koa-lite/examples/errors.js

43 lines
895 B
JavaScript
Raw Normal View History

2013-08-28 03:36:44 +00:00
var http = require('http');
var koa = require('..');
var app = koa();
// look ma, error propagation!
app.use(function(next){
return function *(){
try {
yield next;
} catch (err) {
// some errors will have .status
// however this is not a guarantee
this.status = err.status || 500;
this.type = 'html';
this.body = '<p>Something <em>exploded</em>, please contact Maru.</p>';
// since we handled this manually we'll
// want to delegate to the regular app
// level error handling as well so that
// centralized still functions correctly.
this.app.emit('error', err);
}
}
});
// response
app.use(function(next){
return function *(){
throw new Error('boom boom');
}
});
// error handler
app.on('error', function(err){
console.log('sent error %s to the cloud', err.message);
});
app.listen(3000);