Session Spring安全预认证-即使主体未更改，也为我提供了一个新会话

为了与Tivoli Access Manager集成，我在Grails应用程序中实现了一个spring安全预认证过滤器

对于我的web应用程序中的每个请求，都会调用过滤器——尽管过滤器返回与前一个请求相同的主体，但它似乎创建了一个新会话。我已经创建了一个ApplicationListener来侦听身份验证事件，我可以看到一个新的AuthenticationSuccessEvent，每个请求都有一个新的会话id

这意味着我的所有会话变量在每次请求时都会被清除——这没什么大不了的，但它破坏了Uploader插件

当我为预验证筛选器打开调试日志时，我看到它认为主体已更改，即使它没有：

2015-03-04 11:34:57.769 foobar.TamAuthenticationFilter Checking secure context token: org.springframework.security.web.authentication.preauth.PreAuthenticatedAuthenticationToken@f0666480: Principal: grails.plugin.springsecurity.userdetails.GrailsUser@3125618: Username: 66734; Password: [PROTECTED]; Enabled: true; AccountNonExpired: true; credentialsNonExpired: true; AccountNonLocked: true; Granted Authorities: ROLE_ADMIN,ROLE_APPROVER; Credentials: [PROTECTED]; Authenticated: true; Details: org.springframework.security.web.authentication.WebAuthenticationDetails@fffde5d4: RemoteIpAddress: 0:0:0:0:0:0:0:1; SessionId: 87928D9E25D98DD3CCFAC5D67689E609; Granted Authorities: ROLE_ADMIN, ROLE_APPROVER
2015-03-04 11:34:57.770 foobar.TamAuthenticationFilter Pre-authenticated principal has changed to 66734 and will be reauthenticated
2015-03-04 11:34:57.770 foobar.TamAuthenticationFilter Invalidating existing session
2015-03-04 11:34:57.771 foobar.TamAuthenticationFilter preAuthenticatedPrincipal = 66734, trying to authenticate

如何使spring security对预身份验证筛选器返回的每个主体使用相同的会话，而不是为每个请求创建一个新的会话

这是我的过滤器：

package foobar

import org.springframework.security.web.authentication.preauth.AbstractPreAuthenticatedProcessingFilter
import grails.util.Environment
import grails.util.Holders
import groovy.util.logging.Log4j

@Log4j
class TamAuthenticationFilter extends   AbstractPreAuthenticatedProcessingFilter {

java.lang.Object getPreAuthenticatedCredentials(javax.servlet.http.HttpServletRequest request)
{
    "N/A"
}

java.lang.Object getPreAuthenticatedPrincipal(javax.servlet.http.HttpServletRequest request)
{
    Long staffId = getStaffIdFromTamHeader(request)
    if(!staffId)
        log.error "iv-user header not found"

    return staffId
}

/**
 * Get Staff ID from the ivUser Tamheader.
 * @param request
 * @return
 */
static public Long getStaffIdFromTamHeader(request) {
    return request.getHeader("iv-user")
}

}

LoggingSecurityEventListener：

 package foobar

 import groovy.util.logging.Log4j
 import org.springframework.context.ApplicationListener
 import org.springframework.security.authentication.event.AbstractAuthenticationEvent


 @Log4j
 class LoggingSecurityEventListener implements
    ApplicationListener<AbstractAuthenticationEvent> {

void onApplicationEvent(AbstractAuthenticationEvent event) {

    def username = event.authentication.principal
    def address = event.authentication.details.remoteAddress
    def sessionId = event.authentication.details.sessionId

    log.info "event=${event.class.simpleName} username=${username} remoteAddress=${address} sessionId=${sessionId}"

}

 }

config.groovy：

 grails.plugin.springsecurity.useSecurityEventListener = true
 grails.plugin.springsecurity.providerNames = ['tamAuthenticationProvider']

 grails.plugin.springsecurity.userLookup.userDomainClassName = 'strobe.auth.User'
 grails.plugin.springsecurity.userLookup.authorityJoinClassName = 'strobe.auth.UserRole'
 grails.plugin.springsecurity.authority.className = 'strobe.auth.Role'
 grails.plugin.springsecurity.securityConfigType="InterceptUrlMap"
 grails.plugin.springsecurity.interceptUrlMap = [
                                            '/foobar/**':                   ['ROLE_USER']]

bootstrap.groovy：

 def init = { servletContext ->                   SpringSecurityUtils.clientRegisterFilter('tamAuthenticationFilter',
            SecurityFilterPosition.PRE_AUTH_FILTER.order + 10)
 }

---

我已经找到了问题的解决方案-我从getPreauthenticatedPrincipal（）返回了一个很长的值，这混淆了spring安全性，因为AbstractPreauthenticatedProcessingFilter中的方法requiresAuthentication（）有以下代码行：

    if ((principal instanceof String) && currentUser.getName().equals(principal)) {
        return false;
    }

它希望主体是字符串。每次我返回一个长会话，它都会重新验证并给我一个新会话

我真不敢相信解决方案竟如此简单，我花了两天时间才弄明白

我认为问题的一部分在于spring中关于预验证的文档很少，还有以下方法签名：

java.lang.Object getPreAuthenticatedPrincipal(javax.servlet.http.HttpServletRequest request)

这并不清楚地表明返回类型

java.lang.Object getPreAuthenticatedPrincipal(javax.servlet.http.HttpServletRequest request)