WebApi中启用CORS跨域访问 1.安装 Nugget包Microsoft.AspNet.WebApi.Cors This package contains the components to enable Cross-Origin Resource Sharing (CORS) in ASP.NET Web API. 此包包含启用跨域资源共享的组件(CORS)在ASP.NET Web API. 目前版本是5.2.3 依赖项: Microsoft.AspNet.WebApi.Core (>=
XMLHttpRequest cannot load http://localhost:3000/. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'null' is therefore not allowed access. 上面是我学习nodejs中碰到的一个异常,下面有代码以及解决方案. 1)js文件代码 var http=require('http');var qu
今天试着用Hbuilder写app的前段显示页面,在第一步时就被打住了,ajax异步调用服务器的登录接口时,报错, 显示这样的错误 XMLHttpRequest cannot loadhttp://www.baidu.com/. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'null' is therefore not allowed access. 这个百度的网址是我自