var koa = require('koa');
var proxy = require('koa-proxy');
var app = koa();
app.use(proxy({
  host: 'http://alicdn.com'
}));
app.listen(3000);

app.get('index.js', proxy({
  url: 'http://alicdn.com/index.js'
}));

app.get('index.js', proxy({
  host: 'http://alicdn.com',
  map: {
    'index.js': 'index-1.js'
  }
}));

app.get('index.js', proxy({
  host: 'http://alicdn.com',
  map: function(path) { return 'public/' + path; }
}));

app.use(proxy({
  host:  'http://alicdn.com', // proxy alicdn.com...
  match: /^\/static\//        // ...just the /static folder
}));

app.use(proxy({
  host:  'http://alicdn.com',     // proxy alicdn.com...
  match: /^(?!\/dontproxy\.html)/ // ...everything except /dontproxy.html
}));

app.use(proxy({
  jar: true,
}));

app.use(proxy({
  suppressRequestHeaders: ['foo','bar'], // case-insensitive
  suppressResponseHeaders: ['jar-jar'] // case-insensitive
}));