12

class Application (object) :

    14

        Our WSGI application, implements the wsgi __call__ interface

    17

    def __init__ (self, handler) :

    18

        """

    19

            Initialize to use the given handler for requests

    20

        """

    22

        self.handler = handler

    24

    def handle_request (self, env, start_response) :

    25

        """

    26

            The actual request handling code

    27

        """

    29

        # build Request object

    30

        request = http.Request(env)

    32

        try :

    33

            # request -> response using our handler

    34

            response = self.handler.handle_request(request)

    36

        except http.ResponseError, err :

    37

            # just use the generated response

    38

            response = err.get_response()

    40

        # send response

    41

        assert response, "No response"

    42

    43

        # send response status/headers

    44

        start_response(response.get_status(), response.get_headers())

    46

        # send respones data

    47

        yield response.get_data()

    48

    49

    def __call__ (self, env, start_response) :

    50

        """

    51

            Wraps handle_request to trap errors

    52

        """

    53

    54

        try :

    55

            # passthrough request_handler

    56

            for chunk in self.handle_request(env, start_response) :

    57

                yield chunk

    58

    59

        except :

    60

            # execption info

    61

            info = sys.exc_info()

    62

    63

            # try and send 500 ISE to browser, if no headers yet...

    64

            start_response("500 Internal Server Error", [('Content-type', "text/plain; charset=utf8")], info)

    65

    66

            # send traceback

    67

            yield traceback.format_exc()

    68