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-rw-r--r--trunk/qpid/python/qpid/framing.py310
1 files changed, 0 insertions, 310 deletions
diff --git a/trunk/qpid/python/qpid/framing.py b/trunk/qpid/python/qpid/framing.py
deleted file mode 100644
index 0a8f26272c..0000000000
--- a/trunk/qpid/python/qpid/framing.py
+++ /dev/null
@@ -1,310 +0,0 @@
-#
-# 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.
-#
-
-import struct
-
-FIRST_SEG = 0x08
-LAST_SEG = 0x04
-FIRST_FRM = 0x02
-LAST_FRM = 0x01
-
-class Frame:
-
- HEADER = "!2BHxBH4x"
- HEADER_SIZE = struct.calcsize(HEADER)
- MAX_PAYLOAD = 65535 - struct.calcsize(HEADER)
-
- def __init__(self, flags, type, track, channel, payload):
- if len(payload) > Frame.MAX_PAYLOAD:
- raise ValueError("max payload size exceeded: %s" % len(payload))
- self.flags = flags
- self.type = type
- self.track = track
- self.channel = channel
- self.payload = payload
-
- def isFirstSegment(self):
- return bool(FIRST_SEG & self.flags)
-
- def isLastSegment(self):
- return bool(LAST_SEG & self.flags)
-
- def isFirstFrame(self):
- return bool(FIRST_FRM & self.flags)
-
- def isLastFrame(self):
- return bool(LAST_FRM & self.flags)
-
- def __repr__(self):
- return "%s%s%s%s %s %s %s %r" % (int(self.isFirstSegment()),
- int(self.isLastSegment()),
- int(self.isFirstFrame()),
- int(self.isLastFrame()),
- self.type,
- self.track,
- self.channel,
- self.payload)
-
-class Segment:
-
- def __init__(self, first, last, type, track, channel, payload):
- self.id = None
- self.offset = None
- self.first = first
- self.last = last
- self.type = type
- self.track = track
- self.channel = channel
- self.payload = payload
-
- def __repr__(self):
- return "%s%s %s %s %s %r" % (int(self.first), int(self.last), self.type,
- self.track, self.channel, self.payload)
-
-class FrameDecoder:
-
- def __init__(self):
- self.input = ""
- self.output = []
- self.parse = self.__frame_header
-
- def write(self, bytes):
- self.input += bytes
- while True:
- next = self.parse()
- if next is None:
- break
- else:
- self.parse = next
-
- def __consume(self, n):
- result = self.input[:n]
- self.input = self.input[n:]
- return result
-
- def __frame_header(self):
- if len(self.input) >= Frame.HEADER_SIZE:
- st = self.__consume(Frame.HEADER_SIZE)
- self.flags, self.type, self.size, self.track, self.channel = \
- struct.unpack(Frame.HEADER, st)
- return self.__frame_body
-
- def __frame_body(self):
- size = self.size - Frame.HEADER_SIZE
- if len(self.input) >= size:
- payload = self.__consume(size)
- frame = Frame(self.flags, self.type, self.track, self.channel, payload)
- self.output.append(frame)
- return self.__frame_header
-
- def read(self):
- result = self.output
- self.output = []
- return result
-
-class FrameEncoder:
-
- def __init__(self):
- self.output = ""
-
- def write(self, *frames):
- for frame in frames:
- size = len(frame.payload) + Frame.HEADER_SIZE
- track = frame.track & 0x0F
- self.output += struct.pack(Frame.HEADER, frame.flags, frame.type, size,
- track, frame.channel)
- self.output += frame.payload
-
- def read(self):
- result = self.output
- self.output = ""
- return result
-
-class SegmentDecoder:
-
- def __init__(self):
- self.fragments = {}
- self.segments = []
-
- def write(self, *frames):
- for frm in frames:
- key = (frm.channel, frm.track)
- seg = self.fragments.get(key)
-
- if seg == None:
- seg = Segment(frm.isFirstSegment(), frm.isLastSegment(),
- frm.type, frm.track, frm.channel, "")
- self.fragments[key] = seg
-
- seg.payload += frm.payload
-
- if frm.isLastFrame():
- self.fragments.pop(key)
