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package uasurfer
import (
"strings"
)
// Browser struct contains the lowercase name of the browser, along
// with its browser version number. Browser are grouped together without
// consideration for device. For example, Chrome (Chrome/43.0) and Chrome for iOS
// (CriOS/43.0) would both return as "chrome" (name) and 43.0 (version). Similarly
// Internet Explorer 11 and Edge 12 would return as "ie" and "11" or "12", respectively.
// type Browser struct {
// Name BrowserName
// Version struct {
// Major int
// Minor int
// Patch int
// }
// }
// Retrieve browser name from UA strings
func (u *UserAgent) evalBrowserName(ua string) bool {
// Blackberry goes first because it reads as MSIE & Safari
if strings.Contains(ua, "blackberry") || strings.Contains(ua, "playbook") || strings.Contains(ua, "bb10") || strings.Contains(ua, "rim ") {
u.Browser.Name = BrowserBlackberry
return u.isBot()
}
if strings.Contains(ua, "applewebkit") {
switch {
case strings.Contains(ua, "opr/") || strings.Contains(ua, "opios/"):
u.Browser.Name = BrowserOpera
case strings.Contains(ua, "silk/"):
u.Browser.Name = BrowserSilk
case strings.Contains(ua, "edge/") || strings.Contains(ua, "iemobile/") || strings.Contains(ua, "msie "):
u.Browser.Name = BrowserIE
case strings.Contains(ua, "ucbrowser/") || strings.Contains(ua, "ucweb/"):
u.Browser.Name = BrowserUCBrowser
// Edge, Silk and other chrome-identifying browsers must evaluate before chrome, unless we want to add more overhead
case strings.Contains(ua, "chrome/") || strings.Contains(ua, "crios/") || strings.Contains(ua, "chromium/") || strings.Contains(ua, "crmo/"):
u.Browser.Name = BrowserChrome
case strings.Contains(ua, "android") && !strings.Contains(ua, "chrome/") && strings.Contains(ua, "version/") && !strings.Contains(ua, "like android"):
// Android WebView on Android >= 4.4 is purposefully being identified as Chrome above -- https://developer.chrome.com/multidevice/webview/overview
u.Browser.Name = BrowserAndroid
case strings.Contains(ua, "fxios"):
u.Browser.Name = BrowserFirefox
case strings.Contains(ua, " spotify/"):
u.Browser.Name = BrowserSpotify
// AppleBot uses webkit signature as well
case strings.Contains(ua, "applebot"):
u.Browser.Name = BrowserAppleBot
// presume it's safari unless an esoteric browser is being specified (webOSBrowser, SamsungBrowser, etc.)
case strings.Contains(ua, "like gecko") && strings.Contains(ua, "mozilla/") && strings.Contains(ua, "safari/") && !strings.Contains(ua, "linux") && !strings.Contains(ua, "android") && !strings.Contains(ua, "browser/") && !strings.Contains(ua, "os/"):
u.Browser.Name = BrowserSafari
// if we got this far and the device is iPhone or iPad, assume safari. Some agents don't actually contain the word "safari"
case strings.Contains(ua, "iphone") || strings.Contains(ua, "ipad"):
u.Browser.Name = BrowserSafari
// Google's search app on iPhone, leverages native Safari rather than Chrome
case strings.Contains(ua, " gsa/"):
u.Browser.Name = BrowserSafari
default:
goto notwebkit
}
return u.isBot()
}
notwebkit:
switch {
case strings.Contains(ua, "msie") || strings.Contains(ua, "trident"):
u.Browser.Name = BrowserIE
case strings.Contains(ua, "gecko") && (strings.Contains(ua, "firefox") || strings.Contains(ua, "iceweasel") || strings.Contains(ua, "seamonkey") || strings.Contains(ua, "icecat")):
