# Receive messages and events

Use in the page <button open-type="contact" /> The Enter Customer Service Session button can be displayed.

When a user sends a message in a customer service session, or an event is pushed by some specific user action, the WeChat server sends a message or event packet to the developer's URL / Cloud development cloud function / [Cloud Hosting Services](https://developers.weixin.qq.com/miniprogram/dev/wxcloudrun /src/Guide/Weixin/push.html)(Please refer toMessage Push）。Upon receipt of the request, the developer can use the Send Customer Service Message Interface for asynchronous replies.

The structure of the push JSON and XML digital packet for each message type is as follows.

# Text message

When a user sends a text message in a customer service session, the following packet is generated:

# XML format

<xml>
   <ToUser ><![CDATA[ToUser]]></ToUser >
   <FromUserName><![CDATA[fromUser]]></FromUserName>
   <CreateTime>1482048670</CreateTime>
   <MsgType ><![CDATA[text]]></MsgType >
   <Content><![CDATA[this is a test]]></Content>
   <MsgId>1234567890123456</MsgId>
</xml>

# JSON format

{
  "ToUserName":  "toUser",
  "FromUserName": "fromUser",
  "CreateTime": 1482048670,
  "MsgType": "text",
  "Content": "this is a test",
  "MsgId": 1234567890123456
}

# Dxplaination of parameters

# Photo Message

When a user sends a picture message in a customer service session, the following packet is generated:

# XML format

<xml>
      <ToUser ><![CDATA[ToUser]]></ToUser >
      <FromUserName><![CDATA[fromUser]]></FromUserName>
      <CreateTime>1482048670</CreateTime>
      <MsgType ><![CDATA[image]]></MsgType >
      <PicUrl><![CDATA[this is a url]]></PicUrl>
      <MediaId><![CDATA[Media_id]]></MediaId>
      <MsgId>1234567890123456</MsgId>
</xml>

# JSON format

{
  "ToUserName":  "toUser",
  "FromUserName": "fromUser",
  "CreateTime": 1482048670,
  "MsgType": "image",
  "PicUrl": "this is a url",
  "MediaId": "media_id",
  "MsgId": 1234567890123456
}

# Dxplaination of parameters

# Mini Program Card Message

When a user sends a Mini Program card message in a customer service session, the following packets are generated:

# XML format

<xml>
  <ToUser ><![CDATA[ToUser]]></ToUser >
  <FromUserName><![CDATA[fromUser]]></FromUserName>
  <CreateTime>1482048670</CreateTime>
  <MsgType ><![CDATA[miniprogrampage ]]></MsgType >
  <MsgId>1234567890123456</MsgId>
  <Title><![CDATA[Title]]></Title>
  <AppId><![CDATA[AppId]]></AppId>
  <PagePath><![CDATA[PagePath]]></PagePath>
  <ThumbUrl><![CDATA[ThumbUrl]]></ThumbUrl>
  <ThumbMediaId><![CDATA[ThumbMediaId]]></ThumbMediaId>
</xml>

# JSON format

{
  "ToUserName":  "toUser",
  "FromUserName": "fromUser",
  "CreateTime": 1482048670,
  "MsgType": "miniprogrampage" 
  "MsgId": 1234567890123456,
  "Title":"title",
  "AppId": "appid", 
  "PagePath":"path",
  "ThumbUrl":"",
  "ThumbMediaId":""
}

# Dxplaination of parameters

# Enter Session Event

When the user enters the customer service session in the Mini Program "Customer Service Session Button," the following data packets will be generated:

# XML format

<xml>
    <ToUser ><![CDATA[ToUser]]></ToUser >
    <FromUserName><![CDATA[fromUser]]></FromUserName>
    <CreateTime>1482048670</CreateTime>
    <MsgType ><![CDATA[event]]></MsgType >
    <Event><![CDATA[user_Enter_tempsession]]></Event>
    <SessionFrom><![CDATA[sessionFrom]]></SessionFrom>
</xml>

# JSON format

{
  "ToUserName":  "toUser",
  "FromUserName": "fromUser",
  "CreateTime": 1482048670,
  "MsgType": "event",
  "Event": "user_Enter_tempsession",
  "SessionFrom": "sessionFrom"
}

# Dxplaination of parameters