在我的 background.html 中，我得到了当前选项卡的 id、url 和 title像这样:
chrome.tabs.getSelected(null, function(tab) {
tabId = tab.id;
tabUrl = tab.url
tabTitle = tab.title
...
我还需要获取当前选项卡的第一段。这可能吗？我在 tab type 中没有看到任何相关内容.谢谢
更新
响应 serg's answer 的更新并从 here 复制代码:
这是dom.js:
chrome.extension.onRequest.addListener(function(request, sender, sendResponse) {
if (request.action == "getDOM")
//sendResponse({dom: "The dommmmm that you want to get"});
sendResponse({dom: document.getElementsByTagName("body")[0]});
//sendResponse({dom: document.getElementsByTagName("p")});
else
sendResponse({}); // Send nothing..
});
这就是我在 background.html 中的内容:
// Send a request to the content script.
chrome.tabs.sendRequest(tab.id, {action: "getDOM"}, function(response) {
console.log(response.dom);
});
但似乎什么也没有发生。我什至不知道去哪里找。
更新
manifest.json:
{
"name": "My First Extension",
"version": "1.0",
"description": "The first extension that I made.",
"background_page": "background.html",
"content_scripts": [
{
"matches": ["http://*/*"],
"js": ["dom.js"]
}
],
"browser_action": {
"default_icon": "icon.png"
},
"permissions": [
"tabs",
"http://ting-1.appspot.com/submithandlertest"
]
}
更新
已插入 console.logs 用于调试，但我在控制台中看不到它们；事实上 dom.js 甚至没有运行，我将“else”拼错为“els”并且没有给出错误。但除此之外，扩展运行良好并执行 xhr 请求。我做错了什么？
dom.js
chrome.extension.onRequest.addListener(function(request, sender, sendResponse) {
if (request.action == "getDOM")
console.log("dom.js - request action")
sendResponse({dom: document.getElementsByTagName("body")[0]});
console.log("***dom.js - sendResponse***")
else
sendResponse({}); // Send nothing..
console.log("***dom.js - else***")
});
background.html
<html>
<script>
chrome.browserAction.onClicked.addListener(function(tab) {
chrome.tabs.getSelected(null, function(tab) {
// Send a request to the content script.
chrome.tabs.sendRequest(tab.id, {action: "getDOM"}, function(response) {
console.log(response.dom);
console.log("background -- where is response.dom")
});
tabId = tab.id;
console.log(tabId)
tabUrl = tab.url
console.log(tabUrl)
tabTitle = tab.title
console.log(tabTitle)
var formData = new FormData();
formData.append("url", tabUrl);
formData.append("title", tabTitle);
formData.append("pitch", "this is a note");
//formData.append("user_tag_list", "tag1, tag2");
var xhr = new XMLHttpRequest();
xhr.open("POST", "http://ting-1.appspot.com/submithandlertest", true);
xhr.onreadystatechange = function (aEvt) {
if (xhr.readyState == 4) {
if (xhr.status == 200){
console.log("request 200-OK");
chrome.browserAction.setBadgeText ( { text: "done" } );
setTimeout(function () {
chrome.browserAction.setBadgeText( { text: "" } );
}, 2000);
}else{
console.log("connection error");
chrome.browserAction.setBadgeText ( { text: "ERR" } );
}
}
};
xhr.send(formData);
console.log("tabUrl: "+ tabUrl)
console.log(formData)
});
});
</script>
</html>
编辑
按照 serg 的建议编辑 background.html，“将所有需要它的代码包装到 chrome.tabs.sendRequest 回调(所有那些 xhrs)”。但是这个版本后台不行。我没有收到任何错误消息，但什么也没发生。我做错了什么？
<html>
<script>
chrome.browserAction.onClicked.addListener(function(tab)
{
//chrome.tabs.getSelected(null, function(tab)
//{
// Send a request to the content script.
