 class LanguageHandler(webapp2.RequestHandler):
     def dispatch(self):
         request = self.request
         args = request.route_args
         if len(args) and args[0] in ['en','fr']:
             self.language = args[0]
             request.route_args = args[1:]
         try:
             # Dispatch the request.
             webapp2.RequestHandler.dispatch(self)
         finally:
             # The web page response Header will now include the 2 letter language code...
             self.response.headers['Content-Language'] = str(self.language)

 class HomePage(LanguageHandler):
     def get(self):
         # self.language is now 'en' or 'fr'
         # ...code goes here...

 app = webapp2.WSGIApplication([
     (r'/(en|fr)', HomePage),
 ], debug = True)

I just wanted to point out that this could also be done with a prefix in the url.
Like these:

www.site.com/en/rest_of_url

www.site.com/fr/rest_of_url

the app would be setup like this:

 class LanguageHandler(webapp2.RequestHandler):
     def dispatch(self):
         request = self.request
         args = request.route_args
         if len(args) and args[0] in ['en','fr']:
             self.language = args[0]
             request.route_args = args[1:]
         try:
             # Dispatch the request.
             webapp2.RequestHandler.dispatch(self)
         finally:
             # The web page response Header will now include the 2 letter language code...
             self.response.headers['Content-Language'] = str(self.language)

 class HomePage(LanguageHandler):
     def get(self):
         # self.language is now 'en' or 'fr'
         # ...code goes here...

 app = webapp2.WSGIApplication([
     (r'/(en|fr)', HomePage),
 ], debug = True)

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油饼 2024-10-07 00:38:25

从发展的角度来看，这三种都是可能的。 “域名扩展”模型可能会被证明是昂贵的，并且可能是不可能的，具体取决于您的资源和您希望支持的语言 - 例如，.fr 仅限于法国境内的居民或实体。

“第一个文件夹”模型的编程可能并不困难。设置处理程序时，您可以执行以下操作：

application = webapp.WSGIApplication(
[
  ('/(en|fr|de)/', IndexController),
]

然后将语言标识符作为第一个参数显式传递给处理程序。

正如您所指出的，从 url 的角度来看，子域将是最干净的。正如 PythonRuntime 环境文档中所述，您可以将多个子域映射到相同的应用程序 - 事实上托管应用程序都会响应 [anything].[应用程序名称].appspot.com。可以从请求对象中提取用于访问的主机。

总的来说，这似乎更多的是个人偏好。

All three of those are possibilities from a development standpoint. The "domain extension" model is likely to prove to be expensive and possibly impossible depending on your resources and the languages you wish to support - .fr for example is restricted to only residents or entities with a French presence.

The "first folder" model may not be that difficult to program for. When setting up your handlers, you could do something like this:

application = webapp.WSGIApplication(
[
  ('/(en|fr|de)/', IndexController),
]

Which would then explicitly pass the language identifier in as the first parameter to the handler.

Subdomains, as you pointed out, are going to be the cleanest from a url perspective. As noted in the PythonRuntime Environment docs you can map multiple subdomains to the same application - in fact hosted applications will all respond to [anything].[application name].appspot.com. The host used for access can be extracted from the request object.

Overall it seems like more of a personal preference than anything else.

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