未选中的运行时。上次错误： 无法访问 url " " 的内容。扩展清单必须请求访问此主机的权限。在清单 3 中

Question

请帮帮我！我在谷歌chrome清单3中得到了错误Unchecked runtime.lastError: Cannot access contents of url. Extension manifest must request permission to access this host.和Unchecked runtime.lastError: Could not establish connection. Receiving end does not exist.。

来自内容脚本的侦听器

chrome.runtime.onMessage.addListener(
function(req, sender, sendResponse) {
if(req.msg === "analysis background") {
let obj = parse();
sendResponse(obj);
}

return true;
}
); 
); 

manifest.json

{
"manifest_version": 3,
"name": "extensionParser",
"version": "1.0.0",
"action": { 
"default_popup": "popups/popup.html"
},
"background": {
"service_worker": "background.js"
},
"permissions": ["tabs", "scripting",
"http://localhost/site_for_parsing"]
}

来自后台文件的代码

const siteUrl = "http://localhost/site_for_parsing";
chrome.runtime.onConnect.addListener(port => {
port.onMessage.addListener(msg => {
if(msg.message === 'analysis') {
chrome.tabs.create({active: false, url: siteUrl}, tab => {
chrome.scripting.executeScript({
target: {tabId:tab.id},
files: ['dist/parser.js']
}, (results) => {
chrome.tabs.sendMessage(tab.id, {msg: "analysis background"}, res => {
port.postMessage(res)
chrome.tabs.remove(tab.id)
})
})
});
}
});
});

提前谢谢！我在等你的答案。你好！

Answer 1

1. 站点权限应添加到host_permissions，而不是permissions，更多信息
2. ManifestV3中的create+executeScript在100以上的Chrome中出现错误，因此a(返回ManifestV2直到Chrome 100稳定，或者b(使用下面的解决方法

等待设置URL：

(async () => {
const tab = await chrome.tabs.create({url: 'https://www.example.com'});
const tabId = tab.id;
if (!tab.url) await onTabUrlUpdated(tabId);
const results = await chrome.scripting.executeScript({
target: {tabId},
files: ['content.js'],
});
chrome.tabs.sendMessage(tabId, {msg: 'analysis background'}, res => {
port.postMessage(res);
chrome.tabs.remove(tabId);
});
})();
function onTabUrlUpdated(tabId) {
return new Promise((resolve, reject) => {
const onUpdated = (id, info) => id === tabId && info.url && done(true);
const onRemoved = id => id === tabId && done(false);
chrome.tabs.onUpdated.addListener(onUpdated);
chrome.tabs.onRemoved.addListener(onRemoved);
function done(ok) {
chrome.tabs.onUpdated.removeListener(onUpdated);
chrome.tabs.onRemoved.removeListener(onRemoved);
(ok ? resolve : reject)();
}
});
}