如果访问者来自某个国家，是否可以运行代码？ [英] Is it possible to run code if visitor is from a certain country

问题描述

如果且仅当访问者来自某个国家时，我想运行一段代码，这是否可能，我将如何去做这件事？

解决方案

这是不可能的，但有一些东西可以用来作为访问者的原籍国的提示：

• Accept-Language HTTP头告诉你（如果有的话）用户喜欢看哪种语言 - 当然用户可以将它设置为任何他们想要的，语言不会将1：1映射到国家。


• 还有一些 Javascript对象，告诉你用户的浏览器和操作系统使用哪种语言;与上述相同的注意事项。


• 有许多 IP地理位置服务，您可以使用该服务从用户的IP地址派生地理位置。但这些有时可能不会产生任何结果或错误结果，我不确定它们中的任何一个是否可以自由使用。

I want to run a bit of code if, and only if, a visitor is from a certain country, is this possible and how would i go about doing this?

解决方案

It's not possible with any certainty, but there are a couple of things that can be used as hints towards a visitor's country of origin:

• The Accept-Language HTTP header tells you (if present) which language the user prefers to see - of course users can set this to whatever they want, and languages do not map 1:1 to countries.
• There are also a number of Javascript objects that tell you which language the user's browser and OS use; same caveats as above.
• There are a number of IP Geolocation services that you can use to derive a geographic location from the user's IP address. But these can sometimes yield no results or false results, and I'm not sure whether any of them are free to use.

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