如何通过单个API调用下载指定OneDrive附件链接的文件？

Absolutely! You don’t need to slog through those multi-step folder-traversal API calls anymore. Microsoft Graph supports direct path-based addressing for OneDrive items, which lets you download your target file in a single request.

Here’s how to build the call: #

First, break down your original OneDrive link:

https://company-my.sharepoint.com/personal/drive_name/Documents/Microsoft Teams Chat Files/hr.pak

Extract two key details:

1. User Principal Name (UPN): The drive_name in the URL is a URL-encoded version of the user’s UPN (for example, if the actual UPN is jane.smith@company.com, SharePoint might encode it as jane_smith_company_com). Convert this back to the user’s real UPN (you can confirm this via the Microsoft 365 admin center or a quick GET https://graph.microsoft.com/v1.0/users call to list organization users).
2. Relative File Path: The path to the file from the OneDrive root: /Documents/Microsoft Teams Chat Files/hr.pak

Plug these into this single Graph API request:

GET https://graph.microsoft.com/v1.0/users/{userPrincipalName}/drive/root:/Documents/Microsoft Teams Chat Files/hr.pak:/content

How this works: #

• The :/{path}:/content syntax tells Graph to directly locate the item at the specified path under the user’s OneDrive root, then return its raw binary content immediately.
• This call will send back the file’s binary data, which you can save directly as hr.pak using your HTTP client or browser.

Alternative (if you have the Drive Item ID): #

If you already have the unique driveItemId of the file (you can grab this once via a quick path lookup), you can use this even shorter call:

GET https://graph.microsoft.com/v1.0/drives/{driveId}/items/{driveItemId}/content

But for your scenario, the path-based approach is more straightforward since you already have the file’s location from the SharePoint link.

内容的提问来源于stack exchange，提问作者Sameer