This file is indexed.

/usr/lib/python2.7/dist-packages/waitress/receiver.py is in python-waitress 0.8.9-2.

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