apache/ModPythonJson.py

   1 #
   2 # Apache mod_python interface for JSON requests
   3 #
   4 # Aaron Klingaman <alk@absarokasoft.com>
   5 # Mark Huang <mlhuang@cs.princeton.edu>
   6 #
   7 # Copyright (C) 2004-2006 The Trustees of Princeton University
   8 #
   9
  10 import sys
  11 import traceback
  12 import xmlrpclib
  13 from mod_python import apache
  14
  15 from PLC.Logger import logger
  16
  17 from PLC.API import PLCAPI
  18 api = PLCAPI()
  19
  20 def handler(req):
  21     try:
  22         if req.method != "POST":
  23             req.content_type = "text/html"
  24             req.send_http_header()
  25             req.write("""
  26 <html><head>
  27 <title>PLCAPI JSON Interface</title>
  28 </head><body>
  29 <h1>PLCAPI JSON Interface</h1>
  30 <p>Please POST JSON to access the PLCAPI.</p>
  31 </body></html>
  32 """)
  33             return apache.OK
  34
  35         # Read request
  36         request = req.read(int(req.headers_in['content-length']))
  37
  38         # mod_python < 3.2: The IP address portion of remote_addr is
  39         # incorrect (always 0.0.0.0) when IPv6 is enabled.
  40         # http://issues.apache.org/jira/browse/MODPYTHON-64?page=all
  41         (remote_ip, remote_port) = req.connection.remote_addr
  42         remote_addr = (req.connection.remote_ip, remote_port)
  43
  44         # Handle request
  45         response = api.handle_json(remote_addr, request)
  46
  47         # Shut down database connection, otherwise up to MaxClients DB
  48         # connections will remain open.
  49         api.db.close()
  50
  51         # Write response
  52         req.content_type = "text/json; charset=" + api.encoding
  53         req.send_http_header()
  54         req.write(response)
  55
  56         return apache.OK
  57
  58     except Exception, err:
  59         logger.exception("INTERNAL ERROR !!")
  60         return apache.HTTP_INTERNAL_SERVER_ERROR