在chrome扩展中传递同步消息？ [英] Synchronous message passing in chrome extensions?

问题描述

我试图阻止脚本文件在用户定义的网站上加载。要阻止脚本文件，我在内容脚本中使用 beforeload事件和 event.preventDefault（）; 只要我已经知道网站列表。我的问题是我不提前知道网站列表，所以要获取网站列表，我正在向后台页面发送请求，但响应是异步的并且不可用。

I'm trying to block a script file from loading on user defined websites. To block a script file I'm using beforeload event and event.preventDefault(); in content script which works fine as long as I already know website list. My problem is I don't know website list in advance, so to get the website list I'm sending a request to background page but response is asynchronous and unusable.

是否有任何同步邮件在Chrome扩展程序中传递，我可能在Google的文档中遗漏了？

Is there any synchronous message passing in Chrome Extensions that I possibly missed in Google's docs?

// my (simplified) code from content script:
document.addEventListener("beforeload", function(event)
{
  chrome.extension.sendRequest({fnc:"is_owner"}, function(response)
  {
    // asynchronous response is not usable because
    // all scripts have already been loaded
    if (response.is_owner) event.preventDefault();
  });
}, true);

推荐答案

很遗憾没有。有关于缺少同步消息传递的错误报告，也许如果有足够多的人出演，他们会做点什么。

Unfortunately there isn't. There is a bug report opened about lack of synchronous message passing, maybe if enough people star it they will do something about it.

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