i399exexpress/examples/express6.js

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JavaScript
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2017-05-09 15:42:06 +03:00
'use strict';
const express = require('express');
const app = express();
app.get('/api/p1', p1);
app.get('/api/p2', p2);
app.use(errorHandler); // after request handlers
app.listen(3000, () => console.log('Server is running...'));
function p1(request, response, next) {
getData()
.then(data => response.end('ok: ' + data))
.catch(error => next(error));
}
function p2(request, response, next) {
getDataFails()
.then(data => response.end(data))
.catch(next);
}
function errorHandler(error, request, response, next) { // there must be 4 arguments
response.status(500).send('error: ' + error.toString());
}
function getData() {
return Promise.resolve('some data');
}
function getDataFails() {
return Promise.reject('some error');
}