How to allow users to login protected flask-rest-api in Angularjs using HTTP Authentication?

Question

Guys If My Question is not clear please comment below.

Basic HTTP Authentication for REST API in flask+angularjs

I just want to login to the flask-rest-api in angularjs, I don't know how to send the login info (username and password)to flask-rest-api. In this app There is one table after successfully login and it will load the data. Here we are not using any data-base but username and password is hard-coded in rest-server code. and username="admin" and password="1234". When can modify, update, addNewData. I took this from this blog, here they are using in knockout, I am trying to in Angularjs

Login form

<div id="login" class="modal hide fade" tabindex="=1" role="dialog" aria-labelledby="loginLabel" aria-hidden="true">
        <div class="modal-header">
            <h3 id="loginLabel">Sign In</h3>
        </div>
        <div class="modal-body">
            <form class="form-horizontal">
                <div class="control-group">
                    <label class="control-label" for="inputUsername">Username</label>
                    <div class="controls">
                        <input ng-model="username" type="text" id="inputUsername" placeholder="Username">
                    </div>
                </div>
                <div class="control-group">
                    <label class="control-label" for="inputPassword">Password</label>
                    <div class="controls">
                        <input ng-model="password" type="password" id="inputPassword" placeholder="Password">
                    </div>
                </div>
            </form>
        </div>
        <div class="modal-footer">
            <button ng-click="submitData(username, password)" class="btn btn-primary" data-dismiss="modal" aria-hidden="true">Sign In</button>
        </div>
    </div>

HTML Code Which call Login Model

<div class="navbar">
      <div class="navbar-inner">
        <a class="btn" data-toggle="modal" data-target="#login">Login</a>
      </div>
</div>

AngulurJS code

<script>

                    var app = angular.module('myApp', []);
                    app.controller('tasksCtrl', function($scope, $http) {
                        $scope.submitData=function(username, password){
                            var config={
                               params:{
                                   username:username, password:password
                               }
                            };
                        };
                        //$http.get("data.json")
                        $http.get("/todo/api/v1.0/tasks")
                        .success(function(response) {
                            console.log(response.tasks)
                            $scope.tasks = response.tasks;
                        });

                        $scope.editTask = function(task) {
                            $scope.selectedTask = task;
                        };
                        $scope.removeRow = function(task) {
                            $scope.tasks.splice(task, 1);
                        };
                        $scope.addNewTask = function() {
                            //$scope.tasks.push({title :$scope.task1,description: $scope.description1});
                            $scope.tasks.push({title: $scope.task1, description: $scope.description1});
                            $scope.task1 = '';
                            $scope.description1 = '';
                            //   $scope.tasks.push('dhsh');
                        };
                    });    
        </script>

REST-API-SERVER

import six
from flask import Flask, jsonify, abort, request, make_response, url_for, render_template 
from flask.ext.httpauth import HTTPBasicAuth

app = Flask(__name__, static_url_path="")
auth = HTTPBasicAuth()


@auth.get_password
def get_password(username):
    if username == 'admin':
        return '1234'
    return None


@auth.error_handler
def unauthorized():
    return make_response(jsonify({'error': 'Unauthorized access'}), 403)


@app.errorhandler(400)
def bad_request(error):
    return make_response(jsonify({'error': 'Bad request'}), 400)


@app.errorhandler(404)
def not_found(error):
    return make_response(jsonify({'error': 'Not found'}), 404)


tasks = [
    {
        'id': 1,
        'title': u'Buy groceries',
        'description': u'Milk, Cheese, Pizza, Fruit, Tylenol',
        'done': False
    },
    {
        'id': 2,
        'title': u'Learn Python',
        'description': u'Need to find a good Python tutorial on the web',
        'done': False
    }
]


def make_public_task(task):
    new_task = {}
    for field in task:
        if field == 'id':
            new_task['uri'] = url_for('get_task', task_id=task['id'],
                                      _external=True)
        else:
            new_task[field] = task[field]
    return new_task

@app.route('/')
@auth.login_required
def index():
   return render_template('index.html')

@app.route('/todo/api/v1.0/tasks', methods=['GET'])
@auth.login_required
def get_tasks():
    return jsonify({'tasks': [make_public_task(task) for task in tasks]})


@app.route('/todo/api/v1.0/tasks/<int:task_id>', methods=['GET'])
@auth.login_required
def get_task(task_id):
    task = [task for task in tasks if task['id'] == task_id]
    if len(task) == 0:
        abort(404)
    return jsonify({'task': make_public_task(task[0])})


@app.route('/todo/api/v1.0/tasks', methods=['POST'])
@auth.login_required
def create_task():
    if not request.json or 'title' not in request.json:
        abort(400)
    task = {
        'id': tasks[-1]['id'] + 1,
        'title': request.json['title'],
        'description': request.json.get('description', ""),
        'done': False
    }
    tasks.append(task)
    return jsonify({'task': make_public_task(task)}), 201


@app.route('/todo/api/v1.0/tasks/<int:task_id>', methods=['PUT'])
@auth.login_required
def update_task(task_id):
    task = [task for task in tasks if task['id'] == task_id]
    if len(task) == 0:
        abort(404)
    if not request.json:
        abort(400)
    if 'title' in request.json and \
            not isinstance(request.json['title'], six.string_types):
        abort(400)
    if 'description' in request.json and \
            not isinstance(request.json['description'], six.string_types):
        abort(400)
    if 'done' in request.json and type(request.json['done']) is not bool:
        abort(400)
    task[0]['title'] = request.json.get('title', task[0]['title'])
    task[0]['description'] = request.json.get('description',
                                              task[0]['description'])
    task[0]['done'] = request.json.get('done', task[0]['done'])
    return jsonify({'task': make_public_task(task[0])})


@app.route('/todo/api/v1.0/tasks/<int:task_id>', methods=['DELETE'])
@auth.login_required
def delete_task(task_id):
    task = [task for task in tasks if task['id'] == task_id]
    if len(task) == 0:
        abort(404)
    tasks.remove(task[0])
    return jsonify({'result': True})


if __name__ == '__main__':
    app.run(debug=True)

Answer 1

The way you make basic authentication from client side is by supplying Authorization: Basic <encoded username:password> header in HTTP request.

encoded username:password is done in specific manner described below:

1. Username and password are combined into a string "username:password"
2. The resulting string is then encoded using the RFC2045-MIME variant of Base64, except not limited to 76 char/line[9]

So modify your rest calls to include above header in your Angularjs code or find a library to do that.

as @Boris mentioned in comments above, see this link http://jasonwatmore.com/post/2014/05/26/AngularJS-Basic-HTTP-Authentication-Example.aspx it has nice Angular service written to do just what you want