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I am trying to develop a cloud file system using cloud filter APIs. I have set the Hydration policy to Partial, and it works fine when I try to play the video in Photos app. But, when I am trying to import placeholder video file in some of the video editors, full file is being downloaded.
Also, I get below error logs :
shellcommon\shell\fileexplorer\windows.fileexplorer.common\src\syncrootmanager.cpp(2595)\Windows.FileExplorer.Common.dll!00007FFA46A2DCD5: (caller: 00007FFA5C87B2FB) ReturnHr(56) tid(68ec) 80070490 Element not found.
I also tried Cloud Mirror sample app, and found same behaviour. Any ideas how to fix this ?
Maybe the video editors, in contrast with Photos, need the full file.
Hi @Umang Mital ,
Welcome to Microsoft Q&A!
As @Viorel said, it seems that your opener needs the full file. Can such behavior be reproduced in OneDrive?
I use the cloud mirror sample to open the video file and the Photos also need to download it complete. In order to diagnose whether this is an unexpected behavior, could you please provide detailed steps to reproduce?
Thank you
Junjie
Thanks for your response.
I have verified using CloudMirror sample app, Dropbox and Lucid Link. Dropbox and Lucid Link are able to open the file without full file download. So, I am sure opener is not requesting complete file download.
However, with CloudMirror app and my app, I get request for full file range in FETCH_DATA callback. With OneDrive, I am not able to get partial download working for any case, whenever I try to access the file using any app it download the complete file, so have not verified with OneDrive. Could there be a case that usage of any other window32 API in the opener is producing this behavior? as I mentioned when using OS open file dialog, I face this issue, but I import using opener native media browser, I don't face this issue. s
Hi @Umang Mital ,
I will discuss with the team if this is a normal behavior.
Hi @Umang Mital ,
After discussing with the team, could you provide specific steps to reproduce your problem in Cloud Mirror Sample.
This document introduces the Hydration Policies.
The hydration policy of a cloud file is determined at the file open time by this formula:
File hydration policy = max(app hydration policy, provider hydration policy)
So the hydration policy is to take the maximum value of the application's and provider's hydration policy.
This is also related to your open program.
Sure, I will try to create a small sample app which reproduces the problem with Cloud Filter app and share with you.
Yes, I also checked this documentation, but was not able to see, how I can verify hydration policy for any app ?
Moreover, I see the issue is happening only when I am using OS dialog for importing the file, in other cases, where app is directly requesting partial data, only partial data is downloaded. However, using dropbox file system, partial data is downloaded even when using OS dialog for importing the file.
I have verified, it's not the video editor that need the whole file. It is only requesting few bytes, but whenever I try to open a file using OS dialog, it starts downloading whole file.