您好,登錄后才能下訂單哦!
SpringSecurity中怎么禁止用戶重復登陸,針對這個問題,這篇文章詳細介紹了相對應的分析和解答,希望可以幫助更多想解決這個問題的小伙伴找到更簡單易行的方法。
一、SpringMVC項目,配置如下:
首先在修改Security相關的XML,我這里是spring-security.xml,修改UsernamePasswordAuthenticationFilter相關Bean的構造配置
加入
<property name="sessionAuthenticationStrategy" ref="sas" />
新增sas的Bean及其相關配置
<bean id="sas" class="org.springframework.security.web.authentication.session.CompositeSessionAuthenticationStrategy"> <constructor-arg> <list> <bean class="org.springframework.security.web.authentication.session.ConcurrentSessionControlAuthenticationStrategy"> <constructor-arg ref="sessionRegistry"/> <!-- 這里是配置session數量,此處為1,表示同一個用戶同時只會有一個session在線 --> <property name="maximumSessions" value="1" /> <property name="exceptionIfMaximumExceeded" value="false" /> </bean> <bean class="org.springframework.security.web.authentication.session.SessionFixationProtectionStrategy"> </bean> <bean class="org.springframework.security.web.authentication.session.RegisterSessionAuthenticationStrategy"> <constructor-arg ref="sessionRegistry"/> </bean> </list> </constructor-arg> </bean> <bean id="sessionRegistry" class="org.springframework.security.core.session.SessionRegistryImpl" />
加入ConcurrentSessionFilter相關Bean配置
<bean id="concurrencyFilter" class="org.springframework.security.web.session.ConcurrentSessionFilter"> <constructor-arg name="sessionRegistry" ref="sessionRegistry" /> <constructor-arg name="sessionInformationExpiredStrategy" ref="redirectSessionInformationExpiredStrategy" /> </bean> <bean id="redirectSessionInformationExpiredStrategy" class="org.springframework.security.web.session.SimpleRedirectSessionInformationExpiredStrategy"> <constructor-arg name="invalidSessionUrl" value="/login.html" /> </bean>
二、SpringBoot項目
略
三、Bean配置說明
SessionAuthenticationStrategy:該接口中存在onAuthentication方法用于對新登錄用戶進行session相關的校驗。 查看UsernamePasswordAuthenticationFilter及其父類代碼,可以發現在doFilter中存在sessionStrategy.onAuthentication(authResult, request, response);方法 但UsernamePasswordAuthenticationFilter中的sessionStrategy對象默認為NullAuthenticatedSessionStrategy,即不對session進行相關驗證。 如本文配置,建立id為sas的CompositeSessionAuthenticationStrategy的Bean對象。 CompositeSessionAuthenticationStrategy可以理解為一個托管類,托管所有實現SessionAuthenticationStrategy接口的對象,用來批量托管執行onAuthentication函數 這里CompositeSessionAuthenticationStrategy中注入了三個對象,關注ConcurrentSessionControlAuthenticationStrategy,它實現了對于session并發的控制 UsernamePasswordAuthenticationFilter的Bean中注入新配置的sas,用于替換原本的NullAuthenticatedSessionStrategy ConcurrentSessionFilter的Bean用來驗證session是否失效,并通過SimpleRedirectSessionInformationExpiredStrategy將失敗訪問進行跳轉。
四、代碼流程說明(這里模擬用戶現在A處登錄,隨后用戶在B處登錄,之后A處再進行操作時會返回失敗,提示重新登錄)
1、用戶在A處登錄,UsernamePasswordAuthenticationFilter調用sessionStrategy.onAuthentication進行session驗證
2、ConcurrentSessionControlAuthenticationStrategy中的onAuthentication開始進行session驗證,服務器中保存了登錄后的session
/** * In addition to the steps from the superclass, the sessionRegistry will be updated * with the new session information. */ public void onAuthentication(Authentication authentication, HttpServletRequest request, HttpServletResponse response) { //根據所登錄的用戶信息,查詢相對應的現存session列表 final List<SessionInformation> sessions = sessionRegistry.getAllSessions( authentication.getPrincipal(), false); int sessionCount = sessions.size(); //獲取session并發數量,對于XML中的maximumSessions int allowedSessions = getMaximumSessionsForThisUser(authentication); //判斷現有session列表數量和并發控制數間的關系 //如果是首次登錄,根據xml配置,這里應該是0<1,程序將會繼續向下執行, //最終執行到SessionRegistryImpl的registerNewSession進行新session的保存 if (sessionCount < allowedSessions) { // They haven't