diff --git a/index.js b/index.js
index e477700..7d3464f 100644
--- a/index.js
+++ b/index.js
@@ -4,6 +4,11 @@
  * static files (404.html, sw.js, conf.js)
  */
 const ASSET_URL = 'https://hunshcn.github.io/gh-proxy'
+// git使用cnpmjs镜像、分支文件使用jsDelivr镜像的开关，0为关闭，默认开启
+const Config = {
+    jsdelivr: 1,
+    cnpmjs: 1
+}
 
 /** @type {RequestInit} */
 const PREFLIGHT_INIT = {
@@ -62,7 +67,7 @@ async function fetchHandler(e) {
     const exp = /^(?:https?:\/\/)?github\.com\/.+?\/.+?\/(?:releases|archive)\/.*$/
     const exp2 = /^(?:https?:\/\/)?github\.com\/.+?\/.+?\/(?:blob)\/.*$/
     const exp3 = /^(?:https?:\/\/)?github\.com\/.+?\/.+?\/(?:info|git-upload-pack).*$/
-    if (path.search(exp)===0) {
+    if (path.search(exp)===0 || !Config.jsdelivr && path.search(exp2)===0 || !Config.cnpmjs && path.search(exp3)===0) {
         return httpHandler(req, path)
     }else if(path.search(exp2)===0) {
         const newUrl = path.replace('/blob/', '@').replace(/^(?:https?:\/\/)?github\.com/, 'https://cdn.jsdelivr.net/gh')
diff --git a/index2.js b/index2.js
deleted file mode 100644
index 4ac974f..0000000
--- a/index2.js
+++ /dev/null
@@ -1,147 +0,0 @@
-'use strict'
-
-/**
- * static files (404.html, sw.js, conf.js)
- */
-const ASSET_URL = 'https://hunshcn.github.io/gh-proxy'
-
-/** @type {RequestInit} */
-const PREFLIGHT_INIT = {
-    status: 204,
-    headers: new Headers({
-        'access-control-allow-origin': '*',
-        'access-control-allow-methods': 'GET,POST,PUT,PATCH,TRACE,DELETE,HEAD,OPTIONS',
-        'access-control-max-age': '1728000',
-    }),
-}
-
-/**
- * @param {any} body
- * @param {number} status
- * @param {Object<string, string>} headers
- */
-function makeRes(body, status = 200, headers = {}) {
-    headers['access-control-allow-origin'] = '*'
-    return new Response(body, {status, headers})
-}
-
-
-/**
- * @param {string} urlStr
- */
-function newUrl(urlStr) {
-    try {
-        return new URL(urlStr)
-    } catch (err) {
-        return null
-    }
-}
-
-
-addEventListener('fetch', e => {
-    const ret = fetchHandler(e)
-        .catch(err => makeRes('cfworker error:\n' + err.stack, 502))
-    e.respondWith(ret)
-})
-
-
-/**
- * @param {FetchEvent} e
- */
-async function fetchHandler(e) {
-    const req = e.request
-    const urlStr = req.url
-    const urlObj = new URL(urlStr)
-    let path = urlObj.searchParams.get('q')
-    if(path)
-    {
-        return Response.redirect('https://' + urlObj.host + '/' + path, 301)
-    }
-    // cfworker 会把路径中的 `//` 合并成 `/`
-    path = urlObj.href.substr(urlObj.origin.length + 1).replace(/^https?:\/+/, 'https://')
-    const exp = /^(?:https?:\/\/)?github\.com\/.+?\/.+?\/(?:releases|archive|info|git-upload-pack).*$/
-    const exp2 = /^(?:https?:\/\/)?github\.com\/.+?\/.+?\/(?:blob)\/.*$/
-    if (path.search(exp)===0) {
-        return httpHandler(req, path)
-    }else if(path.search(exp2)===0){
-        const newUrl = path.replace('/blob/', '@').replace(/^(?:https?:\/\/)?github\.com/, 'https://cdn.jsdelivr.net/gh')
-        return Response.redirect(newUrl, 302)
-    } else {
-        return fetch(ASSET_URL + path)
-    }
-}
-
-
-/**
- * @param {Request} req
- * @param {string} pathname
- */
-function httpHandler(req, pathname) {
-    const reqHdrRaw = req.headers
-
-    // preflight
-    if (req.method === 'OPTIONS' &&
-        reqHdrRaw.has('access-control-request-headers')
-    ) {
-        return new Response(null, PREFLIGHT_INIT)
-    }
-
-    let rawLen = ''
-
-    const reqHdrNew = new Headers(reqHdrRaw)
-
-    const refer = reqHdrNew.get('referer')
-
-    let urlStr = pathname
-    if (urlStr.startsWith('github')) {
-        urlStr = 'https://' + urlStr
-    }
-    const urlObj = newUrl(urlStr)
-
-    /** @type {RequestInit} */
-    const reqInit = {
-        method: req.method,
-        headers: reqHdrNew,
-        redirect: 'follow',
-        body: req.body
-    }
-    return proxy(urlObj, reqInit, rawLen, 0)
-}
-
-
-/**
- *
- * @param {URL} urlObj
- * @param {RequestInit} reqInit
- */
-async function proxy(urlObj, reqInit, rawLen) {
-    const res = await fetch(urlObj.href, reqInit)
-    const resHdrOld = res.headers
-    const resHdrNew = new Headers(resHdrOld)
-
-    // verify
-    if (rawLen) {
-        const newLen = resHdrOld.get('content-length') || ''
-        const badLen = (rawLen !== newLen)
-
-        if (badLen) {
-            return makeRes(res.body, 400, {
-                '--error': `bad len: ${newLen}, except: ${rawLen}`,
-                'access-control-expose-headers': '--error',
-            })
-        }
-    }
-    const status = res.status
-    resHdrNew.set('access-control-expose-headers', '*')
-    resHdrNew.set('access-control-allow-origin', '*')
-
-    resHdrNew.delete('content-security-policy')
-    resHdrNew.delete('content-security-policy-report-only')
-    resHdrNew.delete('clear-site-data')
-
-    return new Response(res.body, {
-        status,
-        headers: resHdrNew,
-    })
-}
-