diff --git a/apps/chat.js b/apps/chat.js
index 9218175b..9a064180 100644
--- a/apps/chat.js
+++ b/apps/chat.js
@@ -1674,8 +1674,8 @@ export class chatgpt extends plugin {
                     seq = e.source.message_id
                   }
                   let msgs = e.isGroup ? await e.group.getChatHistory(seq, 1) : await e.friend.getChatHistory(seq, 1)
-                  let sourceMsg = msgs[0]
-                  let fileMsgElem = sourceMsg.message.find(msg => msg.type === 'file')
+                  let sourceMsg = msgs[msgs.length - 1]
+                  let fileMsgElem = sourceMsg.file || sourceMsg.message.find(msg => msg.type === 'file')
                   if (fileMsgElem) {
                     toSummaryFileContent = await extractContentFromFile(fileMsgElem, e)
                   }
diff --git a/utils/chat.js b/utils/chat.js
index f37d5d9f..097cee4e 100644
--- a/utils/chat.js
+++ b/utils/chat.js
@@ -1,4 +1,3 @@
-import common from '../../../lib/common/common.js'
 
 export async function getChatHistoryGroup (e, num) {
   // if (e.adapter === 'shamrock') {
@@ -46,9 +45,15 @@ export async function getChatHistoryGroup (e, num) {
   return []
 }
 
-function pickMemberAsync (e, userId) {
+async function pickMemberAsync (e, userId) {
+  let key = `CHATGPT:GroupMemberInfo:${e.group_id}:${userId}`
+  let cache = await redis.get(key)
+  if (cache) {
+    return JSON.parse(cache)
+  }
   return new Promise((resolve, reject) => {
     e.group.pickMember(userId, true, (sender) => {
+      redis.set(key, JSON.stringify(sender), { EX: 86400 })
       resolve(sender)
     })
   })
diff --git a/utils/common.js b/utils/common.js
index 3c05aaf0..ab27aa57 100644
--- a/utils/common.js
+++ b/utils/common.js
@@ -14,6 +14,7 @@ import { translate } from './translate.js'
 import uploadRecord from './uploadRecord.js'
 import Version from './version.js'
 import fetch, { FormData, fileFromSync } from 'node-fetch'
+import https from "https";
 let pdfjsLib
 try {
   pdfjsLib = (await import('pdfjs-dist')).default
@@ -1034,10 +1035,15 @@ export function getUserSpeaker (userSetting) {
  * @param url 要下载的文件链接
  * @param destPath 目标路径，如received/abc.pdf. 目前如果文件名重复会覆盖。
  * @param absolute 是否是绝对路径，默认为false，此时拼接在data/chatgpt下
+ * @param ignoreCertificateError 忽略证书错误
  * @returns {Promise<string>} 最终下载文件的存储位置
  */
-export async function downloadFile (url, destPath, absolute = false) {
-  let response = await fetch(url)
+export async function downloadFile (url, destPath, absolute = false, ignoreCertificateError = true) {
+  let response = await fetch(url, {
+    agent: new https.Agent({
+      rejectUnauthorized: !ignoreCertificateError
+    })
+  })
   if (!response.ok) {
     throw new Error(`download file http error: status: ${response.status}`)
   }