reque专题
jQuery 跨域访问的三种方式 No 'Access-Control-Allow-Origin' header is present on the reque
Js代码 XMLHttpRequest cannot load http://v.xxx.com. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:63342' is therefore not allowed access.
连接数据库报错：Communications link failure,PKIX path building failed：findvalid certification path to reque
连接数据库报错。 Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up. at sun.reflect.Native
AxiosError {message: “Request failed with status code 404“, name: “AxiosError“, code: “ERR_BAD_REQUE
问题描述：封装了get请求但没有携带请求头，能正常请求数据，携带请求头后，请求数据报以下错误，将请求路径单独在浏览器里的请求栏请求也不会报错 解决办法：检查url，一般报这种错误是url出现了错误，我这里就是url错误导致的