terom@7: 
terom@7: """
terom@7:     WSGI application implementation
terom@7: """
terom@7: 
terom@7: # for error reporting
terom@7: import sys, traceback
terom@7: 
terom@7: # for Request/Response
terom@7: import http
terom@7: 
terom@7: # for the request -> response bit :)
terom@7: import handler
terom@7: 
terom@7: def request_handler (env, start_response) :
terom@7:     """
terom@7:         The actual request handling code
terom@7:     """
terom@7: 
terom@7:     # build Request object
terom@7:     request = http.Request(env)
terom@7:     
terom@7:     try :
terom@7:         # request -> response
terom@7:         response = handler.handle_request(request)
terom@7: 
terom@7:     except http.ResponseError, err :
terom@7:         # just use the generated response
terom@7:         response = err.get_response()
terom@7: 
terom@7:     # send response
terom@7:     assert response, "No response"
terom@7:     
terom@7:     # send response status/headers
terom@7:     start_response(response.get_status(), response.get_headers())
terom@7: 
terom@7:     # send respones data
terom@7:     yield response.get_data()
terom@7: 
terom@7: def app (env, start_response) :
terom@7:     """
terom@7:         Wraps request_handler to trap errors
terom@7:     """
terom@7: 
terom@7:     try :
terom@7:         # passthrough request_handler
terom@7:         for chunk in request_handler(env, start_response) :
terom@7:             yield chunk
terom@7: 
terom@7:     except :
terom@7:         # execption info
terom@7:         info = sys.exc_info()
terom@7: 
terom@7:         # try and send 500 ISE to browser, if no headers yet...
terom@7:         start_response("500 Internal Server Error", [('Content-type', "text/plain; charset=utf8")], info)
terom@7: 
terom@7:         # send traceback
terom@7:         yield traceback.format_exc()
terom@7: