用户代理字符串检测脚本

包括检测呈现引擎、平台、windows操作系统、移动设备和游戏系统

  var client = function () {
    // 呈现引擎
    var engine = {
      ie: 0,
      gecko: 0,
      webkit: 0,
      khtml: 0,
      opera: 0,
      // 完整的版本号
      ver: null
    }
    // 浏览器
    var browser = {
      ie: 0,
      firefox: 0,
      chrome: 0,
      safari: 0,
      konq: 0,
      opera: 0,
      // 具体的版本号
      ver: null
    }
    // 平台，设备和操作系统
    var system = {
      win: false,
      mac: false,
      xll: false,
      // 移动设备
      iphone: false,
      ipod: false,
      ipad: false,
      ios: false,
      android: false,
      nokiaN: false,
      winMobile: false,
      // 游戏系统
      wii: false,
      ps: false
    }
    // 检测呈现引擎和浏览器
    var ua = navigator.userAgent
    if (window.opera) {
      engine.ver = browser.ver = window.opera.verson()
      engine.opera = browser.opera = parseFloat(engine.ver)
    } else if (/AppleWebKit\/(\S+)/.test(ua)) {
      engine.ver = RegExp["$1"]
      engine.webkit = parseFloat(engine.ver)
      // 确定是Chrome还是Safari
      if (/Chrome\/(\S+)/.test(ua)) {
        browser.ver = RegExp["$1"]
        browser.chrome = parseFloat(browser.ver)
      } else if (/Version\/(\S+)/.test(ua)) {
        browser.ver = RegExp["$1"]
        browser.safari = parseFloat(browser.ver)
      } else {
        // 近似的确定版本号
        var safariVersion = 1
        if (engine.webkit < 100) {
          safariVersion = 1
        } else if (engine.webkit < 312) {
          safariVersion = 1.2
        } else if (engine.webkit < 412) {
          safariVersion = 1.3
        } else {
          safariVersion = 2
        }
        browser.safari = browser.ver = safariVersion
      }
    } else if (/KHTML\/(\S+)/.test(ua) || /Konqueror\/([^;]+)/.test(ua)) {
      engine.ver = browser.ver = RegExp["$1"]
      engine.khtml = browser.konq = parseFloat(engine.ver)
    } else if (/rv:([^\)]+)\) Gecko\/\d{8}/.test(ua)) {
      engine.ver = RegExp["$1"]
      engine.gecko = parseFloat(engine.ver)
      // 确定是不是Firefox
      if (/Firefox\/(\S+)/.test(ua)) {
        browser.ver = RegExp["$1"]
        browser.firefox = parseFloat(browser.ver)
      }
    } else if (/MSIE ([^;]+)/.test(ua)) {
      engine.ver = browser.ver = RegExp["$1"]
      engine.ie = browser.ie = parseFloat(engine.ie)
    }
    // 检测浏览器
    browser.ie = engine.ie
    browser.opera = engine.opera
    // 检测平台
    var p = navigator.platform
    system.win = p.indexOf("Win") == 0
    system.mac = p.indexOf('Mac') == 0
    system.xll = (p == 'Xll') || (p.indexOf("Linux") == 0)
    // 检测Windows操作系统
    if (system.win) {
      if (/Win(?:dows )?([^do]{2})\s?(\d+\.\d+)?/.test(ua)) {
        if (RegExp["$1"] == "NT") {
          switch (RegExp["$2"]) {
            case "5.0":
              system.win = "2000"
              break
            case "5.1":
              system.win = "XP"
              break
            case "6.0":
              system.win = "Vista"
              break
            case "6.1":
              system.win = "7"
              break
            case "10.0":
              system.win = "10"
              break
            default:
              system.win = "NT"
              break
          }
        } else if (RegExp["$1"] == "9x") {
          system.win = "ME"
        } else {
          system.win = RegExp["$1"]
        }
      }
    }
    // 移动设备
    system.iphone = ua.indexOf("iPhone") > -1
    system.ipod = ua.indexOf("iPod") > -1
    system.ipad = ua.indexOf("iPad") > -1
    system.nokiaN = ua.indexOf("NokiaN") > -1
    // Windows mobile
    if (system.win == "CE") {
      system.winMobile = system.win
    } else if (system.win == "Ph") {
      if (/Windows Phone OS (\d+.\d+)/.test(ua)) {
        system.win = "Phone"
        system.winMobile = parseFloat(RegExp['$1'])
      } else {
        // 不能真正检测出来，所以只能猜测
        system.ios = 2
      }
    }
    // 检测IOS版本
    if (system.mac && ua.indexOf('Mobile') > -1) {
      if (/CPU (?:iPhone )?OS (\d+_\d+)/.test(ua)) {
        system.ios = parseFloat(RegExp.$1.replace('_', '.'))
      } else {
        // 不能真正检测出来，所以只能猜测
        system.ios = 2
      }
    }
    // 检测Android版本
    if (/Android(\d+\.\d+)/.test(ua)) {
      system.android = parseFloat(RegExp['$1'])
    }
    // 游戏系统
    system.wii = ua.indexOf('Wii') > -1
    system.ps = /playstation/i.test(ua)
    // 返回这些对象
    return {
      engine, browser, system
    }
  }()

本文地址：https://blog.csdn.net/weixin_43964779/article/details/109648728