nghttpx: Don't forward Trailer header field

genheaderfunc.py

@@ -20,6 +20,7 @@ HEADERS = [
     "alt-svc",
     "content-length",
     "location",
+    "trailer",
     # disallowed h1 headers
     'connection',
     'keep-alive',

src/http2.cc

@@ -239,6 +239,7 @@ void copy_headers_to_nva(std::vector<nghttp2_nv> &nva, const Headers &headers) {
     case HD_KEEP_ALIVE:
     case HD_PROXY_CONNECTION:
     case HD_SERVER:
+    case HD_TRAILER:
     case HD_TRANSFER_ENCODING:
     case HD_UPGRADE:
     case HD_VIA:
@@ -263,6 +264,7 @@ void build_http1_headers_from_headers(std::string &hdrs,
     case HD_KEEP_ALIVE:
     case HD_PROXY_CONNECTION:
     case HD_SERVER:
+    case HD_TRAILER:
     case HD_UPGRADE:
     case HD_VIA:
     case HD_X_FORWARDED_FOR:
@@ -506,6 +508,11 @@ int lookup_token(const uint8_t *name, size_t namelen) {
         return HD_UPGRADE;
       }
       break;
+    case 'r':
+      if (util::streq("traile", name, 6)) {
+        return HD_TRAILER;
+      }
+      break;
     case 's':
       if (util::streq(":statu", name, 6)) {
         return HD__STATUS;

src/http2.h

@@ -203,6 +203,7 @@ enum {
   HD_PROXY_CONNECTION,
   HD_SERVER,
   HD_TE,
+  HD_TRAILER,
   HD_TRANSFER_ENCODING,
   HD_UPGRADE,
   HD_VIA,