How to establish a cross-domain connection Typically if the browser loads a page from http://contoso.com, the SignalR connection is in the same domain, athttp://contoso.com/signalr. If the page from http://contoso.com makes a connection to http://fab…
跨域是前端开发中经常会遇到的问题,前端调用后台服务时,通常会遇到 No 'Access-Control-Allow-Origin' header is present on the requested resource的错误,这是因为浏览器的同源策略拒绝了我们的请求.所谓同源是指,域名,协议,端口相同,浏览器执行一个脚本时同源的脚本才会被执行.如果非同源,那么在请求数据时,浏览器会在控制台中报一个异常,提示拒绝访问. 跨域是指a页面想获取b页面资源,如果a.b页面的协议.域名.端口.子域名不…
Nuget安装包:microsoft.aspnet.webapi.cors 原文地址:https://www.asp.net/web-api/overview/security/enabling-cross-origin-requests-in-web-api Enable CORS Now let's enable CORS in the WebService app. First, add the CORS NuGet package. In Visual Studio, from the…