KoaJS: Ending a response

Question

I have a simple koa echo server:

var koa = require('koa');
var app = koa();

app.use(require('koa-trie-router')(app));

app.route('/echo/:word')
.post(function* (next) {
  this.response.body = { echo: this.params.word };
  yield next;
});

app.listen(3000);

When I curl that end point I see this:

* Connection #0 to host localhost left intact
{"echo":"hello"}%  

But I can't figure out how to close that connection via the koa api. How do I complete a response?

Answer 1

koa uses a middleware pattern. yield next is used to go to the next middleware for your request handler. Since you don't have anymore middleware, you shouldn't yield next in this case. Just set the body and let the function close.

Answer 2

Just use:

app.route('/echo/:word')
.post(function* (next) {
     ctx.throw(401, { echo: this.params.word })
});