谷歌浏览器插件开发教程7

从pane发送信息到 inject.js  inject.js发送到pane

inject.js

window.addEventListener("message", function(e) {
    var info = e.data;
    var cmd = info.cmd;
    if (cmd == "sendinject") {
        var data = info.data;
        var action = data.action;
        if (action == "begin") {
            window.postMessage({
                cmd: 'sendcontentscript',
                data: {
                    action: "begin",
                    list: "开始begin了",
                }
            }, '*');
        }
        console.log(data);
    }
}, false);

contentscript

function injectCustomJs(jsPath) {
    jsPath = jsPath || 'inject.js';
    var temp = document.createElement('script');
    temp.setAttribute('type', 'text/javascript');
    // 获得的地址类似：chrome-extension://ihcokhadfjfchaeagdoclpnjdiokfakg/js/inject.js
    temp.src = chrome.extension.getURL(jsPath);
    temp.onload = function() {
        // 放在页面不好看，执行完后移除掉
        this.parentNode.removeChild(this);
    };
    document.head.appendChild(temp);
}
injectCustomJs();
// contentscript.js 发送到inject.js
// 
chrome.runtime.onMessage.addListener(function(request, sender, sendResponse) {
    window.postMessage({
        cmd: 'sendinject',
        data: request
    }, '*');
});
window.addEventListener("message", function(e) {
    var info = e.data;
    var cmd = info.cmd;
    if (cmd == "sendcontentscript") {
        var data = info.data;
        var action = data.action;
        var list = data.list;
        if (action == "begin") {
                chrome.runtime.sendMessage({
                    greeting: '你好，我是content-script呀，我主动发消息给后台！'
                }, function(response) {});
         
        }
        console.log(data);
    }
}, false);

mypane.js

setTimeout(function(){

      chrome.tabs.query({active:true, currentWindow:true}, function (tab) {//获取当前tab
            //向tab发送请求
            chrome.tabs.sendMessage(tab[0].id, { 
                action: "begin",
                list: "",
            }, function (response) {
                   //test.js的数据
                console.log(response);
            });
        })
        ;

},200)
chrome.runtime.onMessage.addListener(function(request, sender, sendResponse)
{

       $('body').html(JSON.stringify(request));
});

 其实我发现 谷歌浏览器的通信机制并不好用 上面代码是短连接的写法    我打算用websocket代替谷歌浏览器插件通信