Fix HTTP 414 errors hanging until timeout

Author: Wor Ker

httplib.h

@@ -8403,8 +8403,6 @@ Server::process_request(Stream &strm, const std::string &remote_addr,
 
   // Check if the request URI doesn't exceed the limit
   if (req.target.size() > CPPHTTPLIB_REQUEST_URI_MAX_LENGTH) {
-    Headers dummy;
-    detail::read_headers(strm, dummy);
     res.status = StatusCode::UriTooLong_414;
     output_error_log(Error::ExceedUriMaxLength, &req);
     return write_response(strm, close_connection, req, res);

test/test.cc

@@ -4289,10 +4289,16 @@ TEST_F(ServerTest, TooLongRequest) {
   }
   request += "_NG";
 
+  auto start = std::chrono::high_resolution_clock::now();
   auto res = cli_.Get(request.c_str());
+  auto end = std::chrono::high_resolution_clock::now();
+  auto elapsed =
+      std::chrono::duration_cast<std::chrono::milliseconds>(end - start)
+          .count();
 
   ASSERT_TRUE(res);
   EXPECT_EQ(StatusCode::UriTooLong_414, res->status);
+  EXPECT_LE(elapsed, 100);
 }
 
 TEST_F(ServerTest, AlmostTooLongRequest) {
@@ -4363,10 +4369,16 @@ TEST_F(ServerTest, LongHeader) {
 }
 
 TEST_F(ServerTest, LongQueryValue) {
+  auto start = std::chrono::high_resolution_clock::now();
   auto res = cli_.Get(LONG_QUERY_URL.c_str());
+  auto end = std::chrono::high_resolution_clock::now();
+  auto elapsed =
+      std::chrono::duration_cast<std::chrono::milliseconds>(end - start)
+          .count();
 
   ASSERT_TRUE(res);
   EXPECT_EQ(StatusCode::UriTooLong_414, res->status);
+  EXPECT_LE(elapsed, 100);
 }
 
 TEST_F(ServerTest, TooLongQueryValue) {