Pulling Historical Group Messages

Background
Tencent Chat group messages are sorted by seq, and seq is allocated according to the order in which group messages are received by the server. The seq is greater for group messages sent earlier and smaller for group messages sent later.
To pull all the messages of a group, you do not need to enter the seq for the initial pull. Instead, the server automatically returns the latest messages. For subsequent pulls, enter the previously returned smallest seq minus 1.
If the value of IsPlaceMsg in the returned message is 1, it indicates that the message with this seq has expired, failed to be stored, or been deleted.
Feature Overview
This API allows the app administrator to pull the historical messages of a group.
API Calling Description
Applicable group types
Group Type ID
Support for This RESTful API
Private
Yes. Same as work groups (Work) in the new version.
Public
Yes
ChatRoom
Yes. Same as meeting groups (Meeting) in the new version.
AVChatRoom
No
Community
Yes
Above are the Chat built-in groups. For more information, please see Group System.
Note
Audio-video groups (AVChatRoom) do not support this API because the historical messages of this type of group cannot be stored.
Sample request URL
https://xxxxxx/v4/group_open_http_svc/group_msg_get_simple?sdkappid=88888888&identifier=admin&usersig=xxx&random=99999999&contenttype=json
Request parameters
The following table describes the modified parameters when this API is called. For other parameters, see RESTful API Overview.
Parameter
Description
xxxxxx
Domain name corresponding to the country/region where your SDKAppID is located.
China: console.tim.qq.com
Singapore: adminapisgp.im.qcloud.com
Seoul: adminapikr.im.qcloud.com
Frankfurt: adminapiger.im.qcloud.com
Silicon Valley: adminapiusa.im.qcloud.com
Jakarta: adminapiidn.im.qcloud.com
v4/group_open_http_svc/group_msg_get_simple
The request API
sdkappid
SDKAppID assigned by the Chat console when an app is created
identifier
App admin account. For more information, see the App Admin section in Login Authentication.
usersig
Signature generated by the app admin account. For details, see Generating UserSig.
random
A random 32-bit unsigned integer ranging from 0 to 4294967295.
contenttype
Request format. The value is fixed to json.
Maximum call frequency
200 calls per second
Sample request
Basic format
Pulls the historical messages of a group. The most recent ReqMsgNumber group messages will be returned.
{
  "GroupId": "@TGS#15ERQPAER",    // The ID of the group of which messages are to be pulled
  "ReqMsgNumber": 2      // The number of messages to be pulled
}
Pulling by seq
Pulls the historical messages of a group based on the specified seq.
The seq of the returned messages is less than or equal to the ReqMsgNumber of ReqMsgSeq.
{
  "GroupId": "@TGS#15ERQPAER",
  "ReqMsgSeq": 7803321,       // The maximum seq of the requested messages. The messages with a seq less than or equal to `ReqMsgSeq` will be returned.
  "ReqMsgNumber": 2
}
Request fields
Field
Type
Required
Description
GroupId
String
Yes
The ID of the group of which messages are to be pulled
ReqMsgNumber
Integer
Yes
The number of historical messages to be pulled. At present, a maximum of 20 historical messages can be returned per request. Therefore, please set the value of this field to 20 or less.
ReqMsgSeq
Integer
No
The maximum seq of the messages to be pulled
WithRecalledMsg
Integer
Optional
Whether to pull recalled messages. 1: pull recalled messages. Recalled messages are not pulled by default.
TopicId
String
No
ID of the topic for which messages are pulled. This field applies only to topic-enabled communities.
Sample response
{
    "ActionStatus": "OK",
    "ErrorInfo": "",
    "ErrorCode": 0,
    "GroupId": "@TGS#15ERQPAER",
    "IsFinished": 1,
    "RspMsgList": [
        {
            "From_Account": "144115197276518801",
            "IsPlaceMsg": 0,
            "MsgBody": [
                {
                    "MsgContent": {
                        "Data": "\b\u0001\u0010\u0006\u001A\u0006 MaoTong",
                        "Desc": "MIF",
                        "Ext": ""
                    },
                    "MsgType": "TIMCustomElem"
                },
                {
                    "MsgContent": {
                        "Data": "",
                        "Index": 15
                    },
                    "MsgType": "TIMFaceElem"
                }
            ],
            "MsgPriority": 1,
            "MsgRandom": 51083293,
            "MsgSeq": 7803321,
            "MsgTimeStamp": 1458721802
        },
        {
            "From_Account": "144115198339527735",
            "IsPlaceMsg": 0,
            "MsgBody": [
                {
                    "MsgContent": {
                        "Data": "\b\u0001\u0010\u0006\u001A\u000F Watermelon Girl",
                        "Desc": "MIF",
                        "Ext": ""
                    },
                    "MsgType": "TIMCustomElem"
                },
                {
                    "MsgContent": {
                        "Text": "Report"
                    },
                    "MsgType": "TIMTextElem"
                }
            ],
            "MsgPriority": 1,
            "MsgRandom": 235168582,
            "MsgSeq": 7803320,
            "MsgTimeStamp": 1458721797
        }
    ]
}
Response fields
Field
Type
Description
ActionStatus
String
Request result. OK: successful; FAIL: failed
ErrorInfo
String
Error information
ErrorCode
Integer
Error code. 0: Successful; other values: Failed
groupID
String
The group ID in the request
IsFinished
Integer
Whether all the requested messages are returned.
1: All the requested messages are returned.
0: Not all requested messages are returned because the messages are too long or the number of messages is greater than 20.
2: The requested messages are too long or the number of messages is greater than 20 and all the messages have expired.
MsgList
Array
A list of returned messages
From_Account
String
The UserID of the message sender
IsPlaceMsg
Integer
Whether a message is empty. If the message has been deleted or expired, MsgBody is empty and the value of this field is 1. If the message has been recalled, the value of this field is 2.
MsgPriority
Integer
Message priority, which is used for message deduplication. A value is entered when the client sends a message. If no value is entered, the server automatically generates one. 1: high priority; 2: normal priority, 3: low priority; 4: lowest priority
MsgRandom
Integer
Message random value, which is used for message deduplication. A value is entered when the client sends a message. If no value is entered, the server automatically generates one.
MsgSeq
Integer
The unique seq of the message. The smaller the value, the earlier the message was sent.
MsgTimeStamp
Integer
The timestamp when the message was sent, which follows the server time system
MsgBody
Array
Message body. For more information, see Message Formats.
IsSystemMsg
Integer
Whether the message is a system message. 1: Yes
Error Codes
The returned HTTP status code for this API is always 200 unless a network error (such as error 502) occurs. The specific error code and details can be found in the response fields ErrorCode and ErrorInfo respectively.
For public error codes (60000 to 79999), see Error Codes.
The following table describes the error codes specific to this API:
Error Code
Description
10002
Internal server error. Try again.
10003
Invalid command word.
10004
Invalid parameter. Check the error description and troubleshoot the issue.
10007
No operation permissions. The operator must have permissions to perform corresponding operations.
10010
The group does not exist or has been deleted.
10015
Invalid group ID. Use the correct group ID.
API Debugging Tool
Use the RESTful API online debugging tool to debug this API.
References
Setting the Unread Message Count of a Member (v4/group_open_http_svc/set_unread_msg_num)

