[PATCH v2 12/17] utils: fix: Fix charset issue for get_decoded_payload()

[Muhammad Rizki <kiizuha@gnuweeb.org>]

Fix the `LookupError` that is thrown by the `decode()` function. The
`unknown-8bit` charset is not found in the built-in `decode()` function
in Python, so we must manually fix it by using an if statement and
decoding using the `ascii` charset while forcing errors using
`surrogateescape`.

Sample: https://lore.kernel.org/all/Y8Am5wAxC48N12PE@quaddy.sgn/raw

Signed-off-by: Muhammad Rizki <kiizuha@gnuweeb.org>
---
 daemon/atom/utils.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/daemon/atom/utils.py b/daemon/atom/utils.py
index 96a10a0..73c8978 100644
--- a/daemon/atom/utils.py
+++ b/daemon/atom/utils.py
@@ -323,6 +323,9 @@ def get_decoded_payload(payload: Message):
 		return payload.get_payload(decode=True) \
 			.decode(errors="replace")
 
+	if charset == "unknown-8bit":
+		return p.encode().decode("utf-8", "surrogateescape")
+
 	return p.encode().decode(charset, errors="replace")
 
 
-- 
Muhammad Rizki