fastify-uws/dist/plugin-eventsource.js

A performant HTTP and WebSocket server for Fastify with uWebSockets.

import u from "fastify-plugin";
import { pushable as o } from "it-pushable";
import d from "it-to-stream";
const C = u(
  async (t, e) => {
    t.decorateReply("sse", function(r) {
      var s;
      if (!this.raw.headersSent) {
        this.sseContext = { source: o({ objectMode: !0 }) };
        const a = this.getHeaders();
        for (const [c, f] of Object.entries(a))
          this.raw.setHeader(c, f ?? "");
        this.raw.setHeader("Content-Type", "text/event-stream; charset=utf-8"), this.raw.setHeader("Connection", "keep-alive"), this.raw.setHeader(
          "Cache-Control",
          "private, no-cache, no-store, must-revalidate, max-age=0, no-transform"
        ), this.raw.setHeader("Pragma", "no-cache"), this.raw.setHeader("Expire", "0"), this.raw.setHeader("X-Accel-Buffering", "no"), n(this, this.sseContext.source);
      }
      if (l(r))
        return n(this, r);
      (s = this.sseContext) != null && s.source || (this.sseContext = { source: o({ objectMode: !0 }) }, n(this, this.sseContext.source)), this.sseContext.source.push(r);
    });
  },
  {
    fastify: "5.x",
    name: "@fastify/eventsource"
  }
);
function n(t, e) {
  d(h(e)).pipe(t.raw);
}
async function* h(t) {
  for await (const e of t)
    yield m(e);
}
function l(t) {
  return t == null || typeof t != "object" ? !1 : Symbol.asyncIterator in t;
}
const p = (t) => typeof t > "u", y = (t) => p(t) || t === null, b = (t) => !y(t) && typeof t == "object";
function i(t) {
  return b(t) ? i(JSON.stringify(t)) : t.split(/\r\n|\r|\n/).map((e) => `data: ${e}
`).join("");
}
function m(t) {
  let e = t.event ? `event: ${t.event}
` : "";
  return e += t.id ? `id: ${t.id}
` : "", e += t.retry ? `retry: ${t.retry}
` : "", e += t.data ? i(t.data) : "", e += `
`, e;
}
export {
  C as default,
  h as transformAsyncIterable
};