Hono Support for http-proxy-middleware

[shaaridev]

Describe the feature you'd love to see

Hi,

Integrating support for Hono within http-proxy-middleware will be an awesome feature., especially considering Hono's widespread popularity as a web framework compatible with Node.js, Deno, and Bun.

Github Hono
Hono

Additional context (optional)

No response

[chimurai]

happy to receive a PR / recipe for Hono

[branaway]

tried running a sample with bun, I got this:

TypeError: undefined is not an object (evaluating 'server.on')
    at <anonymous> (/Users/bran/localProjects/Slides/node_modules/http-proxy-middleware/dist/http-proxy-middleware.js:56:17)
    at <anonymous> (/Users/bran/localProjects/Slides/node_modules/http-proxy-middleware/dist/http-proxy-middleware.js:50:22)
    at processTicksAndRejections (native:7:39)

[mrvnklm]

I can recommend ElysiaJS for anyone being stuck here.

[branaway]

ElysiaJS is a high-level web framework. I'm testing the proxy here.

[jacksteamdev]

You can use http-proxy-middleware with Hono and @hono/node-server. The trick is to use serve(app) so c.env.incoming is defined.

import { serve, type HttpBindings } from '@hono/node-server'
import { Hono } from 'hono'
import { createProxyMiddleware } from 'http-proxy-middleware'

const proxy = createProxyMiddleware({
  // your settings
})

export const app = new Hono<{ Bindings: HttpBindings }>()

app.use('*', (c, _next) => {
  return new Promise((resolve, reject) => {
    proxy(c.env.incoming, c.env.outgoing, (err) => {
      if (err) {
        reject(err)
      } else {
        resolve()
      }
    })
  })
})

serve(app, () => {
  console.log(`Listening on http://localhost:${server.port}`)
})

// This won't work; c.env.incoming will be undefined
// export default serve