Query the message list of group chats

Overview

You can call this operation to paginate and fetch the message list of a specific group chat.

Operation prototype

Request method: POST
Request URL: https://zim-api.zego.im/?Action=QueryGroupMsg
Protocol: HTTPS
QPS limit: 20 calls per second.

Request parameters

The following table describes only the operation-specific request parameters and some common request parameters. For the complete list of common request parameters, see the Public request parameters section of the Accessing Server APIs topic.

Parameter	Type	Required	Description
GroupId	String	Yes	The group ID.
Limit	Number	No	The number of messages to retrieve at a time, with a value range of (0, 100], defaulting to 10. When the value ≤ 0, it is corrected to 10. When the value > 100, it is corrected to 100.
Next	Number	No	Pagination flag for pulling messages. Fill in 0 for the first time, and then fill in the Next value returned from the previous call. When the returned Next is 0, it means that the message list has been completely retrieved. For example, if there are 250 messages in the current one-on-one chat session and you call this interface to query: First call this interface, fill in 100 for Limit, and fill in 0 for Next to query the 1st to 100th messages; the Next value in the returned result is num1. Second call this interface, fill in 100 for Limit, and fill in num1 for Next to query the 101st to 200th messages; the Next value in the returned result is num2. Third call this interface, fill in 100 for Limit, and fill in num2 for Next to query the 201st to 250th messages; the query is complete, and the Next in the returned result is 0.
WithEmptyMsg	Number	No	Whether the returned result includes retracted messages and messages that have been deleted on the server. 0: Default value, not included. 1: Included.

Sample request

Request URL：

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https://zim-api.zego.im/?Action=QueryGroupMsg
&<Common request parameters>

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Request message body:

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{
"GroupId": "group1",
"Limit": 10,
"Next": 0,
"WithEmptyMsg": 0
}

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Response parameters

Code	Number	The return code.
Message	String	The description of the request result.
RequestId	String	The request ID.
Next	Number	Pagination flag. Not 0: indicates that there is more conversation information to be returned, and this field needs to be set to the Next parameter in the request to fetch more conversation information. 0: indicates that the complete conversation list has been returned.
List	Number	Message list. Return the results in descending order by MsgTime.
└Sender	String	The ID of the message sender.
└MsgType	Number	Message type: 1: Text. 11: Image. 12: Document. 13: Audio. 14: Video. 200: Custom.
└SubMsgType	Number	Specific custom type. The value is filled in by the user when sending a custom message, and the value range is [0, 200]. This parameter is only meaningful when MsgType is 200 (custom type).
└MsgBody	String	Message content. When the message is sent by the client: When msg_type is 1 (text type) or 200 (custom type), msg_body is the message content passed in when sending the message, and developers can directly read the message content. When msg_type is 11, 12, 13, 14, which means the message is a media type, msg_body is a JSON string. Please use URLDecode to decode this JSON string and parse it according to the structure of the multimedia message to retrieve the data of various fields in the message. Please refer to the media message structure. When the message is sent by the server, regardless of the message type, the content passed in when sending the message is directly returned.
└MsgId	Number	Message ID, which can be used to determine the uniqueness of the message.
└MsgSeq	Number	The message Seq.
└Payload	String	Message extension field.
└MsgTime	Number	Timestamp when the server receives the message, in Unix time format with milliseconds (ms) as the unit.
└IsEmpty	Number	Whether it is an empty message. 0: Not empty. 1: Message has been deleted or expired. 2: Message has been recalled.

Explanation of parameters in the parsed result of the msg_body JSON string

Parameter	Type	Description
md5	String	The MD5 value of the file.
file_name	String	File name.
file_size	String	File size in bytes (B).
download_url	String	Download address.
media_duration	String	The duration of the audio or video, in seconds (s).

Sample response

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{
    "Code": 0
    "Message": "success",
    "RequestId": "343649807833778782",
    "Next": 1000,
    "List": [
        {
            "Sender": "user1",
            "MsgType": 1,
            "MsgBody": "This is a message.",
            "MsgId": 971503777289036700,
            "MsgSeq": 1,
            "Payload": "Payload",
            "MsgTime": 1705895412000,
            "IsEempy": 0
        }
    ]
}

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Return codes

The following table describes only the return codes related to the business logic of the operation. For the complete list of return codes, see Return codes.

Return Code	Description	Solution
660000002	Invalid parameter.	Check the input parameter.
660300005	The QPS limit specified in `AppID` is exceeded.	Try again later.
660500002	`FromUserId` is not registered.	Check if `FromUserId` is correct.
660600001	The entered GroupId does not exist.	Please confirm if the entered GroupId is correct.
660600009	Failed to retrieve group-related information.	Please confirm if the GroupId is correct. If it is correct, contact ZEGOCLOUD technical support.