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
  29 def published(func):
  30     commands[func.__name__] = func
  31     return func
  32
  33
  34 @published
  35 def change(force=False):
  36     _change()
  37
  38
  39 @published
  40 def force():
  41     _change(force=True)
  42
  43
  44 @published
  45 def stop():
  46     QuitWSGIServer._quit_flag = True
  47
  48
  49 class QuitWSGIServer(WSGIServer):
  50     _quit_flag = False
  51
  52     def serve_forever(self):
  53         while not self._quit_flag:
  54             self.handle_request()
  55
  56
  57 def app(env, start_response):
  58     command = env['PATH_INFO'][1:]  # Remove the leading slash
  59     if command not in commands:
  60         status = '404 Not found'
  61         response_headers = [('Content-type', 'text/plain')]
  62         start_response(status, response_headers)
  63         return ['The command was not found.\n']
  64
  65     try:
  66         commands[command]()
  67     except:
  68         status = '500 Error'
  69         response_headers = [('Content-type', 'text/plain')]
  70         start_response(status, response_headers)
  71         return ['Error occured!\n']
  72
  73     status = '200 OK'
  74     response_headers = [('Content-type', 'text/plain')]
  75     start_response(status, response_headers)
  76     return ['Ok\n']
  77
  78
  79 force()
  80 httpd = make_server(host, port, app, server_class=QuitWSGIServer)
  81 httpd.serve_forever()