Azure 代理，CORs 请求时出错 IIS 托管 Z8A5DA52ED126447AD359E70C0572

Question

I hosted a web api in IIS and now because i need to access my api from everywhere i create an azure proxy but every time that i use my UI to make a request, i get this error

startup.cs

ConfigureServices

services.AddCors(options =>
        {
            options.AddDefaultPolicy(
                builder =>
                {
                    builder
                    .SetIsOriginAllowed((string v) => _ = true)
                    .AllowAnyHeader()
                    .AllowAnyMethod()
                    .AllowCredentials();
                });
        });

Configure

            app.UseSerilogRequestLogging();

        app.UseHttpsRedirection();

        app.UseRouting();

        app.UseCors();

        app.UseAuthentication();

        app.UseAuthorization();

        app.UseEndpoints(endpoints =>
        {
            endpoints.MapControllers();
        });

if i run my front-end code in the network where the IIS is and instead of calling the proxy call the api localhost it works just fine.

Answer 1

You need add mycors rule in ConfigureServices. For more details, you can read the offical document .

    public void ConfigureServices(IServiceCollection services)
    {
        services.AddCors(options =>options.AddPolicy("mycors",
             p => p.AllowAnyOrigin())
        );
        services.AddControllersWithViews();
    }

Then apply mycors in Configure function.

    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }
        else
        {
            app.UseExceptionHandler("/Home/Error");
            // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
            app.UseHsts();
        }

        //*****apply mycors****

        app.UseCors("mycors"); 

        //*********************


        app.UseHttpsRedirection();
        app.UseStaticFiles();

        app.UseRouting();

        app.UseAuthorization();

        app.UseEndpoints(endpoints =>
        {
            endpoints.MapControllerRoute(
                name: "default",
                pattern: "{controller=Home}/{action=Index}/{id?}");
        });
    }

I depoly my two project. You can see source code, and I have achieve cross-domain functionality.