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Feature Description
This API is used by the app backend to view the recalls of one-to-one messages in real time.
Notes
To enable this callback, you must configure the callback URL and enable the corresponding switch for this callback. For more information on the configuration method, see Callback Configuration.
During this callback, the IM backend initiates an HTTPS POST request to the app backend.
After receiving the callback request, the app backend must check whether the
SDKAppID contained in the request URL is the SDKAppID of the app.For more security considerations, see the Security Considerations section in Third-Party Callback Overview.
Callback Trigger Scenarios
An app user recalls a one-to-one message on the client.
An app admin recalls a one-to-one message by calling the admin_msgwithdraw API.
Callback Trigger Timing
After a one-to-one message is recalled successfully
API Calling Description
Sample request URL
In the following sample, the callback URL configured in the app is
https://www.example.com.
Sample:https://www.example.com?SdkAppid=$SDKAppID&CallbackCommand=$CallbackCommand&contenttype=json&ClientIP=$ClientIP&OptPlatform=$OptPlatform
Request parameters
Parameter | Description |
https | The request protocol is HTTPS and the request method is POST. |
www.example.com | Callback URL |
SdkAppid | SDKAppID assigned by the IM console when the app is created |
CallbackCommand | Always C2C.CallbackAfterMsgWithDraw |
contenttype | Always json |
ClientIP | Client IP, such as 127.0.0.1 |
OptPlatform | Client platform. For valid values, see the description of OptPlatform in the Callback Protocols section of Third-Party Callback Overview. |
Sample request
{"CallbackCommand": "C2C.CallbackAfterMsgWithDraw", // Callback command"From_Account": "jared", // Sender"To_Account": "Jonh", // Recipient"MsgKey": "48374_2837546_1557481126", // Unique identifier of the message"UnreadMsgNum": 7 // Total number of unread one-to-one messages of `To_Account`}
Request fields
Field | Type | Description |
CallbackCommand | String | Callback command |
From_Account | String | UserID of the message sender |
To_Account | String | UserID of the message recipient |
MsgKey | String | Unique identifier of the message |
UnreadMsgNum | Integer | Total number of unread one-to-one messages of To_Account (including all one-to-one conversations) |
Sample response
{"ActionStatus": "OK","ErrorInfo": "","ErrorCode": 0 // `0`: callback succeeds; `1`: an error occurs during callback.}
Response fields
Field | Type | Required | Description |
ActionStatus | String | Yes | Request result. OK: successful; FAIL: failed |
ErrorCode | Integer | Yes | Error code. 0: callback succeeds; 1: an error occurs during callback. |
ErrorInfo | String | Yes | Error information |