Security Specific Routes in Angular Spring Boot App

Tiếp theo bài trước: Custom Security to Angular Spring Boot App.
Thêm controller class:

package com.example.springangularfrontendserver.controller;


import java.security.Principal;
import java.util.Map;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;


@RestController
@RequestMapping("banking")
public class BankingController {


    // GET /banking/transfer?account=Bob&amount=100
    @GetMapping("transfer")
    public Map<String, Object> transfer(
        Principal user,
        @RequestParam Map<String, String> params
    ) {
        String from = user.getName();
        String to = params.get("account");
        Integer amount = Integer.parseInt(params.get("amount"));


        System.out.printf("Sending $%d from %s to %s\n", amount, from, to);


        return Map.of(
            "from", from,
            "to", to,
            "amount", amount
        );
    }


    // POST /banking/transfer
    //
    // {
    //      "account": "Bob",
    //      "amount": 100
    //  }
    @PostMapping("transfer")
    public Map<String, Object> transferPost(
        Principal user,
        @RequestBody Map<String, String> body
    ) {
        String from = user.getName();
        String to = body.get("account");
        Integer amount = Integer.parseInt(body.get("amount"));


        System.out.printf("Sending %d from %s to %s using POST request\n", amount, from, to);


        return Map.of(
            "from", from,
            "to", to,
            "amount", amount
        );
    }
}

Frontend code:
app.component.html

<h1>Welcome to Our Bank</h1>
<h3 style="text-align: center">Transfer Money</h3>
<hr />
Account:
<input
  type="text"
  [value]="transfer.to"
  (change)="handleAccountChange($event)"
/>

<br />
<br />

Ammount:
<input
  type="number"
  [value]="transfer.amount"
  (change)="handleAmountChange($event)"
/>

<br />
<br />

<button (click)="transferMoney()">Transfer money</button> <br /><br />

<button (click)="transferMoneyPost()">Transfer money - POST</button>

app.component.ts

import { Component } from '@angular/core';
import { HttpClient } from '@angular/common/http';
@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  title = 'client';
  transfer = {
    to: '',
    amount: 0
  }

  constructor (private readonly http: HttpClient) {}

  handleAccountChange (event: any): void {
    this.transfer.to = event.target.value
  }

  handleAmountChange (event: any): void {
    this.transfer.amount = parseInt(event.target.value)
  }

  transferMoney (): void {
    this.http.get('/banking/transfer', {
      params: {
        account: this.transfer.to,
        amount: this.transfer.amount
      }
    }).subscribe(console.log)
  }

  transferMoneyPost (): void {
    this.http.post('/banking/transfer', {
      account: this.transfer.to,
      amount: this.transfer.amount
    }).subscribe(console.log)
  }
}