def __call__(self, request):
"""Called by HTTPServer to execute the request."""
transforms = [t(request) for t in self.transforms]
handler = None
args = []
kwargs = {}
handlers = self._get_host_handlers(request)
if not handlers:
handler = RedirectHandler(
self, request, url="http://" + self.default_host + "/")
else:
for spec in handlers:
match = spec.regex.match(request.path)
if match:
handler = spec.handler_class(self, request, **spec.kwargs)
if spec.regex.groups:
# None-safe wrapper around url_unescape to handle
# unmatched optional groups correctly
def unquote(s):
if s is None:
return s
return escape.url_unescape(s, encoding=None)
# Pass matched groups to the handler. Since
# match.groups() includes both named and unnamed groups,
# we want to use either groups or groupdict but not both.
# Note that args are passed as bytes so the handler can
# decide what encoding to use.
if spec.regex.groupindex:
kwargs = dict(
(str(k), unquote(v))
for (k, v) in match.groupdict().items())
else:
args = [unquote(s) for s in match.groups()]
break
if not handler:
handler = ErrorHandler(self, request, status_code=404)
# In debug mode, re-compile templates and reload static files on every
# request so you don't need to restart to see changes
if self.settings.get("debug"):
with RequestHandler._template_loader_lock:
for loader in RequestHandler._template_loaders.values():
loader.reset()
StaticFileHandler.reset()
handler._execute(transforms, *args, **kwargs)
return handler
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