如何将未经授权的用户共享OneDrive文件缩略图？现在，旧API中提供的这个有用的OneDrive功能已被破坏

2 回答

• 0

  您需要调用以下API：

  GET /drive/items/{item-id}/thumbnails/{thumb-id}/{size}/content

  此调用需要使用授权并将重定向返回到 cache-safe 缩略图位置 . 然后，您可以使用此新网址为未经身份验证的用户提供缩略图 .

  例如

  请求：

  GET https://api.onedrive.com/v1.0/drive/items/D094522DE0B10F6D!152/thumbnails/0/small/content
  Authorization: bearer <access token>
  

  响应：

  HTTP/1.1 302 Found
  Location: https://qg3u2w.bn1302.livefilestore.com/y3m1LKnRaQvGEEhv_GU3mVsewg_-aizIXDaVczGwGFIqtNcVSCihLo7s2mNdUrKicuBnB2sGlSwMQTzQw7v34cHLkchKHL_5YC3IMx1SMcpndtdb9bmQ6y2iG4id0HHgCUlgctvYsDrE24XALwXv2KWRUwCCvDJC4hlkqYgnwGBUSQ
  

  您现在可以使用 Location Headers 中的链接访问缩略图而无需登录 . 仅当文件内容发生更改时，此URL才会更改 .

  您可以在文档here中阅读更多内容 .

  回复于 2024-04-30T14:52:17+08:00
• 0

  我刚想通了 . 它基于Microsoft本文中的信息...

  https://docs.microsoft.com/en-ca/onedrive/developer/rest-api/api/driveitem_list_thumbnails?view=odsp-graph-online

  ...查看“列出DriveItems时获取缩略图”部分 . 它显示了来自调用的相关JSON返回结构，例如：

  GET / me / drive / items / / children？$ expand =缩略图

  基本上，JSON返回结构为每个缩略图格式提供了字符串URL . 然后创建URLSession以上传这些URL（一旦你将它们从String转换为URL）

  以下是使用Swift（Apple）的代码摘录：

  ////////////////////////////////////////////////////////////////////////////////
  //
  // Download a thumbnail with a URL and label the URLSession with an ID.
  //
  func downloadThumbnail(url: URL, id: String) {
  
      // Create a URLSession. This is an object that controls the operation or flow
      // control with respect to asynchronous operations. It sets the callback delegate
      // when the operation is complete.
      let urlSession: URLSession = {
          //let config = URLSessionConfiguration.default
          let config = URLSessionConfiguration.background(withIdentifier: id)
          config.isDiscretionary = true
          config.sessionSendsLaunchEvents = true
          //config.identifier = "file download"
          return URLSession(configuration: config, delegate: self as URLSessionDelegate, delegateQueue: OperationQueue.main)
      }()
  
      // Create the URLRequest. This is needed so that "Authorization" can be made, as well
      // as the actual HTTP command. The url, on initialization, is the command... along
      // with the "GET" setting of the httpMethod property.
      var request = URLRequest(url: url)
  
      // Set the Authorization header for the request. We use Bearer tokens, so we specify Bearer + the token we got from the result
      request.setValue("Bearer \(self.accessToken)", forHTTPHeaderField: "Authorization")
      request.httpMethod = "GET"
      request.setValue("application/json", forHTTPHeaderField: "Content-Type")
  
      // This initiates the asynchronous data task
      let backgroundTask = urlSession.downloadTask(with: request)
      //backgroundTask.earliestBeginDate = Date().addingTimeInterval(60 * 60)
      backgroundTask.countOfBytesClientExpectsToSend = 60
      backgroundTask.countOfBytesClientExpectsToReceive = 15 * 1024
      backgroundTask.resume()
  
  }
  

  ...当然你需要有正确的“accessToken”（如上所示），但你还必须为URLSession编写通用的回调函数，即：

  func urlSession(_ session: URLSession, downloadTask: URLSessionDownloadTask,
                  didFinishDownloadingTo location: URL) {
  
      Swift.print("DEBUG: urlSession callback reached")
  
      // This was the identifier that you setup URLSession with
      let id = session.configuration.identifier
  
      // "location" is the temporary URL that the thumbnail was downloaded to
      let temp = location
  
      // You can convert this URL into any kind of image object. Just Google it!
  }
  

  干杯，安德烈亚斯

  回复于 2024-04-30T14:52:17+08:00