Template for a simple HTTP server for Zero Touch Provisioning with Arista switches

ztc.py

#!/usr/bin/python
# Copyright (c) 2011  StumbleUpon, 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:
#   - Redistributions of source code must retain the above copyright notice,
#     this list of conditions and the following disclaimer.
#   - 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.
#   - Neither the name of the StumbleUpon nor the names of its contributors
#     may be used to endorse or promote products derived from this software
#     without specific prior written permission.
# 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
import SocketServer


def generate_config(mac):
  return "{ mac = %s }\n" % mac


class ZTPServer(SocketServer.ThreadingMixIn, BaseHTTPServer.HTTPServer):
  allow_reuse_address = True


class ZTPHandler(SimpleHTTPServer.SimpleHTTPRequestHandler):
  def do_HEAD(self):
    mac = self.headers.get("X-Arista-SystemMAC")
    if not mac:
      self.send_error(400, "Bad Request, missing X-Arista-SystemMAC header.")
      return
    try:
      config = generate_config(mac)
    except Exception, e:
      self.send_error(500, "Internal Error, unexpected exception: %s" % (e,))
      return
    self.send_response(200, "OK")
    self.send_header("Content-Type", "text/plain; charset=utf-8")
    self.send_header("Content-Length", len(config))
    self.end_headers()
    return config

  def do_GET(self):
    config = self.do_HEAD()
    if config:
      self.wfile.write(config)


def main(args):
  print "Starting ZTP server..."
  rv = 0
  try:
    ZTPServer(("0.0.0.0", 8080), ZTPHandler).serve_forever()
  except KeyboardInterrupt:
    rv = 130
    pass
  print "Terminating..."
  return rv



if __name__ == "__main__":
  sys.exit(main(sys.argv))