# -*- Mode: Python; tab-width: 4 -*-

import socket
import default_handler
import re

HOST = re.compile ('Host: ([^:/]+).*', re.IGNORECASE)

get_header = default_handler.get_header

class virtual_handler:

	"""HTTP request handler for an HTTP/1.0-style virtual host.  Each
	Virtual host must have a different IP"""

	def __init__ (self, handler, hostname):
		self.handler = handler
		self.hostname = hostname
		try:
			self.ip = socket.gethostbyname (hostname)
		except socket.error:
			raise ValueError, "Virtual Hostname %s does not appear to be registered in the DNS" % hostname

	def match (self, request):
		if (request.channel.addr[0] == self.ip):
			return 1
		else:
			return 0

	def handle_request (self, request):
		return self.handler.handle_request (request)

	def __repr__ (self):
		return '<virtual request handler for %s>' % self.hostname


class virtual_handler_with_host:

	"""HTTP request handler for HTTP/1.1-style virtual hosts.  This
	matches by checking the value of the 'Host' header in the request.
	You actually don't _have_ to support HTTP/1.1 to use this, since
	many browsers now send the 'Host' header.  This is a Good Thing."""

	def __init__ (self, handler, hostname):
		self.handler = handler
		self.hostname = hostname

	def match (self, request):
		host = get_header (HOST, request.header)
		if host == self.hostname:
			return 1
		else:
			return 0
		
	def handle_request (self, request):
		return self.handler.handle_request (request)

	def __repr__ (self):
		return '<virtual request handler for %s>' % self.hostname