Question

我正在开发一个java play framework 2.4.x项目。

我在application.conf文件中有这段代码：

play.i18n.langs = [ "en-US", "th-TH"]

在我使用play framework 1.2.x中的以下代码之前

application.langs = us_en,th_th

我想要的是让它在Play框架2.4.x中工作，如果langs采用这种格式＆＃34; us_en，th_th ＆＃34;。

我认为我需要有一个控制器来使其工作，但我不知道如何。感谢您的帮助！谢谢。

Answer 1

在迁移的情况下，您可以编写将使用旧cookie并修复它们的代码，因此一段时间后您将删除该迁移代码。

示例是

class HomeController @Inject()(val messagesApi: MessagesApi) extends Controller with I18nSupport{
  lazy val langCookieName = messagesApi.langCookieName
  lazy val defaultLang = "en-US"

  def index = Action { request => {
    // Read the cookie
    val langCookie = request.cookies.get(langCookieName)

    // Detect the old cookie
    if(langCookie.contains("_")){

      // Fix it, "us_en,th_th"  =>  "en-us", "th-th"
      val langCookieFixed = langCookie.map(_.value.replace("_", "-")).getOrElse(defaultLang)

      // implicit here to put language in the context, so template take it in the current request
      implicit val lang = Lang(langCookieFixed)

      // Draw request and change the cookie to fixed version
      Ok(views.html.index("Your new application is ready.")).withLang(lang)
    }else{
      Ok(views.html.index("Your new application is ready."))
    }
  }}

在这种情况下，您计划始终接收旧格式，最好编写动作组合：

class HomeController @Inject()(val messagesApi: MessagesApi) 
  extends Controller with I18nSupport with Play1Actions {

  def index = Play1LanguageAction { request => {
     Ok(views.html.index("Your new application is ready."))
  }}
}

// Trait here is for injection of MessagesApi
trait Play1Actions {

  // We need MessagesApi for getting language cookie name
  def messagesApi: MessagesApi

  lazy val langCookieName = messagesApi.langCookieName
  lazy val defaultLang = "en-US"

  // Action composition
  object Play1LanguageAction extends ActionBuilder[Request] {

    def invokeBlock[A](request: Request[A], block: (Request[A]) => Future[Result]) = {

      // Override request with the new, fixed acceprted languages
      val play1Request = new WrappedRequest[A](request) {

        // Read the cookie
        val langCookie = request.cookies.get(langCookieName)

        // Fix it, "us_en,th_th"  =>  "en-us", "th-th"
        val langCookieFixed = langCookie.map(_.value.replace("_", "-")).getOrElse(defaultLang)
        val lang = Lang(langCookieFixed)

        // Override default accepted languages
        override lazy val acceptLanguages = Seq(lang)
      }

      // Do the next action with the owerrided request
      block(play1Request)
    }
  }
}

您也可以重写i18n模块，因此它可以与＆＃34; us_en，th_th＆＃34; ＆＃34;本地＆＃34;，但它还有更多工作要做。这是最初的实现：

https://github.com/playframework/playframework/tree/2.5.x/framework/src/play/src/main/scala/play/api/i18n

如何在play framework 2.4.x中修改java play i18n lang？

1 个答案: