javascript - 如何记录301重定向URL？

Question

我输入浏览此链接 https://google.com.vn ;谷歌重定向到https://www.google.com.vn ;我想要警报完整网址重定向。我使用了这段代码:

 processNewURL: function(aURI) {
       var tabIndex = gBrowser.tabContainer.selectedIndex;
       var referredFromURI = gBrowser.tabContainer.childNodes[tabIndex].linkedBrowser.webNavigation.referringURI.spec;
        alert(referredFromURI);
},

但它总是警报https://www.google.com.vn ,我用一些短链接示例进行了测试 bit.ly/R9j52J 。不行。请帮我。

Answer 1

这可行，我还展示了 2 种访问 webNavigation 的方法。第二种方法只是冗长地教其他东西，推荐的方法是方法1。

var processNewURL = function(e) {
  console.log('e:', e);
       var win = e.originalTarget.defaultView;

     //start - method 1 to get to webNav:
     var webNav = win.QueryInterface(Ci.nsIInterfaceRequestor)
.getInterface(Ci.nsIWebNavigation);
     var referredFromURI = webNav.referringURI;
     //end - method 1

     //start - method 2 long winded way:
     /*
       var domWin = win.QueryInterface(Ci.nsIInterfaceRequestor)
                         .getInterface(Ci.nsIWebNavigation)
                         .QueryInterface(Ci.nsIDocShellTreeItem)
                         .rootTreeItem
                         .QueryInterface(Ci.nsIInterfaceRequestor)
                         .getInterface(Ci.nsIDOMWindow);
       var tab = domWin.gBrowser._getTabForContentWindow(win);
       //console.log('tab:', tab);
       var referredFromURI = tab.linkedBrowser.webNavigation.referringURI;
       */
     //end - method 2

     if (referredFromURI != null) {
          win.alert('referred from:' + referredFromURI.spec);
     } else {
          win.alert('not redirected');
     }
}

gBrowser.addEventListener('DOMContentLoaded', processNewURL, false);