Is there a way to detect user agent in Rails 3.1 [duplicate]

问题

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Closed 8 years ago.

Possible Duplicate:
Auto detect mobile browser (via user-agent?)
Rails 3: HTTP_USER_AGENT

Is there a way to detect the user agent from a current visitor? I'm currently working on a project to display video files. But for the ipad, iphone / samsung galaxy tab / internet explorer / firefox. I need to display video's is there a solid way to check which browser is visiting my rails app?

Thanks guys!

回答1:

Yep, just use this

request.env["HTTP_USER_AGENT"]
#or
request.user_agent

回答2:

What about using a simple gem?

If I remember well, I used this one last time.

gem install user-agent

The same one on GitHub

I think that this is a good way to do it...

回答3:

you can do it also client site with jquery ... there is a plugin

http://plugins.jquery.com/project/client-detect

来源：https://stackoverflow.com/questions/7650799/is-there-a-way-to-detect-user-agent-in-rails-3-1