play for scala 实现SessionFilter 过滤未登录用户跳转到登录页面
一、编写SessionFilter.scala代码
packagefilters
importjavax.inject.{Inject,Singleton}
importakka.stream.Materializer
importcontrollers.routes
importplay.api.mvc.{Filter,RequestHeader,Result,Results}
importscala.concurrent.Future
@Singleton
classSessionFilter@Inject()(implicitvalmat:Materializer)extendsFilter{
defapply(nextFilter:RequestHeader=>Future[Result])
(requestHeader:RequestHeader):Future[Result]={
if(!requestHeader.session.get("user").isDefined&&!requestHeader.path.contains("/signin")&&!requestHeader.path.contains("/assets/")){
Future.successful(Results.Redirect(routes.SignController.showSignin()))
}else{
nextFilter(requestHeader)
}
}
}
说明：
!requestHeader.session.get("user").isDefined是用来判断session中是否存在user
!requestHeader.path.contains("/signin")是用来排除登录页面，这个页面不登录也应该是可见的，防止出现死循环跳转
!requestHeader.path.contains("/assets/")是用来排除静态资源文件的，如图片、css、JavaScript等
二、在app目录下的Filters.scala中使用SessionFilter
Filters.scala这个文件是activator自动生成的模板，要使用SessionFilter只要在里面加上sessionFilter:SessionFilter和Seq(sessionFilter)就可以了
importjavax.inject._
importfilters.{ExampleFilter,SessionFilter}
importplay.api._
importplay.api.http.HttpFilters
importplay.api.mvc._
/**
*Thisclassconfiguresfiltersthatrunoneveryrequest.This
*classisqueriedbyPlaytogetalistoffilters.
*
*Playwillautomaticallyusefiltersfromanyclasscalled
*`Filters`thatisplacedtherootpackage.Youcanloadfilters
*fromadifferentclassbyaddinga`play.http.filters`settingto
*the`application.conf`configurationfile.
*
*@paramenvBasicenvironmentsettingsforthecurrentapplication.
*@paramexampleFilterAdemonstrationfilterthataddsaheaderto
*eachresponse.
*/
@Singleton
classFilters@Inject()(
env:Environment,
exampleFilter:ExampleFilter,sessionFilter:SessionFilter)extendsHttpFilters{
overridevalfilters={
//Usetheexamplefilterifwe'rerunningdevelopmentmode.If
//we'rerunninginproductionortestmodethendon'tuseany
//filtersatall.
if(env.mode==Mode.Dev)Seq(exampleFilter)elseSeq.empty
Seq(sessionFilter)
}
}
以上所述是小编给大家介绍的playforscala实现SessionFilter过滤未登录用户跳转到登录页面，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对毛票票网站的支持！