diff --git a/lib/update.js b/lib/update.js
index 7ac5292..9685864 100644
--- a/lib/update.js
+++ b/lib/update.js
@@ -2,13 +2,25 @@ const { send } = require('./net/http')
 const { strToJson, download, try_for_each } = require('./utils')
 const { version, checkVersion, log } = require('./utils')
 
+const
+    platform = new Map([
+        ['win32', 'win'],
+        ['linux', 'linux'],
+        ['darwin', 'macos']
+    ]).get(process.platform),
+    arch = new Map([
+        ['x64', 'x64'],
+        ['arm', 'armv7'],
+        ['arm64', 'arm64']
+    ]).get(process.arch);
+
 /**
  * 获取下载链接
  * @param {string} owner
  * @param {string} repo
- * @returns {Promise<{ download_url: string[], text: string }>}
+ * @returns {Promise<{ tag_name:string, assets:Object, text:string }>}
  */
-function getLatestReleaseDownloadUrl(owner, repo) {
+function getLatestRelease(owner, repo) {
     return new Promise((resolve, reject) => {
         send({
             url: `https://api.github.com/repos/${owner}/${repo}/releases/latest`,
@@ -19,37 +31,9 @@ function getLatestReleaseDownloadUrl(owner, repo) {
                 retry: false
             },
             success: ({ body }) => {
-                const { tag_name, assets, body: text } = strToJson(body)
-                if (tag_name) {
-                    if (checkVersion(version) < checkVersion(tag_name)) {
-                        const platform = new Map([
-                            ['win32', 'win'],
-                            ['linux', 'linux'],
-                            ['darwin', 'macos']
-                        ]).get(process.platform)
-                        const arch = new Map([
-                            ['x64', 'x64'],
-                            ['arm', 'armv7'],
-                            ['arm64', 'arm64']
-                        ]).get(process.arch)
-                        if (platform && arch) {
-                            try {
-                                const download_url = assets
-                                    .filter(({ name }) => name.includes(platform) && name.includes(arch))
-                                    .map(({ browser_download_url }) => browser_download_url)
-                                if (!download_url.length) {
-                                    reject(`未找到能在此平台(${process.platform})-(${process.arch})上运行的版本`)
-                                }
-                                resolve({ download_url, text })
-                            } catch (err) {
-                                reject(err)
-                            }
-                        } else {
-                            reject(`未找到能在此平台(${process.platform})-(${process.arch})上运行的版本`)
-                        }
-                    } else {
-                        reject('当前已是最新版本')
-                    }
+                const release = strToJson(body);
+                if (release.tag_name) {
+                    resolve(release)
                 } else {
                     reject(body)
                 }
@@ -61,21 +45,48 @@ function getLatestReleaseDownloadUrl(owner, repo) {
     });
 }
 
+/**
+ * @param {string} releases
+ * @return {boolean}
+*/
+function checkPlatform(releases) {
+    return releases.includes(platform)
+        && releases.includes(arch)
+}
+
 /**
  * 半自动更新
  */
 async function update() {
     try {
-        const { download_url, text } = await getLatestReleaseDownloadUrl('shanmiteko', 'LotteryAutoScript')
-        await try_for_each(download_url.entries(), async ([i, url]) => {
-            let proxy_url = new URL(url)
-            proxy_url.host = 'download.fastgit.org'
-            await download(proxy_url.href, `latest_version${i}.zip`)
-            return false
-        })
-
-        log.info('自动下载', '成功下载到当前目录')
-        log.info('更新说明', '\n' + text + '\n')
+        const { tag_name, assets, body: text } = await getLatestRelease('shanmiteko', 'LotteryAutoScript')
+        if (checkVersion(version) < checkVersion(tag_name)) {
+            const download_url = assets
+                .filter(({ name }) => checkPlatform(name))
+                .map(({ browser_download_url }) => browser_download_url)
+            if (download_url.length) {
+                const proxy_host = ['download.fastgit.org']
+                await try_for_each(download_url.entries(), async ([i, url]) => {
+                    let proxy_url = new URL(url)
+                    proxy_url.host = proxy_host[0]
+                    log.warn('自动下载', `切换代理${proxy_host[0]}`)
+                    await download(proxy_url.href, `latest_version${i}.zip`)
+                        .catch(async err => {
+                            log.error('自动下载', err)
+                            proxy_url.host = 'github.com'
+                            log.warn('自动下载', `使用原始链接github.com`)
+                            await download(proxy_url.href, `latest_version${i}.zip`)
+                        })
+                    return false
+                })
+                log.info('自动下载', '成功下载到当前目录')
+                log.info('更新说明', '\n' + text + '\n')
+            } else {
+                throw `未找到能在此平台(${process.platform})-(${process.arch})上运行的版本,建议以源码运行`
+            }
+        } else {
+            throw '当前已是最新版本'
+        }
     } catch (error) {
         log.error('更新脚本', error)
     }
diff --git a/lib/utils.js b/lib/utils.js
index c38dd90..8bc6f34 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -248,12 +248,13 @@ const utils = {
                     redirect: true,
                     retry: false
                 },
-                success: ({ resStream }) => {
+                success: ({ headers, resStream }) => {
+                    const total_len = Number(headers["content-length"]);
                     let recv_length = 0;
                     const wtbs = fs.createWriteStream(file_name);
                     resStream.on('data', chuck => {
                         recv_length += chuck.length
-                        utils.log.proPrint(`已收到:${recv_length} Bytes`)
+                        utils.log.proPrint(total_len ? `已下载${(recv_length * 100 / total_len + '').slice(0, 5)}%` : `已收到:${recv_length} Bytes`)
                     })
                     resStream.pipe(wtbs)
                     wtbs.on('finish', () => {
@@ -261,7 +262,7 @@ const utils = {
                         resolve()
                     }).on('error', error => {
                         wtbs.destroy()
-                        resolve(error)
+                        reject(error)
                     })
                 },
                 failure: error => {
diff --git a/main.js b/main.js
index 8937f92..afe1949 100644
--- a/main.js
+++ b/main.js
@@ -88,7 +88,7 @@ async function main() {
             }
         } else {
             log.error('Cookie已失效', '切换账号时不要点击退出账号而应直接删除Cookie退出')
-            return ''
+            return
         }
     } else {
         return '请查看README文件, 在env.js指定位置填入cookie'