https://blog.csdn.net/q646926099/article/details/79082204 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.Ad…
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", "*")…
问题复述 今天项目组有人找我说之前部署的程序在测试环境没问题,到生产环境出现了奇怪的问题,点按钮没反应. 我通过腾讯会议发现他们的浏览器控制台上打出了如下错误: Access to XMLHttpRequest at 'https://aaa.bbb.ccc' from origin 'https://ddd.bbb.ccc' has been blocked by CORS policy: The 'Access-Control-Allow-Origin' header contains mu…
人不可能踏进同一条河流,我可以一天在同一个问题上摔倒两次. 这次是跨域问题,都是泪,教程提供的服务端代码虽然配置了文件,但是依然是没有解决跨域问题,依然报错 Request header field content-type is not allowed by Aceess-Control-Allow-Header in preflight response. 整个跨域代码全部注释掉换上 app.all('*', function(req, res, next) { res.header("Ac…
在做项目时,用到axios,数据用post提交时,老是报错,错误提示为: Access to XMLHttpRequest at 'http://127.0.0.1:3000/api/add' from origin 'http://localhost:8080' has been blocked by CORS policy: Request header field content-type is not allowed by Access-Control-Allow-Headers in…
首先是web端(http://localhost:53784) 请求 api(http://localhost:81/api/)时出现错误信息: 查看控制台会发现错误:XMLHttpRequest cannot load http://localhost:81/api/. No ‘Access-Control-Allow-Origin‘ header is present on the requested resource. Origin ‘http://localhost:53784‘ is…