Ошибка CORS в проекте веб-API .NET, настраивающем API ⇐ C#

[Anonymous]

Я пытаюсь настроить API. Все работает благодаря Swagger.
Когда я пытаюсь вызвать API из приложения Angular, я получаю ошибки CORS.
Оба находятся на локальном хосте на разных портах .

Я следую документации по включению CORS.
Вот код на Pastebin для моей конфигурации запуска: https://pastebin.com/19V15Hf2< /p>

Код: Выделить всё

using System.Text;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.IdentityModel.Tokens;
using Microsoft.OpenApi.Models;
using Simple_RPG_API.BAL;

namespace Simple_RPG_API
{
public class Startup
{

public Startup(IConfiguration configuration)
{
Configuration = configuration;
}

public IConfiguration Configuration { get; }

// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
services.AddScoped();
services.AddControllers();
services.AddCors(options =>
{
options.AddDefaultPolicy(
builder =>
{
builder.WithOrigins("http://localhost:4200")
.AllowAnyHeader()
.AllowAnyMethod();
});
});
services.AddSwaggerGen(c =>
{
c.SwaggerDoc("v1", new OpenApiInfo { Title = "Simple_RPG_API", Version = "v1" });
});

services.AddScoped();

var key = Encoding.ASCII.GetBytes(Configuration["AppSettings:Secret"]);
services.AddAuthentication(x =>
{
x.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
x.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
})
.AddJwtBearer(x =>
{
x.Events = new JwtBearerEvents
{
OnTokenValidated = context =>
{
var userService = context.HttpContext.RequestServices.GetRequiredService();
var userId = int.Parse(context.Principal.Identity.Name);
var user = userService.GetById(userId);
if (user == null)
{
// return unauthorized if user no longer exists
context.Fail("Unauthorized");
}
return Task.CompletedTask;
}
};
x.RequireHttpsMetadata = false;
x.SaveToken = true;
x.TokenValidationParameters = new TokenValidationParameters
{
ValidateIssuerSigningKey = true,
IssuerSigningKey = new SymmetricSecurityKey(key),
ValidateIssuer = false,
ValidateAudience = false
};
});
}

// This method gets called by the runtime.  Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
app.UseSwagger();
app.UseSwaggerUI(c => c.SwaggerEndpoint("/swagger/v1/swagger.json", "Simple_RPG_API v1"));
}
app.UseHttpsRedirection();
app.UseRouting();
app.UseCors(x => x
.AllowAnyOrigin()
.AllowAnyMethod()
.AllowAnyHeader());
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
}
}

< img alt="Ошибка браузера" src="https://i.sstatic.net/q3VUH.png" />

Подробнее здесь: https://stackoverflow.com/questions/676 ... -up-an-api