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April 1, 2015 02:12
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Javascript: REST Level 2 w/Status Codes example (Nettuts: How to Build a Hypermedia-Driven REST API)
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| var express = require('express'); | |
| var app = express(); | |
| var Datastore = require('nedb'); | |
| var db = {}; | |
| var responder = require('./httpResponder'); | |
| var port = process.argv[2] || 3050; | |
| var root = 'http://localhost:' + port; | |
| // Connect to an NeDB database | |
| db.movies = new Datastore({ filename: 'db/movies', autoload: true }); | |
| // add an index | |
| db.movies.ensureIndex({ fieldName: 'title', unique: true }); | |
| // Necessary for accessing POST data via req.body object | |
| app.use(express.bodyParser()); | |
| // Catch-all route to set global values | |
| app.use(function (req, res, next) { | |
| res.type('application/json'); | |
| res.locals.respond = responder.setup(res); | |
| next(); | |
| }); | |
| // Routes | |
| app.get('/', function (req, res) { | |
| res.send('The API is working.'); | |
| }); | |
| app.get('/movies', function (req, res) { | |
| db.movies.find({}, res.locals.respond); | |
| }); | |
| app.post('/movies', function (req, res) { | |
| // handle client error | |
| // http://www.screencast.com/t/iJImQ3qEF | |
| if (!req.body.title) { | |
| res.json(400, { error: { message: 'A title is required to create new movie.' } }); | |
| return; | |
| } | |
| // handle server error | |
| // http://www.screencast.com/t/p0vQW0fTVHEg | |
| db.movies.insert({ title: req.body.title }, function (err, created) { | |
| if (err) { | |
| res.json(500, { error: err }); | |
| return; | |
| } | |
| // set location header | |
| // http://www.screencast.com/t/C6jvMPAekaRU | |
| res.set('Location', root + '/movies/' + created._id); | |
| res.json(201, created); | |
| }); | |
| }); | |
| app.get('/movies/:id', function (req, res) { | |
| db.movies.findOne({ _id: req.params.id }, function (err, result) { | |
| if (err) { | |
| res.json(500, { error: err }); | |
| return; | |
| } | |
| if (!result) { | |
| res.json(400, { error: { message: 'We did not find a movie with id: ' + req.params.id } }); | |
| return; | |
| } | |
| res.json(200, result); | |
| }); | |
| }); | |
| app.put('/movies/:id', function (req, res) { | |
| db.movies.update({ _id: req.params.id }, req.body, function (err, num) { | |
| res.locals.respond(err, { success: num + " records updated" }); | |
| }); | |
| }); | |
| app.delete('/movies/:id', function (req, res) { | |
| db.movies.remove({ _id: req.params.id }, function (err, num) { | |
| if (err) { | |
| res.json(500, { error: err }); | |
| return; | |
| } | |
| if (num === 0) { | |
| res.json(404, { error: { message: 'We did not find a movie with id: ' + req.params.id } }); | |
| return; | |
| } | |
| // http://www.screencast.com/t/A3KdbpNJ | |
| res.set('Link', root + '/movies; rel="collection"'); | |
| res.send(204); | |
| }); | |
| }); | |
| app.listen(port); |
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