diff --git a/README.md b/README.md
index 3ff33de..d6b5f59 100644
--- a/README.md
+++ b/README.md
@@ -68,7 +68,7 @@
 | /set_group_leave         | [退出群组](https://cqhttp.cc/docs/4.15/#/API?id=set_group_leave-退出群组) |
 | /set_group_name          | 设置群组名(拓展API)                                         |
 | /get_image               | 获取图片信息(拓展API)                                        |
-| /get_group_msg           | 获取群组消息(拓展API)                                        |
+| /get_msg                 | [获取消息]()                                        | <!-- TODO 来人补个链接-->
 | /can_send_image          | [检查是否可以发送图片](https://cqhttp.cc/docs/4.15/#/API?id=can_send_image-检查是否可以发送图片) |
 | /can_send_record         | [检查是否可以发送语音](https://cqhttp.cc/docs/4.15/#/API?id=can_send_record-检查是否可以发送语音) |
 | /get_status              | [获取插件运行状态](https://cqhttp.cc/docs/4.15/#/API?id=get_status-获取插件运行状态) |
diff --git a/coolq/api.go b/coolq/api.go
index c6b2b55..ee5ba17 100644
--- a/coolq/api.go
+++ b/coolq/api.go
@@ -102,6 +102,59 @@ func (bot *CQBot) CQGetGroupMemberInfo(groupId, userId int64) MSG {
 	return OK(convertGroupMemberInfo(groupId, member))
 }
 
+func (bot *CQBot) CQGetGroupFileSystemInfo(groupId int64) MSG {
+	fs, err := bot.Client.GetGroupFileSystem(groupId)
+	if err != nil {
+		log.Errorf("获取群 %v 文件系统信息失败: %v", groupId, err)
+		return Failed(100)
+	}
+	return OK(fs)
+}
+
+func (bot *CQBot) CQGetGroupRootFiles(groupId int64) MSG {
+	fs, err := bot.Client.GetGroupFileSystem(groupId)
+	if err != nil {
+		log.Errorf("获取群 %v 文件系统信息失败: %v", groupId, err)
+		return Failed(100)
+	}
+	files, folders, err := fs.Root()
+	if err != nil {
+		log.Errorf("获取群 %v 根目录文件失败: %v", groupId, err)
+		return Failed(100)
+	}
+	return OK(MSG{
+		"files":   files,
+		"folders": folders,
+	})
+}
+
+func (bot *CQBot) CQGetGroupFilesByFolderId(groupId int64, folderId string) MSG {
+	fs, err := bot.Client.GetGroupFileSystem(groupId)
+	if err != nil {
+		log.Errorf("获取群 %v 文件系统信息失败: %v", groupId, err)
+		return Failed(100)
+	}
+	files, folders, err := fs.GetFilesByFolder(folderId)
+	if err != nil {
+		log.Errorf("获取群 %v 根目录 %v 子文件失败: %v", groupId, folderId, err)
+		return Failed(100)
+	}
+	return OK(MSG{
+		"files":   files,
+		"folders": folders,
+	})
+}
+
+func (bot *CQBot) CQGetGroupFileUrl(groupId int64, fileId string, busId int32) MSG {
+	url := bot.Client.GetGroupFileUrl(groupId, fileId, busId)
+	if url == "" {
+		return Failed(100)
+	}
+	return OK(MSG{
+		"url": url,
+	})
+}
+
 func (bot *CQBot) CQGetWordSlices(content string) MSG {
 	slices, err := bot.Client.GetWordSegmentation(content)
 	if err != nil {
@@ -384,29 +437,43 @@ func (bot *CQBot) CQProcessFriendRequest(flag string, approve bool) MSG {
 
 // https://cqhttp.cc/docs/4.15/#/API?id=set_group_add_request-%E5%A4%84%E7%90%86%E5%8A%A0%E7%BE%A4%E8%AF%B7%E6%B1%82%EF%BC%8F%E9%82%80%E8%AF%B7
 func (bot *CQBot) CQProcessGroupRequest(flag, subType, reason string, approve bool) MSG {
+	msgs, err := bot.Client.GetGroupSystemMessages()
+	if err != nil {
+		log.Errorf("获取群系统消息失败: %v", err)
+		return Failed(100)
+	}
 	if subType == "add" {
-		req, ok := bot.joinReqCache.Load(flag)
-		if !ok {
-			return Failed(100)
+		for _, req := range msgs.JoinRequests {
+			if strconv.FormatInt(req.RequestId, 10) == flag {
+				if req.Checked {
+					log.Errorf("处理群系统消息失败: 无法操作已处理的消息.")
+					return Failed(100)
+				}
+				if approve {
+					req.Accept()
+				} else {
+					req.Reject(false, reason)
+				}
+				return OK(nil)
+			}
 		}
-		bot.joinReqCache.Delete(flag)
-		if approve {
-			req.(*client.UserJoinGroupRequest).Accept()
-		} else {
-			req.(*client.UserJoinGroupRequest).Reject(false, reason)
+	} else {
+		for _, req := range msgs.InvitedRequests {
+			if strconv.FormatInt(req.RequestId, 10) == flag {
+				if req.Checked {
+					log.Errorf("处理群系统消息失败: 无法操作已处理的消息.")
+					return Failed(100)
+				}
+				if approve {
+					req.Accept()
+				} else {
+					req.Reject(false, reason)
+				}
+				return OK(nil)
+			}
 		}
-		return OK(nil)
-	}
-	req, ok := bot.invitedReqCache.Load(flag)
-	if ok {
-		bot.invitedReqCache.Delete(flag)
-		if approve {
-			req.(*client.GroupInvitedRequest).Accept()
-		} else {
-			req.(*client.GroupInvitedRequest).Reject(false, reason)
-		}
-		return OK(nil)
 	}
+	log.Errorf("处理群系统消息失败: 消息 %v 不存在.", flag)
 	return Failed(100)
 }
 
