Get current page URL from a firefox sidebar extens

问题:

I'm writing a sidebar extension for Firefox and need a way to get the URL of the current page so I can check it against a database and display the results. How can I do this?

回答1:

window.top.getBrowser().selectedBrowser.contentWindow.location.href;

might work, otherwise I think you need to use:

var mainWindow = window.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
                   .getInterface(Components.interfaces.nsIWebNavigation)
                   .QueryInterface(Components.interfaces.nsIDocShellTreeItem)
                   .rootTreeItem
                   .QueryInterface(Components.interfaces.nsIInterfaceRequestor)
                   .getInterface(Components.interfaces.nsIDOMWindow);

mainWindow.getBrowser().selectedBrowser.contentWindow.location.href;

回答2:

I stumbled over this post while looking for an answer to the same question.

Actually I think it's as easy as

alert(window.content.location.href)

See also https://developer.mozilla.org/en/DOM/window.content

回答3:

This seems to work fine for me

function getCurrentURL(){

    var currentWindow = Components.classes["@mozilla.org/appshell/window-mediator;1"].getService(Components.interfaces.nsIWindowMediator).getMostRecentWindow("navigator:browser");

    var currBrowser = currentWindow.getBrowser();
    var currURL = currBrowser.currentURI.spec;

    return currURL;
}

回答4:

https://developer.mozilla.org/En/Working_with_windows_in_chrome_code

If you need to access the main browser from the code running in a sidebar, you'll something like what Wimmel posted, except the last line could be simplified to

mainWindow.content.location.href

(alternatively you could use 's API returning an nsIURI).

Depending on your task, it might make sense to run the code in the browser window instead (e.g. in a page load handler), then it can access the current page via the content shortcut and the sidebar via document.getElementById("sidebar").contentDocument or .contentWindow.

回答5:

If you need only domain and subdomain;

Usage;

PageDomain.getDomain(); // stackoverflow.com
PageDomain.getSubDomain(); //  abc.stackoverflow.com

Code;

PageDomain = {

getDomain : function() {
    var docum = Components.classes["@mozilla.org/appshell/window-mediator;1"].getService(Components.interfaces.nsIWindowMediator).getMostRecentWindow("navigator:browser");
    var domain = PageDomain.extractDomain(new String(docum.location));
    return domain;
},
getSubDomain : function() {
    var docum = Components.classes["@mozilla.org/appshell/window-mediator;1"].getService(Components.interfaces.nsIWindowMediator).getMostRecentWindow("navigator:browser");
    var subDomain = PageDomain.extractSubDomain(new String(docum.location));
    return subDomain;
},
 extractDomain: function(host) {
        var s;

        // Credits to Chris Zarate
        host=host.replace('http:\/\/','');
        host=host.replace('https:\/\/','');
        re=new RegExp("([^/]+)");
        host=host.match(re)[1];
        host=host.split('.');

