DiunaBI/WebAPI/Program.cs

using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.EntityFrameworkCore;
using Microsoft.IdentityModel.Tokens;
using Newtonsoft.Json.Linq;
using System.IdentityModel.Tokens.Jwt;
using System.Text;
using WebAPI;

var builder = WebApplication.CreateBuilder(args);

var connectionString = builder.Configuration.GetConnectionString("SQLDatabase");
builder.Services.AddDbContext<AppDbContext>(x => x.UseSqlServer(connectionString));

builder.Services.AddCors(options =>
{
    options.AddPolicy("CORSPolicy", builder =>
    {
        builder.WithOrigins("http://localhost:4200")
        .AllowAnyMethod()
        .AllowAnyHeader()
        .AllowCredentials();

        builder.WithOrigins("https://diuna.bim-it.pl")
        .AllowAnyMethod()
        .AllowAnyHeader()
        .AllowCredentials();
    });
});

builder.Services.AddControllers();

builder.Services.AddAuthentication(options =>
{
    options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
    options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
    options.DefaultScheme = JwtBearerDefaults.AuthenticationScheme;
}).AddJwtBearer(options =>
{
    options.TokenValidationParameters = new TokenValidationParameters
    {
        ValidateIssuer = false,
        ValidateAudience = false,
        ValidateLifetime = true,
        ValidateIssuerSigningKey = true,
        IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(builder.Configuration["Secret"]))
    };

});
builder.Services.AddAuthorization();


// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();

var app = builder.Build();

app.Use(async (context, next) =>
{
    string token = context.Request.Headers["Authorization"].ToString();
    if (token.Length > 0) {
        var handler = new JwtSecurityTokenHandler();
        var data = handler.ReadJwtToken(token.Split(' ')[1]);
        context.Request.Headers.Add("UserId", new Microsoft.Extensions.Primitives.StringValues(data.Subject));
    }
    await next(context);
});

// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI();
}

// app.UseHttpsRedirection();
app.UseCors("CORSPolicy");

app.UseAuthorization();
app.UseAuthorization();

app.MapControllers();

app.Run();