@@ -666,6 +733,15 @@ func (bot *CQBot) CQGetMessage(messageId int32) MSG {
 	})
 }
 
+func (bot *CQBot) CQGetGroupSystemMessages() MSG {
+	msg, err := bot.Client.GetGroupSystemMessages()
+	if err != nil {
+		log.Warnf("获取群系统消息失败: %v", err)
+		return Failed(100)
+	}
+	return OK(msg)
+}
+
 func (bot *CQBot) CQCanSendImage() MSG {
 	return OK(MSG{"yes": true})
 }
diff --git a/coolq/bot.go b/coolq/bot.go
index 0483d57..06c02ff 100644
--- a/coolq/bot.go
+++ b/coolq/bot.go
@@ -23,13 +23,11 @@ import (
 type CQBot struct {
 	Client *client.QQClient
 
-	events          []func(MSG)
-	db              *leveldb.DB
-	friendReqCache  sync.Map
-	invitedReqCache sync.Map
-	joinReqCache    sync.Map
-	tempMsgCache    sync.Map
-	oneWayMsgCache  sync.Map
+	events         []func(MSG)
+	db             *leveldb.DB
+	friendReqCache sync.Map
+	tempMsgCache   sync.Map
+	oneWayMsgCache sync.Map
 }
 
 type MSG map[string]interface{}
@@ -211,7 +209,12 @@ func (bot *CQBot) SendGroupMessage(groupId int64, m *message.SendingMessage) int
 		}
 		newElem = append(newElem, elem)
 	}
+	if len(newElem) == 0 {
+		log.Warnf("群消息发送失败: 消息为空.")
+		return -1
+	}
 	m.Elements = newElem
+	bot.checkMedia(newElem)
 	ret := bot.Client.SendGroupMessage(groupId, m, ForceFragmented)
 	if ret == nil || ret.Id == -1 {
 		log.Warnf("群消息发送失败: 账号可能被风控.")
@@ -292,7 +295,12 @@ func (bot *CQBot) SendPrivateMessage(target int64, m *message.SendingMessage) in
 		}
 		newElem = append(newElem, elem)
 	}
+	if len(newElem) == 0 {
+		log.Warnf("好友消息发送失败: 消息为空.")
+		return -1
+	}
 	m.Elements = newElem
+	bot.checkMedia(newElem)
 	var id int32 = -1
 	if bot.Client.FindFriend(target) != nil { // 双向好友
 		msg := bot.Client.SendPrivateMessage(target, m)
diff --git a/coolq/cqcode.go b/coolq/cqcode.go
index 2233ad6..f092a5f 100644
--- a/coolq/cqcode.go
+++ b/coolq/cqcode.go
@@ -243,6 +243,10 @@ func ToStringMessage(e []message.IMessageElement, code int64, raw ...bool) (r st
 			} else {
 				r += fmt.Sprintf(`[CQ:image,file=%s,url=%s]`, o.Filename, CQCodeEscapeValue(o.Url))
 			}
+		case *message.GroupImageElement:
+			r += fmt.Sprintf("[CQ:image,file=%s]", hex.EncodeToString(o.Md5)+".image")
+		case *message.FriendImageElement:
+			r += fmt.Sprintf("[CQ:image,file=%s]", hex.EncodeToString(o.Md5)+".image")
 		case *message.ServiceElement:
 			if isOk := strings.Contains(o.Content, "<?xml"); isOk {
 				r += fmt.Sprintf(`[CQ:xml,data=%s,resid=%d]`, CQCodeEscapeValue(o.Content), o.Id)
diff --git a/coolq/event.go b/coolq/event.go
index eda461a..7512d80 100644
--- a/coolq/event.go
+++ b/coolq/event.go
@@ -167,13 +167,24 @@ func (bot *CQBot) tempMessageEvent(c *client.QQClient, m *message.TempMessage) {
 
