hono-on-headers

Provide room for logic when Hono begins writing response headers.

Installation

$ bun i hono-on-headers

Example

import { Hono } from "hono";
import onHeaders from "hono-on-headers";

function someLogic () {
    console.log("response is departing");
    // You can change status code
    this.status(203);
    // You can add new headers
    this.header("oneMoreHeader", "value");
    this.header("oneMore", "value");
    // or any other logic
}

const app = new Hono();

app.use((ctx, next) => {
    onHeaders(ctx, someLogic);
    next();
});

app.get("/", (ctx) => {
    return ctx.text("Created!", 201);
});

export default {
    port: 3000,
    fetch: app.fetch,
  };
  

Notice

Manually using Hono's New Response(...) syntax to return your responses will override the functionality of this package. This is explained in this comment. As New Response(...) creates an entirely new response (separated from the middleware's Context object). Hono will ignore the context object.

Testing

This package is currently functional but not tested enough for me to not have a disclaimer put on, so until I receive enough lgtms by people using it, this disclaimer will remain on the readme.

Open an issue if anything comes up or send me a message on Discord AC#4155

Elysia JS users

If you're using Elysia JS, just latch into the native Elysia onResponse api and provide a callback with your logic, look here.

License

MIT