Python hashes.Hashes方法代码示例

# 需要导入模块: from pip._internal.utils import hashes [as 别名]
# 或者: from pip._internal.utils.hashes import Hashes [as 别名]
def hashes(self, trust_internet=True):
        """Return a hash-comparer that considers my option- and URL-based
        hashes to be known-good.

        Hashes in URLs--ones embedded in the requirements file, not ones
        downloaded from an index server--are almost peers with ones from
        flags. They satisfy --require-hashes (whether it was implicitly or
        explicitly activated) but do not activate it. md5 and sha224 are not
        allowed in flags, which should nudge people toward good algos. We
        always OR all hashes together, even ones from URLs.

        :param trust_internet: Whether to trust URL-based (#md5=...) hashes
            downloaded from the internet, as by populate_link()

        """
        good_hashes = self.options.get('hashes', {}).copy()
        link = self.link if trust_internet else self.original_link
        if link and link.hash:
            good_hashes.setdefault(link.hash_name, []).append(link.hash)
        return Hashes(good_hashes) 

# 需要导入模块: from pip._internal.utils import hashes [as 别名]
# 或者: from pip._internal.utils.hashes import Hashes [as 别名]
def _check_download_dir(link, download_dir, hashes):
    # type: (Link, str, Hashes) -> Optional[str]
    """ Check download_dir for previously downloaded file with correct hash
        If a correct file is found return its path else None
    """
    download_path = os.path.join(download_dir, link.filename)
    if os.path.exists(download_path):
        # If already downloaded, does its hash match?
        logger.info('File was already downloaded %s', download_path)
        if hashes:
            try:
                hashes.check_against_path(download_path)
            except HashMismatch:
                logger.warning(
                    'Previously-downloaded file %s has bad hash. '
                    'Re-downloading.',
                    download_path
                )
                os.unlink(download_path)
                return None
        return download_path
    return None 

# 需要导入模块: from pip._internal.utils import hashes [as 别名]
# 或者: from pip._internal.utils.hashes import Hashes [as 别名]
def hashes(self, trust_internet=True):
        # type: (bool) -> Hashes
        """Return a hash-comparer that considers my option- and URL-based
        hashes to be known-good.

        Hashes in URLs--ones embedded in the requirements file, not ones
        downloaded from an index server--are almost peers with ones from
        flags. They satisfy --require-hashes (whether it was implicitly or
        explicitly activated) but do not activate it. md5 and sha224 are not
        allowed in flags, which should nudge people toward good algos. We
        always OR all hashes together, even ones from URLs.

        :param trust_internet: Whether to trust URL-based (#md5=...) hashes
            downloaded from the internet, as by populate_link()

        """
        good_hashes = self.options.get('hashes', {}).copy()
        link = self.link if trust_internet else self.original_link
        if link and link.hash:
            good_hashes.setdefault(link.hash_name, []).append(link.hash)
        return Hashes(good_hashes) 

# 需要导入模块: from pip._internal.utils import hashes [as 别名]
# 或者: from pip._internal.utils.hashes import Hashes [as 别名]
def _download_http_url(
    link,  # type: Link
    downloader,  # type: Downloader
    temp_dir,  # type: str
    hashes,  # type: Optional[Hashes]
):
    # type: (...) -> Tuple[str, str]
    """Download link url into temp_dir using provided session"""
    download = downloader(link)

    file_path = os.path.join(temp_dir, download.filename)
    with open(file_path, 'wb') as content_file:
        for chunk in download.chunks:
            content_file.write(chunk)

    if hashes:
        hashes.check_against_path(file_path)

    return file_path, download.response.headers.get('content-type', '') 

# 需要导入模块: from pip._internal.utils import hashes [as 别名]
# 或者: from pip._internal.utils.hashes import Hashes [as 别名]
def _check_download_dir(link, download_dir, hashes):
    # type: (Link, str, Optional[Hashes]) -> Optional[str]
    """ Check download_dir for previously downloaded file with correct hash
        If a correct file is found return its path else None
    """
    download_path = os.path.join(download_dir, link.filename)

    if not os.path.exists(download_path):
        return None

    # If already downloaded, does its hash match?
    logger.info('File was already downloaded %s', download_path)
    if hashes:
        try:
            hashes.check_against_path(download_path)
        except HashMismatch:
            logger.warning(
                'Previously-downloaded file %s has bad hash. '
                'Re-downloading.',
                download_path
            )
            os.unlink(download_path)
            return None
    return download_path 