got too many login sessions running at present return; } if (allowedSessions == -1) { // We permit unlimited logins return; } if (sessionCount == allowedSessions) { //獲取本次http請求的session HttpSession session = request.getSession(false); if (session != null) { // Only permit it though if this request is associated with one of the // already registered sessions for (SessionInformation si : sessions) { //循環已保存的session列表,判斷本次http請求session是否已經保存 if (si.getSessionId().equals(session.getId())) { //本次http請求是有效請求,返回執行下一個filter return; } } } // If the session is null, a new one will be created by the parent class, // exceeding the allowed number } //本次http請求為新請求,進入具體判斷 allowableSessionsExceeded(sessions, allowedSessions, sessionRegistry); }
/** * Allows subclasses to customise behaviour when too many sessions are detected. * * @param sessions either <code>null</code> or all unexpired sessions associated with * the principal * @param allowableSessions the number of concurrent sessions the user is allowed to * have * @param registry an instance of the <code>SessionRegistry</code> for subclass use * */ protected void allowableSessionsExceeded(List<SessionInformation> sessions, int allowableSessions, SessionRegistry registry) throws SessionAuthenticationException { //根據exceptionIfMaximumExceeded判斷是否要將新http請求拒絕 //exceptionIfMaximumExceeded也可以在XML中配置 if (exceptionIfMaximumExceeded || (sessions == null)) { throw new SessionAuthenticationException(messages.getMessage( "ConcurrentSessionControlAuthenticationStrategy.exceededAllowed", new Object[] { Integer.valueOf(allowableSessions) }, "Maximum sessions of {0} for this principal exceeded")); } // Determine least recently used session, and mark it for invalidation SessionInformation leastRecentlyUsed = null; //若不拒絕新請求,遍歷現存seesion列表 for (SessionInformation session : sessions) { //獲取上一次/已存的session信息 if ((leastRecentlyUsed == null) || session.getLastRequest() .before(leastRecentlyUsed.getLastRequest())) { leastRecentlyUsed = session; } } //將上次session信息寫為無效(欺騙) leastRecentlyUsed.expireNow(); }
3、用戶在B處登錄,再次通過ConcurrentSessionControlAuthenticationStrategy的檢查,將A處登錄的session置于無效狀態,并在session列表中添加本次session
4、用戶在A處嘗試進行其他操作,ConcurrentSessionFilter進行Session相關的驗證,發現A處用戶已經失效,提示重新登錄
public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException { HttpServletRequest request = (HttpServletRequest) req; HttpServletResponse response = (HttpServletResponse) res; //獲取本次http請求的session HttpSession session = request.getSession(false); if (session != null) { //從本地session關系表中取出本次http訪問的具體session信息 SessionInformation info = sessionRegistry.getSessionInformation(session .getId()); //如果存在信息,則繼續執行 if (info != null) { //判斷session是否已經失效(這一步在本文4.2中被執行) if (info.isExpired()) { // Expired - abort processing if (logger.isDebugEnabled()) { logger.debug("Requested session ID " + request.getRequestedSessionId() + " has expired."); } //執行登出操作 doLogout(request, response); //從XML配置中的redirectSessionInformationExpiredStrategy獲取URL重定向信息,頁面跳轉到登錄頁面 this.sessionInformationExpiredStrategy.onExpiredSessionDetected(new SessionInformationExpiredEvent(info, request, response)); return; } else { // Non-expired - update last request date/time sessionRegistry.refreshLastRequest(info.getSessionId()); } } } chain.doFilter(request, response); }
5、A處用戶只能再次登錄,這時B處用戶session將會失效重登,如此循環
關于SpringSecurity中怎么禁止用戶重復登陸問題的解答就分享到這里了,希望以上內容可以對大家有一定的幫助,如果你還有很多疑惑沒有解開,可以關注億速云行業資訊頻道了解更多相關知識。
免責聲明:本站發布的內容(圖片、視頻和文字)以原創、轉載和分享為主,文章觀點不代表本網站立場,如果涉及侵權請聯系站長郵箱:is@yisu.com進行舉報,并提供相關證據,一經查實,將立刻刪除涉嫌侵權內容。