Trying to add Azure AD authentication to an Angular 7 webapp with a .net core 2.1 backend.
However, I get the CORS error during the request.
"Access to XMLHttpRequest at 'https://login.microsoftonline.com/.......' (redirected from 'https://localhost:5001/api/auth/login') from origin 'https://localhost:5001' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource."
So I tried adding some CORS policy in the startup pipe-line.
Startup.cs
public Startup(IConfiguration configuration)
{
Configuration = configuration;
}
public IConfiguration Configuration { get; }
public void ConfigureServices(IServiceCollection services)
{
services.AddCors(config => config
.AddPolicy("SiteCorsPolicy", builder => builder
.AllowAnyHeader()
.AllowAnyMethod()
.AllowAnyOrigin()
.AllowCredentials()
)
); // <--- CORS policy - allow all for now
services.AddAuthentication(options =>
{
options.DefaultChallengeScheme = OpenIdConnectDefaults.AuthenticationScheme;
options.DefaultSignInScheme = CookieAuthenticationDefaults.AuthenticationScheme;
options.DefaultAuthenticateScheme = CookieAuthenticationDefaults.AuthenticationScheme;
})
.AddOpenIdConnect(options =>
{
options.Authority = "https://login.microsoftonline.com/MY_AD_DOMAIN.onmicrosoft.com"; // ad domain
options.ClientId = "my_client_id"; // client guid
options.ResponseType = OpenIdConnectResponseType.IdToken;
options.CallbackPath = "/auth/signin-callback";
options.SignedOutRedirectUri = "https://localhost:5000";
options.TokenValidationParameters.NameClaimType = "name";
}).AddCookie();
services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);
// In production, the Angular files will be served from this directory
services.AddSpaStaticFiles(configuration =>
{
configuration.RootPath = "ClientApp/dist";
});
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
else
{
app.UseExceptionHandler("/Error");
app.UseHsts();
}
app.UseCors("SiteCorsPolicy"); // <--- CORS policy
app.UseHttpsRedirection();
app.UseStaticFiles();
app.UseSpaStaticFiles();
app.UseAuthentication();
app.UseMvc(routes =>
{
routes.MapRoute(
name: "default",
template: "{controller}/{action=Index}/{id?}");
});
app.UseSpa(spa =>
{
spa.Options.SourcePath = "ClientApp";
if (env.IsDevelopment())
{
spa.UseAngularCliServer(npmScript: "start");
}
});
}
}
angular auth service
login() {
const url = this.baseUrl + "api/auth/login";
this._http.get(url).subscribe(response => {
console.log(response);
});
}
Or am I going the wrong way about it? Should I use some third pary "ADAL" npm package (https://www.npmjs.com/package/adal-angular) to extract the token from the client side and then pass the token to the server for validation?
If I navigate to the login URL, e.g: localhost:5000/api/auth/login --> I get set off to the AAD login page, and redirected back at successful authentication. But if I trigger it from code, I get the CORS error.
withCredentialsbc that doesn't work with cookies – Daniel A. White