def _encode_header_chunk(self, headers):
chunk = bytearray()
#first two bytes: number of pairs
#chunk.extend(len(headers).to_bytes(2, 'big'))
chunk.extend(struct.pack('>H', len(headers)))
#after that...
for name, value in sorted(headers.items()):
#name = bytes(name, 'UTF-8')
name = name.encode('UTF-8')
#value = bytes(value, 'UTF-8')
value = value.encode('UTF-8')
#two bytes: length of name
#chunk.extend(len(name).to_bytes(2, 'big'))
chunk.extend(struct.pack('>H', len(name)))
#next name_length bytes: name
chunk.extend(name)
#two bytes: length of value
#chunk.extend(len(value).to_bytes(2, 'big'))
chunk.extend(struct.pack('>H', len(value)))
#next value_length bytes: value
chunk.extend(value)
#return self.deflater.compress(bytes(chunk))
# print 'headers', sorted(headers.items())
# print 'decoded_headers', repr(chunk)
compressed_headers = compress(str(chunk), level=6, dictionary=HEADER_ZLIB_DICT_2)
# print 'compressed_headers', repr(compressed_headers)
return compressed_headers[:-1] # Don't know why -1
def asBinary(self, compressed=True):
hdr_tuples = []
for name, values in self._rawHeaders.items():
hdr_tuples.extend([(name, value,) for value in values])
hdr_tuples.sort()
fmt = ["!H"]
args = [len(hdr_tuples)]
for n, v in hdr_tuples:
# TODO: check for overflowing n, v lengths
fmt.append("H%dsH%ds" % (len(n), len(v)))
args.extend([len(n), n, len(v), v])
hdrs = struct.pack("".join(fmt), *args)
if compressed:
return compress(hdrs, dictionary=dictionary)
return hdrs