- self.segments.append(seg)
-
- def read(self):
- result = self.segments
- self.segments = []
- return result
-
-class SegmentEncoder:
-
- def __init__(self, max_payload=Frame.MAX_PAYLOAD):
- self.max_payload = max_payload
- self.frames = []
-
- def write(self, *segments):
- for seg in segments:
- remaining = seg.payload
-
- first = True
- while first or remaining:
- payload = remaining[:self.max_payload]
- remaining = remaining[self.max_payload:]
-
- flags = 0
- if first:
- flags |= FIRST_FRM
- first = False
- if not remaining:
- flags |= LAST_FRM
- if seg.first:
- flags |= FIRST_SEG
- if seg.last:
- flags |= LAST_SEG
-
- frm = Frame(flags, seg.type, seg.track, seg.channel, payload)
- self.frames.append(frm)
-
- def read(self):
- result = self.frames
- self.frames = []
- return result
-
-from ops import COMMANDS, CONTROLS, COMPOUND, Header, segment_type, track
-from spec import SPEC
-
-from codec010 import StringCodec
-
-class OpEncoder:
-
- def __init__(self):
- self.segments = []
-
- def write(self, *ops):
- for op in ops:
- if COMMANDS.has_key(op.NAME):
- seg_type = segment_type.command
- seg_track = track.command
- enc = self.encode_command(op)
- elif CONTROLS.has_key(op.NAME):
- seg_type = segment_type.control
- seg_track = track.control
- enc = self.encode_compound(op)
- else:
- raise ValueError(op)
- seg = Segment(True, False, seg_type, seg_track, op.channel, enc)
- self.segments.append(seg)
- if hasattr(op, "headers") and op.headers is not None:
- hdrs = ""
- for h in op.headers:
- hdrs += self.encode_compound(h)
- seg = Segment(False, False, segment_type.header, seg_track, op.channel,
- hdrs)
- self.segments.append(seg)
- if hasattr(op, "payload") and op.payload is not None:
- self.segments.append(Segment(False, False, segment_type.body, seg_track,
- op.channel, op.payload))
- self.segments[-1].last = True
-
- def encode_command(self, cmd):
- sc = StringCodec()
- sc.write_uint16(cmd.CODE)
- sc.write_compound(Header(sync=cmd.sync))
- sc.write_fields(cmd)
- return sc.encoded
-
- def encode_compound(self, op):
- sc = StringCodec()
- sc.write_compound(op)
- return sc.encoded
-
- def read(self):
- result = self.segments
- self.segments = []
- return result
-
-class OpDecoder:
-
- def __init__(self):
- self.op = None
- self.ops = []
-
- def write(self, *segments):
- for seg in segments:
- if seg.first:
- if seg.type == segment_type.command:
- self.op = self.decode_command(seg.payload)
- elif seg.type == segment_type.control:
- self.op = self.decode_control(seg.payload)
- else:
- raise ValueError(seg)
- self.op.channel = seg.channel
- elif seg.type == segment_type.header:
- if self.op.headers is None:
- self.op.headers = []
- self.op.headers.extend(self.decode_headers(seg.payload))
- elif seg.type == segment_type.body:
- if self.op.payload is None:
- self.op.payload = seg.payload
- else:
- self.op.payload += seg.payload
- if seg.last:
- self.ops.append(self.op)
- self.op = None
-
- def decode_command(self, encoded):
- sc = StringCodec(encoded)
- code = sc.read_uint16()
- cls = COMMANDS[code]
- hdr = sc.read_compound(Header)
- cmd = cls()
- sc.read_fields(cmd)
- cmd.sync = hdr.sync
- return cmd
-
- def decode_control(self, encoded):
- sc = StringCodec(encoded)
- code = sc.read_uint16()
- cls = CONTROLS[code]
- ctl = cls()
- sc.read_fields(ctl)
- return ctl
-
- def decode_headers(self, encoded):
- sc = StringCodec(encoded)
- result = []
- while sc.encoded:
- result.append(sc.read_struct32())
- return result
-
- def read(self):
- result = self.ops
- self.ops = []
- return result
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