diff --git a/dao/db.go b/dao/db.go
index 5bf9c7f..b25d46a 100644
--- a/dao/db.go
+++ b/dao/db.go
@@ -9,28 +9,33 @@ import (
 
 var DB *gorm.DB
 
-func Init() {
+func Init() error {
 	dsn := proto.MYSQL_DSN
 
 	db, err := gorm.Open(mysql.Open(dsn), &gorm.Config{})
 	if err != nil {
 		panic("failed to connect database")
+		return err
 	}
 	err = db.AutoMigrate(&User{})
 	if err != nil {
 		fmt.Println("user table:", err)
+		return err
 	} // 自动迁移，创建表，如果表已经存在，会自动更新表结构，不会删除表,只会创建不存在的表
 	err = db.AutoMigrate(&Video{})
 	if err != nil {
 		fmt.Println("video table:", err)
+		return err
 	} // 自动迁移，创建表，如果表已经存在，会自动更新表结构，不会删除表,只会创建不存在的表
 	err = db.AutoMigrate(&Device{})
 	if err != nil {
 		fmt.Println("device table:", err)
+		return err
 	} // 自动迁移，创建表，如果表已经存在，会自动更新表结构，不会删除表,只会创建不存在的表
 	err = db.AutoMigrate(&Logger{})
 	if err != nil {
 		fmt.Println("logger table:", err)
+		return err
 	} // 自动迁移，创建表，如果表已经存在，会自动更新表结构，不会删除表,只会创建不存在的表
 	err = db.AutoMigrate(&CID{})
 	if err != nil {
@@ -40,7 +45,30 @@ func Init() {
 	if err != nil {
 		fmt.Println("cidrunlog table:", err)
 	} // 自动迁移，创建表，如果表已经存在，会自动更新表结构，不会删除表,只会创建不存在的表
+
+	err = db.AutoMigrate(&Message{})
+	if err != nil {
+		fmt.Println("message table:", err)
+	}
+
+	err = db.AutoMigrate(&Group{})
+	if err != nil {
+		fmt.Println("usergroup table:", err)
+	}
+
+	err = db.AutoMigrate(&GroupUser{})
+	if err != nil {
+		fmt.Println("groupuser table:", err)
+		return err
+	}
+
+	err = db.AutoMigrate(&Friend{})
+	if err != nil {
+		fmt.Println("friend table:", err)
+	}
+
 	DB = db
+	return err
 }
 
