Discussion on technical solutions for real-time sharing of whiteboards by docking with DingTalk interface

Discussion on technical solutions for realizing real-time whiteboard sharing by docking with DingTalk interface

With the rise of remote office and online education, real-time whiteboard sharing has become an important functional requirement. As the leading enterprise-level communication and collaboration platform in China, DingTalk has strong interface docking capabilities and can provide convenient technical support for real-time whiteboard sharing functions.

1. Requirements Analysis
Real-time shared whiteboard needs to meet the characteristics of multiple people drawing online at the same time, real-time synchronization and high efficiency and stability. Based on the docking implementation of DingTalk interface, we can use the functions such as message sending, picture uploading and instant messaging provided by DingTalk to realize the core function of real-time sharing of whiteboards.

2. Technical solution

1. Create and manage sessions
   You need to create a session to host the drawing operation of the shared whiteboard. You can use the openConversation interface provided by DingTalk to create a session and manage the session through the session ID. The code example shown below creates a session and obtains the session id:

POST /chat/create?access_token=ACCESS_TOKEN

{
  "name": "实时共享白板",
  "useridlist": ["UserID1", "UserID2"],
  "agentid": 100001
}

2. Real-time synchronization of drawing operations
   In order to realize the function of multiple people drawing online at the same time, you can use DingTalk Message sending function to achieve real-time synchronization. When a user performs a drawing operation, the drawn content is uploaded to DingTalk in the form of a picture and sent to other users through messages. The code example shown below uploads pictures to DingTalk and sends messages:

POST /chat/upload?access_token=ACCESS_TOKEN&type=image

{
  "media": "@path/to/whiteboard.png"
}

POST /message/send?access_token=ACCESS_TOKEN

{
  "chatid": "CHAT_ID",
  "msgtype": "image",
  "image": {
    "media_id": "MEDIA_ID"
  }
}

3. Instant messaging and interaction
   In order to realize the real-time interaction function, you can use DingTalk’s instant messaging Communication function to realize message interaction between users. You can use DingTalk's interface to develop custom message processing logic, such as receiving and processing drawing messages and mouse operations sent by users. The code example shown below receives and processes messages sent by users:

POST /message/receive?access_token=ACCESS_TOKEN

{
  "sender": "UserID2",
  "chatid": "CHAT_ID",
  "msgtype": "text",
  "text": {
    "content": "绘制一条直线"
  }
}

4. Other functions
   In addition to real-time synchronization and interaction, some other functions can also be added to improve the user experience . For example, the undo and redo functions can be implemented by recording the user's operation history. You can use the message withdrawal function of DingTalk to realize the cancellation function. The code example shown below, withdraw the message:

POST /message/retract?access_token=ACCESS_TOKEN

{
  "userid": "UserID1",
  "messageId": "MESSAGE_ID"
}

3. Summary
The docking implementation based on the DingTalk interface can realize the core function of real-time sharing of whiteboards, allowing multiple people to draw online at the same time, Real-time synchronization and efficient and stable requirements. Through the flexible use of functions such as messaging, picture uploading, and instant messaging provided by DingTalk, convenient technical support can be provided for the real-time whiteboard sharing function.

The above is a discussion of the technical solution for realizing real-time sharing of whiteboards by docking with the DingTalk interface. I hope the content of this article can be helpful to you.

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