        if(host[2]!=null) {
          s=host[host.length-2]+'.'+host[host.length-1];
          domains='ab.ca|ac.ac|ac.at|ac.be|ac.cn|ac.il|ac.in|ac.jp|ac.kr|ac.nz|ac.th|ac.uk|ac.za|adm.br|adv.br|agro.pl|ah.cn|aid.pl|alt.za|am.br|arq.br|art.br|arts.ro|asn.au|asso.fr|asso.mc|atm.pl|auto.pl|bbs.tr|bc.ca|bio.br|biz.pl|bj.cn|br.com|cn.com|cng.br|cnt.br|co.ac|co.at|co.il|co.in|co.jp|co.kr|co.nz|co.th|co.uk|co.za|com.au|com.br|com.cn|com.ec|com.fr|com.hk|com.mm|com.mx|com.pl|com.ro|com.ru|com.sg|com.tr|com.tw|cq.cn|cri.nz|de.com|ecn.br|edu.au|edu.cn|edu.hk|edu.mm|edu.mx|edu.pl|edu.tr|edu.za|eng.br|ernet.in|esp.br|etc.br|eti.br|eu.com|eu.lv|fin.ec|firm.ro|fm.br|fot.br|fst.br|g12.br|gb.com|gb.net|gd.cn|gen.nz|gmina.pl|go.jp|go.kr|go.th|gob.mx|gov.br|gov.cn|gov.ec|gov.il|gov.in|gov.mm|gov.mx|gov.sg|gov.tr|gov.za|govt.nz|gs.cn|gsm.pl|gv.ac|gv.at|gx.cn|gz.cn|hb.cn|he.cn|hi.cn|hk.cn|hl.cn|hn.cn|hu.com|idv.tw|ind.br|inf.br|info.pl|info.ro|iwi.nz|jl.cn|jor.br|jpn.com|js.cn|k12.il|k12.tr|lel.br|ln.cn|ltd.uk|mail.pl|maori.nz|mb.ca|me.uk|med.br|med.ec|media.pl|mi.th|miasta.pl|mil.br|mil.ec|mil.nz|mil.pl|mil.tr|mil.za|mo.cn|muni.il|nb.ca|ne.jp|ne.kr|net.au|net.br|net.cn|net.ec|net.hk|net.il|net.in|net.mm|net.mx|net.nz|net.pl|net.ru|net.sg|net.th|net.tr|net.tw|net.za|nf.ca|ngo.za|nm.cn|nm.kr|no.com|nom.br|nom.pl|nom.ro|nom.za|ns.ca|nt.ca|nt.ro|ntr.br|nx.cn|odo.br|on.ca|or.ac|or.at|or.jp|or.kr|or.th|org.au|org.br|org.cn|org.ec|org.hk|org.il|org.mm|org.mx|org.nz|org.pl|org.ro|org.ru|org.sg|org.tr|org.tw|org.uk|org.za|pc.pl|pe.ca|plc.uk|ppg.br|presse.fr|priv.pl|pro.br|psc.br|psi.br|qc.ca|qc.com|qh.cn|re.kr|realestate.pl|rec.br|rec.ro|rel.pl|res.in|ru.com|sa.com|sc.cn|school.nz|school.za|se.com|se.net|sh.cn|shop.pl|sk.ca|sklep.pl|slg.br|sn.cn|sos.pl|store.ro|targi.pl|tj.cn|tm.fr|tm.mc|tm.pl|tm.ro|tm.za|tmp.br|tourism.pl|travel.pl|tur.br|turystyka.pl|tv.br|tw.cn|uk.co|uk.com|uk.net|us.com|uy.com|vet.br|web.za|web.com|www.ro|xj.cn|xz.cn|yk.ca|yn.cn|za.com';
          domains=domains.split('|');
          for(var i=0;i<domains.length;i++) {
            if(s==domains[i]) {
              s=host[host.length-3]+'.'+s;
              break;
            }
          }
        } else {
          s=host.join('.');
        }
        // Thanks Chris
        return s;
      },

      extractSubDomain:function(host){
          host=host.replace('http:\/\/','');
          host=host.replace('https:\/\/','');
          re=new RegExp("([^/]+)");
          host=host.match(re)[1];
          return host;
      }
}

回答6:

Hallo,

I have tried to implement this in JavaScript, because I need that in my project too, but all three possible solutions didn't work. I have also implemented a small site to test it, but this also didn't work.

Here is the source code of the small site:

<html>
<head>
<title>Test</title>
<script type="text/javascript">
function Fall1 () {

    alert(window.top.getBrowser().selectedBrowser.contentWindow.location.href);
}

function Fall2() {
var mainWindow = window.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
                   .getInterface(Components.interfaces.nsIWebNavigation)
                   .QueryInterface(Components.interfaces.nsIDocShellTreeItem)
                   .rootTreeItem
                   .QueryInterface(Components.interfaces.nsIInterfaceRequestor)
                   .getInterface(Components.interfaces.nsIDOMWindow);

alert(mainWindow.getBrowser().selectedBrowser.contentWindow.location.href);
}

function Fall3() {
alert(document.getElementById("sidebar").contentWindow.location.href);
}

</script>
</head>
<body>
<form name="Probe" action="">

<input type="button" value="Fall1"
onclick="Fall1()">

<input type="button" value="Fall2"
onclick="Fall2()">

<input type="button" value="Fall3"
onclick="Fall13()">
</form>
</body>
</html>