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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>
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Ville Vesilehto 2025-05-03 11:39:01 +03:00 • committed by GitHub
parent 9589519d58
commit 7b752106ac
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15
test/test.cc
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@ -43,6 +43,9 @@ const int PORT = 1234;
const string LONG_QUERY_VALUE = string(25000, '@');
const string LONG_QUERY_URL = "/long-query-value?key=" + LONG_QUERY_VALUE;
const string TOO_LONG_QUERY_VALUE = string(35000, '@');
const string TOO_LONG_QUERY_URL = "/too-long-query-value?key=" + TOO_LONG_QUERY_VALUE;
const std::string JSON_DATA = "{\"hello\":\"world\"}";
const string LARGE_DATA = string(1024 * 1024 * 100, '@'); // 100MB
@ -2867,6 +2870,11 @@ protected:
EXPECT_EQ(LONG_QUERY_URL, req.target);
EXPECT_EQ(LONG_QUERY_VALUE, req.get_param_value("key"));
})
.Get("/too-long-query-value",
[&](const Request &req, Response & /*res*/) {
EXPECT_EQ(TOO_LONG_QUERY_URL, req.target);
EXPECT_EQ(TOO_LONG_QUERY_VALUE, req.get_param_value("key"));
})
.Get("/array-param",
[&](const Request &req, Response & /*res*/) {
EXPECT_EQ(3u, req.get_param_value_count("array"));
@ -3655,6 +3663,13 @@ TEST_F(ServerTest, LongQueryValue) {
EXPECT_EQ(StatusCode::UriTooLong_414, res->status);
}
TEST_F(ServerTest, TooLongQueryValue) {
auto res = cli_.Get(TOO_LONG_QUERY_URL.c_str());
ASSERT_FALSE(res);
EXPECT_EQ(Error::Read, res.error());
}
TEST_F(ServerTest, TooLongHeader) {
Request req;
req.method = "GET";