一个用C#实现的简单http server（转自中华技术网 www.driverdevelop.com），给楼下的朋友

答案：http.cs 
---------------------------- 
using System; 
using System.Collections; 
using System.IO; 
using System.Net; 
using System.Net.Sockets; 
using System.Threading; 

class HttpProcessor { 

private Socket s; 
private BufferedStream bs; 
private StreamReader sr; 
private StreamWriter sw; 
private String method; 
private String url; 
private String protocol; 
private Hashtable hashTable; 

public HttpProcessor(Socket s) { 
this.s = s; 
hashTable = new Hashtable(); 
} 

public void process() { 
NetworkStream ns = new NetworkStream(s, FileAccess.ReadWrite); 
bs = new BufferedStream(ns); 
sr = new StreamReader(bs); 
sw = new StreamWriter(bs); 
parseRequest(); 
readHeaders(); 
writeURL(); 
s.Shutdown(SocketShutdown.SdBoth); 
ns.Close(); 
} 

public void parseRequest() { 
String request = sr.ReadLine(); 
string[] tokens = request.Split(new char[]{' '}); 
method = tokens[0]; 
url = tokens[1]; 
protocol = tokens[2]; 
} 

public void readHeaders() { 
String line; 
while((line = sr.ReadLine()) != null && line != "") { 
string[] tokens = line.Split(new char[]{':'}); 
String name = tokens[0]; 
String value = ""; 
for(int i = 1; i < tokens.Length; i++) { 
value += tokens[i]; 
if(i < tokens.Length - 1) tokens[i] += ":"; 
} 
hashTable[name] = value; 
} 
} 

public void writeURL() { 
try { 
FileStream fs = new FileStream(url.Substring(1), FileMode.Open, FileAccess.Read); 
writeSuccess(); 
BufferedStream bs2 = new BufferedStream(fs); 
byte[] bytes = new byte[4096]; 
int read; 
while((read = bs2.Read(bytes, 0, bytes.Length)) != 0) { 
bs.Write(bytes, 0, read); 
} 
bs2.Close(); 
} catch(FileNotFoundException) { 
writeFailure(); 
sw.WriteLine("File not found: " + url); 
} 
sw.Flush(); 
} 

public void writeSuccess() { 
sw.WriteLine("HTTP/1.0 200 OK"); 
sw.WriteLine("Connection: close"); 
sw.WriteLine(); 
} 

public void writeFailure() { 
sw.WriteLine("HTTP/1.0 404 File not found"); 
sw.WriteLine("Connection: close"); 
sw.WriteLine(); 
} 
} 

public class HttpServer { 

// ============================================================ 
// Data 

protected int port; 

// ============================================================ 
// Constructor 

public HttpServer() : this(80) { 
} 

public HttpServer(int port) { 
this.port = port; 
} 

// ============================================================ 
// Listener 

public void listen() { 
Socket listener = new Socket(0, SocketType.SockStream, ProtocolType.ProtTCP); 
IPAddress ipaddress = new IPAddress("127.0.0.1"); 
IPEndPoint endpoint = new IPEndPoint(ipaddress, port); 
listener.Bind(endpoint); 
listener.Blocking = true; 
listener.Listen(-1); 
while(true) { 
Socket s = listener.Accept(); 
HttpProcessor processor = new HttpProcessor(s); 
Thread thread = new Thread(new ThreadStart(processor.process)); 
thread.Start(); 
} 
} 

// ============================================================ 
// Main 

public static int Main(String[] args) { 
HttpServer httpServer; 
if(args.GetLength(0) > 0) { 
httpServer = new HttpServer(args[0].ToUInt16()); 
} else { 
httpServer = new HttpServer(); 
} 
Thread thread = new Thread(new ThreadStart(httpServer.listen)); 
thread.Start(); 
return 0; 
} 
} 

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