Does UIWebView send the same User-Agent in the Req

问题:

Sorry, I would just test this myself, but I'm currently without my mac. Does a web request made inside of a UIWebView send the same user-agent info that a web request made from mobile Safari would?

回答1:

Web requests made from UIWebView will not include the word "Safari" in the User Agent string. Web requests made from Mobile Safari will. This is the best way I have found for determining of a request is coming from within an app or from Mobile Safari.

Sample User Agent from UIWebView within App:

User-Agent: Mozilla/5.0 (iPad; U; CPU OS 4_3_2 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Mobile

Sample User Agent from Mobile Safari:

User-Agent: Mozilla/5.0 (iPad; U; CPU OS 4_3_2 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8H7 Safari

回答2:

Standalone mobile Safari user agent strings contain the word 'Version', whereas uiWebView user agent strings do not. So, the detection script can be modified to work with the latest version of iOS like so:

var is_uiwebview = /(iPhone|iPod|iPad).*AppleWebKit(?!.*Version)/i.test(navigator.userAgent);