lib/cpp-httplib
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* fix(parser): Limit line length in getline

Prevents potential infinite loop and memory exhaustion in
stream_line_reader::getline by enforcing max line length.

Signed-off-by: Ville Vesilehto <ville@vesilehto.fi>

* fix: increase default max line length to 32k

LONG_QUERY_VALUE test is set at 25k.

Signed-off-by: Ville Vesilehto <ville@vesilehto.fi>

* test(client): expect read error with too long query

Adds a test case (`TooLongQueryValue`) to verify client behavior
when the request URI is excessively long, exceeding
`CPPHTTPLIB_MAX_LINE_LENGTH`. In this scenario, the server is
expected to reset the connection.

Signed-off-by: Ville Vesilehto <ville@vesilehto.fi>

---------

Signed-off-by: Ville Vesilehto <ville@vesilehto.fi>
This commit is contained in:
Ville Vesilehto
2025-05-03 11:39:01 +03:00
committed by GitHub
parent 9589519d58
commit 7b752106ac
2 changed files with 24 additions and 0 deletions
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9
httplib.h
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@ -145,6 +145,10 @@
#define CPPHTTPLIB_LISTEN_BACKLOG 5
#endif
#ifndef CPPHTTPLIB_MAX_LINE_LENGTH
#define CPPHTTPLIB_MAX_LINE_LENGTH 32768
#endif
/*
* Headers
*/
@ -3067,6 +3071,11 @@ inline bool stream_line_reader::getline() {
#endif
for (size_t i = 0;; i++) {
if (size() >= CPPHTTPLIB_MAX_LINE_LENGTH) {
// Treat exceptionally long lines as an error to
// prevent infinite loops/memory exhaustion
return false;
}
char byte;
auto n = strm_.read(&byte, 1);