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Document DownloadError for RequestsFetcher.fetch()

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We should document that "DownloadError" is thrown inside
RequestsFetcher.fetch().

Signed-off-by: Martin Vrachev <mvrachev@vmware.com>
This commit is contained in:
Martin Vrachev 2022-01-19 20:24:02 +02:00
parent 8327ea12d3
commit 7bb916f962
1 changed files with 5 additions and 1 deletions
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6
tuf/ngclient/_internal/requests_fetcher.py
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@ -61,6 +61,7 @@ def fetch(self, url: str) -> Iterator[bytes]:
exceptions.SlowRetrievalError: A timeout occurs while receiving
data.
exceptions.FetcherHTTPError: An HTTP error code is received.
exceptions.DownloadError: When there is a problem parsing the url.
Returns:
A bytes iterator
@ -126,13 +127,16 @@ def _chunks(self, response: "requests.Response") -> Iterator[bytes]:
def _get_session(self, url: str) -> requests.Session:
"""Returns a different customized requests.Session per schema+hostname
combination.
Raises:
exceptions.DownloadError: When there is a problem parsing the url.
"""
# Use a different requests.Session per schema+hostname combination, to
# reuse connections while minimizing subtle security issues.
parsed_url = parse.urlparse(url)
if not parsed_url.scheme or not parsed_url.hostname:
raise exceptions.DownloadError("Failed to parse URL")
raise exceptions.DownloadError("Failed to parse URL {url}")
session_index = parsed_url.scheme + "+" + parsed_url.hostname
session = self._sessions.get(session_index)