Ionic 3 and Angular 4: PHP Restful API User Authentication for Login and Signup.
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Thursday, June 22, 2017

Ionic 3 and Angular 4: PHP Restful API User Authentication for Login and Signup.

Here is the continued article on my previous post for creating a welcome page with login and logout. Today’s post explains how to implement login authentication system for your AngularJS applications. It will show you how to log in with a user and store the user session, so it deals with token based authentication. Since we are using token based authentication, it protects if any unauthorized request is made and notices for a new login if required. This makes your application’s authentication to be more secured compared with any other authentication system. Every user details will be stored in an external database and a PHP based API is used in the backend for handling this authentication. Hope you’ll find it more easily using this as your authentication system in your AngularJS projects. Let’s look into the live demo and follow the below code.

Ionic 3 and Angular 4:Login and Signup with PHP Restful API.


Live Demo


Video Tutorial
Ionic 3 and Angular 4: PHP Token Based Restful API User Authentication Login and Signup.


Database Design
To build the user feed system, you have to create two tables such as Users and Feed. You can check my previous tutorials for creating token-based API system.

Users
User table contains all the users registration details.
CREATE TABLE users(
user_id int AUTO_INCREMENT PRIMARY KEY,
username varchar(50),
password varchar(300),
name varchar(200),
email varchar(300));

Feed
This table contains user daily updates.
CREATE TABLE feed(
feed_id int PRIMARY KEY AUTO_INCREMENT,
feed text,
user_id_fk int
);

Download PHP Restul Project
$git clone https://github.com/srinivastamada/PHP-Slim-Restful.git


Create an Authenstication Service Provider
You have to create an injectable component for API autentication. The following ionic command help you to create files automatically.
$ionic g provider authService

app.module.ts
Now go to src/app/app.module.ts and import authService provider and HttpModule.
Now got src/app/app.module.ts and import Welcome, Login and Signup pages.
import { NgModule, ErrorHandler } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { HttpModule } from '@angular/http';
import { IonicApp, IonicModule, IonicErrorHandler } from 'ionic-angular';
import { MyApp } from './app.component';
import { MyApp } from './app.component';
import { AuthService } from '../providers/auth-service';
import { Welcome } from '../pages/welcome/welcome';
import { Login } from '../pages/login/login';
import { Signup } from '../pages/signup/signup';
import { AboutPage } from '../pages/about/about';
import { ContactPage } from '../pages/contact/contact';
import { HomePage } from '../pages/home/home';
import { TabsPage } from '../pages/tabs/tabs';
import { StatusBar } from '@ionic-native/status-bar';
import { SplashScreen } from '@ionic-native/splash-screen';

@NgModule({
  declarations: [
    MyApp,
    AboutPage,
    ContactPage,
    HomePage,
    Welcome,
    Login,
    Signup,
    TabsPage
  ],
  imports: [
    BrowserModule, HttpModule
    IonicModule.forRoot(MyApp)
  ],
  bootstrap: [IonicApp],
  entryComponents: [
    MyApp,
    AboutPage,
    ContactPage,
    HomePage,
    Welcome,
    Login,
    Signup,
    TabsPage
  ],
  providers: [
    StatusBar,
    SplashScreen, AuthService,
    {provide: ErrorHandler, useClass: IonicErrorHandler}
  ]
})
export class AppModule {}

authService.ts
Include post data function for HTTP post access. You will understand more in the youtube video.
import {Injectable} from '@angular/core';
import {Http, Headers} from '@angular/http';
import 'rxjs/add/operator/map';

let apiUrl = 'http://yourdomain.com/PHP-Slim-Restful/api/';

@Injectable()
export class AuthService {

  constructor(public http : Http) {
    console.log('Hello AuthService Provider');
  }

  postData(credentials, type) {
    return new Promise((resolve, reject) => {
      let headers = new Headers();

      this.http.post(apiUrl + type, JSON.stringify(credentials), {headers: headers})
        .subscribe(res => {
          resolve(res.json());
        }, (err) => {
          reject(err);
        });
    });

  }

}

signup.ts
Here you have to import AuthService provider and implement with user signup data. Once the API call is succesful, the user data storing into application local storage with accessing data key call userData.
import { Component } from '@angular/core';
import {  NavController} from 'ionic-angular';
import { TabsPage } from '../tabs/tabs';
import { LoginPage } from '../login/login';
import { AuthService } from '../../providers/auth-service';

@Component({
  selector: 'page-signup',
  templateUrl: 'signup.html',
})
export class SignupPage {
  responseData : any;
  userData = {"username": "","password": "", "name": "","email": ""};

  constructor(public navCtrl: NavController, public authService:AuthService ) {
  }

  signup(){
     this.authService.postData(this.userData,'signup').then((result) => {
      this.responseData = result;
      console.log(this.responseData);
      localStorage.setItem('userData', JSON.stringify(this.responseData));
      this.navCtrl.push(TabsPage);
    }, (err) => {
      // Error log
    });

