Angular2 – Redirect to calling url after successful login

There’s a tutorial in the Angular Docs, Milestone 5: Route guards. One possible way to achieve this is by using your AuthGuard to check for your login status and store the url on your AuthService.

AuthGuard

import { Injectable }       from '@angular/core';
import {
  CanActivate, Router,
  ActivatedRouteSnapshot,
  RouterStateSnapshot
}                           from '@angular/router';
import { AuthService }      from './auth.service';

@Injectable()
export class AuthGuard implements CanActivate {
  constructor(private authService: AuthService, private router: Router) {}

  canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): boolean {
    let url: string = state.url;

    return this.checkLogin(url);
  }

  checkLogin(url: string): boolean {
    if (this.authService.isLoggedIn) { return true; }

    // Store the attempted URL for redirecting
    this.authService.redirectUrl = url;

    // Navigate to the login page with extras
    this.router.navigate(['/login']);
    return false;
  }
}

AuthService or your LoginService

import { Injectable } from '@angular/core';
import { Http, Response } from '@angular/http';
import { Router } from '@angular/router';

@Injectable()
export class AuthService {
  isLoggedIn: boolean = false;    
  // store the URL so we can redirect after logging in
  public redirectUrl: string;

  constructor (
   private http: Http,
   private router: Router
  ) {}

  login(username, password): Observable<boolean> {
    const body = {
      username,
      password
    };
    return this.http.post('api/login', JSON.stringify(body)).map((res: Response) => {
      // do whatever with your response
      this.isLoggedIn = true;
      if (this.redirectUrl) {
        this.router.navigate([this.redirectUrl]);
        this.redirectUrl = null;
      }
    }
  }

  logout(): void {
    this.isLoggedIn = false;
  }
}

I think this will give an idea how things work, of course you probably need to adapt to your code