fix: sending cookies in regional remix server with polyfills (#709)

* fix: regional remix server sending multiple cookies

* fix: react regional server sending multiple cookies

* fix: sending cookies in regional remix server with polyfills

platform/functions/react-server/regional-server.mjs

@@ -113,7 +113,7 @@ const createApigHandler = (build) => {
         ...Object.fromEntries(response.headers.entries()),
         "Transfer-Encoding": "chunked",
       },
-      cookies: response.headers.getSetCookie(),
+      cookies: accumulateCookies(response.headers),
     };
     if (response.body) {
       const reader = response.body;
@@ -127,6 +127,21 @@ const createApigHandler = (build) => {
   });
 };
 
+const accumulateCookies = (headers) => {
+  // node >= 19.7.0 with no remix fetch polyfill
+  if (typeof headers.getSetCookie === "function") {
+    return headers.getSetCookie();
+  }
+  // node < 19.7.0 or with remix fetch polyfill
+  const cookies = [];
+  for (let [key, value] of headers.entries()) {
+    if (key === "set-cookie") {
+      cookies.push(value);
+    }
+  }
+  return cookies;
+};
+
 const streamToNodeStream = async (reader, writer) => {
   let readResult = await reader.read();
   while (!readResult.done) {

platform/functions/remix-server/regional-server.mjs

@@ -113,7 +113,7 @@ const createApigHandler = (build) => {
         ...Object.fromEntries(response.headers.entries()),
         "Transfer-Encoding": "chunked",
       },
-      cookies: response.headers.getSetCookie(),
+      cookies: accumulateCookies(response.headers),
     };
 
     const writer = awslambda.HttpResponseStream.from(
@@ -130,6 +130,21 @@ const createApigHandler = (build) => {
   });
 };
 
+const accumulateCookies = (headers) => {
+  // node >= 19.7.0 with no remix fetch polyfill
+  if (typeof headers.getSetCookie === "function") {
+    return headers.getSetCookie();
+  }
+  // node < 19.7.0 or with remix fetch polyfill
+  const cookies = [];
+  for (let [key, value] of headers.entries()) {
+    if (key === "set-cookie") {
+      cookies.push(value);
+    }
+  }
+  return cookies;
+};
+
 const streamToNodeStream = async (reader, writer) => {
   let readResult = await reader.read();
   while (!readResult.done) {