ruby中获取浏览器以及系统平台信息

首先写一个类，用来封装获取系统平台以及浏览器信息的方法

 

class Info
  attr_accessor :env, :browser, :platform

  def initialize(request)
    self.env = request
    get_platform
    get_browser
  end

  protected
  #获取系统平台
  def get_platform
    begin
      if self.env['HTTP_USER_AGENT'] =~ /Win/i
        self.platform = "Windows"
      elsif self.env['HTTP_USER_AGENT'] =~ /Mac/i
        self.platform = "Mac"
      elsif self.env['HTTP_USER_AGENT'] =~ /BSD/i
        self.platform = "FreeBSD";
      elsif self.env['HTTP_USER_AGENT'] =~ /Linux/i
        self.platform = "Linux";
      elsif self.env['HTTP_USER_AGENT'] =~ /SunOS/i
        self.platform = "Sun Solaris";
      elsif  self.env["HTTP_USER_AGENT"] =~ /iPhone/i
        self.platform = "iPhone";
      else
        self.platform = nil
      end
    rescue
      self.platform = nil
    end
  end

  #获取浏览器信息
  def get_browser
    self.browser = {
      :type => nil,
      :version => nil
    }
    begin
      #Internet Exlorer
      if self.env['HTTP_USER_AGENT'] =~ /MSIE/i && self.env['HTTP_USER_AGENT'].scan(/AOL|America Online Browser/i).empty?
        browser[:type] = "MSIE";
        browser[:version] = self.env['HTTP_USER_AGENT'].scan(/MSIE ([\d\.]+)/i).to_s
        #Firefox/Firebird/Phoenix
      elsif self.env['HTTP_USER_AGENT'] =~ /Firefox|Firebird|Phoenix/i
        browser[:type] = "Firefox";
        browser[:version] = self.env['HTTP_USER_AGENT'].scan(/[Firefox|Firebird|Phoenix].\/(\d.+)/i).to_s
        #Galeon
      elsif self.env['HTTP_USER_AGENT'] =~ /Galeon/i
        browser[:type] = "Galeon";
        browser[:version] = self.env['HTTP_USER_AGENT'].scan(/Galeon\/([\d\.]+)/i).to_s
        #Safari
      elsif self.env['HTTP_USER_AGENT'] =~ /Safari/i
        browser[:type] = "Safari";
        browser[:version] = '0'
        #Opera
      elsif self.env['HTTP_USER_AGENT'] =~ /Opera/i
        browser[:type] = "Opera";
        browser[:version] = self.env['HTTP_USER_AGENT'].scan(/Opera[ |\/]([\d\.]+)/i).to_s
        #AOL/America Online Browser
      elsif self.env['HTTP_USER_AGENT'] =~ /AOL|America Online Browser/i
        browser[:type] = "AOL"
        browser[:version] = if self.env['HTTP_USER_AGENT'] =~ /AOL/i
          self.env['HTTP_USER_AGENT'].scan(/AOL[ |\/]([\d.]+)/i).uniq.to_s
        else
          self.env['HTTP_USER_AGENT'].scan(/America Online Browser ([\d\.]+)/i).to_s
        end
        #Camino
      elsif self.env['HTTP_USER_AGENT'] =~ /Camino/i
        browser[:type] = "Camino";
        browser[:version] = self.env['HTTP_USER_AGENT'].scan(/Camino\/([\d\.]+)/i).to_s
        #Konqueror
      elsif self.env['HTTP_USER_AGENT'] =~ /Konqueror/i
        browser[:type] = "Konqueror";
        browser[:version] = self.env['HTTP_USER_AGENT'].scan(/Konqueror\/([\d.]+)/i).to_s
        #K-Meleon
      elsif self.env['HTTP_USER_AGENT'] =~ /K-Meleon/i
        browser[:type] = "K-Meleon";
        browser[:version] = self.env['HTTP_USER_AGENT'].scan(/K-Meleon\/([\d.]+)/i).to_s
        #Firefox BonEcho
      elsif self.env['HTTP_USER_AGENT'] =~ /BonEcho/i
        browser[:type] = "Firefox BonEcho";
        browser[:version] = self.env['HTTP_USER_AGENT'].scan(/BonEcho\/([\d.]+)/i).to_s
        #Netscape
      elsif self.env['HTTP_USER_AGENT'] =~ /Netscape/i
        browser[:type] = "Netscape";
        browser[:version] = self.env['HTTP_USER_AGENT'].scan(/Netscape\/([\d.]+)/i).to_s
        #PSP
      elsif self.env['HTTP_USER_AGENT'] =~ /PlayStation Portable/i
        browser[:type] = "PlayStation Portable (PSP)";
        browser[:version] = self.env['HTTP_USER_AGENT'].scan(/PlayStation Portable\); ([\d\.]+)/i).to_s
        #PlayStation 3
      elsif self.env['HTTP_USER_AGENT'] =~ /PlayStation 3/i
        browser[:type] = "PlayStation 3";
        browser[:version] = self.env['HTTP_USER_AGENT'].scan(/PlayStation 3; ([\d\.]+)/i).to_s
        #Lynx
      elsif self.env['HTTP_USER_AGENT'] =~ /Lynx/i
        browser[:type] = "Lynx";
        browser[:version] = self.env['HTTP_USER_AGENT'].scan(/Lynx\/([\d\.]+)/i).to_s
      else
        browser[:type] = nil
        browser[:version] = nil
      end
    rescue
      browser[:type] = nil
      browser[:version] = nil
    end
  end

end

 

然后在application.rb中定义三个方法，分别用来获取浏览器的类型、版本以及系统平台

 

  def which_browser
    get_data
    return session[:info][:browser_type]
  end

  def which_browser_version
    get_data
    return session[:info][:browser_version]
  end

  def which_platform
    get_data
    return session[:info][:platform]
  end

  protected
  def get_data
    if session[:info].blank?
      info = Info.new(request.env)
      session[:info] = {}
      session[:info][:browser_type] = info.browser[:type]
      session[:info][:browser_version] = info.browser[:version]
      session[:info][:platform] = info.platform
    end
  end

 

以下是具体调用方法：

 

def info
    which_browser  #=> MSIE
    which_browser_version  #=> 7.0
    which_platform  #=> Windows
end

 

可以很容易的扩展Info类，从而增加新的功能。

试试看, 正需要

PHP下用 browscap.ini, ruby下有没有对应类库阿？

一堆的elsif，还有不厌其烦地重复self.env['HTTP_USER_AGENT']...您这是在虐待键盘吧？