 func (bot *CQBot) groupMutedEvent(c *client.QQClient, e *client.GroupMuteEvent) {
 	g := c.FindGroup(e.GroupCode)
-	if e.Time > 0 {
-		log.Infof("群 %v 内 %v 被 %v 禁言了 %v秒.",
-			formatGroupName(g), formatMemberName(g.FindMember(e.TargetUin)), formatMemberName(g.FindMember(e.OperatorUin)), e.Time)
+	if e.TargetUin == 0 {
+		if e.Time != 0 {
+			log.Infof("群 %v 被 %v 开启全员禁言.",
+				formatGroupName(g), formatMemberName(g.FindMember(e.OperatorUin)))
+		} else {
+			log.Infof("群 %v 被 %v 解除全员禁言.",
+				formatGroupName(g), formatMemberName(g.FindMember(e.OperatorUin)))
+		}
 	} else {
-		log.Infof("群 %v 内 %v 被 %v 解除禁言.",
-			formatGroupName(g), formatMemberName(g.FindMember(e.TargetUin)), formatMemberName(g.FindMember(e.OperatorUin)))
+		if e.Time > 0 {
+			log.Infof("群 %v 内 %v 被 %v 禁言了 %v 秒.",
+				formatGroupName(g), formatMemberName(g.FindMember(e.TargetUin)), formatMemberName(g.FindMember(e.OperatorUin)), e.Time)
+		} else {
+			log.Infof("群 %v 内 %v 被 %v 解除禁言.",
+				formatGroupName(g), formatMemberName(g.FindMember(e.TargetUin)), formatMemberName(g.FindMember(e.OperatorUin)))
+		}
 	}
+
 	bot.dispatchEventMessage(MSG{
 		"post_type":   "notice",
 		"duration":    e.Time,
@@ -184,10 +195,10 @@ func (bot *CQBot) groupMutedEvent(c *client.QQClient, e *client.GroupMuteEvent)
 		"user_id":     e.TargetUin,
 		"time":        time.Now().Unix(),
 		"sub_type": func() string {
-			if e.Time > 0 {
-				return "ban"
+			if e.Time == 0 {
+				return "lift_ban"
 			}
-			return "lift_ban"
+			return "ban"
 		}(),
 	})
 }
@@ -271,12 +282,16 @@ func (bot *CQBot) groupNotifyEvent(c *client.QQClient, e client.IGroupNotifyEven
 func (bot *CQBot) friendRecallEvent(c *client.QQClient, e *client.FriendMessageRecalledEvent) {
 	f := c.FindFriend(e.FriendUin)
 	gid := ToGlobalId(e.FriendUin, e.MessageId)
-	log.Infof("好友 %v(%v) 撤回了消息: %v", f.Nickname, f.Uin, gid)
+	if f != nil {
+		log.Infof("好友 %v(%v) 撤回了消息: %v", f.Nickname, f.Uin, gid)
+	} else {
+		log.Infof("好友 %v 撤回了消息: %v", e.FriendUin, gid)
+	}
 	bot.dispatchEventMessage(MSG{
 		"post_type":   "notice",
 		"notice_type": "friend_recall",
 		"self_id":     c.Uin,
-		"user_id":     f.Uin,
+		"user_id":     e.FriendUin,
 		"time":        e.Time,
 		"message_id":  gid,
 	})
@@ -392,7 +407,6 @@ func (bot *CQBot) friendAddedEvent(c *client.QQClient, e *client.NewFriendEvent)
 func (bot *CQBot) groupInvitedEvent(c *client.QQClient, e *client.GroupInvitedRequest) {
 	log.Infof("收到来自群 %v(%v) 内用户 %v(%v) 的加群邀请.", e.GroupName, e.GroupCode, e.InvitorNick, e.InvitorUin)
 	flag := strconv.FormatInt(e.RequestId, 10)
-	bot.invitedReqCache.Store(flag, e)
 	bot.dispatchEventMessage(MSG{
 		"post_type":    "request",
 		"request_type": "group",
@@ -409,7 +423,6 @@ func (bot *CQBot) groupInvitedEvent(c *client.QQClient, e *client.GroupInvitedRe
 func (bot *CQBot) groupJoinReqEvent(c *client.QQClient, e *client.UserJoinGroupRequest) {
 	log.Infof("群 %v(%v) 收到来自用户 %v(%v) 的加群请求.", e.GroupName, e.GroupCode, e.RequesterNick, e.RequesterUin)
 	flag := strconv.FormatInt(e.RequestId, 10)
-	bot.joinReqCache.Store(flag, e)
 	bot.dispatchEventMessage(MSG{
 		"post_type":    "request",
 		"request_type": "group",
@@ -476,6 +489,26 @@ func (bot *CQBot) checkMedia(e []message.IMessageElement) {
 				}), 0644)
 			}
 			i.Filename = filename
+		case *message.GroupImageElement:
+			filename := hex.EncodeToString(i.Md5) + ".image"
+			if !global.PathExists(path.Join(global.IMAGE_PATH, filename)) {
+				_ = ioutil.WriteFile(path.Join(global.IMAGE_PATH, filename), binary.NewWriterF(func(w *binary.Writer) {
+					w.Write(i.Md5)
+					w.WriteUInt32(uint32(i.Size))
+					w.WriteString(filename)
+					w.WriteString(i.Url)
+				}), 0644)
+			}
+		case *message.FriendImageElement:
+			filename := hex.EncodeToString(i.Md5) + ".image"
+			if !global.PathExists(path.Join(global.IMAGE_PATH, filename)) {
+				_ = ioutil.WriteFile(path.Join(global.IMAGE_PATH, filename), binary.NewWriterF(func(w *binary.Writer) {
+					w.Write(i.Md5)
+					w.WriteUInt32(uint32(0)) // 发送时会调用url, 大概没事
+					w.WriteString(filename)
+					w.WriteString(i.Url)
+				}), 0644)
+			}
 		case *message.VoiceElement:
 			i.Name = strings.ReplaceAll(i.Name, "{", "")
 			i.Name = strings.ReplaceAll(i.Name, "}", "")
diff --git a/docs/cqhttp.md b/docs/cqhttp.md
index 9584ed1..09b2c0d 100644
--- a/docs/cqhttp.md
+++ b/docs/cqhttp.md
@@ -380,9 +380,9 @@ Type: `tts`
 | `filename` | string | 图片文件原名   |
 | `url`      | string | 图片下载地址   |
 
