在 extension 裡 chrome.declarativeNetRequest 的使用方法:
https://developer.chrome.com/docs/extensions/reference/api/declarativeNetRequest
rulesets 有3種
There are three types of rulesets, managed in slightly different ways.
- Dynamic
Persist across browser sessions and extension upgrades and are managed using JavaScript while an extension is in use. - Session
Cleared when the browser shuts down and when a new version of the extension is installed. Session rules are managed using JavaScript while an extension is in use. - Static
Packaged, installed, and updated when an extension is installed or upgraded. Static rules are stored in JSON-formatted rule files and listed in the manifest file.
在使用 Dynamic 會遇到的問題就是, Persist, 在 reload extension 時, Persist 的值還有保留, 所以如果同時做2次 addRules, 就會顯示錯誤訊息:
Unchecked runtime.lastError: Rule with id 1 does not have a unique ID.
網路上的範例
chrome.declarativeNetRequest API如何使用？
https://juejin.cn/post/7131360582325780510
chrome extensions插件通过点击按钮修改浏览器UserAgent，manifest v3版本
https://blog.csdn.net/weixin_44786530/article/details/128848739
Update dynamic rules
The following example shows how to call updateDynamicRules(). The procedure for updateSessionRules() is the same.
// Get arrays containing new and old rules
const newRules = await getNewRules();
const oldRules = await chrome.declarativeNetRequest.getDynamicRules();
const oldRuleIds = oldRules.map(rule => rule.id);
// Use the arrays to update the dynamic rules
await chrome.declarativeNetRequest.updateDynamicRules({
removeRuleIds: oldRuleIds,
addRules: newRules
});如果, 直接把上面的 code 貼到 background.js 會有 2個錯, 就是無法直接使用 await, 所以要把 await 拿掉, 但是拿掉後, 還有會新的錯誤訊息:
Uncaught TypeError: oldRules.map is not a function
問題是同一個原因, 就是 promise 造成的. 解法是使用 .then() 來解決:
How Can I Access The Value Of A Promise?
https://stackoverflow.max-everyday.com/2024/01/how-can-i-access-the-value-of-a-promise/
mozilla 官方教學: declarativeNetRequest.updateDynamicRules
https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/declarativeNetRequest/updateDynamicRules
mozilla source code 範例:
let updatedRules = browser.declarativeNetRequest.updateDynamicRules(
options // object
);mozilla 完整範例:
https://github.com/mdn/webextensions-examples/tree/main/dnr-dynamic-with-options
