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Fix Pinboard RSS parsing valid links as None

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`item.find(p)` returns either an `ElementTree.Element` or `None`.  The
[lambda on line 24][lambda] coerces the return value to a bool, which is
`False` if the `<link>` element has no children (see
[`ElementTree.py` line 207][etbooldef]), so the lambda returns `None`.

Further, returning a `Link` with `url=None` violates
[an assertion in `index/schema.py`][assertion], which crashes
the `archivebox add` command.

[lambda]: 3d54b1321b/archivebox/parsers/pinboard_rss.py (L24)
[etbooldef]: 3d8993a744/Lib/xml/etree/ElementTree.py (L207)
[assertion]: 3d54b1321b/archivebox/index/schema.py (L165)
This commit is contained in:
Ross Williams 2021-08-04 09:26:51 -04:00
parent 3d54b1321b
commit f6cf35a45d
1 changed files with 6 additions and 1 deletions
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7
archivebox/parsers/pinboard_rss.py
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@ -21,13 +21,18 @@ def parse_pinboard_rss_export(rss_file: IO[str], **_kwargs) -> Iterable[Link]:
root = ElementTree.parse(rss_file).getroot()
items = root.findall("{http://purl.org/rss/1.0/}item")
for item in items:
find = lambda p: item.find(p).text.strip() if item.find(p) else None # type: ignore
find = lambda p: item.find(p).text.strip() if item.find(p) is not None else None # type: ignore
url = find("{http://purl.org/rss/1.0/}link")
tags = find("{http://purl.org/dc/elements/1.1/}subject")
title = find("{http://purl.org/rss/1.0/}title")
ts_str = find("{http://purl.org/dc/elements/1.1/}date")
if url is None:
# Yielding a Link with no URL will
# crash on a URL validation assertion
continue
# Pinboard includes a colon in its date stamp timezone offsets, which
# Python can't parse. Remove it:
if ts_str and ts_str[-3:-2] == ":":