  }

  login(){
    //Login page link
    this.navCtrl.push(LoginPage);
  }
}

signup.html
Bind the userDetails object with form inputs.
<ion-content padding class="appBackground">
  <ion-card>
    <ion-card-header>
      Registration
    </ion-card-header>
    <ion-card-content>
      <ion-list>
        <ion-item>
          <ion-label stacked>Name</ion-label>
          <ion-input type="text" [(ngModel)]="userData.name"></ion-input>
        </ion-item>

        <ion-item>
          <ion-label stacked>Email</ion-label>
          <ion-input type="text" [(ngModel)]="userData.email"></ion-input>
        </ion-item>

        <ion-item>
          <ion-label stacked>Username</ion-label>
          <ion-input type="text" [(ngModel)]="userData.username"></ion-input>
        </ion-item>

        <ion-item>
          <ion-label stacked>Password</ion-label>
          <ion-input type="password" [(ngModel)]="userData.password"></ion-input>
        </ion-item>

        <button ion-button full color="success" (click)="signup()">Sign up</button>
        <a href="#" (click)="login()">Login Page</a>
      </ion-list>
    </ion-card-content>
  </ion-card>
</ion-content>

login.ts
You have to follow the same like signup module.

home.ts
Reading the application local storage data and binding with userDetails. Logout function is clearing the local storage data and redirecting to the welcome page with time deplay option.
import { Component } from '@angular/core';
import { NavController } from 'ionic-angular';
import { AuthService } from '../../providers/auth-service';
@Component({
  selector: 'page-home',
  templateUrl: 'home.html'
})

export class HomePage {

  userDetails : any;
  responseData: any;
 
  userPostData = {"user_id":"","token":""};

  constructor(public navCtrl: NavController, public authService:AuthService) {
  const data = JSON.parse(localStorage.getItem('userData'));
  this.userDetails = data.userData;

  this.userPostData.user_idthis.userDetails.user_id;
  this.userPostData.tokenthis.userDetails.token;

}

backToWelcome(){
   const root = this.app.getRootNav();
   root.popToRoot();
}

logout(){
     localStorage.clear();
     setTimeout(() => this.backToWelcome(), 1000);
}

}

home.html
Binding the local storage data with HTML template.
<ion-header>
  <ion-navbar>
    <img ion-right src="assets/imgs/bananalogo.png" class="navbarLogo" />
    <ion-title>Home</ion-title>
  </ion-navbar>
</ion-header>

<ion-content padding>
  <h2>Welcome to {{userDetails.name}}</h2>
  <h3>Email: {{userDetails.email}}</h3>
  <button ion-button color="primary" (click)="logout()">Logout</button>
</ion-content>

Build iOS App
Following commands for executing Xcode build, watch the video tutorial you will understand more.
$ cordova platform add ios
$ ionic build ios

Build Android App
Open Android build using Android SDK>
cordova platform add android
ionic build android

Previous Video Tutorial
Ionic 3 and Angular 4 Create a Welcome Page with Login and Logout.



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45 comments:

  1. could you just make upload Ionic 3 and Angular 4 json parsing Example and Push Notification pls.
    Thanks
    -Sapan

    ReplyDelete
  2. This is video too much helpfull and work for me
    Thanks
    -sapan

    ReplyDelete
  3. your tutorials helping to me lot, thanks

    ReplyDelete
  4. why there is not error message if i use random account

    ReplyDelete
  5. Error: this.userDetails is undefined

    ReplyDelete
    Replies
    1. Clear your browser local storage. Go to developer tools -> application -> Clear Site Data

      Delete
    2. Thank you so much. Ok After log in, user can insert some details to other table How can we do ... can you please help me ? like want to insert feed data from ionic.

      Delete
    3. Hi Srinivas, some how I've done inserting data from ionic.
      One thing I want to know how to display toast msg when same user signup like "user already existed" ?

      Delete
  6. {"error":{"text":"Enter valid data"}}

    ReplyDelete
  7. am also getting this error {"error":{"text":"Enter valid data"} please help.!

    ReplyDelete
  8. The video is very helpful. Thanks for the share

    ReplyDelete
  9. Help!!
    XMLHttpRequest cannot load http://192.168.1.10/slimrest/index.php/login. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:8100' is therefore not allowed access.

    ReplyDelete
    Replies
    1. I was error too, u did edit it ? Can u help me?

      Delete
  10. ERROR DOMException [NetworkError: "A network error occurred."
    code: 19
    nsresult: 0x80530013
    location: http://localhost:8100/build/polyfills.js:3]

    ReplyDelete
  11. Have an example of registration With SMS code using Restfull API??

