http Server Example

/Console.Write(GetServiceOutput());            //Console.Read();             //listening port 80            int port = 80;            IPAddress localAddr = IPAddress.Parse("127.0.0.1");            TcpListener tcplistener = new TcpListener(localAddr, port);            Console.WriteLine("listening on the port:{0}", port);                        // read incoming request            tcplistener.Start();              while (true)            {                Socket socket = tcplistener.AcceptSocket();                   byte[] buffer = new byte[4096];                socket.Receive(buffer, buffer.Length, 0);                String requestStr = UTF8Encoding.UTF8.GetString(buffer).Replace("\0", "");                Console.WriteLine(requestStr);                // here to parse the request                // accept ?text=                String context = "here is the response.";                // GET                if (requestStr.Contains("?text="))                {                    String[] operators = { "?text=", " " };                    String[] tmp = requestStr.Split(operators, StringSplitOptions.RemoveEmptyEntries);                    context = tmp[2];                }                else                {                    if(requestStr.Contains("name="))                    {                        String[] operators = { "name="};                        String[] tmp = requestStr.Split(operators, StringSplitOptions.RemoveEmptyEntries);                        if(tmp.Length<=1)                        {                            context = "Please enter something.";                        }                        else                        {                            context = tmp[1];                        }                                            }                    else if (requestStr.Contains("num1="))                    {                        String[] operators = { "num1=", "num2=", "&"};                        String[] tmp = requestStr.Split(operators, StringSplitOptions.RemoveEmptyEntries);                        if (tmp.Length <= 1)                        {                            context = "Please enter something.";                        }                        else                        {                            //context = tmp[1];                            // 2 parameters: num1=xxx&num2=xxx                            try                            {                                int num1 = int.Parse(tmp[1]);                                int num2 = int.Parse(tmp[2]);                                int result = num1 + num2;                                context = "the result is " + result.ToString();                            }                            catch (Exception ex)                            {                                context = "the input is not accepted.<br/>" + ex.ToString();                            }                                                    }                    }                    else                    {                        //String postContext =                        //     "<form method='post' action='/'>"                        //    + "<input name='uname'/>"                        //    + "<input type='submit'/>"                        //    + "</form>";                        String postContext2 =                             "<form method='post' action='/'>"                            + "Number1:<input name='num1'/><br/>" + "Number2:<input name='num2'/><br/>"                            + "<input type='submit'/>"                            + "</form>";                        context = postContext2;                    }                }                                webServer ws = new webServer("AEServer");                ws.setContext(context);                String reply = ws.getOKStatus();                buffer = new byte[reply.Length + 1];                int blen = UTF8Encoding.UTF8.GetBytes(reply, 0, reply.Length, buffer, 0);                socket.Send(buffer, blen, 0);                            }

using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace AWS_Console_App1{    class webServer    {        private String httpHeader;        private String httpState;        private String dateTime;        private String Server;        private String lastModified;        private String eTag;        private String contentType;        private String contentLength;        private String AcceptRanges;        private String connection;        private String context;                public void setHttpHeader(String httpHeader)        {            this.httpHeader = httpHeader;        }        public void setHttpState(String httpState)        {            this.httpState = httpState;        }        public void setDateTime(String dateTime)        {            this.dateTime = dateTime;        }        public void setServer(String Server)        {            this.Server = Server;        }        public void setLastModified(String lastModified)        {            this.lastModified = lastModified;        }        public void setETag(String eTag)        {            this.eTag = eTag;        }        public void setContentType(String contentType)        {            this.contentType = contentType;        }        public void setContentLength(String contentLength)        {            this.contentLength = contentLength;        }        public void setAcceptRanges(String AcceptRanges)        {            this.AcceptRanges = AcceptRanges;        }        public void setConnection(String connection)        {            this.connection = connection;        }        public void setContext(String context)        {            this.context = context;        }        public webServer(String serverName)        {            this.httpHeader = "HTTP/1.1";            this.httpState = "200 OK";            this.Server = serverName;              this.contentType = "text/html";            this.AcceptRanges = "bytes";            this.connection = "close";            //this.eTag = "\"56d-9989200-1132c580\"";            //this.lastModified = "Wed, 18 Jun 2003 16:05:58 GMT";        }        public String getOKStatus()        {            Console.WriteLine(this.createResponse("200 OK"));            return this.createResponse("200 OK");        }        public String createResponse(String httpState)        {            /*            "HTTP/1.1 200 OK\n"            "Date: Thu, 19 Feb 2009 12:27:04 GMT\n"            "Server: Apache/2.2.3\n"            "Last-Modified: Wed, 18 Jun 2003 16:05:58 GMT\n"            "ETag: \"56d-9989200-1132c580\"\n"            "Content-Type: text/html\n"            "Content-Length: 15\n"            "Accept-Ranges: bytes\n"            "Connection: close\n"            "\n"            "sdfkjsdnbfkjbsf"            */            StringBuilder output = new StringBuilder();            output.AppendLine("HTTP/1.1 " + httpState);            output.AppendLine("Date: " + DateTime.UtcNow.ToString());            output.AppendLine("Server: " + this.Server);            output.AppendLine("Last-Modified: " + this.lastModified);            output.AppendLine("ETag: " + this.eTag);            output.AppendLine("Content-Type: " + this.contentType);            output.AppendLine("Content-Length: " + this.context.Length);            output.AppendLine("Accept-Ranges: " + this.AcceptRanges);            output.AppendLine("Connection: " + this.connection);            output.AppendLine();            output.AppendLine(this.context);            return output.ToString();            //return            //"HTTP/1.1 200 OK\n"            //+ "Date: Thu, 19 Feb 2009 12:27:04 GMT\n"            //+ "Server: Apache/2.2.3\n"            //+ "Last-Modified: Wed, 18 Jun 2003 16:05:58 GMT\n"            //+ "ETag: \"56d-9989200-1132c580\"\n"            //+ "Content-Type: text/html\n"            //+ "Content-Length: "+ this.context.Length +"\n"            //+ "Accept-Ranges: bytes\n"            //+ "Connection: close\n"            //+ "\n"            //+ this.context;                    }    }}