POST, PUT, DELETE requests from AngularJS $http/AJAX to Node.js + Express.js based API

Question

I wrote backend API on Node.js and Express.js v4, this part (index.js):

app.use(function (req, res, next) {
    res.setHeader('Access-Control-Allow-Origin', 'http://example.com');
    res.setHeader('Access-Control-Allow-Methods', 'GET, POST, OPTIONS, PUT, PATCH, DELETE');
    res.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
    res.setHeader('Access-Control-Allow-Credentials', true);
    next();
});

app.post('/add1', function (req, res) {
    db.one("INSERT INTO table(value1) VALUES (${value1}) RETURNING ID", req.query).then(function (data) {
        res.json(data);
    }).catch(function (error) {
        res.json(error);
    });
});

app.put('/add2', function (req, res) {
    db.one("INSERT INTO table(value1) VALUES (${value1}) RETURNING ID", req.query).then(function (data) {
        res.json(data);
    }).catch(function (error) {
        res.json(error);
    });
});

app.get('/add3', function (req, res) {
    db.one("INSERT INTO table(value1) VALUES (${value1}) RETURNING ID", req.query).then(function (data) {
        res.json(data);
    }).catch(function (error) {
        res.json(error);
    });
});

And I have Angular JS or sample ajax like this

app.controller('globalController', function($scope, $http) {
    var jsd = {};
    jsd.value1=1;
    $http.put(API_URL + 'add2', jsd).then(function(data) {
        console.log(data);
    }, function(data) {
        console.log(data);
    });
});

and

$.ajax({
            url: API_URL + 'add1',
            method: 'POST',
            dataType: 'json',
            data: jsond,
            success: function(data) {
                console.log(data);
            },
            error: function(data) {
                console.log(data);
            }
        });

But I don't recive any data to my req.query and in generally in req object. When I make my AJAX request to add3 with get, then all works, req.query has my params.

I read about this solution:

app.config(function ($httpProvider) {
        $httpProvider.defaults.transformRequest = function(data){
            if (data === undefined) {
                return data;
            }
            return $.param(data);
        };
        $httpProvider.defaults.headers.put['Content-Type'] = 'application/x-www-form-urlencoded; charset=UTF-8';
    });

and solution here

var multer = require("multer");

//...

var upload = multer({ dest: "./upload/" });
app.post("/post", upload.array(), function(req, res) {
    console.log(req.body);
    res.send(null);
}

I tried first, not works, and second is too strange solution (I can't save data to files and etc.) I think problem was in fist OPTION request, but I googled it, not found solution. I need little example (working code) how I can send POST or PUT data from Angular $http or AJAX and use this data in req object in node.js. In GET requests all this works, but how I can make it work on others?

Answer 1

Which version of Express are you using? It's possible that you're writing the old way and using the new version.

You might wanna check this out -- How to retrieve POST query parameters?

Anyway, I'd suggest you use ngResource for making REST HTTP calls in Angular.

1. Instantiate the Factory This will expose a few methods eg query , save etc.

 angular .module('MyModule') .factory('AddEndpoint', AddEndpoint); AddEndpoint.$inject = ['$resource']; function AddEndpoint($resource) { return $resource(API_URL + '/:param', { param: '@param' }); } 

2. Enjoy The Factory

 angular .module('MyModule') .controller('MyController', MyCtrl) MyCtrl.$inject = ['AddEndpoint']; function MyCtrl(AddEndpoint) { var scope = this; scope.getFromApi = AddEndpoint.get({ params: 'add1' }); // GET 'API_URL/add1' scope.postToApi = postToApi; function postToApi(data) { data.params: 'add2' AddEndpoint.save(data); // POST to 'API_URL/add2' } }