Spaces:
Runtime error
Runtime error
File size: 6,096 Bytes
0c87db7 |
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 |
"""Download files with progress indicators.
"""
import email.message
import logging
import mimetypes
import os
from typing import Iterable, Optional, Tuple
from pip._vendor.requests.models import CONTENT_CHUNK_SIZE, Response
from pip._internal.cli.progress_bars import get_download_progress_renderer
from pip._internal.exceptions import NetworkConnectionError
from pip._internal.models.index import PyPI
from pip._internal.models.link import Link
from pip._internal.network.cache import is_from_cache
from pip._internal.network.session import PipSession
from pip._internal.network.utils import HEADERS, raise_for_status, response_chunks
from pip._internal.utils.misc import format_size, redact_auth_from_url, splitext
logger = logging.getLogger(__name__)
def _get_http_response_size(resp: Response) -> Optional[int]:
try:
return int(resp.headers["content-length"])
except (ValueError, KeyError, TypeError):
return None
def _prepare_download(
resp: Response,
link: Link,
progress_bar: str,
) -> Iterable[bytes]:
total_length = _get_http_response_size(resp)
if link.netloc == PyPI.file_storage_domain:
url = link.show_url
else:
url = link.url_without_fragment
logged_url = redact_auth_from_url(url)
if total_length:
logged_url = "{} ({})".format(logged_url, format_size(total_length))
if is_from_cache(resp):
logger.info("Using cached %s", logged_url)
else:
logger.info("Downloading %s", logged_url)
if logger.getEffectiveLevel() > logging.INFO:
show_progress = False
elif is_from_cache(resp):
show_progress = False
elif not total_length:
show_progress = True
elif total_length > (40 * 1000):
show_progress = True
else:
show_progress = False
chunks = response_chunks(resp, CONTENT_CHUNK_SIZE)
if not show_progress:
return chunks
renderer = get_download_progress_renderer(bar_type=progress_bar, size=total_length)
return renderer(chunks)
def sanitize_content_filename(filename: str) -> str:
"""
Sanitize the "filename" value from a Content-Disposition header.
"""
return os.path.basename(filename)
def parse_content_disposition(content_disposition: str, default_filename: str) -> str:
"""
Parse the "filename" value from a Content-Disposition header, and
return the default filename if the result is empty.
"""
m = email.message.Message()
m["content-type"] = content_disposition
filename = m.get_param("filename")
if filename:
# We need to sanitize the filename to prevent directory traversal
# in case the filename contains ".." path parts.
filename = sanitize_content_filename(str(filename))
return filename or default_filename
def _get_http_response_filename(resp: Response, link: Link) -> str:
"""Get an ideal filename from the given HTTP response, falling back to
the link filename if not provided.
"""
filename = link.filename # fallback
# Have a look at the Content-Disposition header for a better guess
content_disposition = resp.headers.get("content-disposition")
if content_disposition:
filename = parse_content_disposition(content_disposition, filename)
ext: Optional[str] = splitext(filename)[1]
if not ext:
ext = mimetypes.guess_extension(resp.headers.get("content-type", ""))
if ext:
filename += ext
if not ext and link.url != resp.url:
ext = os.path.splitext(resp.url)[1]
if ext:
filename += ext
return filename
def _http_get_download(session: PipSession, link: Link) -> Response:
target_url = link.url.split("#", 1)[0]
resp = session.get(target_url, headers=HEADERS, stream=True)
raise_for_status(resp)
return resp
class Downloader:
def __init__(
self,
session: PipSession,
progress_bar: str,
) -> None:
self._session = session
self._progress_bar = progress_bar
def __call__(self, link: Link, location: str) -> Tuple[str, str]:
"""Download the file given by link into location."""
try:
resp = _http_get_download(self._session, link)
except NetworkConnectionError as e:
assert e.response is not None
logger.critical(
"HTTP error %s while getting %s", e.response.status_code, link
)
raise
filename = _get_http_response_filename(resp, link)
filepath = os.path.join(location, filename)
chunks = _prepare_download(resp, link, self._progress_bar)
with open(filepath, "wb") as content_file:
for chunk in chunks:
content_file.write(chunk)
content_type = resp.headers.get("Content-Type", "")
return filepath, content_type
class BatchDownloader:
def __init__(
self,
session: PipSession,
progress_bar: str,
) -> None:
self._session = session
self._progress_bar = progress_bar
def __call__(
self, links: Iterable[Link], location: str
) -> Iterable[Tuple[Link, Tuple[str, str]]]:
"""Download the files given by links into location."""
for link in links:
try:
resp = _http_get_download(self._session, link)
except NetworkConnectionError as e:
assert e.response is not None
logger.critical(
"HTTP error %s while getting %s",
e.response.status_code,
link,
)
raise
filename = _get_http_response_filename(resp, link)
filepath = os.path.join(location, filename)
chunks = _prepare_download(resp, link, self._progress_bar)
with open(filepath, "wb") as content_file:
for chunk in chunks:
content_file.write(chunk)
content_type = resp.headers.get("Content-Type", "")
yield link, (filepath, content_type)
|