chrome.tabs.sendRequest(tab.id, {action: "getDOM"}, function(response)
{
console.log(response.dom);
console.log("background -- where is response.dom")
//}); moving this down to include xhr
tabId = tab.id;
console.log(tabId)
tabUrl = tab.url
console.log(tabUrl)
tabTitle = tab.title
console.log(tabTitle)
var formData = new FormData();
formData.append("url", tabUrl);
formData.append("title", tabTitle);
formData.append("pitch", "this is a note");
//formData.append("user_tag_list", "tag1, tag2");
//xhr*********************************************************************************
var xhr = new XMLHttpRequest();
xhr.open("POST", "http://ting-1.appspot.com/submithandlertest", true);
xhr.onreadystatechange = function (aEvt)
{
if (xhr.readyState == 4)
{
if (xhr.status == 200)
{
console.log("request 200-OK");
chrome.browserAction.setBadgeText ( { text: "done" } );
setTimeout(function ()
{
chrome.browserAction.setBadgeText( { text: "" } );
}, 2000);
}
else
{
console.log("connection error");
chrome.browserAction.setBadgeText ( { text: "ERR" } );
}
}
};
xhr.send(formData);
console.log("tabUrl: "+ tabUrl)
console.log(formData)
//xhr**********************************************************************************
}); //chrome.tabs.sendRequest
});
</script>
</html>
更新:编辑 dom.js:
chrome.extension.onRequest.addListener
(
function(request, sender, sendResponse)
{
if (request.action == "getDOM")
{
console.log("dom.js - if (request.action == getDom)")
//sendResponse({dom: "The dommmmm that you want to get"});
//sendResponse({dom: document.getElementsByTagName("body")[0]});
sendResponse({dom: document.getElementsByTagName("p")[0]});
console.log("***dom.js - sendResponse***")
//var pageInfo = {
//"title": document.title};
//chrome.extension.sendRequest(pageInfo);
}
else
{
sendResponse({}); // Send nothing..
console.log("***dom.js - else***")
}
}
);
使用最新的 background.html 更新带有显示标记的 console.log:
<html>
<script>
chrome.browserAction.onClicked.addListener(function(tab) {
chrome.tabs.getSelected(null, function(tab) {
// Send a request to the content script.
chrome.tabs.sendRequest(tab.id, {action: "getDOM"}, function(response) {
//NOT SHOWING
console.log(response.dom)
//NOT SHOWING
console.log("background -- where is response.dom")
});
tabId = tab.id;
//SHOWING
console.log(tabId)
tabUrl = tab.url
//SHOWING
console.log(tabUrl)
//SHOWING
tabTitle = tab.title
//SHOWING
console.log(tabTitle)
var formData = new FormData();
formData.append("url", tabUrl);
formData.append("title", tabTitle);
formData.append("pitch", "this is a note");
//formData.append("user_tag_list", "tag1, tag2");
var xhr = new XMLHttpRequest();
xhr.open("POST", "http://ting-1.appspot.com/submithandlertest", true);
xhr.onreadystatechange = function (aEvt) {
if (xhr.readyState == 4) {
if (xhr.status == 200){
//SHOWING
console.log("request 200-OK");
chrome.browserAction.setBadgeText ( { text: "done" } );
setTimeout(function () {
chrome.browserAction.setBadgeText( { text: "" } );
}, 2000);
}else{
//NOT SHOWING
console.log("connection error");
chrome.browserAction.setBadgeText ( { text: "ERR" } );
}
}
};
xhr.send(formData);
//SHOWING
console.log("tabUrl: "+ tabUrl)
//SHOWING
console.log(formData)
});
});
</script>
</html>
最佳答案
你不能从后台页面做到这一点，但你可以注入(inject) content script所有页面，并使用message passing按需将此信息传回后台页面。
关于javascript - 如何从具有 chrome 扩展名的事件选项卡中获取段落？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/7733205/