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#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
#
module Thrift
class BinaryProtocol < BaseProtocol
VERSION_MASK = 0xffff0000
VERSION_1 = 0x80010000
TYPE_MASK = 0x000000ff
attr_reader :strict_read, :strict_write
def initialize(trans, strict_read=true, strict_write=true)
super(trans)
@strict_read = strict_read
@strict_write = strict_write
end
def write_message_begin(name, type, seqid)
# this is necessary because we added (needed) bounds checking to
# write_i32, and 0x80010000 is too big for that.
if strict_write
write_i16(VERSION_1 >> 16)
write_i16(type)
write_string(name)
write_i32(seqid)
else
write_string(name)
write_byte(type)
write_i32(seqid)
end
end
def write_struct_begin(name); nil; end
def write_field_begin(name, type, id)
write_byte(type)
write_i16(id)
end
def write_field_stop
write_byte(Thrift::Types::STOP)
end
def write_map_begin(ktype, vtype, size)
write_byte(ktype)
write_byte(vtype)
write_i32(size)
end
def write_list_begin(etype, size)
write_byte(etype)
write_i32(size)
end
def write_set_begin(etype, size)
write_byte(etype)
write_i32(size)
end
def write_bool(bool)
write_byte(bool ? 1 : 0)
end
def write_byte(byte)
raise RangeError if byte < -2**31 || byte >= 2**32
trans.write([byte].pack('c'))
end
def write_i16(i16)
trans.write([i16].pack('n'))
end
def write_i32(i32)
raise RangeError if i32 < -2**31 || i32 >= 2**31
trans.write([i32].pack('N'))
end
def write_i64(i64)
raise RangeError if i64 < -2**63 || i64 >= 2**64
hi = i64 >> 32
lo = i64 & 0xffffffff
trans.write([hi, lo].pack('N2'))
end
def write_double(dub)
trans.write([dub].pack('G'))
end
def write_string(str)
write_i32(str.length)
trans.write(str)
end
def read_message_begin
version = read_i32
if version < 0
if (version & VERSION_MASK != VERSION_1)
raise ProtocolException.new(ProtocolException::BAD_VERSION, 'Missing version identifier')
end
type = version & TYPE_MASK
name = read_string
seqid = read_i32
[name, type, seqid]
else
if strict_read
raise ProtocolException.new(ProtocolException::BAD_VERSION, 'No version identifier, old protocol client?')
end
name = trans.read_all(version)
type = read_byte
seqid = read_i32
[name, type, seqid]
end
end
def read_struct_begin; nil; end
def read_field_begin
type = read_byte
if (type == Types::STOP)
[nil, type, 0]
else
id = read_i16
[nil, type, id]
end
end
def read_map_begin
ktype = read_byte
vtype = read_byte
size = read_i32
[ktype, vtype, size]
end
def read_list_begin
etype = read_byte
size = read_i32
[etype, size]
end
def read_set_begin
etype = read_byte
size = read_i32
[etype, size]
end
def read_bool
byte = read_byte
byte != 0
end
def read_byte
dat = trans.read_all(1)
val = dat[0].ord
if (val > 0x7f)
val = 0 - ((val - 1) ^ 0xff)
end
val
end
def read_i16
dat = trans.read_all(2)
val, = dat.unpack('n')
if (val > 0x7fff)
val = 0 - ((val - 1) ^ 0xffff)
end
val
end
def read_i32
dat = trans.read_all(4)
val, = dat.unpack('N')
if (val > 0x7fffffff)
val = 0 - ((val - 1) ^ 0xffffffff)
end
val
end
def read_i64
dat = trans.read_all(8)
hi, lo = dat.unpack('N2')
if (hi > 0x7fffffff)
hi ^= 0xffffffff
lo ^= 0xffffffff
0 - (hi << 32) - lo - 1
else
(hi << 32) + lo
end
end
def read_double
dat = trans.read_all(8)
val = dat.unpack('G').first
val
end
def read_string
sz = read_i32
dat = trans.read_all(sz)
dat
end
end
class BinaryProtocolFactory < BaseProtocolFactory
def get_protocol(trans)
return Thrift::BinaryProtocol.new(trans)
end
end
end
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