# 需要导入模块: from pip._internal.utils import hashes [as 别名]
# 或者: from pip._internal.utils.hashes import Hashes [as 别名]
def __init__(
        self,
        project_name,         # type: str
        supported_tags,       # type: List[Pep425Tag]
        specifier,            # type: specifiers.BaseSpecifier
        prefer_binary=False,  # type: bool
        allow_all_prereleases=False,  # type: bool
        hashes=None,                  # type: Optional[Hashes]
    ):
        # type: (...) -> None
        """
        :param supported_tags: The PEP 425 tags supported by the target
            Python in order of preference (most preferred first).
        """
        self._allow_all_prereleases = allow_all_prereleases
        self._hashes = hashes
        self._prefer_binary = prefer_binary
        self._project_name = project_name
        self._specifier = specifier
        self._supported_tags = supported_tags 

# 需要导入模块: from pip._internal.utils import hashes [as 别名]
# 或者: from pip._internal.utils.hashes import Hashes [as 别名]
def make_candidate_evaluator(
        self,
        project_name,    # type: str
        specifier=None,  # type: Optional[specifiers.BaseSpecifier]
        hashes=None,     # type: Optional[Hashes]
    ):
        # type: (...) -> CandidateEvaluator
        """Create a CandidateEvaluator object to use.
        """
        candidate_prefs = self._candidate_prefs
        return CandidateEvaluator.create(
            project_name=project_name,
            target_python=self._target_python,
            prefer_binary=candidate_prefs.prefer_binary,
            allow_all_prereleases=candidate_prefs.allow_all_prereleases,
            specifier=specifier,
            hashes=hashes,
        ) 

# 需要导入模块: from pip._internal.utils import hashes [as 别名]
# 或者: from pip._internal.utils.hashes import Hashes [as 别名]
def find_best_candidate(
        self,
        project_name,       # type: str
        specifier=None,     # type: Optional[specifiers.BaseSpecifier]
        hashes=None,        # type: Optional[Hashes]
    ):
        # type: (...) -> BestCandidateResult
        """Find matches for the given project and specifier.

        :param specifier: An optional object implementing `filter`
            (e.g. `packaging.specifiers.SpecifierSet`) to filter applicable
            versions.

        :return: A `BestCandidateResult` instance.
        """
        candidates = self.find_all_candidates(project_name)
        candidate_evaluator = self.make_candidate_evaluator(
            project_name=project_name,
            specifier=specifier,
            hashes=hashes,
        )
        return candidate_evaluator.compute_best_candidate(candidates) 

# 需要导入模块: from pip._internal.utils import hashes [as 别名]
# 或者: from pip._internal.utils.hashes import Hashes [as 别名]
def get_http_url(
    link,  # type: Link
    downloader,  # type: Downloader
    download_dir=None,  # type: Optional[str]
    hashes=None,  # type: Optional[Hashes]
):
    # type: (...) -> File
    temp_dir = TempDirectory(kind="unpack", globally_managed=True)
    # If a download dir is specified, is the file already downloaded there?
    already_downloaded_path = None
    if download_dir:
        already_downloaded_path = _check_download_dir(
            link, download_dir, hashes
        )

    if already_downloaded_path:
        from_path = already_downloaded_path
        content_type = mimetypes.guess_type(from_path)[0]
    else:
        # let's download to a tmp dir
        from_path, content_type = _download_http_url(
            link, downloader, temp_dir.path, hashes
        )

    return File(from_path, content_type) 

# 需要导入模块: from pip._internal.utils import hashes [as 别名]
# 或者: from pip._internal.utils.hashes import Hashes [as 别名]
def __init__(
        self,
        project_name,         # type: str
        supported_tags,       # type: List[Tag]
        specifier,            # type: specifiers.BaseSpecifier
        prefer_binary=False,  # type: bool
        allow_all_prereleases=False,  # type: bool
        hashes=None,                  # type: Optional[Hashes]
    ):
        # type: (...) -> None
        """
        :param supported_tags: The PEP 425 tags supported by the target
            Python in order of preference (most preferred first).
        """
        self._allow_all_prereleases = allow_all_prereleases
        self._hashes = hashes
        self._prefer_binary = prefer_binary
        self._project_name = project_name
        self._specifier = specifier
        self._supported_tags = supported_tags