diff --git a/caller.go b/caller.go
index 0a08f07..ac39870 100644
--- a/caller.go
+++ b/caller.go
@@ -2,6 +2,7 @@ package openwechat
 
 import (
 	"errors"
+	"net/http"
 	"os"
 )
 
@@ -188,10 +189,8 @@ func (c *Caller) WebWxSync(request *BaseRequest, response *WebInitResponse, info
 
 // 发送消息接口
 func (c *Caller) WebWxSendMsg(msg *SendMessage, info *LoginInfo, request *BaseRequest) (*SentMessage, error) {
-	resp := NewReturnResponse(c.Client.WebWxSendMsg(msg, info, request))
-	sendSuccessMsg := &SentMessage{SendMessage: msg}
-	err := parseMessageResponseError(resp, sendSuccessMsg)
-	return sendSuccessMsg, err
+	resp, err := c.Client.WebWxSendMsg(msg, info, request)
+	return getSuccessSentMessage(msg, resp, err)
 }
 
 // 修改用户备注接口
@@ -200,9 +199,9 @@ func (c *Caller) WebWxOplog(request *BaseRequest, remarkName, toUserName string)
 	return parseBaseResponseError(resp)
 }
 
-func (c *Caller) UploadMedia(file *os.File, request *BaseRequest, info *LoginInfo, fromUserName, toUserName, mediaType string) (*UploadResponse, error) {
+func (c *Caller) UploadMedia(file *os.File, request *BaseRequest, info *LoginInfo, fromUserName, toUserName string) (*UploadResponse, error) {
 	// 首先尝试上传图片
-	resp := NewReturnResponse(c.Client.WebWxUploadMediaByChunk(file, request, info, fromUserName, toUserName, mediaType))
+	resp := NewReturnResponse(c.Client.WebWxUploadMediaByChunk(file, request, info, fromUserName, toUserName))
 	// 无错误上传成功之后获取请求结果，判断结果是否正常
 	if resp.Err() != nil {
 		return nil, resp.Err()
@@ -226,39 +225,37 @@ func (c *Caller) UploadMedia(file *os.File, request *BaseRequest, info *LoginInf
 // 发送图片消息接口
 func (c *Caller) WebWxSendImageMsg(file *os.File, request *BaseRequest, info *LoginInfo, fromUserName, toUserName string) (*SentMessage, error) {
 	// 首先尝试上传图片
-	resp, err := c.UploadMedia(file, request, info, fromUserName, toUserName, "pic")
+	resp, err := c.UploadMedia(file, request, info, fromUserName, toUserName)
 	if err != nil {
 		return nil, err
 	}
 	// 构造新的图片类型的信息
 	msg := NewMediaSendMessage(ImageMessage, fromUserName, toUserName, resp.MediaId)
 	// 发送图片信息
-	return c.WebWxSendAppMsg(msg, request, info)
+	resp1, err := c.Client.WebWxSendMsgImg(msg, request, info)
+	return getSuccessSentMessage(msg, resp1, err)
 }
 
 func (c *Caller) WebWxSendFile(file *os.File, req *BaseRequest, info *LoginInfo, fromUserName, toUserName string) (*SentMessage, error) {
-	resp, err := c.UploadMedia(file, req, info, fromUserName, toUserName, "doc")
+	resp, err := c.UploadMedia(file, req, info, fromUserName, toUserName)
 	if err != nil {
 		return nil, err
 	}
-	// 构造新的图片类型的信息
-	msg := NewMediaSendMessage(ImageMessage, fromUserName, toUserName, resp.MediaId)
+	// 构造新的文件类型的信息
 	stat, _ := file.Stat()
 	appMsg := NewFileAppMessage(stat, resp.MediaId)
 	content, err := appMsg.XmlByte()
 	if err != nil {
 		return nil, err
 	}
-	msg.Content = string(content)
-	return c.WebWxSendAppMsg(msg, req, info)
+	msg := NewSendMessage(AppMessage, string(content), fromUserName, toUserName, "")
+	return c.WebWxSendAppMsg(msg, req)
 }
 
 // 发送媒体消息
-func (c *Caller) WebWxSendAppMsg(msg *SendMessage, req *BaseRequest, info *LoginInfo) (*SentMessage, error) {
-	resp := NewReturnResponse(c.Client.WebWxSendMsgImg(msg, req, info))
-	sendSuccessMsg := &SentMessage{SendMessage: msg}
-	err := parseMessageResponseError(resp, sendSuccessMsg)
-	return sendSuccessMsg, err
+func (c *Caller) WebWxSendAppMsg(msg *SendMessage, req *BaseRequest) (*SentMessage, error) {
+	resp, err := c.Client.WebWxSendAppMsg(msg, req)
+	return getSuccessSentMessage(msg, resp, err)
 }
 
 // 用户退出
@@ -333,3 +330,10 @@ func parseMessageResponseError(resp *ReturnResponse, msg *SentMessage) error {
 	msg.MsgId = messageResp.MsgID
 	return nil
 }
+
+func getSuccessSentMessage(msg *SendMessage, resp *http.Response, err error) (*SentMessage, error) {
+	returnResp := NewReturnResponse(resp, err)
+	sendSuccessMsg := &SentMessage{SendMessage: msg}
+	err = parseMessageResponseError(returnResp, sendSuccessMsg)
+	return sendSuccessMsg, err
+}
diff --git a/client.go b/client.go
index 2eef103..23d975a 100644
--- a/client.go
+++ b/client.go
@@ -230,6 +230,8 @@ func (c *Client) sendMessage(request *BaseRequest, url string, msg *SendMessage)
 	body, _ := ToBuffer(content)
 	req, _ := http.NewRequest(http.MethodPost, url, body)
 	req.Header.Add("Content-Type", jsonContentType)
+	fmt.Println(6666)
+	fmt.Println(body.String())
 	return c.Do(req)
 }
 
