http: res.setHeader 18.x backport

marco-ippolito · marco-ippolito · commit e835966e1c4f · 2023-02-21T17:48:19.000+01:00
diff --git a/lib/_http_server.js b/lib/_http_server.js
@@ -378,6 +378,9 @@ function writeHead(statusCode, reason, obj) {
         if (k) this.setHeader(k, obj[k]);
       }
     }
+    if (k === undefined && this._header) {
+      throw new ERR_HTTP_HEADERS_SENT('render');
+    }
     // Only progressive api is used
     headers = this[kOutHeaders];
   } else {

Original file line number	Diff line number	Diff line change
`@@ -378,6 +378,9 @@ function writeHead(statusCode, reason, obj) {`
`378`	`378`	`if (k) this.setHeader(k, obj[k]);`
`379`	`379`	`}`
`380`	`380`	`}`
	`381`	`+ if (k === undefined && this._header) {`
	`382`	`+ throw new ERR_HTTP_HEADERS_SENT('render');`
	`383`	`+ }`
`381`	`384`	`// Only progressive api is used`
`382`	`385`	`headers = this[kOutHeaders];`
`383`	`386`	`} else {`