Mercurial > hg > wordstream
diff wordstream/dispatcher.py @ 0:8af3412e907a
initial import of wordstream
author | k0s <k0scist@gmail.com> |
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date | Fri, 01 Jan 2010 19:35:32 -0500 |
parents | |
children | e21f53582267 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/wordstream/dispatcher.py Fri Jan 01 19:35:32 2010 -0500 @@ -0,0 +1,69 @@ +""" +request dispatcher: +data persisting across requests should go here +""" + +import os + +from handlers import Index, Feed, Eat, ViewCorpus + +from genshi.template import TemplateLoader +from paste.fileapp import FileApp +from pkg_resources import resource_filename +from webob import Request, Response, exc +from wordstream.api import Corpus + +class Dispatcher(object): + + ### class level variables + defaults = { 'auto_reload': 'False', + 'template_dirs': '', + 'seed': '' } + + def __init__(self, **kw): + + # set instance parameters from kw and defaults + for key in self.defaults: + setattr(self, key, kw.get(key, self.defaults[key])) + self.auto_reload = self.auto_reload.lower() == 'true' + self.corpus = Corpus() + self.corpus.feed_stuff(*self.seed.split()) + + # request handlers + self.handlers = [ Index, ViewCorpus, Feed, Eat ] + + # template loader + self.template_dirs = self.template_dirs.split() + self.template_dirs.append(resource_filename(__name__, 'templates')) + self.loader = TemplateLoader(self.template_dirs, + auto_reload=self.auto_reload) + + def __call__(self, environ, start_response): + + # get a request object + request = Request(environ) + + # get the path + path = request.path_info.strip('/').split('/') + if path == ['']: + path = [] + request.environ['path'] = path + + # match the request to a handler + for h in self.handlers: + handler = h.match(self, request) + if handler is not None: + break + else: + handler = exc.HTTPNotFound + + # add navigation links to handler [example] + if hasattr(handler, 'data'): + handler.data.setdefault('links', []) + for h in self.handlers: + handler.data['links'].append((handler.link(h.handler_path), + h.__name__)) + + # get response + res = handler() + return res(environ, start_response)