Google App Engine：我可以通过编程方式找出这是否是默认版本吗？

Question

Is something to programmatically discover if the this request was for the default version, as opposed to another specific version set on the request. I thought there may be something like:

SystemProperty.isDefaultVersion

Answer 1

Use API provided by the new Modules functionality:

ModulesService modulesService = ModulesServiceFactory.getModulesService();
String currentModuleName = modulesService.getCurrentModule();
String version = modulesService.getDefaultVersion(currentModuleName);

Answer 2

One not so full proof way you can get around this is by checking the URL. If it matches X.name.appspot.com , it probably isn't the default version. It might be, but it's definitely not a normal user accessing your page and therefore probably a development operation.

Far from perfect, but might be enough...