koa-proxies should be In front of the koa-bodyparser.

[guguji5]

I test koa proxies in my project, I find a weird bug when it works with koa-bodyparser.

// this works well.
const Koa = require('koa');
const app = new Koa();
const proxy = require('koa-proxies')
const bodyParser = require('koa-bodyparser');

app.use(proxy('/user', {
  target: 'http://example.com',    
  changeOrigin: true,
  rewrite: path => path
}))
app.use(bodyParser())
app.listen(8080);

// this works with bug "socket hang up".
const Koa = require('koa');
const app = new Koa();
const proxy = require('koa-proxies')
const bodyParser = require('koa-bodyparser');
app.use(bodyParser())

app.use(proxy('/user', {
  target: 'http://example.com',    
  changeOrigin: true,
  rewrite: path => path
}))

app.listen(8080);

the only difference is the sequence of the bodyParser and proxy.
I guess the post data will be consumed by the bodyParser, that is not what we want and will not proxy to our target, so it should be placed behind the proxy.

It will save our time if document it. Thank you.