如何在Firefox页面模式中重定向？ [英] How to make a redirect in Firefox page-mod?

问题描述

我试图将我的Google Chrome浏览器扩展程序移植到Firefox附加组件SDK，并且需要扩展程序来从我的网站过滤页面并进行重定向。例如，如果用户打开 http://example.com/special 我需要将他发送到 http://example.com/redirect 同样的浏览器选项卡。

这是我试图做到这一点的方式：

 <$ c PageMod（{
 include：*，
 contentScriptWhen：start，
 contentScript：，
 
 onAttach：function（worker）{
 if（worker.tab.url == worker.url&& 
 worker.url.indexOf（example.com/special） > -1）{
 worker.tab.url =http://example.com/redirect; 
} 
} 
}）; 
  

问题是：我的浏览器在重定向后有时会挂起（刚刚在新页面显示标签）。我在做什么错了？

使用Firefox 16.0.2，附加SDK 1.11

最好的办法是在较低层次上完成：

  const {Cc，Ci，Cr} = require（chrome）; 
 
 var events = require（sdk / system / events）; 
 var utils = require（sdk / window / utils）; 
 
 
函数监听器（事件）{
 var channel = event.subject.QueryInterface（Ci.nsIHttpChannel）; 
 var url = event.subject.URI.spec; 
 
 //在这里你应该评估网址，并决定是否重定向或不。 
 //注意shouldIredirect和newUrl是你必须替换的猜测对象！ 
 if（shouldIredirect）{
 //如果你想重定向到另一个url，你必须中止当前的请求
 //见https://developer.mozilla.org/en- US / docs / XUL / School_tutorial / Intercepting_Page_Loads 
 channel.cancel（Cr.NS_BINDING_ABORTED）; 
 
 //获取当前的gbrowser对象（因为用户可能有多个窗口和选项卡）并加载固定的URI 
 var gBrowser = utils.getMostRecentBrowserWindow（）。gBrowser; 
 var domWin = channel.notificationCallbacks.getInterface（Ci.nsIDOMWindow）; 
 var browser = gBrowser.getBrowserForDocument（domWin.top.document）; 
 
 browser.loadURI（newUrl）; 
} else {
 //什么也不做，让Firefox继续正常流程
} 
}; 
}; 
 
 exports.main = function（）{
 events.on（http-on-modify-request，listener）; 
}; 
  

如果您想在actiton中查看此代码，请查看这个插件（免责声明：这是一个插件我开发）。

I'm trying to port my Google Chrome extension to Firefox Add-On SDK and I need the extension to filter pages from my website and make redirects. For example, if the user opens "http://example.com/special" I need to send him to "http://example.com/redirect" in the same browser tab.

This is how I tried to do this:

var pageMod = require("page-mod").PageMod({
    include: "*",
    contentScriptWhen: "start",
    contentScript: "",

    onAttach: function(worker) {
       if (worker.tab.url == worker.url && 
           worker.url.indexOf("example.com/special") > -1) {
           worker.tab.url = "http://example.com/redirect";
       }
    }
});

Problem is: my browser hangs sometimes after the redirect (immediately after the new page has been displayed in a tab). What am I doing wrong?

Using Firefox 16.0.2, Add-On SDK 1.11

解决方案

The best way will be to do it at the lower level:

const { Cc, Ci, Cr } = require("chrome");

var events = require("sdk/system/events");
var utils = require("sdk/window/utils");


function listener(event) {
    var channel = event.subject.QueryInterface(Ci.nsIHttpChannel);
    var url = event.subject.URI.spec;

    // Here you should evaluate the url and decide if make a redirect or not.
    // Notice that "shouldIredirect" and "newUrl" are guessed objects you must replace!
    if (shouldIredirect) {
      // If you want to redirect to another url, the you have to abort current request
      // See https://developer.mozilla.org/en-US/docs/XUL/School_tutorial/Intercepting_Page_Loads
      channel.cancel(Cr.NS_BINDING_ABORTED);

      // Aet the current gbrowser object (since the user may have several windows and tabs) and load the fixed URI
      var gBrowser = utils.getMostRecentBrowserWindow().gBrowser;
      var domWin = channel.notificationCallbacks.getInterface(Ci.nsIDOMWindow);
      var browser = gBrowser.getBrowserForDocument(domWin.top.document);

      browser.loadURI(newUrl);
    } else {
      // do nothing, let Firefox keep going on the normal flow
    }
  };
};

exports.main = function() {
  events.on("http-on-modify-request", listener);
};

If you want to see this code in actiton, take a look at this addon (DISCLAIMER: it's an addon I developed).

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