#!/usr/bin/python
#

# Copyright (C) 2013 Google Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
# IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

import sys
import BaseHTTPServer
import SimpleHTTPServer


def main():
  if len(sys.argv) == 2:
    host = "127.0.0.1"

    (_, port) = sys.argv

  elif len(sys.argv) == 3:
    (_, port, host) = sys.argv

  else:
    sys.stderr.write("Usage: %s <port> [<host>]\n" % sys.argv[0])
    sys.stderr.write("\n")
    sys.stderr.write("Provides an HTTP server on the specified TCP port")
    sys.stderr.write(" exporting the current working directory. Binds to")
    sys.stderr.write(" localhost by default.\n")
    sys.exit(1)

  try:
    port = int(port)
  except (ValueError, TypeError), err:
    sys.stderr.write("Invalid port '%s': %s\n" % (port, err))
    sys.exit(1)

  handler = SimpleHTTPServer.SimpleHTTPRequestHandler

  server = BaseHTTPServer.HTTPServer((host, port), handler)
  server.serve_forever()


if __name__ == "__main__":
  main()