u.Browser.Name = BrowserFirefox
case strings.Contains(ua, "presto") || strings.Contains(ua, "opera"):
u.Browser.Name = BrowserOpera
case strings.Contains(ua, "ucbrowser"):
u.Browser.Name = BrowserUCBrowser
case strings.Contains(ua, "applebot"):
u.Browser.Name = BrowserAppleBot
case strings.Contains(ua, "baiduspider"):
u.Browser.Name = BrowserBaiduBot
case strings.Contains(ua, "adidxbot") || strings.Contains(ua, "bingbot") || strings.Contains(ua, "bingpreview"):
u.Browser.Name = BrowserBingBot
case strings.Contains(ua, "duckduckbot"):
u.Browser.Name = BrowserDuckDuckGoBot
case strings.Contains(ua, "facebot") || strings.Contains(ua, "facebookexternalhit"):
u.Browser.Name = BrowserFacebookBot
case strings.Contains(ua, "googlebot"):
u.Browser.Name = BrowserGoogleBot
case strings.Contains(ua, "linkedinbot"):
u.Browser.Name = BrowserLinkedInBot
case strings.Contains(ua, "msnbot"):
u.Browser.Name = BrowserMsnBot
case strings.Contains(ua, "pingdom.com_bot"):
u.Browser.Name = BrowserPingdomBot
case strings.Contains(ua, "twitterbot"):
u.Browser.Name = BrowserTwitterBot
case strings.Contains(ua, "yandex") || strings.Contains(ua, "yadirectfetcher"):
u.Browser.Name = BrowserYandexBot
case strings.Contains(ua, "yahoo"):
u.Browser.Name = BrowserYahooBot
case strings.Contains(ua, "phantomjs"):
u.Browser.Name = BrowserBot
default:
u.Browser.Name = BrowserUnknown
}
return u.isBot()
}
// Retrieve browser version
// Methods used in order:
// 1st: look for generic version/#
// 2nd: look for browser-specific instructions (e.g. chrome/34)
// 3rd: infer from OS (iOS only)
func (u *UserAgent) evalBrowserVersion(ua string) {
// if there is a 'version/#' attribute with numeric version, use it -- except for Chrome since Android vendors sometimes hijack version/#
if u.Browser.Name != BrowserChrome && u.Browser.Version.findVersionNumber(ua, "version/") {
return
}
switch u.Browser.Name {
case BrowserChrome:
// match both chrome and crios
_ = u.Browser.Version.findVersionNumber(ua, "chrome/") || u.Browser.Version.findVersionNumber(ua, "crios/") || u.Browser.Version.findVersionNumber(ua, "crmo/")
case BrowserIE:
if u.Browser.Version.findVersionNumber(ua, "msie ") || u.Browser.Version.findVersionNumber(ua, "edge/") {
return
}
// get MSIE version from trident version https://en.wikipedia.org/wiki/Trident_(layout_engine)
if u.Browser.Version.findVersionNumber(ua, "trident/") {
// convert trident versions 3-7 to MSIE version
if (u.Browser.Version.Major >= 3) && (u.Browser.Version.Major <= 7) {
u.Browser.Version.Major += 4
}
}
case BrowserFirefox:
_ = u.Browser.Version.findVersionNumber(ua, "firefox/") || u.Browser.Version.findVersionNumber(ua, "fxios/")
case BrowserSafari: // executes typically if we're on iOS and not using a familiar browser
u.Browser.Version = u.OS.Version
// early Safari used a version number +1 to OS version
if (u.Browser.Version.Major <= 3) && (u.Browser.Version.Major >= 1) {
u.Browser.Version.Major++
}
case BrowserUCBrowser:
_ = u.Browser.Version.findVersionNumber(ua, "ucbrowser/")
case BrowserOpera:
_ = u.Browser.Version.findVersionNumber(ua, "opr/") || u.Browser.Version.findVersionNumber(ua, "opios/") || u.Browser.Version.findVersionNumber(ua, "opera/")
case BrowserSilk:
_ = u.Browser.Version.findVersionNumber(ua, "silk/")
case BrowserSpotify:
_ = u.Browser.Version.findVersionNumber(ua, "spotify/")
}
}
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