Reading raw data doesn't appear to work

Surely I’m doing something wrong, but this isn’t working for me:

'use strict';
const koa = require('koa');
const bodyParser = require('koa-bodyparser');

const app = koa();
app.use(bodyParser({
  enableTypes: ['text']
}));
app.use(function *() {
  this.body = this.request.body;
});
app.listen(3000);

$ curl -v --data 'Hello world' localhost:3000
* Rebuilt URL to: localhost:3000/
* Hostname was NOT found in DNS cache
*   Trying ::1...
* Connected to localhost (::1) port 3000 (#0)
> POST / HTTP/1.1
> User-Agent: curl/7.37.1
> Host: localhost:3000
> Accept: */*
> Content-Length: 11
> Content-Type: application/x-www-form-urlencoded
>
* upload completely sent off: 11 out of 11 bytes
< HTTP/1.1 200 OK
< Content-Type: application/json; charset=utf-8
< Content-Length: 2
< Date: Thu, 19 May 2016 03:29:36 GMT
< Connection: keep-alive
<
* Connection #0 to host localhost left intact
{}

[dead-horse]

try this:

bodyparser({
  extendTypes: {
    text: ['application/xml'],
  },
  enableTypes: ['text'],
})

[wesley-firewalla]

try this:

bodyparser({
  extendTypes: {
    text: ['application/xml'],
  },
  enableTypes: ['text'],
})

it should be

bodyparser({
  extendTypes: {
    text: ['application/xml'],
  },
  enableTypes: ['json', 'text'],
})