def __call__(self, request):
# Get the dispatchers for the request method.
dispatchers = self.request_dispatchers.get(request.method)
# No dispatchers for method, send 405 with list of allowed methods.
if dispatchers is None:
return http.method_not_allowed(", ".join(self.request_dispatchers))
# Look up the best dispatcher
dispatcher = _best_dispatcher(dispatchers, request)
if dispatcher is not None:
(callable, match) = dispatcher
response = callable(self, request)
# Try to autocomplete the content-type header if not set
# explicitly.
# If there's no accept from the client and there's only one
# possible type from the match then use that as the best match.
# Otherwise use mimeparse to work out what the best match was. If
# the best match if not a wildcard then we know what content-type
# should be.
if isinstance(response, http.Response) and not response.headers.get("content-type"):
accept = str(request.accept)
if not accept and len(match["accept"]) == 1:
best_match = match["accept"][0]
else:
best_match = mimeparse.best_match(match["accept"], accept)
if "*" not in best_match:
response.headers["content-type"] = best_match
return response
# No match, send 406
return http.not_acceptable([("Content-Type", "text/plain")], "406 Not Acceptable")
def _filter_dispatchers_on_accept(dispatchers, request):
# Build an ordered list of the supported types.
supported = []
for d in dispatchers:
supported.extend(d[1]["accept"])
# Find the best accept type
best_match = mimeparse.best_match(supported, str(request.accept))
# Return the matching dispatchers
return [d for d in dispatchers if best_match in d[1]["accept"]]
def _filter_dispatchers_on_content_type(dispatchers, request):
# Build an ordered list of the supported types.
supported = []
for d in dispatchers:
supported.extend(d[1]["content_type"])
# Find the best type.
best_match = mimeparse.best_match(supported, str(request.headers["content-type"]))
# Return the matching dispatchers
return [d for d in dispatchers if best_match in d[1]["content_type"]]
