```js

app.use((ctx, next) => {

let path = ctx.path;

let action = path.slice(path.lastIndexOf('/'));

path = path.slice(0, path.lastIndexOf('/'));

let include = false;

for (let key in koahub.controller) {

if (key == path) {

include = true;

break;

}

}

if (include) {

let ctrl = koahub.controller[path];

let pros = Object.getOwnPropertyNames(ctrl.prototype);

for (let k in pros) {

if ('/' + pros[k] == action) {

Object.getPrototypeOf(new ctrl())[pros[k]].call(this);

}

}

} else {

ctx.throw(404);

}

});

```