How do you send x-www-form-urlencoded data with Angular $resource?

Question

I am trying to submit a POST request to a server which only accepts the data in the x-www-form-urlencoded format.

When I test it out on Postman, it works. For example, the preview header looks like:

    POST /api/signin HTTP/1.1
    Host: myproj.herokuapp.com
    Cache-Control: no-cache
    Content-Type: application/x-www-form-urlencoded

    email=joe%40gmail.com&password=1234567

However, when I run it from my app, the header, as viewed in Chrome console, looks like:

    Remote Address:10.10.10.250:80
    Request URL:http://myproj.herokuapp.com/api/signIn
    Request Method:POST
    Status Code:400 Bad Request
    Request Headersview source
    Accept:application/json, text/plain, */*
    Accept-Encoding:gzip, deflate
    Accept-Language:en-US,en;q=0.8
    Connection:keep-alive
    Content-Length:53
    Content-Type:application/x-www-form-urlencoded; charset=UTF-8
    Host:rapidit.herokuapp.com
    Origin:http://localhost
    Referer:http://localhost/rapid/v3/src/app/index/
    User-Agent:Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.71 Safari/537.36
    Form Dataview parsed
    {"email":"[email protected]","password":"1234567"}

Clearly, it's not sending the data in the right format.

This is what it looks like in my Angular factory (with hardcoded login data):

var LoginResource = $resource("http://myproj.herokuapp.com/api/signIn", {}, {
         post: {
            method: "POST",
            isArray: false,
            headers: {'Content-Type':'application/x-www-form-urlencoded; charset=UTF-8'}
        }
    });
    var loginUser = function (){
        return LoginResource.post( 
            {
                email: "[email protected]", 
                password: "1234567" 
            }
            ).$promise; //this promise will be fulfilled when the response is retrieved for this call
    };
    return loginUser;

How can I get the data to POST in the required format?

Answer 1

By default Angular uses application/json and it's not enough to set the header to form url encode, you have to actually transform the data, you can do that by using de transformRequest option on the $resource service. This is how it looks like.

angular.module("AuthModule")
.factory("authResource", ['$resource', 'appSettings', function ($resource, appSettings) {

    return {
        login: $resource(appSettings.serverPath + '/Token', null,
           {
               loginUser: {
                   method: 'POST',
                   headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
                   transformRequest: function (data, headersGetter) {
                       var str = [];
                       for (var d in data)
                           str.push(encodeURIComponent(d) + "=" + encodeURIComponent(data[d]));
                       return str.join("&");
                   }
               },
           })
    }

}]);

P/D: I didn't write this. This code was taken from a pluralsight's course, called Angular Front to Back with Web API.