用angular发起http.get(),访问后端web API要数据,结果chrome报错:跨域了 Access to XMLHttpRequest at 'http://127.0.0.1:3000/XXX' from origin 'http://127.0.0.1:4200' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resour
使用Ajax跨域请求资源,Nginx作为代理,出现:The 'Access-Control-Allow-Origin' header contains multiple values '*, *', but only one is allowed 错误. 服务端允许跨域配置: #region 设置允许跨域,允许复杂请求 HttpContext.Current.Response.AddHeader("Access-Control-Allow-Origin", "*")