C#-Web服务器

using System;using System.Collections;using System.IO;using System.Net;using System.Net.Sockets;using System.Threading;// offered to the public domain for any use with no restriction// and also with no warranty of any kind, please enjoy. - David Jeske. // simple HTTP explanation// http://www.jmarshall.com/easy/http/namespace Bend.Util {    public class HttpProcessor {        public TcpClient socket;                public HttpServer srv;        private StreamReader inputStream;        public StreamWriter outputStream;        public String http_method;        public String http_url;        public String http_protocol_versionstring;        public Hashtable httpHeaders = new Hashtable();        private static int MAX_POST_SIZE = 10 * 1024 * 1024; // 10MB        public HttpProcessor(TcpClient s, HttpServer srv) {            this.socket = s;            this.srv = srv;                           }        public void process() {                        // bs = new BufferedStream(s.GetStream());            inputStream = new StreamReader(socket.GetStream());            outputStream = new StreamWriter(new BufferedStream(socket.GetStream()));            try {                parseRequest();                readHeaders();                if (http_method.Equals("GET")) {                    handleGETRequest();                } else if (http_method.Equals("POST")) {                    handlePOSTRequest();                }            } catch (Exception e) {                Console.WriteLine("Exception: " + e.ToString());                writeFailure();            }            outputStream.Flush();            // bs.Flush(); // flush any remaining output            inputStream = null; outputStream = null; // bs = null;                        socket.Close();                     }        public void parseRequest() {            String request = inputStream.ReadLine();            string[] tokens = request.Split(' ');            if (tokens.Length != 3) {                throw new Exception("invalid http request line");            }            http_method = tokens[0].ToUpper();            http_url = tokens[1];            http_protocol_versionstring = tokens[2];            Console.WriteLine("starting: " + request);        }        public void readHeaders() {            Console.WriteLine("readHeaders()");            String line;            while ((line = inputStream.ReadLine()) != null) {                if (line.Equals("")) {                    Console.WriteLine("got headers");                    return;                }                                int separator = line.IndexOf(':');                if (separator == -1) {                    throw new Exception("invalid http header line: " + line);                }                String name = line.Substring(0, separator);                int pos = separator + 1;                while ((pos < line.Length) && (line[pos] == ' ')) {                    pos++; // strip any spaces                }                                    string value = line.Substring(pos, line.Length - pos);                Console.WriteLine("header: {0}:{1}",name,value);                httpHeaders[name] = value;            }        }        public void handleGETRequest() {            srv.handleGETRequest(this);        }        public void handlePOSTRequest() {            // this post data processing just reads everything into a memory stream.            // this is fine for smallish things, but for large stuff we should really            // hand an input stream to the request processor. However, the input stream             // we hand him needs to let him see the "end of the stream" at this content             // length, because otherwise he won't know when he's seen it all!             Console.WriteLine("get post data start");            int content_len = 0;            MemoryStream ms = new MemoryStream();            if (this.httpHeaders.ContainsKey("Content-Length")) {                 content_len = Convert.ToInt32(this.httpHeaders["Content-Length"]);                 if (content_len > MAX_POST_SIZE) {                     throw new Exception(                         String.Format("POST Content-Length({0}) too big for this simple server",                           content_len));                 }                 byte[] buf = new byte[4096];                               int to_read = content_len;                 while (to_read > 0) {                     int numread = this.inputStream.BaseStream.Read(buf, 0, Math.Min(4096, to_read));                     to_read -= numread;                     ms.Write(buf, 0, numread);                 }                 ms.Seek(0, SeekOrigin.Begin);            }            Console.WriteLine("get post data end");            srv.handlePOSTRequest(this, new StreamReader(ms));        }        public void writeSuccess() {            outputStream.Write("HTTP/1.0 200 OK\n");            outputStream.Write("Content-Type: text/html\n");            outputStream.Write("Connection: close\n");            outputStream.Write("\n");        }        public void writeFailure() {            outputStream.Write("HTTP/1.0 404 File not found\n");            outputStream.Write("Connection: close\n");            outputStream.Write("\n");        }    }    public abstract class HttpServer {        protected int port;        TcpListener listener;        bool is_active = true;               public HttpServer(int port) {            this.port = port;        }        public void listen() {            listener = new TcpListener(port);            listener.Start();            while (is_active) {                                TcpClient s = listener.AcceptTcpClient();                HttpProcessor processor = new HttpProcessor(s, this);                Thread thread = new Thread(new ThreadStart(processor.process));                thread.Start();                Thread.Sleep(1);            }        }        public abstract void handleGETRequest(HttpProcessor p);        public abstract void handlePOSTRequest(HttpProcessor p, StreamReader inputData);    }    public class MyHttpServer : HttpServer {        public MyHttpServer(int port)            : base(port) {        }        public override void handleGETRequest(HttpProcessor p) {            Console.WriteLine("request: {0}", p.http_url);            p.writeSuccess();            p.outputStream.WriteLine("<html><body><h1>test server</h1>");            p.outputStream.WriteLine("Current Time: " + DateTime.Now.ToString());            p.outputStream.WriteLine("url : {0}", p.http_url);            p.outputStream.WriteLine("<form method=post action=/form>");            p.outputStream.WriteLine("<input type=text name=foo value=foovalue>");            p.outputStream.WriteLine("<input type=submit name=bar value=barvalue>");            p.outputStream.WriteLine("</form>");        }        public override void handlePOSTRequest(HttpProcessor p, StreamReader inputData) {            Console.WriteLine("POST request: {0}", p.http_url);            string data = inputData.ReadToEnd();            p.outputStream.WriteLine("<html><body><h1>test server</h1>");            p.outputStream.WriteLine("<a href=/test>return</a><p>");            p.outputStream.WriteLine("postbody: <pre>{0}</pre>", data);                    }    }    public class TestMain {        public static int Main(String[] args) {            HttpServer httpServer;            if (args.GetLength(0) > 0) {                httpServer = new MyHttpServer(Convert.ToInt16(args[0]));            } else {                httpServer = new MyHttpServer(8080);            }            Thread thread = new Thread(new ThreadStart(httpServer.listen));            thread.Start();            return 0;        }    }}