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Make parsing of References and In-Reply-To header less error prone

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According to RFC2822 References and In-Reply-To headers are supposed
to contain one or more Message-IDs, however older RFC822 allowed
almost any content. When both References and In-Reply-To headers ends
with something else that a Message-ID (see e.g. [1]), the thread
structure presented by notmuch is incorrect. The reason is that
notmuch treats this case as if the email contained no "replyto"
information (see _notmuch_database_link_message_to_parents).

This patch changes the parse_references() function to return the last
valid Message-ID encountered rather than NULL resulting from the last
hunk of text not being the Message-ID.

[1] https://lkml.org/lkml/headers/2014/5/19/864
This commit is contained in:
Michal Sojka 2014-05-26 16:05:57 +02:00 committed by David Bremner
parent 61993923b4
commit 028c56061e
2 changed files with 6 additions and 10 deletions
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15
lib/database.cc
View file

@ -524,7 +524,7 @@ parse_references (void *ctx,
GHashTable *hash,
const char *refs)
{
char *ref;
char *ref, *last_ref = NULL;
if (refs == NULL || *refs == '\0')
return NULL;
@ -532,20 +532,17 @@ parse_references (void *ctx,
while (*refs) {
ref = _parse_message_id (ctx, refs, &refs);
if (ref && strcmp (ref, message_id))
if (ref && strcmp (ref, message_id)) {
g_hash_table_insert (hash, ref, NULL);
last_ref = ref;
}
}
/* The return value of this function is used to add a parent
* reference to the database. We should avoid making a message
* its own parent, thus the following check.
* its own parent, thus the above check.
*/
if (ref && strcmp(ref, message_id)) {
return ref;
} else {
return NULL;
}
return last_ref;
}
notmuch_status_t

1
test/T510-thread-replies.sh
View file

@ -138,7 +138,6 @@ expected=`echo "$expected" | notmuch_json_show_sanitize`
test_expect_equal_json "$output" "$expected"
test_begin_subtest "Ignore garbage at the end of References"
test_subtest_known_broken
add_message '[id]="foo@five.com"' \
'[subject]="five"'
add_message '[id]="bar@five.com"' \