feat(ext/http): Add support for trailers w/internal API (HTTP/2 only) (#19182)

Necessary for #3326. 

Requested in #10214 as well.

1 files changed, 8 insertions, 0 deletions

diff --git a/ext/http/00_serve.js b/ext/http/00_serve.js
index 9075ae651..7186da1fe 100644
--- a/ext/http/00_serve.js
+++ b/ext/http/00_serve.js
@@ -60,6 +60,7 @@ const {
   op_http_set_response_body_text,
   op_http_set_response_header,
   op_http_set_response_headers,
+  op_http_set_response_trailers,
   op_http_upgrade_raw,
   op_http_upgrade_websocket_next,
   op_http_wait,
@@ -75,6 +76,7 @@ const {
   "op_http_set_response_body_text",
   "op_http_set_response_header",
   "op_http_set_response_headers",
+  "op_http_set_response_trailers",
   "op_http_upgrade_raw",
   "op_http_upgrade_websocket_next",
   "op_http_wait",
@@ -125,6 +127,11 @@ function upgradeHttpRaw(req, conn) {
   throw new TypeError("upgradeHttpRaw may only be used with Deno.serve");
 }
 
+function addTrailers(resp, headerList) {
+  const inner = toInnerResponse(resp);
+  op_http_set_response_trailers(inner.slabId, headerList);
+}
+
 class InnerRequest {
   #slabId;
   #context;
@@ -687,6 +694,7 @@ function serve(arg1, arg2) {
   return { finished };
 }
 
+internals.addTrailers = addTrailers;
 internals.upgradeHttpRaw = upgradeHttpRaw;
 
 export { serve, upgradeHttpRaw };