xsetbg-wsgi.py

   1 #! /usr/bin/env python
   2 """XSetBg (WSGI version)
   3
   4 """
   5
   6 from wsgiref import simple_server
   7 from wsgiref.handlers import SimpleHandler
   8 from wsgiref.simple_server import WSGIServer, make_server
   9 simple_server.ServerHandler = SimpleHandler # Stop logging to stdout
  10
  11 from xsetbg_conf import xsetbg_conf
  12 from xsetbg import change as _change
  13
  14 # get httpd settings from config
  15 if xsetbg_conf.has_option("httpd", "host"):
  16    host = xsetbg_conf.get("httpd", "host")
  17 else:
  18    host = 'localhost'
  19
  20 if xsetbg_conf.has_option("httpd", "port"):
  21    port = xsetbg_conf.getint("httpd", "port")
  22 else:
  23    error("Config must specify a port to listen. Abort.")
  24
  25
  26 commands = {}
  27
  28 def published(func):
  29     commands[func.__name__] = func
  30     return func
  31
  32 @published
  33 def change(force=False):
  34     _change()
  35
  36 @published
  37 def force():
  38     _change(force=True)
  39
  40 @published
  41 def stop():
  42     QuitWSGIServer._quit_flag = True
  43
  44
  45 class QuitWSGIServer(WSGIServer):
  46     _quit_flag = False
  47
  48     def serve_forever(self):
  49         while not self._quit_flag:
  50             self.handle_request()
  51
  52 def app(env, start_response):
  53     command = env['PATH_INFO'][1:] # Remove the leading slash
  54     if command not in commands:
  55         status = '404 Not found'
  56         response_headers = [('Content-type', 'text/plain')]
  57         start_response(status, response_headers)
  58         return ['The command was not found.\n']
  59
  60     try:
  61         commands[command]()
  62     except:
  63         status = '500 Error'
  64         response_headers = [('Content-type', 'text/plain')]
  65         start_response(status, response_headers)
  66         return ['Error occured!\n']
  67
  68     status = '200 OK'
  69     response_headers = [('Content-type', 'text/plain')]
  70     start_response(status, response_headers)
  71     return ['Ok\n']
  72
  73 force()
  74 httpd = make_server(host, port, app, server_class=QuitWSGIServer)
  75 httpd.serve_forever()