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http-backend: allow empty CONTENT_LENGTH

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According to RFC3875, empty environment variable is equivalent to unset,
and for CONTENT_LENGTH it should mean zero body to read.

However, unset CONTENT_LENGTH is also used for chunked encoding to indicate
reading until EOF. At least, the test "large fetch-pack requests can be split
across POSTs" from t5551 starts faliing, if unset or empty CONTENT_LENGTH is
treated as zero length body. So keep the existing behavior as much as possible.

Add a test for the case.

Reported-By: Jelmer Vernooij <jelmer@jelmer.uk>
Signed-off-by: Max Kirillov <max@max630.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Max Kirillov 2018-09-07 06:36:07 +03:00 committed by Junio C Hamano
parent eebfe40962
commit 574c513e8d
2 changed files with 12 additions and 1 deletions
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2
http-backend.c
View File

@ -353,7 +353,7 @@ static ssize_t get_content_length(void)
ssize_t val = -1;
const char *str = getenv("CONTENT_LENGTH");
if (str && !git_parse_ssize_t(str, &val))
if (str && *str && !git_parse_ssize_t(str, &val))
die("failed to parse CONTENT_LENGTH: %s", str);
return val;
}

11
t/t5562-http-backend-content-length.sh
View File

@ -153,4 +153,15 @@ test_expect_success 'CONTENT_LENGTH overflow ssite_t' '
grep "fatal:.*CONTENT_LENGTH" err
'
test_expect_success 'empty CONTENT_LENGTH' '
env \
QUERY_STRING=/repo.git/HEAD \
PATH_TRANSLATED="$PWD"/.git/HEAD \
GIT_HTTP_EXPORT_ALL=TRUE \
REQUEST_METHOD=GET \
CONTENT_LENGTH="" \
git http-backend <empty_body >act.out 2>act.err &&
verify_http_result "200 OK"
'
test_done