From ae2349ca536e543a01e3dd866512f03381727b65 Mon Sep 17 00:00:00 2001
From: bcoll <bcoll@cloudflare.com>
Date: Thu, 11 Aug 2022 13:03:47 +0100
Subject: [PATCH] Return custom `Content-Encoding`s, closes #312

---
 packages/http-server/src/index.ts       | 1 -
 packages/http-server/test/index.spec.ts | 4 +++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/packages/http-server/src/index.ts b/packages/http-server/src/index.ts
index 98f20d382..4e26e7ba1 100644
--- a/packages/http-server/src/index.ts
+++ b/packages/http-server/src/index.ts
@@ -195,7 +195,6 @@ async function writeResponse(
       } else {
         // Unknown encoding, don't do any encoding at all
         log?.warn(`Unknown encoding \"${coding}\", sending plain response...`);
-        delete headers["content-encoding"];
         encoders.length = 0;
         break;
       }
diff --git a/packages/http-server/test/index.spec.ts b/packages/http-server/test/index.spec.ts
index b964d4737..c6f5e630d 100644
--- a/packages/http-server/test/index.spec.ts
+++ b/packages/http-server/test/index.spec.ts
@@ -521,7 +521,7 @@ const autoEncodeMacro: Macro<
     http.get({ port }, async (res) => {
       t.is(res.headers["content-length"], undefined);
       t.is(res.headers["transfer-encoding"], "chunked");
-      t.is(res.headers["content-encoding"], encodes ? encoding : undefined);
+      t.is(res.headers["content-encoding"], encoding);
       const compressed = await buffer(res);
       const decompressed = decompress(compressed);
       if (encodes) t.true(compressed.byteLength < decompressed.byteLength);
@@ -542,6 +542,8 @@ test(autoEncodeMacro, "deflate, gZip", (buffer) =>
 );
 // Should skip all encoding with single unknown encoding
 test(autoEncodeMacro, "deflate, unknown, gzip", (buffer) => buffer, false);
+// Should allow custom `Content-Encoding`s: https://github.com/cloudflare/miniflare/issues/312
+test(autoEncodeMacro, "custom", (buffer) => buffer, false);
 test("createRequestListener: skips encoding already encoded data", async (t) => {
   const encoded = new Uint8Array(zlib.gzipSync(Buffer.from(longText, "utf8")));
   const mf = useMiniflareWithHandler(