-### 获取群消息
+### 获取消息
 
-终结点: `/get_group_msg` 
+终结点: `/get_msg` 
 
 参数
 
@@ -398,7 +398,7 @@ Type: `tts`
 | `real_id`    | int32   | 消息真实id |
 | `sender`     | object  | 发送者     |
 | `time`       | int32   | 发送时间   |
-| `content`    | message | 消息内容   |
+| `message`    | message | 消息内容   |
 
 ### 获取合并转发内容
 
@@ -500,6 +500,147 @@ Type: `tts`
  | `coordinates` |      vector2       | 坐标 |
  
 
+### 获取群系统消息
+
+终结点: `/get_group_system_msg`
+
+**响应数据**
+
+ | 字段       | 类型              | 说明     |
+ | ---------- | ----------------- | -------- |
+ | `invited_requests` |      InvitedRequest[]       | 邀请消息列表 |
+ | `join_requests` |      JoinRequest[]        | 进群消息列表 |
+ 
+ > 注意: 如果列表不存在任何消息, 将返回 `null`
+ 
+ **InvitedRequest**
+ 
+  | 字段       | 类型              | 说明     |
+  | ---------- | ----------------- | -------- |
+  | `request_id` |      int64       | 请求ID |
+  | `invitor_uin` |      int64        | 邀请者 |
+  | `invitor_nick` |      string       | 邀请者昵称 |
+  | `group_id` | int64        | 群号 |
+  | `group_name` | string | 群名 |
+  | `checked` | bool | 是否已被处理|
+  | `actor` | int64 | 处理者, 未处理为0 |
+  
+  **JoinRequest**
+  
+  | 字段       | 类型              | 说明     |
+  | ---------- | ----------------- | -------- |
+  | `request_id` |      int64       | 请求ID |
+  | `requester_uin` |      int64        | 请求者ID |
+  | `requester_nick` |      string       | 请求者昵称 |
+  | `message` |      string       | 验证消息 |
+  | `group_id` | int64        | 群号 |
+  | `group_name` | string | 群名 |
+  | `checked` | bool | 是否已被处理|
+  | `actor` | int64 | 处理者, 未处理为0 |
+  
+### 获取群文件系统信息
+
+终结点: `/get_group_file_system_info`
+
+**参数** 
+ 
+ | 字段         | 类型   | 说明   |
+ | ------------ | ------ | ------ |
+ | `group_id` | int64 | 群号 |
+
+**响应数据**
+
+ | 字段       | 类型              | 说明     |
+ | ---------- | ----------------- | -------- |
+ | `file_count` |      int32       | 文件总数 |
+ | `limit_count` |      int32        | 文件上限 |
+ | `used_space` |      int64        | 已使用空间 |
+ | `total_space` |      int64        | 空间上限 |
+
+### 获取群根目录文件列表
+
+> `File` 和 `Folder` 对象信息请参考最下方
+
+终结点: `/get_group_root_files`
+
+**参数** 
+ 
+ | 字段         | 类型   | 说明   |
+ | ------------ | ------ | ------ |
+ | `group_id` | int64 | 群号 |
+ 
+**响应数据**
+
+ | 字段       | 类型              | 说明     |
+ | ---------- | ----------------- | -------- |
+ | `files` |      File[]       | 文件列表 |
+ | `folders` |      Folder[]        | 文件夹列表 |
+ 
+### 获取群子目录文件列表
+
+> `File` 和 `Folder` 对象信息请参考最下方
+
+终结点: `/get_group_files_by_folder`
+
+**参数** 
+ 
+ | 字段         | 类型   | 说明   |
+ | ------------ | ------ | ------ |
+ | `group_id` | int64 | 群号 |
+ | `folder_id` | string | 文件夹ID 参考 `Folder` 对象 |
+ 
+**响应数据**
+
+ | 字段       | 类型              | 说明     |
+ | ---------- | ----------------- | -------- |
+ | `files` |      File[]       | 文件列表 |
+ | `folders` |      Folder[]        | 文件夹列表 |
+ 
+### 获取群文件资源链接
+
+> `File` 和 `Folder` 对象信息请参考最下方
+
+终结点: `/get_group_file_url`
+
+**参数** 
+ 
+ | 字段         | 类型   | 说明   |
+ | ------------ | ------ | ------ |
+ | `group_id` | int64 | 群号 |
+ | `file_id` | string | 文件ID 参考 `File` 对象 |
+ | `busid` | int32 | 文件类型 参考 `File` 对象 |
+ 
+**响应数据**
+
+ | 字段       | 类型              | 说明     |
+ | ---------- | ----------------- | -------- |
+ | `url` |      string       | 文件下载链接 |
+ 
+ **File**
+
+  | 字段       | 类型              | 说明     |
+  | ---------- | ----------------- | -------- |
+  | `file_id` |      string       | 文件ID |
+  | `file_name` |      string        | 文件名 |
+  | `busid` |      int32       | 文件类型 |
+  | `file_size` | int64        | 文件大小 |
+  | `upload_time` | int64 | 上传时间 |
+  | `dead_time` | int64 | 过期时间,永久文件恒为0 |
+  | `modify_time` | int64 | 最后修改时间 |
+  | `download_times` | int32 | 下载次数 |
+  | `uploader` | int64 | 上传者ID |
+  | `uploader_name` | string | 上传者名字 |
+  
+ **Folder**
+
+  | 字段       | 类型              | 说明     |
+  | ---------- | ----------------- | -------- |
+  | `folder_id` |      string       | 文件夹ID |
+  | `folder_name` |      string        | 文件名 |
+  | `create_time` | int64 | 创建时间 |
+  | `creator` | int64 | 创建者 |
+  | `creator_name` | string | 创建者名字 |
+  | `total_file_count` | int32 | 子文件数量 |
 