    ReplyDelete
  12. i got this error:

    Property 'app' does not exist on type 'HomePage'

    please help

    ReplyDelete
    Replies
    1. import { App, NavController } from 'ionic-angular';

      constructor(public navCtrl: NavController, public appCtrl: App, public authService:AuthService)

      const root = this.appCtrl.getRootNav();

      Delete
  13. {error: {…}}error: text: "Enter valid data" iam getting error while signup

    ReplyDelete
    Replies
    1. Do you fix it? i am getting the same error!!

      Delete
  14. hi, when i'm submitting the form using yours api module, then we get an error of "XMLHttpRequest cannot load http://mywebsite.com/Home/Login. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:8100' is therefore not allowed access."

    my api is build in .net , so can you help me, coz im new to ionic

    ReplyDelete
  15. hi , im new to ionic so i'll see your video, then apply same on my project, but when we run the postData function it returns "XMLHttpRequest cannot load http://mywebsite.com/Home/Login. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:8100' is therefore not allowed access."

    and this API is made on .NET

    ReplyDelete
  16. This comment has been removed by the author.

    ReplyDelete
  17. Work like Charm, i have learnt a lot from it greatly, thanks

    ReplyDelete
  18. never mind my previous comment requesting help on alertbox. i got it working :D

    ReplyDelete
    Replies
    1. @CJD, kindly show how you fixed it. Thanks

      Delete
  19. hello sir. please i am getting this error upon signup. my tabs page is not showing and my signup datas are storing into my database.

    Runtime Error
    Unexpected token < in JSON at position 0
    Stack
    SyntaxError: Unexpected token < in JSON at position 0
    at JSON.parse ()
    at Response.Body.json (http://localhost:8100/build/vendor.js:66426:25)
    at SafeSubscriber._next (http://localhost:8100/build/main.js:324:29)
    at SafeSubscriber.__tryOrUnsub (http://localhost:8100/build/vendor.js:36172:16)
    at SafeSubscriber.next (http://localhost:8100/build/vendor.js:36119:22)
    at Subscriber._next (http://localhost:8100/build/vendor.js:36059:26)
    at Subscriber.next (http://localhost:8100/build/vendor.js:36023:18)
    at XMLHttpRequest.onLoad (http://localhost:8100/build/vendor.js:66855:38)
    at t.invokeTask (http://localhost:8100/build/polyfills.js:3:9967)
    at Object.onInvokeTask (http://localhost:8100/build/vendor.js:4499:37)

    ReplyDelete
  20. What happens when you start the session in two devices?

    ReplyDelete
  21. Hi Srinivas i have two errors,
    one is when i try to register a user and show me a error:
    "{error: {…}}error: text: "Enter valid data"

    and two, i register a user in mysql and trying to login show me this error

    "Bad request wrong username and password"

    can you help me please? i'm trying to understand web services
    Greetings

    ReplyDelete
    Replies
    1. Hi, Look like you haven't completed the registration process. Give valid information and try, you will get inserted user information data set.

      Delete
  22. SyntaxError: Unexpected end of JSON input

    ReplyDelete
  23. How to get details of user after login using token value.... thanks....

    ReplyDelete
    Replies
    1. Take a look at this link https://www.9lessons.info/2017/07/ionic-angular-JSON-parsing-json-APIs.html

      Delete
  24. Hai sir, I get error {"error":{"text":"Enter valid data"}} while i try signup function . please help !

    ReplyDelete
  25. Hi, I am new. Where do I physically store the api files?

    ReplyDelete
  26. Hi! Where do I store the api files?

    ReplyDelete
    Replies
    1. Install XAMPP(Apache PHP MySQL) server and copy api file in htdocs folder.

      Delete
  27. Hi sir,
    This code error after i m update cordove to version 7.1.0 :

    Typescript Error
    Argument of type '{ headers: Headers; }' is not assignable to parameter of type 'RequestOptionsArgs'. Types of property 'headers' are incompatible. Type 'Headers' is not assignable to type 'Headers'. Two different types with this name exist, but they are unrelated. Property 'keys' is missing in type 'Headers'.
    D:/ionic/ionic-welcome/src/providers/auth-service/auth-service.ts
    this.http.post(apiUrl + type, JSON.stringify(credentials), {headers: headers})
    .subscribe(res => {

    ReplyDelete
  28. Hi Sir,
    Error when build or run on android device

    ReplyDelete
  29. hi sir,
    i like yours lessons. thanks so much.
    My question is; what is your text editor software you are using to open projet?
    Thanks so much

    ReplyDelete
  30. when i use setTimeout function .. no action perform :(

    ReplyDelete

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