 func Close() {
diff --git a/dao/im.go b/dao/im.go
new file mode 100644
index 0000000..1e83c43
--- /dev/null
+++ b/dao/im.go
@@ -0,0 +1,178 @@
+package dao
+
+import (
+	"gorm.io/gorm"
+	"videoplayer/proto"
+)
+
+type Message struct {
+	gorm.Model
+	FromUserID int    `gorm:"column:from_user_id"`
+	ToUserID   int    `gorm:"column:to_user_id"`
+	GroupID    int    `gorm:"column:group_id"`
+	Msg        string `gorm:"column:msg"`
+	Status     int    `gorm:"column:status"` //单聊时才有0,已读，2未读
+	Type       int    `gorm:"column:type"`   //1为单聊，2为群聊，3为系统消息,4为好友请求,5为加入群聊请求
+}
+
+type Group struct {
+	gorm.Model
+	GroupName string `gorm:"column:group_name"`
+	GroupInfo string `gorm:"column:group_info"`
+	GroupType int    `gorm:"column:group_type"`
+	GroupIcon string `gorm:"column:group_icon"`
+}
+
+type GroupUser struct {
+	gorm.Model
+	GroupID  int  `gorm:"column:group_id"`
+	UserID   int  `gorm:"column:user_id"`
+	IsMaster bool `gorm:"column:is_master"`
+}
+
+type Friend struct {
+	gorm.Model
+	UserID   int `gorm:"column:user_id"`
+	FriendID int `gorm:"column:friend_id"`
+}
+
+// 创建单聊消息
+func CreateSimpleMessage(from_user_id, to_user_id int, message string) (error, uint) {
+	msg := Message{FromUserID: from_user_id, ToUserID: to_user_id, Msg: message, Type: proto.MSG_TYPE_SIMPLE, Status: proto.MSG_STATUS_UNREAD}
+	res := DB.Debug().Create(&msg)
+	return res.Error, msg.ID
+}
+
+func CreateGeneralMessage(from_user_id, to_user_id, msg_type, status, group_id int, message string) (error error, id uint) {
+	msg := Message{FromUserID: from_user_id, ToUserID: to_user_id, Msg: message, Type: msg_type, Status: status, GroupID: group_id}
+	res := DB.Debug().Create(&msg)
+	return res.Error, msg.ID
+}
+
+// 每20个消息一组，请求index*20
+func GetMsgUserByIndex(from_user_id, to_user_id, msg_type, index, status int) ([]Message, error) {
+	var msgs []Message
+	var res *gorm.DB
+	if msg_type == 4 {
+		res = DB.Debug().Where("from_user_id = ? and to_user_id = ? and type = ? and status = ? ", from_user_id, to_user_id, msg_type, status).Find(&msgs).Order("created_at DESC").Limit(20 * index)
+	} else if msg_type == 1 {
+		//单聊,只有两个人的消息
+		res = DB.Debug().Where("((from_user_id = ? and to_user_id = ?) or (from_user_id = ? and to_user_id = ?)) and type = ? ", from_user_id, to_user_id, to_user_id, from_user_id, msg_type).Find(&msgs).Order("created_at DESC").Limit(20 * index)
+	} else {
+		res = DB.Debug().Where("from_user_id = ? and to_user_id = ? and type = ? ", from_user_id, to_user_id, msg_type).Find(&msgs).Order("created_at DESC").Limit(20 * index)
+	}
+	return msgs, res.Error
+}
+
+// 获取邀请消息
+func GetFriendGroupReq(user_id int) ([]Message, error) {
+	var msgs []Message
+	res := DB.Debug().Where("to_user_id = ? and type = ?", user_id, proto.MSG_TYPE_FRIEND).Find(&msgs)
+	return msgs, res.Error
+}
+
+// 修改信息
+func UpdateMessage() {
+
+}
+
+// 添加好友
+func AddFriend(user_id, friend_id int) error {
+	friend := Friend{UserID: user_id, FriendID: friend_id}
+	friend2 := Friend{UserID: friend_id, FriendID: user_id}
+
+	//开启事务
+	tx := DB.Begin()
+	if err := tx.Create(&friend); err.Error != nil {
+		tx.Rollback()
+		return err.Error
+	}
+	if err := tx.Create(&friend2); err.Error != nil {
+		tx.Rollback()
+		return err.Error
+	}
+	//提交事务
+	if err := tx.Commit().Error; err != nil {
+		return err
+	}
+	return error(nil)
+}
+
+// 删除好友,删除后双方都不是好友
+func DeleteFriend(user_id, friend_id int) error {
+	//开启事务
+	tx := DB.Begin()
+	if err := tx.Delete(&Friend{}, "user_id = ? and friend_id = ?", user_id, friend_id); err.Error != nil {
+		tx.Rollback()
+		return err.Error
+	}
+	if err := tx.Delete(&Friend{}, "user_id = ? and friend_id = ?", friend_id, user_id); err.Error != nil {
+		tx.Rollback()
+		return err.Error
+	}
+	//提交事务
+	if err := tx.Commit().Error; err != nil {
+		return err
+	}
+	return error(nil)
+}
+
+// 通过id查找消息
+func FindMessageByID(id uint) []Message {
+	var msgs []Message
+	DB.Debug().Where("id = ?", id).Find(&msgs)
+	return msgs
+}
+
+// 更新消息状态
+func UpdateMessageStatus(id uint, status int) error {
+	res := DB.Debug().Model(&Message{}).Where("id = ?", id).Update("status", status)
+	return res.Error
+}
+
+// 创建群聊,需要事务
+func CreateGroup(groupName, groupInfo, groupType, groupIcon string, user_id int) (error, uint) {
+	group := Group{GroupName: groupName, GroupInfo: groupInfo, GroupType: proto.MSG_TYPE_GROUP, GroupIcon: groupIcon}
+	//开启事务
+	tx := DB.Begin()
+	if err := tx.Create(&group); err.Error != nil {
+		tx.Rollback()
+		return err.Error, 0
+	}
+	groupUser := GroupUser{GroupID: int(group.ID), UserID: user_id, IsMaster: true}
+	if err := tx.Create(&groupUser); err.Error != nil {
+		tx.Rollback()
+		return err.Error, 0
+	}
+	//提交事务
+	if err := tx.Commit().Error; err != nil {
+		return err, 0
+	}
+	return nil, group.ID
+}
+
+// 查找用户是否在群聊
+func FindGroupUser(user_id, group_id int) []GroupUser {
+	var groupUsers []GroupUser
+	DB.Debug().Where("user_id = ? and group_id = ?", user_id, group_id).Find(&groupUsers)
+	return groupUsers
+}
+
+// 加入群聊
+func JoinGroup(group_id, user_id int) error {
+	groupUser := GroupUser{GroupID: group_id, UserID: user_id}
+	res := DB.Debug().Create(&groupUser)
+	return res.Error
+}
+
+// 退出群聊
+func QuitGroup(group_id, user_id int) error {
+	res := DB.Debug().Delete(&GroupUser{}, "group_id = ? and user_id = ?", group_id, user_id)
+	return res.Error
+}
+
+func FindFriend(from_user_id, to_user_id int) []Friend {
+	var friends []Friend
+	DB.Debug().Where("user_id = ? and friend_id = ?", from_user_id, to_user_id).Find(&friends)
+	return friends
+}
diff --git a/handler/im.go b/handler/im.go
index 4607094..f4e2a94 100644
--- a/handler/im.go
+++ b/handler/im.go
@@ -13,9 +13,31 @@ import (
 	"sync"
 	"time"
 	"videoplayer/proto"
+	"videoplayer/service"
 	"videoplayer/worker"
 )
 
