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using System.Net;
using System.Net.Sockets;
using System.IO;
using System;
using System.Text;
using System.Collections;
namespace T {
public class T {
private static String docroot="/home/dick/mono/install/html";
//private static String docroot="./";
private static Hashtable mime_types = new Hashtable();
private static Socket NetSetup() {
Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
s.Bind(new IPEndPoint(IPAddress.Any, 8000));
Console.WriteLine("Listening on " + s.LocalEndPoint.ToString());
s.Listen(5);
return(s);
}
private static String NetRead(Socket sock) {
byte[] buf=new byte[256];
int count=sock.Receive(buf);
// Supply the length because otherwise I get a
// string of 260-odd chars instead of 30 for some reason
String req=new String(Encoding.UTF8.GetChars(buf), 0, count);
return(req);
}
private static void NetWrite(Socket sock, String data) {
byte[] buf=new UTF8Encoding().GetBytes(data);
sock.Send(buf);
}
private static void ReplyHeaders(Socket sock, int code,
String detail,
String content_type,
String content_opt,
long content_length) {
NetWrite(sock, "HTTP/1.0 " + code + " " + detail + "\r\n");
NetWrite(sock, "Date: Sat, 12 Jan 2002 01:52:56 GMT\r\n");
NetWrite(sock, "Server: MIS\r\n");
NetWrite(sock, "Last-Modified: Sat, 12 Jan 2002 01:52:56 GMT\r\n");
NetWrite(sock, "Connection: close\r\n");
if(content_length>0) {
NetWrite(sock, "Content-Length: " + content_length + "\r\n");
}
NetWrite(sock, "Content-type: " + content_type);
if(content_opt!=null) {
NetWrite(sock, "; " + content_opt);
}
NetWrite(sock, "\r\n");
NetWrite(sock, "\r\n");
}
private static void NotFound(Socket sock) {
ReplyHeaders(sock, 404, "Not Found", "text/html",
"charset=iso-8859-1", 0);
NetWrite(sock, "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\">\r\n");
NetWrite(sock, "<HTML><HEAD>\r\n");
NetWrite(sock, "<TITLE>404 Not Found</TITLE>\r\n");
NetWrite(sock, "</HEAD><BODY>\r\n");
NetWrite(sock, "<H1>Not Found</H1>\r\n");
NetWrite(sock, "</BODY></HTML>\r\n");
}
static void GetHeaders(out String req, out String[] headers,
String data, Socket sock) {
// First, find the \r\n denoting the end of the
// request line
int pos=data.IndexOf("\r\n");
while(pos==-1) {
Console.WriteLine("Couldn't isolate request");
data=data+NetRead(sock);
pos=data.IndexOf("\r\n");
}
req=data.Remove(pos, data.Length-pos);
// We've isolated the request line, now get the headers
// Make sure we have all the headers
pos=data.IndexOf("\r\n\r\n");
while(pos==-1) {
//Console.WriteLine("Didn't read all the headers");
data=data+NetRead(sock);
pos=data.IndexOf("\r\n\r\n");
}
String hdr=data.Remove(0, req.Length+2);
headers=hdr.Split(new char[]{'\r', '\n'});
}
private static void Get(Socket sock, String data) {
String req;
String[] headers;
GetHeaders(out req, out headers, data, sock);
for(int i=0; i<headers.Length; i++) {
if(headers[i].StartsWith("User-Agent: ")) {
Console.WriteLine(headers[i]);
}
}
// Remove the method, and prepend the docroot
req=String.Concat(docroot, req.Remove(0, 4));
// Trim the trailing protocol info
int pos=req.IndexOfAny(new char[]{' '});
if(pos>=0) {
req=req.Remove(pos, req.Length-pos);
}
pos=req.LastIndexOf('.');
String filetype;
if (pos != -1)
filetype = req.Substring(pos);
else
filetype = "";
string mime_type = (string) mime_types [filetype];
if (mime_type == null)
mime_type = "text/plain";
Console.WriteLine("File is " + req);
Console.WriteLine("Mime type is " + mime_type);
try {
FileStream f=new FileStream(req, FileMode.Open, FileAccess.Read);
byte[] fbuf=new byte[256];
ReplyHeaders(sock, 200, "OK",
mime_type,
null, f.Length);
int count;
while((count=f.Read(fbuf, 0, 256))>0) {
// Specify amount, so the last
// block doesnt send extra crud at
// the end
sock.Send(fbuf, count, SocketFlags.None);
}
f.Close();
} catch(FileNotFoundException) {
Console.WriteLine("File not found");
NotFound(sock);
} catch(IOException) {
Console.WriteLine("IO error");
NotFound(sock);
}
}
private static void Head(Socket sock, String data) {
String req;
String[] headers;
GetHeaders(out req, out headers, data, sock);
for(int i=0; i<headers.Length; i++) {
if(headers[i].StartsWith("User-Agent: ")) {
Console.WriteLine(headers[i]);
}
}
// Remove the method, and prepend the docroot
req=String.Concat(docroot, req.Remove(0, 5));
// Trim the trailing protocol info
int pos=req.IndexOfAny(new char[]{' '});
if(pos>=0) {
req=req.Remove(pos, req.Length-pos);
}
pos=req.LastIndexOf('.');
string filetype;
if (pos != -1)
filetype=req.Substring(pos);
else
filetype = "";
string mime_type = (string) mime_types [filetype];
if (mime_type == null)
mime_type = "text/plain";
Console.WriteLine("File is " + req);
Console.WriteLine("Mime type is " + mime_type);
try {
FileStream f=new FileStream(req, FileMode.Open, FileAccess.Read);
byte[] fbuf=new byte[256];
ReplyHeaders(sock, 200, "OK",
mime_type,
null, f.Length);
f.Close();
} catch(FileNotFoundException) {
Console.WriteLine("File not found");
NotFound(sock);
} catch(IOException) {
Console.WriteLine("IO error");
NotFound(sock);
}
}
public static int Main (string [] args) {
// Set up mime types
mime_types.Add(".html", "text/html");
mime_types.Add(".jpeg", "image/jpeg");
mime_types.Add(".png", "image/png");
mime_types.Add(".cs", "text/plain");
if (args.Length == 2 && args [0] == "--root"){
docroot = args [1];
}
Socket s=NetSetup();
while(true) {
Socket newsock=s.Accept();
String req=NetRead(newsock);
if(String.Compare(req, 0, "GET ", 0, 4)==0) {
Get(newsock, req);
} else if(String.Compare(req, 0, "HEAD ", 0, 5)==0) {
Head(newsock, req);
} else {
Console.WriteLine("Unknown method!");
Console.WriteLine("[" + req + "]");
}
newsock.Close();
}
}
}
}
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