添加 Content-Security-Policy

Signed-off-by: 迷渡 <[email protected]>

Author: justjavac

README.md

@@ -18,14 +18,14 @@ Replace Google CDN
 
 ## 原理
 
-目前国内 CDN 使用的[中科大](http://lug.ustc.edu.cn)源。
-
 此插件/扩展包括：
 
 1. `ajax.googleapis.com` - 前端公共库
 1. `fonts.googleapis.com` - 免费字体库
 1. `themes.googleusercontent.com` - fonts 有时会使用到这个里面的资源
+1. `fonts.gstatic.com` - 免费字体库
 1. `www.google.com/recaptcha` - Google 图像验证库
+1. `secure.gravatar.com` - gravatar 头像
 
 ## 安装
 

chrome/js/background.js

@@ -1,19 +1,55 @@
+/**
+ * @type {Map<string, boolean>}
+ */
+const tabinfo = new Map();
+
+/**
+ * 扫描响应头，是否含有 Content-Security-Policy
+ * @param {object[]} headers
+ * @returns {boolen}
+ */
+function hasCSP(headers) {
+    return headers.some(x => x.name.toLowerCase() === 'content-security-policy')
+};
+
+chrome.webRequest.onHeadersReceived.addListener(
+    function (details) {
+        tabinfo.set(details.tabId, hasCSP(details.responseHeaders))
+    },
+    {
+        urls: ['<all_urls>'],
+        types: ['main_frame'],
+    },
+    ['responseHeaders']
+);
+
 chrome.webRequest.onBeforeRequest.addListener(
-    function(request) {
-        var url = request.url.replace('http://', 'https://')
-        url = url.replace('googleapis.com', 'proxy.ustclug.org');
-        url = url.replace('themes.googleusercontent.com', 'google-themes.lug.ustc.edu.cn');
-        url = url.replace('fonts.gstatic.com', 'fonts-gstatic.lug.ustc.edu.cn');
-        url = url.replace('www.google.com/recaptcha/','www.recaptcha.net/recaptcha/');
-        return {redirectUrl: url};
+    function (details) {
+        if (tabinfo.get(details.tabId)) {
+            return details.url;
+        }
+        let url = details.url.replace('http://', 'https://')
+        url = url.replace('ajax.googleapis.com', 'ajax.loli.net');
+        url = url.replace('fonts.googleapis.com', 'fonts.loli.net');
+        url = url.replace('themes.googleusercontent.com', 'themes.loli.net');
+        url = url.replace('fonts.gstatic.com', 'gstatic.loli.net');
+        url = url.replace('www.google.com/recaptcha/', 'www.recaptcha.net/recaptcha/');
+        url = url.replace('secure.gravatar.com', 'gravatar.loli.net');
+        return { redirectUrl: url };
     },
     {
         urls: [
             "*://ajax.googleapis.com/*",
+            "*://fonts.googleapis.com/*",
             "*://themes.googleusercontent.com/*",
             "*://fonts.gstatic.com/*",
-            "*://www.google.com/recaptcha/*"
+            "*://www.google.com/recaptcha/*",
+            "*://secure.gravatar.com/*",
         ]
     },
     ["blocking"]
 );
+
+chrome.tabs.onRemoved.addListener(function (tabId) {
+    tabinfo.delete(tabId);
+});

chrome/manifest.json

@@ -1,11 +1,11 @@
 {
     "name": "Replace Google CDN",
-    "version": "0.5.0",
+    "version": "0.6.0",
     "manifest_version": 2,
     "icons": {
       "128": "icons/128.png"
     },
-    "description": "Replace Google CDN with USTC CDN.",
+    "description": "将 Google CDN 替换为国内镜像",
     "background": {
         "scripts": ["js/background.js"]
     },