 ## 事件
 
diff --git a/global/config.go b/global/config.go
index e380e99..15a3759 100644
--- a/global/config.go
+++ b/global/config.go
@@ -131,7 +131,7 @@ func DefaultConfig() *JsonConfig {
 		},
 		WebUi: &GoCqWebUi{
 			Enabled:   true,
-			Host:      "0.0.0.0",
+			Host:      "127.0.0.1",
 			WebInput:  false,
 			WebUiPort: 9999,
 		},
diff --git a/global/net.go b/global/net.go
index 7691e89..d30d796 100644
--- a/global/net.go
+++ b/global/net.go
@@ -8,15 +8,20 @@ import (
 	"io/ioutil"
 	"net/http"
 	"strings"
+	"time"
 )
 
+var client = &http.Client{
+	Timeout: time.Second * 15,
+}
+
 func GetBytes(url string) ([]byte, error) {
 	req, err := http.NewRequest("GET", url, nil)
 	if err != nil {
 		return nil, err
 	}
 	req.Header["User-Agent"] = []string{"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.116 Safari/537.36 Edg/83.0.478.61"}
-	resp, err := http.DefaultClient.Do(req)
+	resp, err := client.Do(req)
 	if err != nil {
 		return nil, err
 	}
diff --git a/global/param.go b/global/param.go
index 25e138f..5f01bea 100644
--- a/global/param.go
+++ b/global/param.go
@@ -2,6 +2,9 @@ package global
 
 import (
 	"github.com/tidwall/gjson"
+	"math"
+	"regexp"
+	"strconv"
 	"strings"
 )
 
@@ -48,3 +51,22 @@ func EnsureBool(p interface{}, defaultVal bool) bool {
 	}
 	return defaultVal
 }
+
+// VersionNameCompare 检查版本名是否需要更新, 仅适用于 go-cqhttp 的版本命名规则
+// 例: v0.9.29-fix2 == v0.9.29-fix2 -> false
+// v0.9.29-fix1 < v0.9.29-fix2 -> true
+// v0.9.29-fix2 > v0.9.29-fix1 -> false
+// v0.9.29-fix2 < v0.9.30 -> true
+func VersionNameCompare(current, remote string) bool {
+	sp := regexp.MustCompile(`[0-9]\d*`)
+	cur := sp.FindAllStringSubmatch(current, -1)
+	re := sp.FindAllStringSubmatch(remote, -1)
+	for i := 0; i < int(math.Min(float64(len(cur)), float64(len(re)))); i++ {
+		curSub, _ := strconv.Atoi(cur[i][0])
+		reSub, _ := strconv.Atoi(re[i][0])
+		if curSub < reSub {
+			return true
+		}
+	}
+	return len(cur) < len(re)
+}
diff --git a/go.mod b/go.mod
index 3118405..ba3dc3b 100644
--- a/go.mod
+++ b/go.mod
@@ -3,10 +3,10 @@ module github.com/Mrs4s/go-cqhttp
 go 1.14
 