+type SMessage struct {
+	To_user_id int    `json:"to_user_id" form:"to_user_id"`
+	Type       int    `json:"type" form:"type"`
+	Msg        string `json:"msg" form:"msg"`
+}
+
+type Message struct {
+	ID           int `json:"id"`
+	To_user_id   int `json:"to_user_id"`
+	From_user_id int `json:"from_user_id"`
+	Index        int `json:"index"`
+	Type         int `json:"type"`
+}
+
+type CGroup struct {
+	Group_name string `json:"group_name" form:"group_name"`
+	Group_info string `json:"group_info" form:"group_info"`
+	Group_type string `json:"group_type" form:"group_type"`
+	Group_icon string `json:"group_icon" form:"group_icon"`
+}
+
 var (
 	upgrader = websocket.Upgrader{
 		ReadBufferSize:  1024,
@@ -37,7 +59,11 @@ func SetUpIMGroup(router *gin.Engine) {
 	imGroup := router.Group("/im")
 	imGroup.POST("/get_imKey", GetImKey)
 	imGroup.GET("/ws", SRMessage)
-
+	imGroup.POST("/send_message", SendMessage)
+	imGroup.POST("/get_message", GetMessage)
+	//接受邀请,确认好友关系
+	imGroup.POST("/accept_invite", AcceptInvite)
+	imGroup.POST("/create_group", CreateGroup)
 }
 func generateRandomHexString(length int) (string, error) {
 	bytes := make([]byte, length/2) // 16字节的字符串需要32个十六进制字符，即16个字节
@@ -46,6 +72,72 @@ func generateRandomHexString(length int) (string, error) {
 	}
 	return hex.EncodeToString(bytes), nil
 }
+func GetMessage(c *gin.Context) {
+	var req Message
+	user_id, _ := c.Get("id")
+	id := int(user_id.(float64))
+	if err := c.ShouldBind(&req); err == nil {
+		fmt.Println(req)
+		msgs, err2 := service.GetMsgUserByIndexService(id, req.To_user_id, req.Index, req.Type, req.From_user_id)
+		if err2 == nil {
+			c.JSON(http.StatusOK, gin.H{"code": proto.SuccessCode, "data": msgs, "message": "success"})
+		} else {
+			c.JSON(http.StatusOK, gin.H{"error": err2.Error(), "code": proto.OperationFailed, "message": "failed"})
+		}
+	} else {
+		c.JSON(http.StatusOK, gin.H{"error": err.Error(), "code": proto.ParameterError, "message": "failed"})
+	}
+}
+
+func CreateGroup(c *gin.Context) {
+	var req CGroup
+	id, _ := c.Get("id")
+	user_id := int(id.(float64))
+	if err := c.ShouldBind(&req); err == nil {
+		err2, id := service.CreateGroup(req.Group_name, req.Group_info, req.Group_type, req.Group_icon, user_id)
+		if err2 == nil {
+			c.JSON(http.StatusOK, gin.H{"code": proto.SuccessCode, "data": id, "message": "success"})
+		} else {
+			c.JSON(http.StatusOK, gin.H{"error": err2.Error(), "code": proto.OperationFailed, "message": "failed"})
+		}
+	} else {
+		c.JSON(http.StatusOK, gin.H{"error": err.Error(), "code": proto.ParameterError, "message": "failed"})
+	}
+}
+
+func AcceptInvite(c *gin.Context) {
+	var req Message
+	user_id, _ := c.Get("id")
+	cid := int(user_id.(float64))
+	if err := c.ShouldBind(&req); err == nil {
+		err2 := service.AddFriendService(req.ID, cid, req.To_user_id)
+		if err2 == nil {
+			c.JSON(http.StatusOK, gin.H{"code": proto.SuccessCode, "message": "success"})
+		} else {
+			c.JSON(http.StatusOK, gin.H{"error": err2.Error(), "code": proto.OperationFailed, "message": "failed"})
+		}
+	} else {
+		c.JSON(http.StatusOK, gin.H{"error": err.Error(), "code": proto.ParameterError, "message": "failed"})
+	}
+}
+
+func SendMessage(c *gin.Context) {
+	var req SMessage
+	user_id, _ := c.Get("id")
+	id := int(user_id.(float64))
+	if err := c.ShouldBind(&req); err == nil {
+		var err2 error
+		var mid uint
+		err2, mid = service.CreateGeneralMessageService(id, req.To_user_id, req.Type, req.Msg)
+		if err2 == nil {
+			c.JSON(http.StatusOK, gin.H{"code": proto.SuccessCode, "message": "success", "data": mid})
+		} else {
+			c.JSON(http.StatusOK, gin.H{"error": err2.Error(), "code": proto.MsgSendFailed, "message": "failed"})
+		}
+	} else {
+		c.JSON(http.StatusOK, gin.H{"error": err.Error(), "code": proto.ParameterError, "message": "failed"})
+	}
+}
 
