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index: avoid indexing legacy-display parts

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When we notice a legacy-display part during indexing, it makes more
sense to avoid indexing it as part of the message body.

Given that the protected subject will already be indexed, there is no
need to index this part at all, so we skip over it.

If this happens during indexing, we set a property on the message:
index.repaired=skip-protected-headers-legacy-display

Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
This commit is contained in:
Daniel Kahn Gillmor 2019-08-29 11:38:53 -04:00 committed by David Bremner
parent c61e22d5cb
commit 9829533e92
3 changed files with 22 additions and 6 deletions
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6
doc/man7/notmuch-properties.rst
View file

@ -121,6 +121,12 @@ of its normal activity.
``index.repaired`` property to note the type of repair(s) it
performed.
``index.repaired=skip-protected-headers-legacy-display`` indicates
that when indexing the cleartext of an encrypted message, notmuch
skipped over a "legacy-display" text/rfc822-headers part that it
found in that message, since it was able to index the built-in
protected headers directly.
SEE ALSO
========

20
lib/index.cc
View file

@ -435,8 +435,14 @@ _index_mime_part (notmuch_message_t *message,
continue;
}
child = g_mime_multipart_get_part (multipart, i);
(void) _notmuch_message_crypto_potential_payload (msg_crypto, child, part, i);
_index_mime_part (message, indexopts, child, msg_crypto);
GMimeObject *toindex = child;
if (_notmuch_message_crypto_potential_payload (msg_crypto, child, part, i) &&
msg_crypto->decryption_status == NOTMUCH_MESSAGE_DECRYPTED_FULL) {
toindex = _notmuch_repair_crypto_payload_skip_legacy_display (child);
if (toindex != child)
notmuch_message_add_property (message, "index.repaired", "skip-protected-headers-legacy-display");
}
_index_mime_part (message, indexopts, toindex, msg_crypto);
}
return;
}
@ -573,8 +579,14 @@ _index_encrypted_mime_part (notmuch_message_t *message,
}
g_object_unref (decrypt_result);
}
_notmuch_message_crypto_potential_payload (msg_crypto, clear, GMIME_OBJECT (encrypted_data), GMIME_MULTIPART_ENCRYPTED_CONTENT);
_index_mime_part (message, indexopts, clear, msg_crypto);
GMimeObject *toindex = clear;
if (_notmuch_message_crypto_potential_payload (msg_crypto, clear, GMIME_OBJECT (encrypted_data), GMIME_MULTIPART_ENCRYPTED_CONTENT) &&
msg_crypto->decryption_status == NOTMUCH_MESSAGE_DECRYPTED_FULL) {
toindex = _notmuch_repair_crypto_payload_skip_legacy_display (clear);
if (toindex != clear)
notmuch_message_add_property (message, "index.repaired", "skip-protected-headers-legacy-display");
}
_index_mime_part (message, indexopts, toindex, msg_crypto);
g_object_unref (clear);
status = notmuch_message_add_property (message, "index.decryption", "success");

2
test/T356-protected-headers.sh
View file

@ -148,12 +148,10 @@ test_json_nodes <<<"$output" \
'no_legacy_display:["original"]["body"][0]["content"][1]["content-type"]="text/plain"'
test_begin_subtest "do not treat legacy-display part as body when indexing"
test_subtest_known_broken
output=$(notmuch search --output=messages body:interrupting)
test_expect_equal "$output" ''
test_begin_subtest "identify message that had a legacy display part skipped during indexing"
test_subtest_known_broken
output=$(notmuch search --output=messages property:index.repaired=skip-protected-headers-legacy-display)
test_expect_equal "$output" id:protected-with-legacy-display@crypto.notmuchmail.org