[转载]【Abp VNext】实战入门（七）：【1】xxx.Web网站层 —— API接口服务添加跨域访问支持

添加指定跨域支持

private const string DefaultCorsPolicyName = "Default";
public override void ConfigureServices(ServiceConfigurationContext context)
        {
            var hostingEnvironment = context.Services.GetHostingEnvironment();
            var configuration = context.Services.GetConfiguration();
            //............................
            //添加跨域支持：原有代码不用动
            context.Services.AddCors(options =>
            {
                options.AddPolicy(DefaultCorsPolicyName , builder =>
                {
                    builder.WithOrigins(
                            configuration["App:CorsOrigins"]
                                .Split(",", StringSplitOptions.RemoveEmptyEntries)
                                .Select(o => o.RemovePostFix("/"))
                                .ToArray()
                        )
                        .WithAbpExposedHeaders()
                        .SetIsOriginAllowedToAllowWildcardSubdomains()
                        .AllowAnyHeader()
                        .AllowAnyMethod()
                        .AllowCredentials();
                });
            });
        }

        public override void OnApplicationInitialization(ApplicationInitializationContext context)
        {
            var app = context.GetApplicationBuilder();
            var env = context.GetEnvironment();             
 
            //必须放在下面2个的前面才有用 不然还是报跨域错误：
            app.UseCors(DefaultCorsPolicyName);
            app.UseIdentityServer();            
            app.UseAuthorization();           
        }

添加所有跨域支持：简单粗暴疗效好

private const string DefaultCorsPolicyName = "Default";
public override void ConfigureServices(ServiceConfigurationContext context)
        {
            var hostingEnvironment = context.Services.GetHostingEnvironment();
            var configuration = context.Services.GetConfiguration();
            //............................
            //添加跨域支持：原有代码不用动
            context.Services.AddCors(options =>
            {
                options.AddPolicy(DefaultCorsPolicyName , builder =>
                {
                    builder
                        .AllowAnyOrigin()//添加这个
                        .WithAbpExposedHeaders()
                        .SetIsOriginAllowedToAllowWildcardSubdomains()
                        .AllowAnyHeader()
                        .AllowAnyMethod();
                        //.AllowCredentials(); 去掉这个
                });
            });
        }

        public override void OnApplicationInitialization(ApplicationInitializationContext context)
        {
            var app = context.GetApplicationBuilder();
            var env = context.GetEnvironment();             
 
            //必须放在下面2个的前面才有用 不然还是报跨域错误：
            app.UseCors(DefaultCorsPolicyName);
            app.UseIdentityServer();            
            app.UseAuthorization();           
        }