/usr/lib/python2.7/dist-packages/waitress/receiver.py is in python-waitress 0.8.8-1ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 | ##############################################################################
#
# Copyright (c) 2001, 2002 Zope Foundation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""Data Chunk Receiver
"""
from waitress.utilities import find_double_newline
from waitress.utilities import BadRequest
class FixedStreamReceiver(object):
# See IStreamConsumer
completed = False
error = None
def __init__(self, cl, buf):
self.remain = cl
self.buf = buf
def __len__(self):
return self.buf.__len__()
def received(self, data):
'See IStreamConsumer'
rm = self.remain
if rm < 1:
self.completed = True # Avoid any chance of spinning
return 0
datalen = len(data)
if rm <= datalen:
self.buf.append(data[:rm])
self.remain = 0
self.completed = True
return rm
else:
self.buf.append(data)
self.remain -= datalen
return datalen
def getfile(self):
return self.buf.getfile()
def getbuf(self):
return self.buf
class ChunkedReceiver(object):
chunk_remainder = 0
control_line = b''
all_chunks_received = False
trailer = b''
completed = False
error = None
# max_control_line = 1024
# max_trailer = 65536
def __init__(self, buf):
self.buf = buf
def __len__(self):
return self.buf.__len__()
def received(self, s):
# Returns the number of bytes consumed.
if self.completed:
return 0
orig_size = len(s)
while s:
rm = self.chunk_remainder
if rm > 0:
# Receive the remainder of a chunk.
to_write = s[:rm]
self.buf.append(to_write)
written = len(to_write)
s = s[written:]
self.chunk_remainder -= written
elif not self.all_chunks_received:
# Receive a control line.
s = self.control_line + s
pos = s.find(b'\n')
if pos < 0:
# Control line not finished.
self.control_line = s
s = ''
else:
# Control line finished.
line = s[:pos]
s = s[pos + 1:]
self.control_line = b''
line = line.strip()
if line:
# Begin a new chunk.
semi = line.find(b';')
if semi >= 0:
# discard extension info.
line = line[:semi]
try:
sz = int(line.strip(), 16) # hexadecimal
except ValueError: # garbage in input
self.error = BadRequest(
'garbage in chunked encoding input')
sz = 0
if sz > 0:
# Start a new chunk.
self.chunk_remainder = sz
else:
# Finished chunks.
self.all_chunks_received = True
# else expect a control line.
else:
# Receive the trailer.
trailer = self.trailer + s
if trailer.startswith(b'\r\n'):
# No trailer.
self.completed = True
return orig_size - (len(trailer) - 2)
elif trailer.startswith(b'\n'):
# No trailer.
self.completed = True
return orig_size - (len(trailer) - 1)
pos = find_double_newline(trailer)
if pos < 0:
# Trailer not finished.
self.trailer = trailer
s = b''
else:
# Finished the trailer.
self.completed = True
self.trailer = trailer[:pos]
return orig_size - (len(trailer) - pos)
return orig_size
def getfile(self):
return self.buf.getfile()
def getbuf(self):
return self.buf
|