#!/usr/bin/python

import os, sys, time
import BaseHTTPServer

from subprocess import *

HOST_NAME = ''
PORT_NUMBER = 9000 
CMD='echo'

class WebHandler(BaseHTTPServer.BaseHTTPRequestHandler):

	def init(cls, cmd):
		WebHandler.cmd=cmd

	init = classmethod(init)

	def do_GET(self):
		"""Respond to a GET request."""
		self.send_response(200)
		self.end_headers()

		(slash, _cmd_, args)=self.path.partition(self.cmd)
		if _cmd_ != self.cmd:
			self.wfile.write("Not implemented")
			return

		args=[s for s in args.split('+') if s] 

		p = Popen([self.cmd]+args, stdin=PIPE, stdout=PIPE)

		if "content-length" in self.headers:
			p.stdin.write(self.rfile.read(int(self.headers["content-length"])))

		self.wfile.write(p.communicate()[0])
		
	do_POST = do_GET

def usage():
	print ''' to_web.py -p<port> CMD'''
	sys.exit(0)

if __name__ == '__main__':
	server_class = BaseHTTPServer.HTTPServer
	if len(sys.argv) == 1:
		usage()
	elif len(sys.argv) == 2:
		CMD=sys.argv[1]
	elif len(sys.argv) == 3:
		CMD=sys.argv[2]
		if sys.argv[1].startswith("-p"):
			PORT_NUMBER=int(sys.argv[1].split("-p")[1])
		else:
			usage()
	else:
		usage()
		
	WebHandler.init(CMD)
	httpd = server_class((HOST_NAME, PORT_NUMBER), WebHandler)
	print time.asctime(), CMD, "server started - %s" % (PORT_NUMBER)
	try:
		httpd.serve_forever()
	except KeyboardInterrupt:
		pass
	httpd.server_close()
	print time.asctime(), CMD, "server stopped - %s" % (PORT_NUMBER)