javascript-将控制权从弹出窗口转移到内容脚本-Google Chrome扩展程序
作者：互联网
打印屏幕以了解我的问题：link
我正在构建一个扩展程序,该扩展程序将一个按钮插入到特定网页的DOM中.该插入是通过insert.js中的injectScript()函数实现的,该函数已正确执行并正确输入了清单文件的“ content_scripts”：字段中.
injectScript()注入(当然,在当前正在加载的网页的DOM中,如果它是我要查找的页面)包含相同inject.js(包含按钮的onclick事件)的脚本标签标记,包含按钮的CSS,最重要的是,一个div,其中包含通过调用chrome.extension.sendRequest({greeting：“ dami”},function(response){…})从background.html获得的文本.通过单击我插入的按钮,该div中插入的文本可用于从网页填充其他div.
这很完美,但是我还需要解决另一个问题：
仅当chrome.tabs.onSelectionChanged,chrome.tabs.onUpdated和chrome.history.onVisited事件发生时,才会注入我注入到网页DOM中的特定文本.我还想在我的popup.html通过更改localStorage [“ builtin”]对其进行修改时重新注入该文本.所以我想要的是：当我从popup.html页面单击OK按钮时,我想使用chrome.extension.sendRequest({greeting：“ reintrodu”},function(response){…});从popup.html发送请求到管理我的第一次文本注入的相同内容脚本,但似乎不起作用.
当我单击按钮时什么也没有发生！测试警报框不显示任何内容.当我按OK按钮时,popup.html只是关闭,似乎没有发生数据交换.
这是由我的popup.html中的OK按钮触发的功能：
function closer()
{
if ($('input[name=check]').is(':checked'))
{
localStorage["builtin"] = document.getElementById("tkey_1").value;
localStorage["build"] = "true";
}
else
{
localStorage["builtin"] = document.getElementById("tkey_1").value;
localStorage["build"] = "false";
}
chrome.extension.sendRequest({greeting: "reintrodu"}, function(response)
{
alert(response.farewell);
});
window.close();
}
chrome.extension.sendRequest({greeting：“ reintrodu”},function(response){…})应将请求发送到内容脚本inject.js：
chrome.extension.onRequest.addListener(
function(request, sender, sendResponse) {
// console.log(sender.tab ? "from a content script:" + sender.tab.url : "from the extension");
if (request.greeting === "history")
{
console.log("registered in history");
sendResponse({farewell: "goodbye from history"});
PageShowHandler();
}
else if (request.greeting === "historyrem")
{
console.log("registered in historyrem");
sendResponse({farewell: "goodbye from historyrem"});
PageShowHandler();
}
else if (request.greeting === "exploit")
{
console.log("registered in exploit");
sendResponse({farewell: "goodbye from exploit"});
PageShowHandler();
}
else if (request.greeting === "reintrodu")
{
console.log("registered in reintrodu");
sendResponse({farewell: "goodbye from reintrodu"});
//PageShowHandler();
alert('prins reintrodu');
}
else if (request.greeting === "selected")
{
console.log("registered in selected");
sendResponse({farewell: "goodbye from selected"});
PageShowHandler();
}
else
sendResponse({}); // snub them.
});
这是background.html,似乎对初始注入有效,与popup.html不同：
<html>
<head>
<script type="text/javascript">
//Fired when a URL is visited, providing the HistoryItem data for that URL.
chrome.tabs.onSelectionChanged.addListener(function(tabId, selectInfo)
{
chrome.tabs.sendRequest(tabId, {greeting: "selected"}, function(response) {
console.log(response.farewell);
});
});
chrome.tabs.onUpdated.addListener(function(tabId, changeInfo, tab)
{
chrome.tabs.sendRequest(tab.id, {greeting: "exploit"}, function(response) {
console.log(response.farewell);
});
});
chrome.history.onVisited.addListener(function(result)
{
//alert(result.url);
//chrome.tabs.sendRequest(null, {greeting: "history"}, function(response) {
// console.log(response.farewell);
//});
chrome.windows.getCurrent(function(w)
{
chrome.tabs.getSelected(w.id, function (tabul)
{
//alert(tabul.id);
chrome.tabs.sendRequest(tabul.id, {greeting: "history"}, function(response) {
console.log(response.farewell);
});
});
});
});
chrome.history.onVisitRemoved.addListener(function(removed)
{
//alert(result.url);
//chrome.tabs.sendRequest(null, {greeting: "historyrem function(response) {
// console.log(response.farewell);
//});
chrome.windows.getCurrent(function(w)
{
chrome.tabs.getSelected(w.id, function (tabul)
{
//alert(tabul.id);
chrome.tabs.sendRequest(tabul.id, {greeting: "historyrem"}, function(response) {
console.log(response.farewell);
});
});
});
});
chrome.extension.onRequest.addListener(function(request, sender, sendResponse)
{
if(request.greeting == "dami")
{
if(localStorage["build"] == "true")
{
sendResponse({farewell: localStorage["builtin"]});
}
else
{
sendResponse({farewell: "textul default"});
}
}
else
{
sendResponse({farewell: "n-am ba; du-te dracu!"});
}
});
</script>
</head>
<body></body>
</html>
这是清单：
{
"name" : "gMail Adder ",
"version" : "1.0",
"description" : "Google Chrome Gmail Adder",
"options_page": "options.html",
"background_page": "background.html",
"run_at": "document_start",
"permissions": [
"tabs",
"history",
"http://*/*",
"https://*/*"
],
"content_scripts": [
{
"matches": ["*://*.google.mail.com/*", "https://*.google.mail.com/*" ,"http://mail.google.com/*" ,"https://mail.google.com/*", "https://www.google.com/*", "http://www.google.com/*", "file:///*"],
"css": ["toggle.css"],
"js": ["jquery-1.4.4.min.js", "inject.js"]
}
],
"browser_action" : {
"default_icon" : "Quest Icon 11.png",
"default_popup": "popup.html"
}
}
解决方法:
由于API调用是异步的,因此您将在关闭接收请求前的弹出窗口.
另外,如果您要将请求发送到内容脚本,则需要改用chrome.tabs.sendRequest.
因此,您的弹出窗口应如下所示：
function closer()
{
...
//todo: get tabid of a tab where the content script you are interested in is
chrome.tabs.sendRequest(tabId, {greeting: "reintrodu"}, function(response)
{
alert(response.farewell);
//closing only after receiving response
window.close();
});
}
标签：google-chrome,google-chrome-extension,javascript 来源： https://codeday.me/bug/20191208/2093325.html