Excel / MS GraphAPI |无法获取 WAC 访问令牌

Question

构建一个小型 MS Graph 脚本，用于更新存储在 OneDrive 中的 Excel 工作表中的字段。 如下面的代码所示，它将字段 A1 更新为“200”。

这很大程度上是一个 WIP，后续将会更新为其他内容。

代码：

from msal import ConfidentialClientApplication
import requests

def get_access_token(client_id, tenant_id, client_secret):
    """
    Authenticate and obtain an access token using MSAL for a confidential client.
    """
    authority = f"https://login.microsoftonline.com/{tenant_id}"
    app = ConfidentialClientApplication(
        client_id,
        authority=authority,
        client_credential=client_secret
    )
    result = app.acquire_token_for_client(scopes=["https://graph.microsoft.com/.default"])
    if "access_token" in result:
        return result['access_token']
    else:
        raise Exception("Failed to acquire access token: " + result.get("error_description", ""))

def create_session(access_token, user_id, file_id):
    """
    Create a session for an Excel file to make changes that persist on a specified user's OneDrive.
    """
    url = f"https://graph.microsoft.com/v1.0/users/{user_id}/drive/items/{file_id}/workbook/createSession"
    headers = {"Authorization": f"Bearer {access_token}", "Content-Type": "application/json"}
    data = {"persistChanges": True}
    response = requests.post(url, headers=headers, json=data)
    if response.status_code == 200:
        return response.json()['id']
    else:
        raise Exception("Failed to create session: " + response.text)

def update_cell(access_token, user_id, file_id, session_id, sheet_name, cell_address, value):
    """
    Update a specific cell in the Excel sheet using a session on a specified user's OneDrive.
    """
    url = f"https://graph.microsoft.com/v1.0/users/{user_id}/drive/items/{file_id}/workbook/worksheets/{sheet_name}/range(address='{cell_address}')"
    headers = {
        "Authorization": f"Bearer {access_token}",
        "Content-Type": "application/json",
        "workbook-session-id": session_id
    }
    data = {"values": [[value]]}
    response = requests.patch(url, headers=headers, json=data)
    if response.status_code != 204:
        raise Exception("Failed to update cell: " + response.text)

def close_session(access_token, user_id, file_id, session_id):
    """
    Close the session after modifications are made to ensure changes persist on a specified user's OneDrive.
    """
    url = f"https://graph.microsoft.com/v1.0/users/{user_id}/drive/items/{file_id}/workbook/closeSession"
    headers = {
        "Authorization": f"Bearer {access_token}",
        "Content-Type": "application/json",
        "workbook-session-id": session_id
    }
    response = requests.post(url, headers=headers)
    if response.status_code != 204:
        raise Exception("Failed to close session: " + response.text)

def main():
    """
    Main function to execute the process.
    """
    CLIENT_ID = 'REMOVED'
    TENANT_ID = 'REMOVED'
    CLIENT_SECRET = 'REMOVED'
    USER_ID = 'REMOVED'
    FILE_ID = 'REMOVED'  # Directly use the known file ID
    SHEET_NAME = 'Sheet1'
    CELL_ADDRESS = 'A1'
    NEW_VALUE = '200'

    try:
        access_token = get_access_token(CLIENT_ID, TENANT_ID, CLIENT_SECRET)
        session_id = create_session(access_token, USER_ID, FILE_ID)
        update_cell(access_token, USER_ID, FILE_ID, session_id, SHEET_NAME, CELL_ADDRESS, NEW_VALUE)
        print("Cell updated successfully!")
        close_session(access_token, USER_ID, FILE_ID, session_id)
        print("Session closed successfully!")
    except Exception as e:
        print(str(e))

if __name__ == "__main__":
    main()

我遇到的错误是：

Failed to create session: {"error":{"code":"AccessDenied","message":"Could not obtain a WAC access token.","innerError":{"date":"2024-05-11T13:23:08","request-id":"89fd141b-9888-4a5d-9aa6-3951878c1c45","client-request-id":"89fd141b-9888-4a5d-9aa6-3951878c1c45"}}}

目前遇到了障碍。 任何帮助将不胜感激！

目的是能够验证、查找文件并更新单元格中的数据。 以上所有内容都是通过变量动态更改的（参见代码）。

我已检查了与此相关的权限，Microsoft Graph 都能够访问（读取）用户的信息和用户的 OneDrive。我一直在使用 Graph Explorer 来检查（并授予管理员批准）权限。

应用程序注册 > 应用程序名称 > API 权限

Answer 1

Excel 文件的文件扩展名是什么，例如 .xlsx 或 .xltm？

如果文件不是 .xlsx 格式，请考虑将其转换为 .xlsx 并使用上述 API