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annotate planemo/lib/python3.7/site-packages/urllib3/packages/backports/makefile.py @ 1:56ad4e20f292 draft

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"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
author guerler
date Fri, 31 Jul 2020 00:32:28 -0400
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1 # -*- coding: utf-8 -*-
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2 """
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3 backports.makefile
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4 ~~~~~~~~~~~~~~~~~~
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5
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6 Backports the Python 3 ``socket.makefile`` method for use with anything that
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7 wants to create a "fake" socket object.
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8 """
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9 import io
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10
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11 from socket import SocketIO
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12
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13
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14 def backport_makefile(
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15 self, mode="r", buffering=None, encoding=None, errors=None, newline=None
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16 ):
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17 """
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18 Backport of ``socket.makefile`` from Python 3.5.
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19 """
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20 if not set(mode) <= {"r", "w", "b"}:
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21 raise ValueError("invalid mode %r (only r, w, b allowed)" % (mode,))
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22 writing = "w" in mode
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23 reading = "r" in mode or not writing
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24 assert reading or writing
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25 binary = "b" in mode
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26 rawmode = ""
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27 if reading:
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28 rawmode += "r"
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29 if writing:
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30 rawmode += "w"
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31 raw = SocketIO(self, rawmode)
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32 self._makefile_refs += 1
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33 if buffering is None:
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34 buffering = -1
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35 if buffering < 0:
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36 buffering = io.DEFAULT_BUFFER_SIZE
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37 if buffering == 0:
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38 if not binary:
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39 raise ValueError("unbuffered streams must be binary")
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40 return raw
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41 if reading and writing:
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42 buffer = io.BufferedRWPair(raw, raw, buffering)
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43 elif reading:
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44 buffer = io.BufferedReader(raw, buffering)
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45 else:
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46 assert writing
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47 buffer = io.BufferedWriter(raw, buffering)
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48 if binary:
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49 return buffer
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50 text = io.TextIOWrapper(buffer, encoding, errors, newline)
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51 text.mode = mode
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52 return text