def negotiate_encoder(encoders, accept=None):
"""
Given the value of a 'Accept' header, return the appropriate codec for
encoding the response content.
"""
if accept is None:
return encoders[0]
acceptable = set(
[item.split(';')[0].strip().lower() for item in accept.split(',')])
for codec in encoders:
for media_type in codec.get_media_types():
if media_type in acceptable:
return codec
for codec in encoders:
for media_type in codec.get_media_types():
if codec.media_type.split('/')[0] + '/*' in acceptable:
return codec
if '*/*' in acceptable:
return encoders[0]
msg = "Unsupported media in Accept header '%s'" % accept
raise exceptions.NoCodecAvailable(msg)
def negotiate_decoder(decoders, content_type=None):
"""
Given the value of a 'Content-Type' header, return the appropriate
codec for decoding the request content.
"""
if content_type is None:
return decoders[0]
content_type = content_type.split(';')[0].strip().lower()
main_type = content_type.split('/')[0] + '/*'
wildcard_type = '*/*'
for codec in decoders:
for media_type in codec.get_media_types():
if media_type in (content_type, main_type, wildcard_type):
return codec
msg = "Unsupported media in Content-Type header '%s'" % content_type
raise exceptions.NoCodecAvailable(msg)