 require (
-	github.com/Mrs4s/MiraiGo v0.0.0-20201017083749-517ddcd50b8d
+	github.com/Mrs4s/MiraiGo v0.0.0-20201105120358-ca72d542ca72
 	github.com/gin-gonic/gin v1.6.3
 	github.com/gorilla/websocket v1.4.2
-	github.com/guonaihong/gout v0.1.2
+	github.com/guonaihong/gout v0.1.3
 	github.com/lestrrat-go/file-rotatelogs v2.4.0+incompatible
 	github.com/lestrrat-go/strftime v1.0.3 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
diff --git a/go.sum b/go.sum
index 7acd5a6..163260f 100644
--- a/go.sum
+++ b/go.sum
@@ -1,13 +1,7 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/Mrs4s/MiraiGo v0.0.0-20201013050256-7b392cacdb79 h1:t9PK37mnl5tbilG+FMUY1hZujoDjFr8iO8upwYHww5c=
-github.com/Mrs4s/MiraiGo v0.0.0-20201013050256-7b392cacdb79/go.mod h1:cwYPI2uq6nxNbx0nA6YuAKF1V5szSs6FPlGVLQvRUlo=
-github.com/Mrs4s/MiraiGo v0.0.0-20201016033322-0922b058ff56 h1:vcXOLG+W/c56EWOwA8btrHMEGBMwFgLUZli0Jh1axzg=
-github.com/Mrs4s/MiraiGo v0.0.0-20201016033322-0922b058ff56/go.mod h1:cwYPI2uq6nxNbx0nA6YuAKF1V5szSs6FPlGVLQvRUlo=
-github.com/Mrs4s/MiraiGo v0.0.0-20201017083749-517ddcd50b8d h1:f59SuqT0RVy6T9nAg6zTNfnzkvdgLdGqkNKu/AfiPU4=
-github.com/Mrs4s/MiraiGo v0.0.0-20201017083749-517ddcd50b8d/go.mod h1:cwYPI2uq6nxNbx0nA6YuAKF1V5szSs6FPlGVLQvRUlo=
-github.com/bwmarrin/snowflake v0.3.0 h1:xm67bEhkKh6ij1790JB83OujPR5CzNe8QuQqAgISZN0=
-github.com/bwmarrin/snowflake v0.3.0/go.mod h1:NdZxfVWX+oR6y2K0o6qAYv6gIOP9rjG0/E9WsDpxqwE=
+github.com/Mrs4s/MiraiGo v0.0.0-20201105120358-ca72d542ca72 h1:aiKVmrgZHXARnO6AYODwFf1JvTZr6OCl2pohepkkYKc=
+github.com/Mrs4s/MiraiGo v0.0.0-20201105120358-ca72d542ca72/go.mod h1:pAsWtMIwqkBXr5DkUpTIHoWQJNduVnX9WSBPmPvkuCs=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -40,8 +34,8 @@ github.com/golang/protobuf v1.4.0-rc.2/go.mod h1:LlEzMj4AhA7rCAGe4KMBDvJI+AwstrU
 github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:WU3c8KckQ9AFe+yFwt9sWVRKCVIyN9cPHBJSNnbL67w=
 github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvqG2KuDX0=
 github.com/golang/protobuf v1.4.1/go.mod h1:U8fpvMrcmy5pZrNK1lt4xCsGvpyWQ/VVv6QDs8UjoX8=
-github.com/golang/protobuf v1.4.2 h1:+Z5KGCizgyZCbGh1KZqA0fcLLkwbsjIzS4aV2v7wJX0=
-github.com/golang/protobuf v1.4.2/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
+github.com/golang/protobuf v1.4.3 h1:JjCZWpVbqXDqFVmTfYWEVTMIYrL/NPdPSCHPJ0T/raM=
+github.com/golang/protobuf v1.4.3/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
 github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db h1:woRePGFeVFfLKN/pOkfl+p/TAqKOfFu+7KPlMVpok/w=
 github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
@@ -53,8 +47,8 @@ github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/
 github.com/google/uuid v1.1.1/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/gorilla/websocket v1.4.2 h1:+/TMaTYc4QFitKJxsQ7Yye35DkWvkdLcvGKqM+x0Ufc=
 github.com/gorilla/websocket v1.4.2/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
-github.com/guonaihong/gout v0.1.2 h1:TR2XCRopGgJdj231IayEoeavgbznFXzzzcZVdT/hG10=
-github.com/guonaihong/gout v0.1.2/go.mod h1:vXvv5Kxr70eM5wrp4F0+t9lnLWmq+YPW2GByll2f/EA=
+github.com/guonaihong/gout v0.1.3 h1:BIiV6nnsA+R6dIB1P33uhCM8+TVAG3zHrXGZad7hDc8=
+github.com/guonaihong/gout v0.1.3/go.mod h1:vXvv5Kxr70eM5wrp4F0+t9lnLWmq+YPW2GByll2f/EA=
 github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
 github.com/json-iterator/go v1.1.7/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
 github.com/json-iterator/go v1.1.9/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
@@ -108,13 +102,6 @@ github.com/ugorji/go/codec v1.1.7 h1:2SvQaVZ1ouYrrKKwoSk2pzd4A9evlKJb9oTL+OaLUSs
 github.com/ugorji/go/codec v1.1.7/go.mod h1:Ax+UKWsSmolVDwsd+7N3ZtXu+yMGCf907BLYF3GoBXY=
 github.com/wdvxdr1123/go-silk v0.0.0-20201007123416-b982fd3d91d6 h1:lX18MCdNzT2zIi7K02x4C5cPkDXpL+wCb1YTAMXjLWQ=
 github.com/wdvxdr1123/go-silk v0.0.0-20201007123416-b982fd3d91d6/go.mod h1:5q9LFlBr+yX/J8Jd/9wHdXwkkjFkNyQIS7kX2Lgx/Zs=
-github.com/xujiajun/gorouter v1.2.0/go.mod h1:yJrIta+bTNpBM/2UT8hLOaEAFckO+m/qmR3luMIQygM=
-github.com/xujiajun/mmap-go v1.0.1 h1:7Se7ss1fLPPRW+ePgqGpCkfGIZzJV6JPq9Wq9iv/WHc=
-github.com/xujiajun/mmap-go v1.0.1/go.mod h1:CNN6Sw4SL69Sui00p0zEzcZKbt+5HtEnYUsc6BKKRMg=
-github.com/xujiajun/nutsdb v0.5.0 h1:j/jM3Zw7Chg8WK7bAcKR0Xr7Mal47U1oJAMgySfDn9E=
-github.com/xujiajun/nutsdb v0.5.0/go.mod h1:owdwN0tW084RxEodABLbO7h4Z2s9WiAjZGZFhRh0/1Q=
-github.com/xujiajun/utils v0.0.0-20190123093513-8bf096c4f53b h1:jKG9OiL4T4xQN3IUrhUpc1tG+HfDXppkgVcrAiiaI/0=
-github.com/xujiajun/utils v0.0.0-20190123093513-8bf096c4f53b/go.mod h1:AZd87GYJlUzl82Yab2kTjx1EyXSQCAfZDhpTo1SQC4k=
 github.com/yinghau76/go-ascii-art v0.0.0-20190517192627-e7f465a30189 h1:4UJw9if55Fu3HOwbfcaQlJ27p3oeJU2JZqoeT3ITJQk=
 github.com/yinghau76/go-ascii-art v0.0.0-20190517192627-e7f465a30189/go.mod h1:rIrm5geMiBhPQkdfUm8gDFi/WiHneOp1i9KjmJqc+9I=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
@@ -135,7 +122,6 @@ golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20181221143128-b4a75ba826a6/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190813064441-fde4db37ae7a/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
diff --git a/main.go b/main.go
index 46ce32d..6da4252 100644
--- a/main.go
+++ b/main.go
@@ -7,6 +7,8 @@ import (
 	"encoding/json"
 	"fmt"
 	"github.com/Mrs4s/go-cqhttp/server"
+	"github.com/guonaihong/gout"
+	"github.com/tidwall/gjson"
 	"io"
 	"io/ioutil"
 	"os"
@@ -245,7 +247,7 @@ func main() {
 		conf.WebUi.WebUiPort = 9999
 	}
 	if conf.WebUi.Host == "" {
-		conf.WebUi.Host = "0.0.0.0"
+		conf.WebUi.Host = "127.0.0.1"
 	}
 	confErr := conf.Save("config.json")
 	if confErr != nil {
@@ -253,6 +255,7 @@ func main() {
 	}
 	b := server.WebServer.Run(fmt.Sprintf("%s:%d", conf.WebUi.Host, conf.WebUi.WebUiPort), cli)
 	c := server.Console
+	go checkUpdate()
 	signal.Notify(c, os.Interrupt, os.Kill)
 	<-c
 	b.Release()
@@ -282,3 +285,27 @@ func DecryptPwd(ePwd string, key []byte) string {
 	}
 	return string(tea.Decrypt(encrypted))
 }
+
+func checkUpdate() {
+	log.Infof("正在检查更新.")
+	if coolq.Version == "unknown" {
+		log.Warnf("检查更新失败: 使用的 Actions 测试版或自编译版本.")
+		return
+	}
+	var res string
+	if err := gout.GET("https://api.github.com/repos/Mrs4s/go-cqhttp/releases").BindBody(&res).Do(); err != nil {
+		log.Warnf("检查更新失败: %v", err)
+		return
+	}
+	detail := gjson.Parse(res)
+	if len(detail.Array()) < 1 {
+		return
+	}
+	info := detail.Array()[0]
+	if global.VersionNameCompare(coolq.Version, info.Get("tag_name").Str) {
+		log.Infof("当前有更新的 go-cqhttp 可供更新, 请前往 https://github.com/Mrs4s/go-cqhttp/releases 下载.")
+		log.Infof("当前版本: %v 最新版本: %v", coolq.Version, info.Get("tag_name").Str)
+		return
+	}
+	log.Infof("检查更新完成. 当前已运行最新版本.")
+}
diff --git a/server/apiAdmin.go b/server/apiAdmin.go
index 44544f9..637b088 100644
--- a/server/apiAdmin.go
+++ b/server/apiAdmin.go
@@ -183,7 +183,11 @@ func (s *webServer) Dologin() {
 				os.Exit(0)
 				return
 			case client.OtherLoginError, client.UnknownLoginError:
-				log.Warnf("登录失败: %v", rsp.ErrorMessage)
+				msg := rsp.ErrorMessage
+				if strings.Contains(msg, "版本") {
+					msg = "密码错误或账号被冻结"
+				}
+				log.Warnf("登录失败: %v", msg)
 				log.Infof("按 Enter 继续....")
 				readLine()
 				os.Exit(0)
@@ -225,8 +229,7 @@ func (s *webServer) Dologin() {
 					log.Warn("Bot已登录")
 					return
 				}
-				if conf.ReLogin.MaxReloginTimes == 0 {
-				} else if times > conf.ReLogin.MaxReloginTimes {
+				if times > conf.ReLogin.MaxReloginTimes && conf.ReLogin.MaxReloginTimes != 0 {
 					break
 				}
 				log.Warnf("Bot已离线 (%v)，将在 %v 秒后尝试重连. 重连次数：%v",
diff --git a/server/http.go b/server/http.go
index c4348ae..3ad7faf 100644
--- a/server/http.go
+++ b/server/http.go
@@ -5,6 +5,7 @@ import (
 	"crypto/hmac"
 	"crypto/sha1"
 	"encoding/hex"
+	"github.com/guonaihong/gout/dataflow"
 	"net/http"
 	"os"
 	"strconv"
@@ -132,11 +133,18 @@ func (c *httpClient) onBotPushEvent(m coolq.MSG) {
 		return h
 	}()).SetTimeout(time.Second * time.Duration(c.timeout)).F().Retry().Attempt(5).
 		WaitTime(time.Millisecond * 500).MaxWaitTime(time.Second * 5).
-		Do()
+		Func(func(con *dataflow.Context) error {
+			if con.Error != nil {
+				log.Warnf("上报Event到 HTTP 服务器 %v 时出现错误: %v 将重试.", c.addr, con.Error)
+				return con.Error
+			}
+			return nil
+		}).Do()
 	if err != nil {
 		log.Warnf("上报Event数据 %v 到 %v 失败: %v", m.ToJson(), c.addr, err)
 		return
 	}
+	log.Debugf("上报Event数据 %v 到 %v", m.ToJson(), c.addr)
 	if gjson.Valid(res) {
 		c.bot.CQHandleQuickOperation(gjson.Parse(m.ToJson()), gjson.Parse(res))
 	}
@@ -183,6 +191,29 @@ func (s *httpServer) GetGroupMemberInfo(c *gin.Context) {
 	c.JSON(200, s.bot.CQGetGroupMemberInfo(gid, uid))
 }
 
