c# asp .net core HTTP POST 请求适用于 Postman，但不适用于我的 Angular 客户端（404 错误）

Question

I have troubles with my c# asp .net core Rest Server. I created an AuthenticationController with a test Route which seems to be working with Postman but when I am trying to get the same result in my Angular 6 Application I get an 404 error that the route is not found, although it is the exact same url.

My Asp .net core Controller:

[Authorize]
[ApiController]
[Route("api/[controller]")]
public class AuthenticationController : ControllerBase
{
    private readonly IAuthenticationService _service;

    public AuthenticationController(IAuthenticationService service)
    {
        _service = service;
    }


    [AllowAnonymous]
    [HttpPost("[action]")]
    public IActionResult Test()
    {
        return Ok("It worked");
    }

}

My Angular Service where the route is called:

import {Injectable} from '@angular/core';
import {HttpClient, HttpErrorResponse, 
HttpHeaders}from'@angular/common/http';


const SERVER_URL = 'http://localhost:4000/api/authentication/';

@Injectable({providedIn: 'root'})
export class LoginService {
public token: string;

constructor(private sessionUser: SessionUserService, private http: 
HttpClient, private rolesService: RolesService) {}



test() {
  return this.http.post(SERVER_URL + 'test', {})
  .map((response: any) => {
    console.log(response);
    return response;
  })
  .catch(err => {
    console.log(err);
    return Observable.of(false);
  });
 }

}

and here are the different results:

Calling the route from my Angular Client:

Calling the route from Postman:

Output of the asp .net core server console:

As you can see in the console logs from the server there is a 404 and a 200 Request finished. The one with 404 is my Application the one with 200 is the one from Postman.

Note:

CORS shouldn't be a problem since I have the google chrome extension.

I also tried to avoid this error with proxy configuration which angular supports.

Answer 1

As you can see you got a 404 for OPTIONS request. We send options request when we send crossdomain request.

Please ensure that your CORS in asp.net app is configured. Because when you use POSTMAN it's not a crossdomain request.

You should add response header Access-Control-Allow-Origin: *