@@ -251,7 +253,7 @@ func (c *Client) WebWxGetHeadImg(headImageUrl string) (*http.Response, error) {
 	return c.Do(req)
 }
 
-func (c *Client) WebWxUploadMediaByChunk(file *os.File, request *BaseRequest, info *LoginInfo, forUserName, toUserName, mediaType string) (*http.Response, error) {
+func (c *Client) WebWxUploadMediaByChunk(file *os.File, request *BaseRequest, info *LoginInfo, forUserName, toUserName string) (*http.Response, error) {
 	// 获取文件上传的类型
 	contentType, err := GetFileContentType(file)
 	if err != nil {
@@ -276,6 +278,9 @@ func (c *Client) WebWxUploadMediaByChunk(file *os.File, request *BaseRequest, in
 		return nil, err
 	}
 
+	// 获取文件的类型
+	mediaType := getMessageType(sate.Name())
+
 	path, _ := url.Parse(c.webWxUpLoadMediaUrl)
 	params := url.Values{}
 	params.Add("f", "json")
diff --git a/global.go b/global.go
index 1fc90bd..ac7e7a7 100644
--- a/global.go
+++ b/global.go
@@ -115,3 +115,12 @@ const (
 )
 
 const TimeFormat = "Mon Jan 02 2006 15:04:05 GMT+0800 (中国标准时间)"
+
+var imageType = map[string]bool{
+	"bmp":  true,
+	"png":  true,
+	"jpeg": true,
+	"jpg":  true,
+}
+
+var videoType = "mp4"
diff --git a/message.go b/message.go
index 105ddf8..37d5c80 100644
--- a/message.go
+++ b/message.go
@@ -336,7 +336,7 @@ type SendMessage struct {
 	ToUserName   string
 	LocalID      string
 	ClientMsgId  string
-	MediaId      string
+	MediaId      string `json:"MediaId,omitempty"`
 }
 
 // SendMessage的构造方法
@@ -472,18 +472,17 @@ func (s *SentMessage) Revoke() error {
 	return s.Self.RevokeMessage(s)
 }
 
-type FileAppMessage struct {
-	AppMsg    xml.Name `xml:"appmsg"`
-	Type      int      `xml:"type"`
-	AppId     string   `xml:"appid,attr"` // wxeb7ec651dd0aefa9
-	SdkVer    string   `xml:"sdkver,attr"`
-	Title     string   `xml:"title"`
-	Des       string   `xml:"des"`
-	Action    string   `xml:"action"`
-	Content   string   `xml:"content"`
-	Url       string   `xml:"url"`
-	LowUrl    string   `xml:"lowurl"`
-	ExtInfo   string   `xml:"extinfo"`
+type appmsg struct {
+	Type      int    `xml:"type"`
+	AppId     string `xml:"appid,attr"` // wxeb7ec651dd0aefa9
+	SdkVer    string `xml:"sdkver,attr"`
+	Title     string `xml:"title"`
+	Des       string `xml:"des"`
+	Action    string `xml:"action"`
+	Content   string `xml:"content"`
+	Url       string `xml:"url"`
+	LowUrl    string `xml:"lowurl"`
+	ExtInfo   string `xml:"extinfo"`
 	AppAttach struct {
 		TotalLen int64  `xml:"totallen"`
 		AttachId string `xml:"attachid"`
@@ -491,14 +490,15 @@ type FileAppMessage struct {
 	} `xml:"appattach"`
 }
 
-func (f FileAppMessage) XmlByte() ([]byte, error) {
+func (f appmsg) XmlByte() ([]byte, error) {
 	return xml.Marshal(f)
 }
 
-func NewFileAppMessage(stat os.FileInfo, attachId string) *FileAppMessage {
-	m := &FileAppMessage{AppId: "wxeb7ec651dd0aefa9", Title: stat.Name()}
+func NewFileAppMessage(stat os.FileInfo, attachId string) *appmsg {
+	m := &appmsg{AppId: "wxeb7ec651dd0aefa9", Title: stat.Name()}
 	m.AppAttach.AttachId = attachId
 	m.AppAttach.TotalLen = stat.Size()
+	m.Type = 6
 	m.AppAttach.FileExt = getFileExt(stat.Name())
 	return m
 }
diff --git a/parser.go b/parser.go
index 1fb625c..556097a 100644
--- a/parser.go
+++ b/parser.go
@@ -12,11 +12,12 @@ import (
 )
 
 func ToBuffer(v interface{}) (*bytes.Buffer, error) {
-	buf, err := json.Marshal(v)
-	if err != nil {
-		return nil, err
-	}
-	return bytes.NewBuffer(buf), nil
+	var buffer bytes.Buffer
+	encoder := json.NewEncoder(&buffer)
+	// 这里要设置进制html转义
+	encoder.SetEscapeHTML(false)
+	err := encoder.Encode(v)
+	return &buffer, err
 }
 
 // 获取随机设备id
@@ -67,8 +68,25 @@ func GetFileContentType(file multipart.File) (string, error) {
 
 func getFileExt(name string) string {
 	results := strings.Split(name, ".")
-	if len(results) == 0 {
+	if len(results) == 1 {
 		return "undefined"
 	}
 	return results[len(results)-1]
 }
+
+const (
+	pic   = "pic"
+	video = "video"
+	doc   = "doc"
+)
+
+// 微信匹配文件类型策略
+func getMessageType(filename string) string {
+	ext := getFileExt(filename)
+	if imageType[ext] {
+		return pic
+	} else if ext == videoType {
+		return video
+	}
+	return doc
+}