title: resolve dns lookup problems in webview
body: <p>Our company's app is mainly a webview embedded in the android/iPhone native app. In some area, the dns lookup always failed which results an error in opening our webview page. </p>
  
  <p>We have found a technology called HttpDNS which can solve the pure native app's dns lookup problem, as it can send a http request by the ip(fetched from the HttpDNS) not domain, and set the domain of http header by hand. However in webview, we can't do that. </p>
  
  <p>So is there a way to solve the dns problems in webview? Thank you (We found that we can set a proxy in app which can solve the dns lookup problems but this method is not so novel. ).</p>