815989 - resolve() from nsIDNSService return null on Firefox 18 B1

Status: RESOLVED INVALID

(Firefox :: Untriaged, defect)

Description

[Cye3s]

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/17.0 Firefox/17.0
Build ID: 20121119183901

Steps to reproduce:

1.about:config and set "devtools.chrome.enabled" to true
2.Shift+F4, open Scratchpad , Alt+N to open menu ,set to "Browser"
3.paste this code:

cls = Components.classes['@mozilla.org/network/dns-service;1'];
iface = Components.interfaces.nsIDNSService;
dns = cls.getService(iface);
var a = new Array();
try {
    var nsrecord = dns.resolve(dns.myHostName, 0);
    while (nsrecord.hasMore()) {
        a[a.length] = nsrecord.getNextAddrAsString();
    }
} catch (e) { }
localip = a.join(" | ");

4.press Ctrl+L


Actual results:

return empty string:
/*

*/


Expected results:

This code works fine on 16.0.2:
/*
xxx.xxx.xxx.xxx(My Local IP) | 192.168.56.1 |....
*/

Comment 1

[Masatoshi Kimura [:emk]]

Sync resolve from main thread has been disabled.

Try:
cls = Components.classes['@mozilla.org/network/dns-service;1'];
iface = Components.interfaces.nsIDNSService;
dns = cls.getService(iface);
var a = new Array();
var listener = {
    onLookupComplete: function(request, record, status) {
        try {
            while (record.hasMore()) {
                a[a.length] = record.getNextAddrAsString();
            }
        } catch (e) { a.push(e); }
        alert(a.join(" | "));
    },
    QueryInterface: function(aIID) {
        if (aIID.equals(Ci.nsIDNSListener) ||
            aIID.equals(Ci.nsISupports)) {
            return this;
        }
        throw Cr.NS_ERROR_NO_INTERFACE;
    }
};
var threadManager = Cc["@mozilla.org/thread-manager;1"];
var mainThread = threadManager.getService(Ci.nsIThreadManager);
dns.asyncResolve(dns.myHostName, 0, listener, mainThread.currentThread);