.Count;

                    if (argCount == 1)//return location
                    {
                        string key = comms[0];

                        if (NameLocationDictionary.ContainsKey(key))
                        {
                            string value = NameLocationDictionary[key];
                            string text = key + " is in " + value;
                            client.Write(text);
                            client.Disconnect();
                            Console.WriteLine(text);

                            LogFile.Write(client.ClienIPAddess, "GET " + key, ActionType.OK);
                        }
                        else
                        {
                            client.Write("ERROR: no entries found!");

                            LogFile.Write(client.ClienIPAddess, "GET " + key, ActionType.UNKNOWN);
                        }
                    }
                    if (argCount == 2)
                    {
                        string key = comms[0];
                        string value = comms[1];

                        if (NameLocationDictionary.ContainsKey(key))//update [location]
                        {
                            NameLocationDictionary[key] = value;
                            client.Write(key + " is in " + value);
                            client.Disconnect();
                            Console.WriteLine(key + " is in " + value);

                            LogFile.Write(client.ClienIPAddess, "PUT " + key + " " + value, ActionType.OK);
                        }
                        else
                        {
                            client.Write("ERROR: no entries found!");
                        }
                    }
                    #endregion
                }
            }
        }
        catch(Exception ex)
        {
            client.Disconnect();
            ClientDictionary.Remove(client.ID);
            client.Dispose();
            client = null;

            Console.WriteLine(ex.Message);
        }
    }

    static void ListConnectedClients()
    {
        while (true)
        {
            Console.Write("Command prompt # ");
            string command = Console.ReadLine();
        }
    }
}

客户端

public class ClientProgram
{
    static string clientID = string.Empty;
    static string otherClientID = string.Empty;
    static string host = string.Empty;
    static int port = -99;

    #region void Start()
    public static void Start(string[] args)
    {
        try
        {
            CommandLineParser parser = new CommandLineParser();
            parser.Args = new List<string>(args);
            parser.FlagChar = new List<string>(new string[] { "-" });
            parser.Acquire();

            host = Constants.LOCAL_HOST_IP;
            port = Constants.PORT_NO;

            if (parser.Options != null)
            {
                if (parser.Options.Contains("-h"))
                {
                    OptionArgsPosition oap = parser.GetArgument("-h");

                    if (oap != null)
                    {
                        if (oap.Argument != null)
                        {
                            host = oap.Argument;
                            parser.Remove("-h");
                        }
                    }
                }
                if (parser.Options.Contains("-p"))
                {
                    OptionArgsPosition oap = parser.GetArgument("-p");

                    if (oap != null)
                    {
                        if (oap.Argument != null)
                        {
                            port = Convert.ToInt32(oap.Argument);
                            parser.Remove("-p");
                        }
                    }
                }
                if (parser.Options.Contains("-h0")
                    || parser.Options.Contains("-h1")
                    || parser.Options.Contains("-h9"))
                {//HTTPClient
                    string name = String.Empty;
                    string location = String.Empty;

                    //Task<string> response = MyHttpClientClass.Getrequest(ip, port.ToString()); 
                    ClientClass client = new ClientClass(host, port);

                    try
                    {
                        Console.Title = "Client " + "[" + client.ID + "]";

                        bool success = client.Connect();

                        if (success)
                        {
                            Console.WriteLine("Client [{0}] is connected.", client.ID);

                            ClientProgram.WriteToHttpServer(client, parser);
                        }
                    }
                    catch (Exception ex)
                    {
                        client.Disconnect();
                        client.Dispose();
                        client = null;

                        Console.WriteLine(ex.Message);
                    }
                }
            }
            else//TCP client
            {
                ClientClass client = new ClientClass(host, port);

                try
                {
                    Console.Title = "Client " + "[" + client.ID + "]";

                    bool success = client.Connect();

                    if (success)
                    {
                        Console.WriteLine("Client [{0}] is connected.", client.ID);

                        ClientProgram.WriteToTcpServer(client, parser);
                    }
                }
                catch (Exception ex)
                {
                    client.Disconnect();
                    client.Dispose();
                    client = null;

