java Google Drive API V3分段和可恢复上传

Question

到目前为止，我在编写大文件的分段且可恢复的上载（> 5MB时需要帮助，到目前为止，我只能启动一次多载上载，但是无论用户暂停还是在网络故障期间，我都不知道如何恢复它。

通过“恢复”，我是说我不知道​​如何

1）获取已经上传到驱动器的总字节数>

2）如何在内容范围标题中使用该值

3）甚至如何通过用户交互来暂停此上传[executeAsInputStream()也许？]

这是我到目前为止所做的。即使我要强制停止应用程序并重新启动它，我也需要从停止上传的地方恢复代码]

   Drive service = GDrive.getService(); //Drive Specific Initialization Copied From QuickStart But with DriveScopes.FILES

   File fileMetadata = new File();
   fileMetadata.setName("Video.mp4"); //Video File
   fileMetadata.setMimeType("application/vnd.google-apps.video");

   java.io.File filePath = new java.io.File("E:\\large-file-60MB.mp4");//Large File Of 60 Mega Bytes
   FileContent mediaContent = new FileContent("video/mp4",filePath);

   Drive.Files.Create create=service.files().create(fileMetadata,mediaContent);

   MediaHttpUploader uploader=create.getMediaHttpUploader();
   uploader.setDirectUploadEnabled(false);                       //Use Resumable MultiPart Upload Protocol
   uploader.setChunkSize(2*MediaHttpUploader.MINIMUM_CHUNK_SIZE); //Chunks Of Bytes To Upload With Each Request

  // HttpHeaders headers=new HttpHeaders();
  // headers.put("Content-Range",?);          //This is not actual code which I used here but after reading the drive docs they talk about this header and I am not sure how or when to use it
  // uploader.setInitiationHeaders(headers);

   uploader.setProgressListener((uploading)->
   {
    switch (uploading.getUploadState())
    {
      case INITIATION_STARTED:System.out.println("Initiation has started!");
      break;
      case INITIATION_COMPLETE:System.out.println("Initiation is complete!");
      break;
      case MEDIA_IN_PROGRESS:
      System.out.println("Progress="+uploading.getProgress());
      System.out.println("Bytes="+uploading.getNumBytesUploaded());
      break;
      case MEDIA_COMPLETE:System.out.println("Upload is complete!");
    }
   });

   create.execute(); 
    

到目前为止，我在编写大文件（> 5MB）的分段且可恢复的上载时需要帮助，我只能启动一次多载上载，但是我不知道如何在用户暂停时恢复它……

Answer 1

虽然在一个答案中回答多个问题通常不适合Stackoverflow，但似乎所有这些都紧密相连，因此将概述可恢复上传，并尝试解决您的三点：