latest version

.gitignore

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+.DS_Store
+*.swp
+*.swo
+node_modules
+_SpecRunner.html

.jshintrc

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+{
+    "predef": [
+        "sinon",
+        "before",
+        "after",
+        "it",
+        "xit",
+        "describe",
+        "expect",
+        "beforeEach",
+        "afterEach",
+        "spyOn",
+        "waits",
+        "waitsFor",
+        "runs",
+        "_",
+        "sba",
+        "Backbone",
+        "jasmine",
+        "afterEach"
+    ],
+
+    "node" : true,
+    "browser" : true,
+    "jquery" : true,
+    "boss" : false,
+    "curly": true,
+    "debug": false,
+    "devel": false,
+    "eqeqeq": true,
+    "evil": false,
+    "forin": false,
+    "immed": true,
+    "laxbreak": false,
+    "newcap": true,
+    "noarg": true,
+    "noempty": false,
+    "nonew": true,
+    "onevar": false,
+    "plusplus": false,
+    "multistr": true,
+    "regexp": false,
+    "undef": true,
+    "sub": false,
+    "strict": false,
+    "bitwise" : true,
+    "curly" : true,
+    "latedef" : false,
+    "noarg" : true,
+    "trailing" : true,
+    "asi" : false,
+    "expr": true
+}

app.js

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+// Implements an in-memory server for Backbone.js
+// http://documentcloud.github.com/backbone/#Sync
+
+var express = require('express'),
+    app = express(),
+    idCounter = 0,
+    data = {},
+    port = 3002,
+    _ = require('underscore');
+
+app.configure(function () {
+    app.use(express.bodyParser());
+    app.use(allowCrossDomain);
+    app.use(express.static(__dirname + '/public'));
+});
+
+app.get('/', function(req, res) {
+    res.sendfile('public/index.html');
+});
+
+app.get('/tests', function(req, res) {
+    res.sendfile('public/tests.html');
+});
+
+app.get("/:collection", function(req, res) {
+    console.log('read ' + req.params.collection);
+    if (!data[req.params.collection]) {
+        return res.send(404);
+    }
+
+    data[req.params.collection] = data[req.params.collection] || [];
+    res.send(data[req.params.collection]);
+});
+
+// create -> POST /collection
+app.post('/:collection', function(req, res){
+    console.log('create ' + req.params.collection);
+    console.log(req.body);
+    req.body.id = idCounter++;
+    data[req.params.collection] = data[req.params.collection] || [];
+    data[req.params.collection].push(req.body);
+    res.send({ id: req.body.id });
+});
+
+// read -> GET /collection[/id]
+app.get('/:collection/:id?', function (req,res) {
+    console.log('read ' + (req.params.id || ('collection ' + req.params.collection)));
+
+    if (data[req.params.collection] && !req.params.id) {
+        return res.send(data[req.params.collection]);
+    }
+
+    var model = findModel(req.params.collection, req.params.id);
+    if (!model && req.params.id) {
+        return res.send('cant find model ' + req.params.id, 404);
+    }
+    res.send(model);
+});
+
+// update -> PUT /collection/id
+app.put('/:collection/:id', function (req,res) {
+    console.log('update ' + req.params.collection + ' - ' + req.params.id);
+    removeModel(req.params.collection, req.params.id);
+    data[req.params.collection].push(req.body);
+    res.send(200);
+});
+
+// delete -> DELETE /collection/id
+app.delete('/:collection/:id', function (req,res) {
+    console.log('delete ' + req.params.collection + ' - ' + req.params.id);
+    removeModel(req.params.collection, req.params.id);
+    res.send(200);
+});
+
+app.listen(port);
+console.log('Backbone-server started at port %d.', port);
+
+function removeModel(collection, id) {
+    if (!data[collection]) {
+        console.log('cant find collection ' + collection);
+        return;
+    }
+    data[collection] = _(data[collection]).reject(function (model) {
+        return model.id === parseInt(id, 10);
+    });
+}
+
+function findModel(collection, id) {
+    if (!data[collection]) {
+        console.log('cant find collection ' + collection);
+        return;
+    }
+    return _(data[collection]).find(function (m) {
+        return m.id === parseInt(id, 10);
+    });
+}
+
+function allowCrossDomain(req, res, next) {
+    res.header('Access-Control-Allow-Origin', '*');
+    res.header('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE');
+    res.header('Access-Control-Allow-Headers', 'Content-Type');
+
+    next();
+}

package.json

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+{
+  "name": "application-name",
+  "version": "0.0.1",
+  "private": true,
+  "scripts": {
+    "start": "node app"
+  },
+  "dependencies": {
+    "express": "3.0.0rc4",
+    "jade": "*"
+  }
+}