def test_single(self):
"""
A single ``Accept`` value is parsed into its content type with no
parameters.
"""
self.assertThat(
_parseAccept(['text/plain']).items(),
Equals([('text/plain', {})]))
def test_multiple(self):
"""
Multiple ``Accept`` values are split on comma each with no
parameters.
"""
self.assertThat(
_parseAccept(['text/plain', 'text/html,text/csv']).items(),
Equals([('text/plain', {}),
('text/html', {}),
('text/csv', {})]))
def test_q(self):
"""
Content types are sorted in descending order by their ``q`` parameter,
the absence of a ``q`` parameter indicates a value of ``1.0``.
"""
self.assertThat(
_parseAccept(['text/plain;q=0.2',
'text/html,text/csv;q=0.4']).items(),
Equals([('text/html', {}),
('text/csv', {'q': '0.4'}),
('text/plain', {'q': '0.2'})]))
def _negotiateHandler(self, request):
"""
Negotiate a handler based on the content types acceptable to the
client.
:rtype: 2-`tuple` of `twisted.web.iweb.IResource` and `bytes`
:return: Pair of a resource and the content type.
"""
accept = _parseAccept(request.requestHeaders.getRawHeaders('Accept'))
for contentType in accept.keys():
handler = self._acceptHandlers.get(contentType.lower())
if handler is not None:
return handler, handler.contentType
if self._fallback:
handler = self._handlers[0]
return handler, handler.contentType
return NotAcceptable(), None
