我在负载平衡 URL 上遇到了会话问题，会话没有创建，但是当我直接使用 Tomcat URL 时它工作正常。
控制器：
@RequestMapping(value = "/authenticateUser", method = RequestMethod.POST, consumes = MediaType.APPLICATION_JSON_VALUE, produces = MediaType.APPLICATION_JSON_VALUE)
public ResponseEntity<Users> login(@RequestBody LoginParams params, UriComponentsBuilder ucBuilder) {
Users user = null;
try {
/* Check if user is already logged in*/
boolean isUserAlreadyLoggedin = false;
HttpSession httpSession = SessionHandler.getSession();
if (httpSession.getAttribute("session_user") != null) {
isUserAlreadyLoggedin = true;
user = (Users) httpSession.getAttribute("session_user");
}
if (!isUserAlreadyLoggedin) {
// after login related code...
httpSession.setAttribute("session_user", user);
}
return new ResponseEntity<Users>(user, HttpStatus.OK);
} catch (Exception e) {
logger.error("Error while authenticating:" + e.getMessage());
}
}
}
我的会话处理程序帮助类：
class SessionHandler{
public static HttpSession getSession() {
ServletRequestAttributes attr = (ServletRequestAttributes) RequestContextHolder.currentRequestAttributes();
HttpSession session = attr.getRequest().getSession(false);
if (session == null) {
// Not created yet. Now do so yourself.
session = attr.getRequest().getSession(true);
}
return session;
}
public static boolean isSessionAlive()
{
boolean isSessionAlive = false;
try {
HttpSession httpSession = SessionHandler.getSession();
if (httpSession.getAttribute("session_user") != null) {
isSessionAlive = true;
}
}catch(Exception e){
logger.error("Error in Session handler",e);
}
return isSessionAlive;
}
}
通过这种方式，我在用户登录时创建会话，并且对于每个请求，我都会检查会话是否通过以下服务创建。
@RequestMapping(value = "/checkWhetherSessionIsAlive", method = RequestMethod.GET, consumes = MediaType.APPLICATION_JSON_VALUE, produces = MediaType.APPLICATION_JSON_VALUE)
public ResponseEntity<Boolean> checkWhetherSessionIsAlive(UriComponentsBuilder ucBuilder) {
boolean isSessionAlive = false;
try {
HttpSession httpSession = SessionHandler.getSession();
if (httpSession.getAttribute("session_user") == null) {
isSessionAlive = false;
} else {
isSessionAlive = true;
}
} catch (Exception e) {
}
return new ResponseEntity<Boolean>(isSessionAlive, HttpStatus.OK);
}
用户登录后，会话开始创建，用户被重定向到主页，会话立即过期，用户被重定向到登录页面。
总结一下，这个 URL 上没有创建会话：www.application.com/app（f5 负载平衡 --> APache Web 服务器 --> tomcat）
它在 URL 上运行良好：tomcat:8080/AOS/