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# -*- coding: utf-8 -*-
from __future__ import absolute_import
import struct
from ..thrift import TType
from .exc import TProtocolException
# VERSION_MASK = 0xffff0000
VERSION_MASK = -65536
# VERSION_1 = 0x80010000
VERSION_1 = -2147418112
TYPE_MASK = 0x000000ff
def pack_i8(byte):
return struct.pack("!b", byte)
def pack_i16(i16):
return struct.pack("!h", i16)
def pack_i32(i32):
return struct.pack("!i", i32)
def pack_i64(i64):
return struct.pack("!q", i64)
def pack_double(dub):
return struct.pack("!d", dub)
def pack_string(string):
return struct.pack("!i%ds" % len(string), len(string), string)
def unpack_i8(buf):
return struct.unpack("!b", buf)[0]
def unpack_i16(buf):
return struct.unpack("!h", buf)[0]
def unpack_i32(buf):
return struct.unpack("!i", buf)[0]
def unpack_i64(buf):
return struct.unpack("!q", buf)[0]
def unpack_double(buf):
return struct.unpack("!d", buf)[0]
def write_message_begin(outbuf, name, ttype, seqid, strict=True):
if strict:
outbuf.write(pack_i32(VERSION_1 | ttype))
outbuf.write(pack_string(name.encode('utf-8')))
else:
outbuf.write(pack_string(name.encode('utf-8')))
outbuf.write(pack_i8(ttype))
outbuf.write(pack_i32(seqid))
def write_field_begin(outbuf, ttype, fid):
outbuf.write(pack_i8(ttype) + pack_i16(fid))
def write_field_stop(outbuf):
outbuf.write(pack_i8(TType.STOP))
def write_list_begin(outbuf, etype, size):
outbuf.write(pack_i8(etype) + pack_i32(size))
def write_map_begin(outbuf, ktype, vtype, size):
outbuf.write(pack_i8(ktype) + pack_i8(vtype) + pack_i32(size))
def write_val(outbuf, ttype, val, spec=None):
if ttype == TType.BOOL:
if val:
outbuf.write(pack_i8(1))
else:
outbuf.write(pack_i8(0))
elif ttype == TType.BYTE:
outbuf.write(pack_i8(val))
elif ttype == TType.I16:
outbuf.write(pack_i16(val))
elif ttype == TType.I32:
outbuf.write(pack_i32(val))
elif ttype == TType.I64:
outbuf.write(pack_i64(val))
elif ttype == TType.DOUBLE:
outbuf.write(pack_double(val))
elif ttype == TType.STRING:
if not isinstance(val, bytes):
val = val.encode('utf-8')
outbuf.write(pack_string(val))
elif ttype == TType.SET or ttype == TType.LIST:
if isinstance(spec, tuple):
e_type, t_spec = spec[0], spec[1]
else:
e_type, t_spec = spec, None
val_len = len(val)
write_list_begin(outbuf, e_type, val_len)
for e_val in val:
write_val(outbuf, e_type, e_val, t_spec)
elif ttype == TType.MAP:
if isinstance(spec[0], int):
k_type = spec[0]
k_spec = None
else:
k_type, k_spec = spec[0]
if isinstance(spec[1], int):
v_type = spec[1]
v_spec = None
else:
v_type, v_spec = spec[1]
write_map_begin(outbuf, k_type, v_type, len(val))
for k in iter(val):
write_val(outbuf, k_type, k, k_spec)
write_val(outbuf, v_type, val[k], v_spec)
elif ttype == TType.STRUCT:
for fid in iter(val.thrift_spec):
f_spec = val.thrift_spec[fid]
if len(f_spec) == 3:
f_type, f_name, f_req = f_spec
f_container_spec = None
else:
f_type, f_name, f_container_spec, f_req = f_spec
v = getattr(val, f_name)
if v is None:
continue
write_field_begin(outbuf, f_type, fid)
write_val(outbuf, f_type, v, f_container_spec)
write_field_stop(outbuf)
def read_message_begin(inbuf, strict=True):
sz = unpack_i32(inbuf.read(4))
if sz < 0:
version = sz & VERSION_MASK
if version != VERSION_1:
raise TProtocolException(
type=TProtocolException.BAD_VERSION,
message='Bad version in read_message_begin: %d' % (sz))
name_sz = unpack_i32(inbuf.read(4))
name = inbuf.read(name_sz).decode('utf-8')
type_ = sz & TYPE_MASK
else:
if strict:
raise TProtocolException(type=TProtocolException.BAD_VERSION,
message='No protocol version header')
name = inbuf.read(sz).decode('utf-8')
type_ = unpack_i8(inbuf.read(1))
seqid = unpack_i32(inbuf.read(4))
return name, type_, seqid
def read_field_begin(inbuf):
f_type = unpack_i8(inbuf.read(1))
if f_type == TType.STOP:
return f_type, 0
return f_type, unpack_i16(inbuf.read(2))
def read_list_begin(inbuf):
e_type = unpack_i8(inbuf.read(1))
sz = unpack_i32(inbuf.read(4))
return e_type, sz
def read_map_begin(inbuf):
k_type, v_type = unpack_i8(inbuf.read(1)), unpack_i8(inbuf.read(1))
sz = unpack_i32(inbuf.read(4))
return k_type, v_type, sz
def read_val(inbuf, ttype, spec=None, decode_response=True):
if ttype == TType.BOOL:
return bool(unpack_i8(inbuf.read(1)))
elif ttype == TType.BYTE:
return unpack_i8(inbuf.read(1))
elif ttype == TType.I16:
return unpack_i16(inbuf.read(2))
elif ttype == TType.I32:
return unpack_i32(inbuf.read(4))
elif ttype == TType.I64:
return unpack_i64(inbuf.read(8))
elif ttype == TType.DOUBLE:
return unpack_double(inbuf.read(8))
elif ttype == TType.STRING:
sz = unpack_i32(inbuf.read(4))
byte_payload = inbuf.read(sz)
# Since we cannot tell if we're getting STRING or BINARY
# if not asked not to decode, try both
if decode_response:
try:
return byte_payload.decode('utf-8')
except UnicodeDecodeError:
pass
return byte_payload
elif ttype == TType.SET or ttype == TType.LIST:
if isinstance(spec, tuple):
v_type, v_spec = spec[0], spec[1]
else:
v_type, v_spec = spec, None
result = []
r_type, sz = read_list_begin(inbuf)
# the v_type is useless here since we already get it from spec
if r_type != v_type:
for _ in range(sz):
skip(inbuf, r_type)
return []
for i in range(sz):
result.append(read_val(inbuf, v_type, v_spec, decode_response))
return result
elif ttype == TType.MAP:
if isinstance(spec[0], int):
k_type = spec[0]
k_spec = None
else:
k_type, k_spec = spec[0]
if isinstance(spec[1], int):
v_type = spec[1]
v_spec = None
else:
v_type, v_spec = spec[1]
result = {}
sk_type, sv_type, sz = read_map_begin(inbuf)
if sk_type != k_type or sv_type != v_type:
for _ in range(sz):
skip(inbuf, sk_type)
skip(inbuf, sv_type)
return {}
for i in range(sz):
k_val = read_val(inbuf, k_type, k_spec, decode_response)
v_val = read_val(inbuf, v_type, v_spec, decode_response)
result[k_val] = v_val
return result
elif ttype == TType.STRUCT:
obj = spec()
read_struct(inbuf, obj, decode_response)
return obj
def read_struct(inbuf, obj, decode_response=True):
while True:
f_type, fid = read_field_begin(inbuf)
if f_type == TType.STOP:
break
if fid not in obj.thrift_spec:
skip(inbuf, f_type)
continue
if len(obj.thrift_spec[fid]) == 3:
sf_type, f_name, f_req = obj.thrift_spec[fid]
f_container_spec = None
else:
sf_type, f_name, f_container_spec, f_req = obj.thrift_spec[fid]
# it really should equal here. but since we already wasted
# space storing the duplicate info, let's check it.
if f_type != sf_type:
skip(inbuf, f_type)
continue
setattr(obj, f_name,
read_val(inbuf, f_type, f_container_spec, decode_response))
def skip(inbuf, ftype):
if ftype == TType.BOOL or ftype == TType.BYTE:
inbuf.read(1)
elif ftype == TType.I16:
inbuf.read(2)
elif ftype == TType.I32:
inbuf.read(4)
elif ftype == TType.I64:
inbuf.read(8)
elif ftype == TType.DOUBLE:
inbuf.read(8)
elif ftype == TType.STRING:
inbuf.read(unpack_i32(inbuf.read(4)))
elif ftype == TType.SET or ftype == TType.LIST:
v_type, sz = read_list_begin(inbuf)
for i in range(sz):
skip(inbuf, v_type)
elif ftype == TType.MAP:
k_type, v_type, sz = read_map_begin(inbuf)
for i in range(sz):
skip(inbuf, k_type)
skip(inbuf, v_type)
elif ftype == TType.STRUCT:
while True:
f_type, fid = read_field_begin(inbuf)
if f_type == TType.STOP:
break
skip(inbuf, f_type)
class TBinaryProtocol(object):
"""Binary implementation of the Thrift protocol driver."""
def __init__(self, trans,
strict_read=True, strict_write=True,
decode_response=True):
self.trans = trans
self.strict_read = strict_read
self.strict_write = strict_write
self.decode_response = decode_response
def skip(self, ttype):
skip(self.trans, ttype)
def read_message_begin(self):
api, ttype, seqid = read_message_begin(
self.trans, strict=self.strict_read)
return api, ttype, seqid
def read_message_end(self):
pass
def write_message_begin(self, name, ttype, seqid):
write_message_begin(self.trans, name, ttype, seqid,
strict=self.strict_write)
def write_message_end(self):
pass
def read_struct(self, obj):
return read_struct(self.trans, obj, self.decode_response)
def write_struct(self, obj):
write_val(self.trans, TType.STRUCT, obj)
class TBinaryProtocolFactory(object):
def __init__(self, strict_read=True, strict_write=True,
decode_response=True):
self.strict_read = strict_read
self.strict_write = strict_write
self.decode_response = decode_response
def get_protocol(self, trans):
return TBinaryProtocol(trans,
self.strict_read, self.strict_write,
self.decode_response)
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