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express
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examples/params/index.js
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Shahan Arshad
refactor: improve readability (#6173)
27 ноя 2024, 23:22
Не верифицирован
27 ноя 2024, 23:22
e4a61bd
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'use strict' /** * Module dependencies. */ var createError = require('http-errors') var express = require('../../'); var app = module.exports = express(); // Faux database var users = [ { name: 'tj' } , { name: 'tobi' } , { name: 'loki' } , { name: 'jane' } , { name: 'bandit' } ]; // Convert :to and :from to integers app.param(['to', 'from'], function(req, res, next, num, name){ req.params[name] = parseInt(num, 10); if( isNaN(req.params[name]) ){ next(createError(400, 'failed to parseInt '+num)); } else { next(); } }); // Load user by id app.param('user', function(req, res, next, id){ req.user = users[id] if (req.user) { next(); } else { next(createError(404, 'failed to find user')); } }); /** * GET index. */ app.get('/', function(req, res){ res.send('Visit /user/0 or /users/0-2'); }); /** * GET :user. */ app.get('/user/:user', function (req, res) { res.send('user ' + req.user.name); }); /** * GET users :from - :to. */ app.get('/users/:from-:to', function (req, res) { var from = req.params.from; var to = req.params.to; var names = users.map(function(user){ return user.name; }); res.send('users ' + names.slice(from, to + 1).join(', ')); }); /* istanbul ignore next */ if (!module.parent) { app.listen(3000); console.log('Express started on port 3000'); }