http2: compat support for array headers

PR-URL: https://github.com/nodejs/node/pull/42901
Reviewed-By: Robert Nagy <ronagy@icloud.com>
Reviewed-By: Paolo Insogna <paolo@cowtech.it>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Ricky Zhou <0x19951125@gmail.com>
Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>

1 files changed, 13 insertions, 3 deletions

diff --git a/lib/internal/http2/compat.js b/lib/internal/http2/compat.js
index 596167990cd..0bda29233d5 100644
--- a/lib/internal/http2/compat.js
+++ b/lib/internal/http2/compat.js
@@ -682,9 +682,19 @@ class Http2ServerResponse extends Stream {
 
     let i;
     if (ArrayIsArray(headers)) {
-      for (i = 0; i < headers.length; i++) {
-        const header = headers[i];
-        this[kSetHeader](header[0], header[1]);
+      if (headers.length && ArrayIsArray(headers[0])) {
+        for (i = 0; i < headers.length; i++) {
+          const header = headers[i];
+          this[kSetHeader](header[0], header[1]);
+        }
+      } else {
+        if (headers.length % 2 !== 0) {
+          throw new ERR_INVALID_ARG_VALUE('headers', headers);
+        }
+
+        for (i = 0; i < headers.length; i += 2) {
+          this[kSetHeader](headers[i], headers[i + 1]);
+        }
       }
     } else if (typeof headers === 'object') {
       const keys = ObjectKeys(headers);