MagicStack
.pgpass file support handles backslash escapes incorrectly; should de-escape values
https://www.postgresql.org/docs/current/libpq-pgpass.html isn't fully explicit about how to handle backslash escapes in the .pgpass file, however it's reasonably clear from the phrasing that backslashes serve only to escape backslashes and colons and therefore aren't considered part of the value they're used in. E.g., a .pgpass row of …
*:*:test\:db:test\\:password from pgpass with escapes
conveys:
- a database name of
test:db, nottest\:db - a user name of
test\, nottest\\
I ran into this problem because I have a password of 4:K1…, encoded as 4\:K1…, and it works with psql but not asyncpg. Once I remove the backslash from .pgpass, it starts working with asyncpg but failing with psql.
I would've provided a failing test and even a code change, but I can't get python setup.py test or pip install -e .[test] to work in a run-of-the-mill Python 3.12 virtualenv on my run-of-the-mill MacOS.
@elprans, any chance we can fix this in the upcoming 0.31 release? If yes, then I will volunteer to make another attempt to get a test environment running on my machine and provide a fix and unit test.
