tencent cloud

https://www.example.com?SdkAppid=$SDKAppID&CallbackCommand=$CallbackCommand&contenttype=json&ClientIP=$ClientIP&OptPlatform=$OptPlatform

{
    "CallbackCommand": "C2C.CallbackBeforeSendMsg", // Webhook command
    "From_Account": "jared", // Sender
    "To_Account": "John", // Recipient
    "MsgSeq": 48374, // Sequence number of the message
    "MsgRandom": 2837546, // Random number of the message
    "MsgTime": 1557481126, // Timestamp in seconds indicating when the message is sent 
    "MsgKey": "48374_2837546_1557481126", // Unique identifier of the message. It can be used to recall the message via a RESTful API call.
    "OnlineOnlyFlag":1, // The value is `1` if it is an online message and `0` if it's not
    "MsgBody": [ // Message body. For more information, see the `TIMMessage` message object.
        {
            "MsgType": "TIMTextElem", // Text
            "MsgContent":{
                "Text": "red packet"
            }
        }
    ],
    "CloudCustomData": "your cloud custom data"
}

{
    "ActionStatus": "OK",
    "ErrorInfo": "",
    "ErrorCode": 0 // `0` indicates the user is allowed to send messages.
}

{
    "ActionStatus": "OK",
    "ErrorInfo": "",
    "ErrorCode": 1 // `1` indicates that the user is not allowed to send messages.
}

{
    "ActionStatus": "OK",
    "ErrorInfo": "",
    "ErrorCode": 2 // The value `2` indicates the message is silently discarded.
}

{
    "ActionStatus": "OK",
    "ErrorInfo": "",
    "ErrorCode": 0, // This field must be set to `0` so that the modified message can be sent normally.
    "MsgBody": [ // Message modified by the app backend. If the app backend does not modify the message, the message sent by the user is delivered.
        {
            "MsgType": "TIMTextElem", // Text
            "MsgContent":{
                "Text": "red packet"
            }
        },
        {
            "MsgType": "TIMCustomElem", // Custom message
            "MsgContent":{
                "Desc": " CustomElement.MemberLevel ", // Description
                "Data": " LV1" // Data
            }
        }
    ],
    "CloudCustomData": "your new cloud custom data" // Custom message data
}