def extract_ct_body(params: Dict[str, List[str]]) -> Tuple[str, bytes]:
""" Extract the content type and body from a list of get parameters.
:param params: A dictionary of key/value of parameters as provided by
urllib.parse.parse_qs
:return: a tuple that contains a string and bytes, respectively ct and
body.
:raises: a DOHParamsException with an explanatory message.
"""
if constants.DOH_CONTENT_TYPE_PARAM in params and \
len(params[constants.DOH_CONTENT_TYPE_PARAM]):
ct = params[constants.DOH_CONTENT_TYPE_PARAM][0]
if not ct:
# An empty value indicates the default
# application/dns-udpwireformat type
ct = constants.DOH_MEDIA_TYPE
else:
raise server_protocol.DOHParamsException(
b'Missing Content Type Parameter')
if constants.DOH_DNS_PARAM in params and \
len(params[constants.DOH_DNS_PARAM]):
try:
body = doh_b64_decode(params[constants.DOH_DNS_PARAM][0])
except binascii.Error:
raise server_protocol.DOHParamsException(b'Invalid Body Parameter')
if not body:
raise server_protocol.DOHParamsException(b'Missing Body')
else:
raise server_protocol.DOHParamsException(b'Missing Body Parameter')
return ct, body
def extract_ct_body(params: Dict[str, List[str]]) -> Tuple[str, bytes]:
""" Extract the content type and body from a list of get parameters.
:param params: A dictionary of key/value of parameters as provided by
urllib.parse.parse_qs
:return: a tuple that contains a string and bytes, respectively ct and
body.
:raises: a DOHParamsException with an explanatory message.
"""
ct = constants.DOH_MEDIA_TYPE
if constants.DOH_DNS_PARAM in params and len(
params[constants.DOH_DNS_PARAM]):
try:
body = doh_b64_decode(params[constants.DOH_DNS_PARAM][0])
except binascii.Error:
raise server_protocol.DOHParamsException(b"Invalid Body Parameter")
if not body:
raise server_protocol.DOHParamsException(b"Missing Body")
else:
raise server_protocol.DOHParamsException(b"Missing Body Parameter")
return ct, body