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@chartinger
Created April 9, 2016 07:27
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using System;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Text;
namespace ConsoleWebServer
{
/**
* Based on https://msdn.microsoft.com/en-us/library/6y0e13d3%28v=vs.110%29.aspx
*
* A Simple webserver to demonstrate the HTTP protocol.
*/
class Program
{
// Incoming data from the client.
public static string data = null;
public static void StartListening()
{
// Data buffer for incoming data.
byte[] bytes = new Byte[1024];
// Establish the local endpoint for the socket.
IPEndPoint localEndPoint = new IPEndPoint(IPAddress.Any, 11000);
// Create a TCP/IP socket.
Socket listener = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
// Bind the socket to the local endpoint and
// listen for incoming connections.
try
{
listener.Bind(localEndPoint);
listener.Listen(10);
// Start listening for connections.
while (true)
{
Console.WriteLine("Waiting for a connection...");
// Program is suspended while waiting for an incoming connection.
Socket handler = listener.Accept();
data = null;
// An incoming connection needs to be processed.
while (true)
{
bytes = new byte[1024];
int bytesRec = handler.Receive(bytes);
data += Encoding.ASCII.GetString(bytes, 0, bytesRec);
if (data.Length > 0)
{
break;
}
}
// Show the data on the console.
Console.WriteLine("Text received:");
Console.WriteLine("----------------------------");
Console.WriteLine("{0}", data);
Console.WriteLine("----------------------------");
string request_url = getRequestUrl(data);
string response = getResponseFor(request_url);
// Echo the data back to the client.
byte[] reponse_bytes = Encoding.ASCII.GetBytes(response);
handler.Send(reponse_bytes);
handler.Shutdown(SocketShutdown.Both);
handler.Close();
}
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
Console.WriteLine("\nPress ENTER to continue...");
Console.Read();
}
private static string getRequestUrl(string data)
{
string request_url = "";
using (StringReader sr = new StringReader(data))
{
string request_line;
while ((request_line = sr.ReadLine()) != null)
{
if (request_line.StartsWith("GET"))
{
var request_token = request_line.Split(new[] { ' ' });
if (request_token.Length > 2)
{
request_url = request_token[1];
break;
}
}
}
}
return request_url;
}
private static string getResponseFor(string request_url)
{
StringBuilder response = new StringBuilder();
if (request_url.Equals("/"))
{
response.AppendLine("HTTP/1.0 200 OK");
response.AppendLine("Content-Type: text/html");
response.AppendLine();
response.AppendLine("<html><h1>YEY - Response from our ConsoleWebServer!</h1></html>");
}
else if (request_url.StartsWith("/hello/"))
{
string name = request_url.Split('/')[2];
response.AppendLine("HTTP/1.0 200 OK");
response.AppendLine("Content-Type: text/html");
response.AppendLine();
response.Append("<html><h1>Hello ");
response.Append(name);
response.AppendLine("</h1></html>");
}
else if (request_url.StartsWith("/info.html"))
{
string file_content = File.ReadAllText(@"../../info.html");
response.AppendLine("HTTP/1.0 200 OK");
response.AppendLine("Content-Type: text/html");
response.AppendLine();
response.Append(file_content);
}
else
{
response.AppendLine("HTTP/1.0 404 Not Found");
response.AppendLine("Content-Type: text/html");
response.AppendLine();
response.AppendLine("<html>Oh no! I can't find what you are looking for :(</html>");
}
return response.ToString();
}
static int Main(string[] args)
{
StartListening();
return 0;
}
}
}
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