[英]JSF Redirect causes exception in a filter
我已經為要保護的所有頁面配置了身份驗證篩選器。 但是,當它嘗試重定向到登錄頁面時,遇到以下錯誤
com.sun.faces.context.FacesFileNotFoundException
..這是我的過濾器
@WebFilter(filterName = "Authentication Filter", urlPatterns = { "/pages/*" }, dispatcherTypes = {
DispatcherType.REQUEST, DispatcherType.FORWARD })
public class AuthenticationFilter implements Filter {
static final Logger logger = Logger.getLogger(AuthenticationFilter.class);
private String contextPath;
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
HttpServletRequest httpRequest = (HttpServletRequest) request;
HttpServletResponse httpResponse = (HttpServletResponse) response;
if (httpRequest.getUserPrincipal() == null) {
httpResponse.sendRedirect(contextPath
+ "/faces/pages/public/login.xhtml");
return;
}
chain.doFilter(request, response);
}
public void init(FilterConfig fConfig) throws ServletException {
contextPath = fConfig.getServletContext().getContextPath();
}
}
..,並將我的web.xml與此人servlet的代碼映射
<servlet>
<servlet-name>Faces Servlet</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>*.xhtml</url-pattern>
</servlet-mapping>
不確定,但我已驗證該路徑在我的項目文件夾中存在
+pages
+public
-login.xhtml
生成的路徑是
http://localhost:8080/MyApp/faces/pages/public/login.xhtml
有人知道原因嗎?
異常表明JSF無法找到視圖。 您的項目是否具有以下目錄結構:contextRoot / faces / pages / public / login.xhtml?
通常,某些IDE(即NetBeans)默認將/faces
路徑前綴添加到faces url-pattern中。 您可能已從web.xml對其進行了更改,但尚未從過濾器sendRedirect參數中刪除它。
為了使您的過濾器正常工作,請從過濾器中的sendRedirect()
方法中刪除/faces
前綴:
httpResponse.sendRedirect(contextPath + "/pages/public/login.xhtml");
或像這樣將其添加到web.xml中:
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>/faces/*</url-pattern>
</servlet-mapping>
最后,請注意您的過濾器不會引起無限循環。 在重定向之前添加此檢查可能會很有用:
HttpServletRequest req = (HttpServletRequest) request;
if (!req.getRequestURI().contains("/pages/public/login.xhtml") && httpRequest.getUserPrincipal() == null) {
// redirect
return;
}
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