HTTP: intern the version and avoid allocationv2.0.0-alpha.1

There are only a few possible reasonable values, and we can intern
them to avoid any allocations for it.  (We will probably do the same
for the HTTP method shortly as well.)

1 files changed, 5 insertions, 0 deletions

diff --git a/include/nng/supplemental/http/http.h b/include/nng/supplemental/http/http.h
index fa81f984..bb163949 100644
--- a/include/nng/supplemental/http/http.h
+++ b/include/nng/supplemental/http/http.h
@@ -87,6 +87,11 @@ enum nng_http_status {
 	NNG_HTTP_STATUS_NETWORK_AUTH_REQUIRED    = 511,
 };
 
+#define NNG_HTTP_VERSION_1_0 "HTTP/1.0"
+#define NNG_HTTP_VERSION_1_1 "HTTP/1.1"
+#define NNG_HTTP_VERSION_2 "HTTP/2"
+#define NNG_HTTP_VERSION_3 "HTTP/3"
+
 // nng_http_req represents an HTTP request.
 typedef struct nng_http_req nng_http_req;