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annotate lib/python3.8/site-packages/pip/_internal/network/utils.py @ 0:9e54283cc701 draft

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"planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
author guerler
date Mon, 27 Jul 2020 03:47:31 -0400
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9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
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1 from pip._vendor.requests.models import CONTENT_CHUNK_SIZE, Response
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2
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3 from pip._internal.utils.typing import MYPY_CHECK_RUNNING
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4
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5 if MYPY_CHECK_RUNNING:
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6 from typing import Iterator
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7
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8
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9 def response_chunks(response, chunk_size=CONTENT_CHUNK_SIZE):
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10 # type: (Response, int) -> Iterator[bytes]
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11 """Given a requests Response, provide the data chunks.
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12 """
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13 try:
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14 # Special case for urllib3.
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15 for chunk in response.raw.stream(
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16 chunk_size,
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17 # We use decode_content=False here because we don't
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18 # want urllib3 to mess with the raw bytes we get
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19 # from the server. If we decompress inside of
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20 # urllib3 then we cannot verify the checksum
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21 # because the checksum will be of the compressed
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22 # file. This breakage will only occur if the
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23 # server adds a Content-Encoding header, which
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24 # depends on how the server was configured:
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25 # - Some servers will notice that the file isn't a
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26 # compressible file and will leave the file alone
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27 # and with an empty Content-Encoding
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28 # - Some servers will notice that the file is
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29 # already compressed and will leave the file
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30 # alone and will add a Content-Encoding: gzip
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31 # header
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32 # - Some servers won't notice anything at all and
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33 # will take a file that's already been compressed
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34 # and compress it again and set the
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35 # Content-Encoding: gzip header
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36 #
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37 # By setting this not to decode automatically we
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38 # hope to eliminate problems with the second case.
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39 decode_content=False,
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40 ):
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41 yield chunk
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42 except AttributeError:
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43 # Standard file-like object.
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44 while True:
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45 chunk = response.raw.read(chunk_size)
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46 if not chunk:
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47 break
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48 yield chunk