Cyan•4w ago

koa-router behaves different in Deno

Trying to run following script

import Koa from 'koa/lib/application';
import KoaRouter from '@koa/router';

const app = new Koa({});
const router = new KoaRouter();

app.use(router.routes())
router.get("/", (ctx, next) => {
  ctx.type = "text/javascript"
  ctx.body = "console.log('hello')"
})

app.listen(2000)

import Koa from 'koa/lib/application';
import KoaRouter from '@koa/router';

const app = new Koa({});
const router = new KoaRouter();

app.use(router.routes())
router.get("/", (ctx, next) => {
  ctx.type = "text/javascript"
  ctx.body = "console.log('hello')"
})

app.listen(2000)

With Node.js, request http://127.0.0.1:2000/ gives me console.log('hello') with Content-Type set to text/javascript. But with Deno, request the same url, gives console.log('hello'), but the Content-Type is set to text/plain. Then, your browser will refuse to execute the script if the Content-Type is not correct. And everything is broken. I can't simply switch to Oakserver, this is just a minimal repro. In fact, the actual project is so large and coupled with Koa deeply. Also ctx.type works correctly without koa-router. I don't know what is going on underlying koa-router

2 Replies

marvinh.•4w ago

This was fixed with https://github.com/denoland/deno/pull/27105 . The fix was included in Deno 2.1.2 To resolve this issue update your Deno version to 2.1.2 by running deno upgrade

CyanOP•4w ago

I'll try it tomorrow. Thanks I can confirmed it's fixed!

koa-router behaves different in Deno

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