目前我使用addon sdk开发一个firefox扩展,它可以在不加载的情况下重定向某些请求。
例如,一个页面引用a.js(可能有这样的<script src='example.com/a.js'>
),
那么,我想将此请求重定向到example2.com/b.js
现在,nsIContentPolicy我可以阻止example.com/a.js,
但我不知道如何在阻止a.js时加载example2.com/b.js.
我的代码现在看起来像这样:
const { Cc, Ci } = require("chrome");
const xpcom = require("sdk/platform/xpcom");
const { Class } = require("sdk/core/heritage");
exports.gcleaner = Class({
extends: xpcom.Unknown,
interfaces: ["nsIContentPolicy"],
shouldLoad: function (contType, contLoc, reqOrig, ctx, typeGuess, extra) {
//https://developer.mozilla.org/en-US/docs/Mozilla/Tech/XPCOM/Reference/Interface/nsIContentPolicy#shouldLoad()
if (contType === 2) //2 means js
{
var blockReg = new RegExp('example.com/a.js');
if (contLoc['spec'].match(blockReg))
{
return Ci.nsIContentPolicy.REJECT;
};
};
return Ci.nsIContentPolicy.ACCEPT;
},
shouldProcess: function (contType, contLoc, reqOrig, ctx, mimeType, extra) {
return Ci.nsIContentPolicy.ACCEPT;
}
});
let factory = xpcom.Factory({
Component: exports.gcleaner,
description: "hello world",
contract: "@liujiacai.net/gcleaner"
});
var catman = Cc["@mozilla.org/categorymanager;1"].getService(Ci.nsICategoryManager);
catman.addCategoryEntry("content-policy", "speeding.gcleaner", factory.contract, false, true);
谢谢!
答案 0 :(得分:1)