.NET Core 3.0 配置允许所有域名跨域

测试配置可行

public void ConfigureServices(IServiceCollection services)
{
    services.AddCors();
}

SetIsOriginAllowed方法用于判断某个域名是否在允许跨域的名单中，这里不判断直接返回True

public void Configure(IApplicationBuilder app, IWebHostEnvironment env, ILoggerFactory loggerFactory)
{
    app.UseCors(options => options.SetIsOriginAllowed(x => _ = true).AllowAnyMethod().AllowAnyHeader().AllowCredentials());
}

SetIsOriginAllowed方法注释

//
// 摘要:
//     /// Sets the specified isOriginAllowed for the underlying policy. ///
//
// 参数:
//   isOriginAllowed:
//     The function used by the policy to evaluate if an origin is allowed.
//
// 返回结果:
//     The current policy builder.
public CorsPolicyBuilder SetIsOriginAllowed(Func<string, bool> isOriginAllowed)
{
    throw null;
}