CORS策略旨在提高Web应用的安全性,防止恶意网站通过跨域请求访问敏感数据。 为什么会出现“blocked by CORS policy: request header field content-type is not allowed by”错误 这个错误通常发生在前端JavaScript代码尝试向不同源(即协议、域名或端口中的任何一个不同)的服务器发送HTTP请求时。如果目标服务器没有正确...
Access to XMLHttpRequest at 'http://192.168.31.111:9000/api/user/session' from origin 'http://localhost:8080' has been blocked by CORS policy: The 'Access-Control-Allow-Origin' header contains multiple values 'http://localhost:8080, *', but only one is allowed. 报错的大致描述是:从http:...
node.js socket.io cors Your custom headers actually never get written for socket.io related requests. Socket.IO overrides some methods of the http server. One of them is the triggering of the 'request' handlers. Socket.IO only allows itself to be the primary handler of all requests. Then ...
近期用uni-app开发的应用,在小程序中没有任何问题,包括调试、上线,但是在google chrome调试网页版时就出现接口报405 method not allowed错误。 按照网上的方法在nginx跨域请求cors配置如下: location / { add_header 'Access-Control-Allow-Origin' 'https://api.xxxx.com'; add_header "Access-Control-Allow-Cred...
The CORS error "Request header field Access-Control-Allow-Headers is not allowed by Access-Control-Allow-Headers in preflight response" occurs when your browser sends a request header that is not included in your server's Access-Control-Allow-Headers response header. ...
Child actions are not allowed to perform redirect actions Claims Authentication : Object reference not set to an instance of an object. MVC 5 Claims-Value cannot be null class for @Html.ActionLink class name is not valid at this point Class with IEnumerable as property error clear file upload...
1Access 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-Headersinpreflight response.
@Component @WebFilter public class CorsFilter implements Filter { private final static String SPLIT = ";"; @Value("${roc.allow.origins:http://aa.aa.cn:8088}") private String allowOrigins ; private List<String> allows = null; @Override public void init(FilterConfig filterConfig) throws Serv...
node.js google-chrome Since they are running on different ports, they are different domains. It doesn't matter that they are on the same machine/hostname. You need to enable CORS on the server (localhost:8080). Check out this site:http://enable-cors.org/ ...
ssm+vue 使用shiro后 post请求报错 Request header field Content-Type is not allowed by Access-Control-Allow-H,程序员大本营,技术文章内容聚合第一站。