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download.py

"""Download files with progress indicators.
"""
import cgi
import logging
import mimetypes
import os

from pip._vendor.requests.models import CONTENT_CHUNK_SIZE

from pip._internal.cli.progress_bars import DownloadProgressProvider
from pip._internal.exceptions import NetworkConnectionError
from pip._internal.models.index import PyPI
from pip._internal.network.cache import is_from_cache
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,
)
from pip._internal.utils.typing import MYPY_CHECK_RUNNING

if MYPY_CHECK_RUNNING:
    from typing import Iterable, Optional

from pip._vendor.requests.models import Response

from pip._internal.models.link import Link
    from pip._internal.network.session import PipSession

logger = logging.getLogger(__name__)

def _get_http_response_size(resp):
    # type: (Response) -> Optional[int]
    try:
        return int(resp.headers['content-length'])
    except (ValueError, KeyError, TypeError):
        return None

def _prepare_download(
    resp,  # type: Response
    link,  # type: Link
    progress_bar  # type: str
):
    # type: (...) -> 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

return DownloadProgressProvider(
        progress_bar, max=total_length
    )(chunks)

def sanitize_content_filename(filename):
    # type: (str) -> str
    """
    Sanitize the "filename" value from a Content-Disposition header.
    """
    return os.path.basename(filename)

def parse_content_disposition(content_disposition, default_filename):
    # type: (str, str) -> str
    """
    Parse the "filename" value from a Content-Disposition header, and
    return the default filename if the result is empty.
    """
    _type, params = cgi.parse_header(content_disposition)
    filename = params.get('filename')
    if filename:
        # We need to sanitize the filename to prevent directory traversal
        # in case the filename contains ".." path parts.
        filename = sanitize_content_filename(filename)
    return filename or default_filename

def _get_http_response_filename(resp, link):
    # type: (Response, 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 = splitext(filename)[1]  # type: Optional[str]
    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, link):
    # type: (PipSession, 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 Download(object):
    def __init__(
        self,
        response,  # type: Response
        filename,  # type: str
        chunks,  # type: Iterable[bytes]
    ):
        # type: (...) -> None
        self.response = response
        self.filename = filename
        self.chunks = chunks

class Downloader(object):
    def __init__(
        self,
        session,  # type: PipSession
        progress_bar,  # type: str
    ):
        # type: (...) -> None
        self._session = session
        self._progress_bar = progress_bar

def __call__(self, link):
        # type: (Link) -> Download
        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

return Download(
            resp,
            _get_http_response_filename(resp, link),
            _prepare_download(resp, link, self._progress_bar),
        )

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/linksafe	drwxr-xr-x	2024-07-05 06:23:08
..	dir	-	root/linksafe	drwxr-xr-x	2024-07-05 06:23:08
__pycache__	dir	-	root/linksafe	drwxr-xr-x	2024-07-05 06:23:08
__init__.py	text/plain	50 B	root/linksafe	-rw-r--r--	2023-11-13 09:35:51
auth.py	text/plain	11.38 KB	root/linksafe	-rw-r--r--	2023-11-13 09:35:51
cache.py	text/plain	2.27 KB	root/linksafe	-rw-r--r--	2023-11-13 09:35:51
download.py	text/plain	5.03 KB	root/linksafe	-rw-r--r--	2023-11-13 09:35:51
lazy_wheel.py	text/plain	7.95 KB	root/linksafe	-rw-r--r--	2023-11-13 09:35:51
session.py	text/plain	14.85 KB	root/linksafe	-rw-r--r--	2023-11-13 09:35:51
utils.py	text/x-script.python	4.07 KB	root/linksafe	-rw-r--r--	2023-11-13 09:35:51
xmlrpc.py	text/plain	1.84 KB	root/linksafe	-rw-r--r--	2023-11-13 09:35:51