fix: appended CRLF to end of trailer headers (#3989)

2 files changed, 3 insertions, 1 deletions

diff --git a/std/http/server.ts b/std/http/server.ts
index b8a41379f..c6a895a1f 100644
--- a/std/http/server.ts
+++ b/std/http/server.ts
@@ -84,6 +84,7 @@ export async function writeTrailers(
     );
     await writer.write(encoder.encode(`${key}: ${value}\r\n`));
   }
+  await writer.write(encoder.encode("\r\n"));
   await writer.flush();
 }
 
diff --git a/std/http/server_test.ts b/std/http/server_test.ts
index a18cd273c..123bc7155 100644
--- a/std/http/server_test.ts
+++ b/std/http/server_test.ts
@@ -456,6 +456,7 @@ test("writeResponse with trailer", async () => {
     "",
     "deno: land",
     "node: js",
+    "",
     ""
   ].join("\r\n");
   assertEquals(ret, exp);
@@ -775,7 +776,7 @@ test("writeTrailer", async () => {
     new Headers({ "transfer-encoding": "chunked", trailer: "deno,node" }),
     new Headers({ deno: "land", node: "js" })
   );
-  assertEquals(w.toString(), "deno: land\r\nnode: js\r\n");
+  assertEquals(w.toString(), "deno: land\r\nnode: js\r\n\r\n");
 });
 
 test("writeTrailer should throw", async () => {