Background
Feature Overview
API Calling Description
Error Codes
API Debugging Tool
References

Group Type ID	Support for This RESTful API
Private	Yes. Same as work groups (Work) in the new version.
Public	Yes
ChatRoom	Yes. Same as meeting groups (Meeting) in the new version.
AVChatRoom	No
Community	Yes

Parameter	Description
xxxxxx	Domain name corresponding to the country/region where your SDKAppID is located. China: `console.tim.qq.com` Singapore: `adminapisgp.im.qcloud.com` Seoul: `adminapikr.im.qcloud.com` Frankfurt: `adminapiger.im.qcloud.com` Silicon Valley: `adminapiusa.im.qcloud.com` Jakarta: `adminapiidn.im.qcloud.com`
v4/group_open_http_svc/group_msg_get_simple	The request API
sdkappid	SDKAppID assigned by the Chat console when an app is created
identifier	App admin account. For more information, see the App Admin section in Login Authentication.
usersig	Signature generated by the app admin account. For details, see Generating UserSig.
random	A random 32-bit unsigned integer ranging from 0 to 4294967295.
contenttype	Request format. The value is fixed to `json`.

Field	Type	Required	Description
GroupId	String	Yes	The ID of the group of which messages are to be pulled
ReqMsgNumber	Integer	Yes	The number of historical messages to be pulled. At present, a maximum of 20 historical messages can be returned per request. Therefore, please set the value of this field to 20 or less.
ReqMsgSeq	Integer	No	The maximum seq of the messages to be pulled
WithRecalledMsg	Integer	Optional	Whether to pull recalled messages. `1`: pull recalled messages. Recalled messages are not pulled by default.
TopicId	String	No	ID of the topic for which messages are pulled. This field applies only to topic-enabled communities.

Error Code	Description
10002	Internal server error. Try again.
10003	Invalid command word.
10004	Invalid parameter. Check the error description and troubleshoot the issue.
10007	No operation permissions. The operator must have permissions to perform corresponding operations.
10010	The group does not exist or has been deleted.
10015	Invalid group ID. Use the correct group ID.