https://www.cnblogs.com/cjsblog/p/9184173.html
Spring Security OAuth 2.0

https://stackoverflow.com/questions/36076737/springboot-tomcatembeddedservletcontainer-keepalivetimeout-not-working
Spring boot TomcatEmbeddedServletContainer KeepAliveTimeout not working

https://juejin.im/post/5cb3e71a5188251b0e4e3887
【长文剖析】Spring Cloud OAuth 生成Token 源码解析