识别在Firefox插件SDK中发出请求的选项卡

Question

I'm using the Firefox Addon SDK to build something that monitors and displays the HTTP traffic in the browser. Similar to HTTPFox or Live HTTP Headers . I am interested in identifying which tab in the browser (if any) generated the request

Using the observer-service I am monitoring for "http-on-examine-response" events. I have code like the following to identify the nsIDomWindow that generated the request:

const observer = require("observer-service"),
    {Ci} = require("chrome");

function getTabFromChannel(channel) {
    try {
        var noteCB= channel.notificationCallbacks ? channel.notificationCallbacks : channel.loadGroup.notificationCallbacks;

        if (!noteCB) { return null; }

        var domWin = noteCB.getInterface(Ci.nsIDOMWindow);
        return domWin.top;
    } catch (e) {
        dump(e + "\n");
        return null;
    }
}

function logHTTPTraffic(sub, data) {
    sub.QueryInterface(Ci.nsIHttpChannel);
    var ab = getTabFromChannel(sub);
    console.log(tab);
}

observer.add("http-on-examine-response", logHTTPTraffic);

Mostly cribbed from the documentation for how to identify the browser that generated the request . Some is also taken from the Google PageSpeed Firefox addon.

Is there a recommended or preferred way to go from the nsIDOMWindow object domWin to a tab element in the SDK tabs module?

I've considered something hacky like scanning the tabs list for one with a URL that matches the URL for domWin, but then I have to worry about multiple tabs having the same URL.

Answer 1

自最初提出/回答以来，API发生了变化...现在（自1.15开始）应为：

return require("sdk/tabs/utils").getTabForWindow(domWin.top);

Answer 2

You have to keep using the internal packages. From what I can tell, getTabForWindow() function in api-utils/lib/tabs/tab.js package does exactly what you want. Untested code:

var tabsLib = require("sdk/tabs/tab.js");
return tabsLib.getTabForWindow(domWin.top);

Answer 3

As of Addon SDK version 1.13 change:

var tabsLib = require("tabs/tab.js");

to

var tabsLib = require("sdk/tabs/helpers.js");

Answer 4

If anyone still cares about this:

Although the Addon SDK is being deprecated in support of the newer WebExtensions API, I want to point out that

var a_tab = require("sdk/tabs/utils").getTabForContentWindow(window)

returns a different 'tab' object than the one you would typically get by using

worker.tab in a PageMod.

For example, a_tab will not have the 'id' attribute, but would have linkedPanel property that's similar to the 'id' attribute.