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"""

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    WSGI application implementation

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"""

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# for error reporting

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import sys, traceback

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# for Request/Response

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import http

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# for the request -> response bit :)

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import handler

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def request_handler (env, start_response) :

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    """

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        The actual request handling code

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    """

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    # build Request object

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    request = http.Request(env)

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    try :

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        # request -> response

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        response = handler.handle_request(request)

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    except http.ResponseError, err :

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        # just use the generated response

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        response = err.get_response()

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    # send response

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    assert response, "No response"

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    # send response status/headers

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

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    # send respones data

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    yield response.get_data()

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def app (env, start_response) :

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    """

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        Wraps request_handler to trap errors

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    """

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    try :

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        # passthrough request_handler

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        for chunk in request_handler(env, start_response) :

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            yield chunk

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    except :

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        # execption info

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        info = sys.exc_info()

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

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

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        # send traceback

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        yield traceback.format_exc()

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