+func (s *httpServer) GetGroupFileSystemInfo(c *gin.Context) {
+	gid, _ := strconv.ParseInt(getParam(c, "group_id"), 10, 64)
+	c.JSON(200, s.bot.CQGetGroupFileSystemInfo(gid))
+}
+
+func (s *httpServer) GetGroupRootFiles(c *gin.Context) {
+	gid, _ := strconv.ParseInt(getParam(c, "group_id"), 10, 64)
+	c.JSON(200, s.bot.CQGetGroupRootFiles(gid))
+}
+
+func (s *httpServer) GetGroupFilesByFolderId(c *gin.Context) {
+	gid, _ := strconv.ParseInt(getParam(c, "group_id"), 10, 64)
+	folderId := getParam(c, "folder_id")
+	c.JSON(200, s.bot.CQGetGroupFilesByFolderId(gid, folderId))
+}
+
+func (s *httpServer) GetGroupFileUrl(c *gin.Context) {
+	gid, _ := strconv.ParseInt(getParam(c, "group_id"), 10, 64)
+	fid := getParam(c, "file_id")
+	busid, _ := strconv.ParseInt(getParam(c, "busid"), 10, 32)
+	c.JSON(200, s.bot.CQGetGroupFileUrl(gid, fid, int32(busid)))
+}
+
 func (s *httpServer) SendMessage(c *gin.Context) {
 	if getParam(c, "message_type") == "private" {
 		s.SendPrivateMessage(c)
@@ -317,6 +348,10 @@ func (s *httpServer) GetForwardMessage(c *gin.Context) {
 	c.JSON(200, s.bot.CQGetForwardMessage(resId))
 }
 
