security shiro获取的是前一个用户的数据
目录
1，现象
2，问题猜测
3，问题定位和debug
4，结论
5，解决方案
一，现象
1，用户1登录，做了一些其他业务请求，退出
2，用户2登录，发现返回的是用户1的数据
二，猜测
1，客户端有用keepalive和服务器端shiro ThreadLocal导致，可能导致用户1登录和用户2登录，两次http请求使用的一个客户端tcp链接，对接到服务器端同一个链接同一个线程上，又shiro有基于ThreadLocal保存用户信息，故而有如上现象
2，客户端有使用cookie和服务器端有session导致，可能用户1登录保存了用户1的cookie，用户2登录的时候带上了用户1的cookie，故而读取的用户1的信息
三，定位问题
客户端有用keepalive和服务器端shiro ThreadLocal问题
1，客户端keepalive，需要客户端支持联调
2，服务器端打印了threadId，ThreadLocal，shiro subject中的数据
3，测试发现，用户1登录和用户2登录使用的是两个不同的线程，但是shiro subject的数据是一样的，如此可以暂时排除服务器同一个线程中threadLocal问题，经过本地debug发现，可能有服务器会话的可能性较大
4，结论，排除这个可能
客户端有使用cookie和服务器端有session问题
1，本地debug要求，idea开启debug模式，能支持两次以上的请求，以方便模拟用户1登录请求和用户2登录请求，关键设置是：设置debug配置，允许Leave enabled，并且用F9调试
2，因为怀疑客户端有cookie，则打印所有http header中的参数，发现确实有cookie，如下
Set-Cookie: JSESSIONID=76CD05659A8AFC4A5E025D9213FFADEC; Path=/; HttpOnly
Set-Cookie: rememberMe=deleteMe; Path=/; Max-Age=0; Expires=Tue, 23-Nov-2021 06:58:19 GMT; SameSite=lax
3，在本地测试，获取到了用户1登录返回的cookie数据，并在用户2登录请求上带上cookie数据，用F9一步步调试，看idea形成的调试栈空间，并一步步定位何时处理cookie并转为服务器session的。
4，一句话总结就是：因为shiro配置问题，用户1登录请求之后返回了cookie数据，用户2登录时带上了用户1的cookie。服务器有一个全局的session CurrentHashmap存储了session，通过JSESSIONID（就是sessionId）获取session，通过session的attribute，获取subject 的principal的数据，该数据就存储的是用户信息。
5，补充一点的是，shiro还支持 记住我（rememberMe），如上cookie所示，基于cookie来实现的，不过当前我们是没有用到这个功能，故而，Set-Cookie: rememberMe=deleteMe
定位如下，关键代码
DefaultSecurityManager.java
重点：context = resolveSession(context)
重点：context = resolvePrincipals(context);
重点：Subject subject = doCreateSubject(context);
public Subject createSubject(SubjectContext subjectContext) {
//create a copy so we don't modify the argument's backing map:
SubjectContext context = copy(subjectContext);
//ensure that the context has a SecurityManager instance, and if not, add one:
context = ensureSecurityManager(context);
//Resolve an associated Session (usually based on a referenced session ID), and place it in the context before
//sending to the SubjectFactory. The SubjectFactory should not need to know how to acquire sessions as the
//process is often environment specific - better to shield the SF from these details:
context = resolveSession(context);
//Similarly, the SubjectFactory should not require any concept of RememberMe - translate that here first
//if possible before handing off to the SubjectFactory:
context = resolvePrincipals(context);
Subject subject = doCreateSubject(context);
//save this subject for future reference if necessary:
//(this is needed here in case rememberMe principals were resolved and they need to be stored in the
//session, so we don't constantly rehydrate the rememberMe PrincipalCollection on every operation).
//Added in 1.2:
save(subject);
return subject;
}
Request.java
重点：session = manager.findSession(requestedSessionId);
protected Session doGetSession(boolean create) {
// There cannot be a session if no context has been assigned yet
Context context = getContext();
if (context == null) {
return null;
}
// Return the current session if it exists and is valid
if ((session != null) && !session.isValid()) {
session = null;
}
if (session != null) {
return session;
}
// Return the requested session if it exists and is valid
Manager manager = context.getManager();
if (manager == null) {
return null; // Sessions are not supported
}
if (requestedSessionId != null) {
try {
session = manager.findSession(requestedSessionId);
} catch (IOException e) {
session = null;
}
if ((session != null) && !session.isValid()) {
session = null;
}
if (session != null) {
session.access();
return session;
}
}
// Create a new session if requested and the response is not committed
if (!create) {
return null;
}
boolean trackModesIncludesCookie =
context.getServletContext().getEffectiveSessionTrackingModes().contains(SessionTrackingMode.COOKIE);
if (trackModesIncludesCookie && response.getResponse().isCommitted()) {
throw new IllegalStateException(sm.getString("coyoteRequest.sessionCreateCommitted"));
}
// Re-use session IDs provided by the client in very limited
// circumstances.
String sessionId = getRequestedSessionId();
if (requestedSessionSSL) {
// If the session ID has been obtained from the SSL handshake then
// use it.
} else if (("/".equals(context.getSessionCookiePath())
&& isRequestedSessionIdFromCookie())) {
/* This is the common(ish) use case: using the same session ID with
* multiple web applications on the same host. Typically this is
* used by Portlet implementations. It only works if sessions are
* tracked via cookies. The cookie must have a path of "/" else it
* won't be provided for requests to all web applications.
*
* Any session ID provided by the client should be for a session
* that already exists somewhere on the host. Check if the context
* is configured for this to be confirmed.
