At 02:32 PM 4/28/2006 -0500, Ian Bicking wrote:
Guido van Rossum wrote:
PEP 333 specifies WSGI, the Python Web Server Gateway Interface v1.0; it's written by Phillip Eby who put a lot of effort in it to make it acceptable to very diverse web frameworks. The PEP has been well received by web framework makers and users.
As a supplement to the PEP, Phillip has written a reference implementation, "wsgiref". I don't know how many people have used wsgiref; I'm using it myself for an intranet webserver and am very happy with it. (I'm asking Phillip to post the URL for the current source; searching for it produces multiple repositories.)
I believe that it would be a good idea to add wsgiref to the stdlib, after some minor cleanups such as removing the extra blank lines that Phillip puts in his code. Having standard library support will remove the last reason web framework developers might have to resist adopting WSGI, and the resulting standardization will help web framework users.
I'd like to include paste.lint with that as well (as wsgiref.lint or whatever). Since the last discussion I enumerated in the docstring all the checks it does. There's still some outstanding issues, mostly where I'm not sure if it is too restrictive (marked with @@ in the source). It's at:
+1, but lose the unused 'global_conf' parameter and 'make_middleware' functions.
I think another useful addition would be some prefix-based dispatcher, similar to paste.urlmap (but probably a bit simpler): http://svn.pythonpaste.org/Paste/trunk/paste/urlmap.py
I'd rather see something a *lot* simpler - something that just takes a dictionary mapping names to application objects, and parses path segments using wsgiref functions. That way, its usefulness as an example wouldn't be obscured by having too many features. Such a thing would still be quite useful, and would illustrate how to do more sophisticated dispatching. Something more or less like: from wsgiref.util import shift_path_info # usage: # main_app = AppMap(foo=part_one, bar=part_two, ...) class AppMap: def __init__(self, **apps): self.apps = apps def __call__(self, environ, start_response): name = shift_path_info(environ) if name is None: return self.default(environ, start_response) elif name in self.apps: return self.apps[name](environ,start_response) return self.not_found(environ, start_response) def default(self, environ, start_response): self.not_found(environ, start_response) def not_found(self, environ, start_response): # code to generate a 404 response here This should be short enough to highlight the concept, while still providing a few hooks for subclassing.