+func (s *httpServer) GetGroupSystemMessage(c *gin.Context) {
+	c.JSON(200, s.bot.CQGetGroupSystemMessages())
+}
+
 func (s *httpServer) DeleteMessage(c *gin.Context) {
 	mid, _ := strconv.ParseInt(getParam(c, "message_id"), 10, 32)
 	c.JSON(200, s.bot.CQDeleteMessage(int32(mid)))
@@ -447,6 +482,18 @@ var httpApi = map[string]func(s *httpServer, c *gin.Context){
 	"get_group_member_info": func(s *httpServer, c *gin.Context) {
 		s.GetGroupMemberInfo(c)
 	},
+	"get_group_file_system_info": func(s *httpServer, c *gin.Context) {
+		s.GetGroupFileSystemInfo(c)
+	},
+	"get_group_root_files": func(s *httpServer, c *gin.Context) {
+		s.GetGroupRootFiles(c)
+	},
+	"get_group_files_by_folder": func(s *httpServer, c *gin.Context) {
+		s.GetGroupFilesByFolderId(c)
+	},
+	"get_group_file_url": func(s *httpServer, c *gin.Context) {
+		s.GetGroupFileUrl(c)
+	},
 	"send_msg": func(s *httpServer, c *gin.Context) {
 		s.SendMessage(c)
 	},
@@ -504,6 +551,9 @@ var httpApi = map[string]func(s *httpServer, c *gin.Context){
 	"get_msg": func(s *httpServer, c *gin.Context) {
 		s.GetMessage(c)
 	},
+	"get_group_system_msg": func(s *httpServer, c *gin.Context) {
+		s.GetGroupSystemMessage(c)
+	},
 	"get_group_honor_info": func(s *httpServer, c *gin.Context) {
 		s.GetGroupHonorInfo(c)
 	},
diff --git a/server/websocket.go b/server/websocket.go
index df3a923..668ea00 100644
--- a/server/websocket.go
+++ b/server/websocket.go
@@ -495,6 +495,21 @@ var wsApi = map[string]func(*coolq.CQBot, gjson.Result) coolq.MSG{
 	"get_version_info": func(bot *coolq.CQBot, p gjson.Result) coolq.MSG {
 		return bot.CQGetVersionInfo()
 	},
+	"get_group_system_msg": func(bot *coolq.CQBot, p gjson.Result) coolq.MSG {
+		return bot.CQGetGroupSystemMessages()
+	},
+	"get_group_file_system_info": func(bot *coolq.CQBot, p gjson.Result) coolq.MSG {
+		return bot.CQGetGroupFileSystemInfo(p.Get("group_id").Int())
+	},
+	"get_group_root_files": func(bot *coolq.CQBot, p gjson.Result) coolq.MSG {
+		return bot.CQGetGroupRootFiles(p.Get("group_id").Int())
+	},
+	"get_group_files_by_folder": func(bot *coolq.CQBot, p gjson.Result) coolq.MSG {
+		return bot.CQGetGroupFilesByFolderId(p.Get("group_id").Int(), p.Get("folder_id").Str)
+	},
+	"get_group_file_url": func(bot *coolq.CQBot, p gjson.Result) coolq.MSG {
+		return bot.CQGetGroupFileUrl(p.Get("group_id").Int(), p.Get("file_id").Str, int32(p.Get("busid").Int()))
+	},
 	"_get_vip_info": func(bot *coolq.CQBot, p gjson.Result) coolq.MSG {
 		return bot.CQGetVipInfo(p.Get("user_id").Int())
 	},