*/
if (context.getValidateClientProvidedNewSessionId()) {
boolean found = false;
for (Container container : getHost().findChildren()) {
Manager m = ((Context) container).getManager();
if (m != null) {
try {
if (m.findSession(sessionId) != null) {
found = true;
break;
}
} catch (IOException e) {
// Ignore. Problems with this manager will be
// handled elsewhere.
}
}
}
if (!found) {
sessionId = null;
}
}
} else {
sessionId = null;
}
session = manager.createSession(sessionId);
// Creating a new session cookie based on that session
if (session != null && trackModesIncludesCookie) {
Cookie cookie = ApplicationSessionCookieConfig.createSessionCookie(
context, session.getIdInternal(), isSecure());
response.addSessionCookieInternal(cookie);
}
if (session == null) {
return null;
}
session.access();
return session;
}
public PrincipalCollection resolvePrincipals() {
PrincipalCollection principals = getPrincipals();
if (isEmpty(principals)) {
//check to see if they were just authenticated:
AuthenticationInfo info = getAuthenticationInfo();
if (info != null) {
principals = info.getPrincipals();
}
}
if (isEmpty(principals)) {
Subject subject = getSubject();
if (subject != null) {
principals = subject.getPrincipals();
}
}
if (isEmpty(principals)) {
//try the session:
Session session = resolveSession();
if (session != null) {
principals = (PrincipalCollection) session.getAttribute(PRINCIPALS_SESSION_KEY);
}
}
return principals;
}
CookieRememberMeManager
重点：String base64 = getCookie().readValue(request, response);
重点：if (Cookie.DELETED_COOKIE_VALUE.equals(base64)) return null;
DELETED_COOKIE_VALUE=deleteMe
protected byte[] getRememberedSerializedIdentity(SubjectContext subjectContext) {
if (!WebUtils.isHttp(subjectContext)) {
if (log.isDebugEnabled()) {
String msg = "SubjectContext argument is not an HTTP-aware instance. This is required to obtain a " +
"servlet request and response in order to retrieve the rememberMe cookie. Returning " +
"immediately and ignoring rememberMe operation.";
log.debug(msg);
}
return null;
}
WebSubjectContext wsc = (WebSubjectContext) subjectContext;
if (isIdentityRemoved(wsc)) {
return null;
}
HttpServletRequest request = WebUtils.getHttpRequest(wsc);
HttpServletResponse response = WebUtils.getHttpResponse(wsc);
String base64 = getCookie().readValue(request, response);
// Browsers do not always remove cookies immediately (SHIRO-183)
// ignore cookies that are scheduled for removal
if (Cookie.DELETED_COOKIE_VALUE.equals(base64)) return null;
if (base64 != null) {
base64 = ensurePadding(base64);
if (log.isTraceEnabled()) {
log.trace("Acquired Base64 encoded identity [" + base64 + "]");
}
byte[] decoded;
try {
decoded = Base64.decode(base64);
} catch (RuntimeException rtEx) {
/*
* https://issues.apache.org/jira/browse/SHIRO-766:
* If the base64 string cannot be decoded, just assume there is no valid cookie value.
* */
getCookie().removeFrom(request, response);
log.warn("Unable to decode existing base64 encoded entity: [" + base64 + "].", rtEx);
return null;
}
if (log.isTraceEnabled()) {
log.trace("Base64 decoded byte array length: " + decoded.length + " bytes.");
}
return decoded;
} else {
//no cookie set - new site visitor?
return null;
}
}
四，结论
1，一句话总结就是：因为shiro配置问题，用户1登录请求之后返回了cookie数据，用户2登录时带上了用户1的cookie。服务器有一个全局的session CurrentHashmap存储了session，通过JSESSIONID（就是sessionId）获取session，通过session的attribute，获取subject 的principal的数据，该数据就存储的是用户信息。
五，解决方案
1，主要配置不创建session： context.setSessionCreationEnabled(false)等。如下：
@Bean
protected ShiroFilterFactoryBean shiroFilterFactoryBean(ShiroFilterChainDefinition shiroFilterChainDefinition, SecurityManager securityManager) {
ShiroFilterFactoryBean filterFactoryBean = new ShiroFilterFactoryBean();
DefaultWebSecurityManager webSecurityManager = (DefaultWebSecurityManager) securityManager;
DefaultSubjectDAO subjectDAO = new DefaultSubjectDAO();
DefaultSessionStorageEvaluator defaultSessionStorageEvaluator = new DefaultSessionStorageEvaluator();
//设置不存储session
defaultSessionStorageEvaluator.setSessionStorageEnabled(false);
subjectDAO.setSessionStorageEvaluator(defaultSessionStorageEvaluator);
webSecurityManager.setSubjectDAO(subjectDAO);
//设置不生成session的subjectContext
webSecurityManager.setSubjectFactory(subjectFactory());
//设置 关闭轮询校验session的 会话管理器，因为会话也是有有效期的，需要有额外的开销去维护
webSecurityManager.setSessionManager(sessionManager());
filterFactoryBean.setSecurityManager(securityManager);
filterFactoryBean.setFilterChainDefinitionMap(shiroFilterChainDefinition.getFilterChainMap());
Map<String, Filter> filterMap = new HashMap<>();
//自定义拦截器
filterMap.put("auth", new AuthFilter());
filterFactoryBean.setFilters(filterMap);
return filterFactoryBean;
}
public DefaultSubjectFactory subjectFactory() {
return new StatelessSubjectFactory();
}
public SessionManager sessionManager() {
DefaultSessionManager sessionManager = new DefaultSessionManager();
// 关闭session校验轮询
sessionManager.setSessionValidationSchedulerEnabled(false);
return sessionManager;
}
public class StatelessSubjectFactory extends DefaultWebSubjectFactory {
@Override
public Subject createSubject(SubjectContext context) {
//不创建session
context.setSessionCreationEnabled(false);
return super.createSubject(context);
}
}