 func GetImKey(c *gin.Context) {
 	id, _ := c.Get("id")
diff --git a/main.go b/main.go
index f0afcfc..6034cf4 100644
--- a/main.go
+++ b/main.go
@@ -18,8 +18,14 @@ func main() {
 
 	r := gin.Default()
 	gin.SetMode(gin.ReleaseMode)
-	dao.Init()
-	worker.InitRedis()
+	err := dao.Init()
+	if err != nil {
+		panic("failed to connect database:" + err.Error())
+	}
+	err = worker.InitRedis()
+	if err != nil {
+		panic("failed to connect redis:" + err.Error())
+	}
 	r.Use(handler.CrosHandler())
 	r.Use(JWTAuthMiddleware())  // 使用 JWT 认证中间件
 	handler.SetUpVideoGroup(r)  // Video
diff --git a/proto/conf.go b/proto/conf.go
index 5130b5f..f3c0f8f 100644
--- a/proto/conf.go
+++ b/proto/conf.go
@@ -11,7 +11,7 @@ const (
 	MYSQL_DSN      = MYSQL_USER + ":" + MYSQL_PASSWORD + "@tcp(" + MYSQL_HOST + ":" + MYSQL_PORT + ")/" + MYSQL_DB + "?charset=utf8mb4&parseTime=True&loc=Local"
 
 	REDIS_ADDR     = "127.0.0.1:6379"
-	REDIS_PASSWORD = "lj502138"
+	REDIS_PASSWORD = ""
 	REIDS_DB       = 2
 
 	TOKEN_SECRET = "mfjurnc_32ndj9dfhj"
@@ -20,6 +20,19 @@ const (
 	CID_BASE_DIR = "/home/lijun/cid/"
 )
 