                    Console.WriteLine(ex.Message);
                }
            }
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);
        }
    }

    private static void WriteToHttpServer(ClientClass client, CommandLineParser parser)
    {
        try
        {
            if (client.Tcp.Connected)
            {
                if (parser.Count < 0)
                {
                    client.Disconnect();
                    Environment.Exit(0);
                }
                else
                {
                    if (parser.Options.Contains("-h9"))
                    {
                        parser.Remove("-h9");

                        if (parser.Count == 1)
                        {
                            OptionArgsPosition oap = parser[0];

                            if (oap != null)
                            {
                                string str = "GET /" + oap.Option + "\r\n";
                                client.Write(str);
                            }
                        }
                        if (parser.Count == 2)
                        {
                            OptionArgsPosition oapName = parser[0];
                            OptionArgsPosition oapLocation = parser[1];

                            if (oapName != null && oapLocation != null)
                            {
                                string str = "PUT /" + oapName.Option + "\r\n\r\n" + oapLocation.Option + "\r\n";
                                client.Write(str);
                            }
                        }
                    }
                    if (parser.Options.Contains("-h0"))
                    {
                        parser.Remove("-h0");

                        if (parser.Count == 1)
                        {
                            OptionArgsPosition oap = parser[0];

                            if (oap != null)
                            {
                                string str = "GET /?" + oap.Option + " HTTP/1.0\r\n<optional header lines>\r\n";
                                client.Write(str);
                            }
                        }
                        if (parser.Count == 2)
                        {
                            OptionArgsPosition oapName = parser[0];
                            OptionArgsPosition oapLocation = parser[1];

                            if (oapName != null && oapLocation != null)
                            {
                                string str = "POST /" + oapName.Option + " HTTP/1.0\r\nContent-Length: 72\r\n<optional header lines>\r\n" + oapLocation.Option;
                                client.Write(str);
                            }
                        }
                    }
                    if (parser.Options.Contains("-h1"))
                    {
                        parser.Remove("-h1");

                        if (parser.Count == 1)
                        {
                            OptionArgsPosition oap = parser[0];

                            if (oap != null)
                            {
                                string str = "GET /?" + oap.Option + " HTTP/1.1\r\nHost: " + host + "\r\n<optional header lines>\r\n";
                                client.Write(str);
                            }
                        }
                        if (parser.Count == 2)
                        {
                            OptionArgsPosition oapName = parser[0];
                            OptionArgsPosition oapLocation = parser[1];

                            if (oapName != null && oapLocation != null)
                            {
                                string str = "POST HTTP/1.1\r\nHost: " + host + "\r\nContent-Length: 72\r\n<optional header lines>\r\nname=" + oapName.Option + "&location=" + oapLocation.Option;
                                client.Write(str);
                            }
                        }
                    }

                    Console.WriteLine(parser[0].Option);
                    Console.WriteLine("From server : " + client.Read());
                }
            }

            Console.WriteLine("ClientProgram.WriteToTcpServer.Done");
        }
        catch (Exception ex)
        {
            client.Disconnect();
            client.Dispose();
            client = null;

            Console.WriteLine(ex.Message);
        }
    }
    #endregion

    #region void WriteToServer()
    private static void WriteToTcpServer(ClientClass client, CommandLineParser commands)
    {
        //...
    }
    #endregion
}

Answer 1

一个简单的 HTTP 兼容服务器比二进制套接字服务器只领先几步。您已经在写给客户的回复。如果响应的第一行遵循 HTTP 标准，浏览器将能够显示它。

为了说明，这里有几行代码来自我最近的一个项目。

var message = new StringBuilder();
message.Append("HTTP/1.1 200 OK\n\n");
var length = message.Length;
var outgoingBuffer = new ArraySegment<byte>(Encoding.ASCII.GetBytes(message.ToString()));
_client.Close();

MDN 在 https://developer.mozilla.org/en-US/docs/Web/HTTP/Messages.

维护有关 HTTP 请求和响应消息结构的详细文档

如何使用网络浏览器连接到 Tcp 服务器？

How can I connect to a Tcp server using a web browser?

tcp

whois

tcplistener

http