test: cors headers sent when payload is stream

[Uzlopak]

Resolves #259
Proof that cors headers are sent when sending stream payloads

Checklist

• run npm run test and npm run benchmark
• tests and/or benchmarks are included
• documentation is changed or added
• commit message and code follows the Developer's Certification of Origin
  and the Code of conduct

[thevolcanomanishere]

I think I am having the same problem

Below works:

import Fastify from "fastify";
import BetterSSE from "better-sse";
import cors from "@fastify/cors";

const { createSession } = BetterSSE;

const fastify = Fastify();
fastify.register(cors, {
  //   origin: "*",
});

fastify.get("/sse", async (request, reply) => {
  reply.raw.setHeader("Access-Control-Allow-Origin", "*");
  console.log("hit");
  const session = await createSession(request.raw, reply.raw);
  session.push("Test");
});

fastify.listen({ port: 3000 }, function (err, address) {
  console.log("listening on port 3000");
  if (err) {
    fastify.log.error(err);
    process.exit(1);
  }
});

Below doesnt work:

import Fastify from "fastify";
import BetterSSE from "better-sse";
import cors from "@fastify/cors";

const { createSession } = BetterSSE;

const fastify = Fastify();
fastify.register(cors, {
     origin: "*",
});

fastify.get("/sse", async (request, reply) => {
  // reply.raw.setHeader("Access-Control-Allow-Origin", "*");
  console.log("hit");
  const session = await createSession(request.raw, reply.raw);
  session.push("Test");
});

fastify.listen({ port: 3000 }, function (err, address) {
  console.log("listening on port 3000");
  if (err) {
    fastify.log.error(err);
    process.exit(1);
  }
});

[Uzlopak]

If you can provide a simple repo, I could investigate it.

[mcollina]

lgtm