How I get & validate the username and password in SQL Management using API?

问题

I created my login page and i want to validate the username and password. Then i need to get the user details using API from the database. please send me a coding using ionic-3 and angular-2.

I already tried in my SQL. But i want it in SQL management. In the below coding i send the parameters using post method and it will get at back end and validate with already registered username and password.

Username: any;
Password: any;

data:string;

constructor(  ){}
 //declaration of object//

   var headers = new Headers();

  headers.append('Accept', 'application/json');

  headers.append('Content-Type', 'application/json' );

  let option = new RequestOptions({headers: headers });

let data = {

  username: this.Username.value,

  password: this.Password.value

  };

  let loader = this.loading.create({

   spinner: 'bubbles',
   duration: 1000
  });

  //API call//
  loader.present().then(() => {

  this.http.post('')

  .map(res => res.json())

  .subscribe(res => {

  console.log(res)

  loader.dismiss()

  if(res=="Your Login Success"){

  let alert = this.altCtrl.create({

  title:"CONGRATS",

  subTitle:(res),

  buttons: ['OK']

  });

  alert.present().then(()=>
  this.navCtrl.push(NextPage));

  }
  else{

  let alert = this.altCtrl.create({

  title:"ERROR",

  subTitle:"Your Login Username or Password is invalid",

  buttons: ['OK']

  });

  alert.present();

  }

  },(err) => {

  });

  });

  }

I expect if the username or password is wrong it should show alert "username or password incorrect". in else it will push to the next page with "your login success".

回答1:

You should do something like this:

in your Login.ts

let loginObject = {
   username: userInputValueFromUsername
   password: userInputValueFromPassword
} 

this.headers = {'Content-Type':'application/json'}; // set Headers for the Request
this.http.post('https://somew-url.com/api/login', JSON.stringify(loginObject), {headers: this.headers})
       .subscribe(data => {
         console.log(data);
          if (data.success == true) {
              //push to new Page
          }
          else{
          // Show Error
          }
      });

来源：https://stackoverflow.com/questions/57175512/how-i-get-validate-the-username-and-password-in-sql-management-using-api

标签

sql

ionic3

angular2-forms