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Callback After a User Joins a Group

Last updated: 2022-05-24 14:38:04

    Feature Description

    The app backend system uses this callback to view group member addition messages in real time. This callback can notify the app backend system that new members are added to the group so that the app can perform necessary data synchronization.


    • To enable this callback, you must configure the callback URL and toggle on the corresponding protocol. For details on the configuration method, see Third-Party Callback Configuration.
    • Callback direction: The IM backend initiates an HTTP POST request to the app backend.
    • After receiving a callback request, the app backend must check whether the SDKAppID contained in the request URL is consistent with its own SDKAppID.
    • For other security-related issues, see Third-Party Callback Overview: Security Considerations.

    Callback Triggering Scenarios

    • An app user actively requests to join a group through the client, and the request is approved.
    • An app user successfully adds other users to a group through the client.
    • An app admin adds users to a group through the RESTful API.

    Callback Triggering Times

    • A user actively requests to join a group and successfully joins the group.
    • A user is invited by another member to join a group and successfully joins the group.
    • An app admin adds the user to a group through the RESTful API.

    API Description

    Request URL example

    In the following example, the callback URL configured for the App is https://www.example.com.


    Request parameters

    Parameter Description
    https The request protocol is HTTPS, and the request method is POST.
    www.example.com The callback URL.
    SdkAppid The SDKAppID assigned by the IM console when an app is created.
    CallbackCommand The value is fixed to Group.CallbackAfterNewMemberJoin.
    contenttype The value is fixed to JSON.
    ClientIP The client IP address, whose format is similar to:
    OptPlatform The client platform. For details on the values, see the OptPlatform parameter in Third-Party Callback Overview: Callback Protocols.

    Request packet example

      "CallbackCommand": "Group.CallbackAfterNewMemberJoin", // Callback command
      "GroupId" : "@TGS#2J4SZEAEL",
      "Type": "Public", // Group type
      "JoinType": "Apply", // Method for joining a group: Apply (apply to join the group) or Invited (invited to join the group)
      "Operator_Account": "leckie", // Operator member
      "NewMemberList": [ // New member list
              "Member_Account": "jared"
              "Member_Account": "tommy"

    Request packet fields

    Field Type Description
    CallbackCommand String The callback command.
    GroupId String The ID of the group into which other users are to be added.
    Type String The type of the group to be created. For details, see Group Types. The group type can be Public.
    JoinType String The method for joining a group: Apply (apply to join the group) or Invited (invited to join the group).
    Operator_Account String The UserID of the request operator.
    NewMemberList Array The list of new members’ UserID s.

    Response packet example

    The app backend system returns the response packet after synchronizing data.

      "ActionStatus": "OK",
      "ErrorInfo": "",
      "ErrorCode": 0 // Ignore the response result

    Response packet fields

    Field Type Attribute Description
    ActionStatus String Required The request processing result. OK: succeeded. FAIL: failed.
    ErrorCode Integer Required The error code. The 0 value indicates that the response can be ignored.
    ErrorInfo String Required Error information.


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