.Net 跨域口诀

上级发政策

   services.AddCors(a=>a.AddPolicy("any", configurePolicy=> configurePolicy.AllowAnyOrigin().AllowAnyMethod().AllowAnyHeader()));

     // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            //配置客户端缓存
            services.AddResponseCaching();
            //配置跨域问题
            services.AddCors(a=>a.AddPolicy("any", configurePolicy=> configurePolicy.AllowAnyOrigin().AllowAnyMethod().AllowAnyHeader()));
            services.AddSession();
            services.AddControllersWithViews();
        }

 

政府使用政策

//添加跨域
app.UseCors();

 

     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();
            }
            app.UseHttpsRedirection();
            app.UseStaticFiles();
            //使用客户端缓存
            app.UseResponseCaching();
            //添加跨域
            app.UseCors();
            app.UseRouting();
            app.UseSession();
            app.UseAuthorization();

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

 

百姓受惠利

 [EnableCors("Any")]

Cors 跨域职员共享,允许服务器在响应头里面指定Access-Control-Allow-Origin, 浏览器按照响应来操作,

自定义 ActionFilter-response增加头文件Access-Control-Allow-Origin 就可以实现

跨域的根本是因为浏览器的协议不允许,其实只需要在请求返回的时候在

前台跨域:

 JQuery.support.cors=true;