+const (
+	// 以下是消息类型
+	MSG_TYPE_SIMPLE    = 1 // 单聊
+	MSG_TYPE_GROUP     = 2 // 群聊
+	MSG_TYPE_SYSTEM    = 3 // 系统消息
+	MSG_TYPE_FRIEND    = 4 // 好友请求
+	MSG_TYPE_GROUP_ADD = 5 // 加入群聊请求
+
+	// 以下是消息状态
+	MSG_STATUS_READ   = 1 // 已读
+	MSG_STATUS_UNREAD = 0 // 未读
+)
+
 type User struct {
 	gorm.Model
 	Name   string `gorm:"column:name"`
diff --git a/proto/status.go b/proto/status.go
index 42268d1..a0f71cb 100644
--- a/proto/status.go
+++ b/proto/status.go
@@ -46,4 +46,7 @@ const (
 	NoRedisPermissions  = 51
 	NoRunPermissions    = 52
 	NoDevicePermissions = 53
+
+	//消息错误码
+	MsgSendFailed = 61 // 消息发送失败
 )
diff --git a/service/imService.go b/service/imService.go
new file mode 100644
index 0000000..7c038d3
--- /dev/null
+++ b/service/imService.go
@@ -0,0 +1,102 @@
+package service
+
+import (
+	"errors"
+	"videoplayer/dao"
+)
+
+func CreateGeneralMessageService(from_id, to_id, msg_type int, content string) (error, uint) {
+	// 业务逻辑
+	var err error
+	var id uint
+	switch msg_type {
+	case 1:
+		//判断是否是好友
+		friend := dao.FindFriend(from_id, to_id)
+		if len(friend) == 0 {
+			return errors.New("not a friend"), 0
+		}
+		err, id = dao.CreateSimpleMessage(from_id, to_id, content)
+	case 2:
+		err, id = dao.CreateGeneralMessage(from_id, to_id, msg_type, 0, 0, content)
+	case 3:
+		//user := dao.FindUserByID(to_id)
+		// 系统消息,需要管理员权限
+		err, id = dao.CreateGeneralMessage(from_id, to_id, msg_type, 0, 0, content)
+	case 4:
+		res, _ := dao.GetMsgUserByIndex(from_id, to_id, 4, 1, 0)
+		if len(res) > 0 {
+			// 已经有会话记录
+			return errors.New("already have a conversation"), 0
+		}
+		err, id = dao.CreateGeneralMessage(from_id, to_id, msg_type, 0, 0, content)
+	case 5:
+		res, _ := dao.GetMsgUserByIndex(from_id, to_id, 5, 1, 0)
+		if len(res) > 0 {
+			// 已经有会话记录
+			return errors.New("already have a conversation"), 0
+		}
+		//邀请加入群聊请求
+		err, id = dao.CreateGeneralMessage(from_id, to_id, msg_type, 0, from_id, content)
+	default:
+		// 未知消息类型
+		err = errors.New("unknown message type")
+	}
+	return err, id
+}
+
+func GetMsgUserByIndexService(from_id, to_id, index, msq_type, from_user_id int) ([]dao.Message, error) {
+	// 业务逻辑
+	if index <= 0 || index > 100 {
+		return nil, errors.New("index out of range")
+	}
+	if msq_type == 4 {
+		from_id = from_user_id
+	}
+	msgs, err := dao.GetMsgUserByIndex(from_id, to_id, msq_type, index, 0)
+	return msgs, err
+}
+
+// AddFriendService 通过消息id添加好友,和加入群聊
+// id 消息id
+// from_user_id 发送消息的用户id
+// to_user_id 接收消息的用户id,及接受用户id
+func AddFriendService(id, from_user_id, to_user_id int) error {
+	// 业务逻辑
+	res := dao.FindMessageByID(uint(id))
+	if res[0].FromUserID == to_user_id && res[0].ToUserID == from_user_id {
+		friend := dao.FindFriend(from_user_id, to_user_id)
+		if len(friend) > 0 {
+			return errors.New("already a friend")
+		}
+		dao.UpdateMessageStatus(res[0].ID, 1)
+		return dao.AddFriend(from_user_id, to_user_id)
+	} else if res[0].ToUserID == from_user_id && res[0].GroupID == to_user_id {
+		//加入群聊
+		//查看是否已经加入
+		groupUser := dao.FindGroupUser(from_user_id, to_user_id)
+		if len(groupUser) > 0 {
+			return errors.New("already in the group")
+		}
+		err := dao.JoinGroup(groupUser[0].GroupID, to_user_id)
+		if err != nil {
+			return err
+		}
+		err = dao.UpdateMessageStatus(res[0].ID, 1)
+		return err
+	} else {
+		return errors.New("no such message,cannot add friend")
+	}
+}
+
+// CreateGroup 创建群聊
+// groupName 群聊名称
+// groupInfo 群聊信息
+// groupType 群聊类型
+// groupIcon 群聊图标
+// user_id 创建群的用户id
+func CreateGroup(groupName, groupInfo, groupType, groupIcon string, user_id int) (error, uint) {
+	// 业务逻辑
+	err, id := dao.CreateGroup(groupName, groupInfo, groupType, groupIcon, user_id)
+	return err, id
+}
diff --git a/worker/redis.go b/worker/redis.go
index a05fc21..bc19b5f 100644
--- a/worker/redis.go
+++ b/worker/redis.go
@@ -13,7 +13,7 @@ import (
 )
 
 var redisClient *redis.Client // Redis 客户端, 用于连接 Redis 服务器
-func InitRedis() {
+func InitRedis() error {
 	ctx := context.Background()
 	// 连接redis
 	redisClient = redis.NewClient(&redis.Options{
@@ -27,6 +27,7 @@ func InitRedis() {
 	if err != nil {
 		fmt.Println("Error connecting to Redis: %v", err)
 	}
+	return err
 }
 
 func CloseRedis() {