[BUG] Encoding issue, cannot download files from B2 to Local HDD. Cannot encode to CP1252 on stdout

[jeffward01]

Hello!

I discovered this issue and originally thought it was a 'Connection Pool' issue which I commented here. <-- There are a few comments in this link that pertain to this current issue #778

Scenerio

• 2-3 years ago I uploaded my files from my local HDD --> Backblaze B2 Bucket.
• (Current day) | I need to download the files from my B2 Backblaze bucket to my local HDD
• When I download the files using the b2 cli tool, I cannot complete the download due to: UnicodeEncodeError: "charmap" can't encode character "\u0c7f" in position 132: character maps to <undefined>
• This error occurs in several of my files, that all have different encode character errors (not limited to: \u0c7f).

In the comments, I was speaking to [ppolewicz]https://github.com/ppolewicz and he correctly pointed out that it is an error where they b2 python CLI tool cannot encode my file names to cp1252.

Screenshots of the errors from the B2 CLI tool

Here are some screenshots of the errors using the b2 CLI tool

In the comments, I was speaking to [ppolewicz]https://github.com/ppolewicz and he correctly pointed out that it is an error where they b2 python CLI tool cannot encode my file names to cp1252.

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What I have tried

I thought that if I could identify and generate a list of the filenames which could not be encoded to cp1252, I could rename each filename to an acceptable filename which the b2 CLI tool could handle.

• I wrote a C# Console app (I can share the code if it is needed) which uses the B2.NET which is a C# .NET library that essentially queries the B2 API.
• My console app performs the following steps:
  1.) Downloads all file names (and folders)
  2.) Encodes the file names from UTF-16 to cp1252. When I receive the files from the B2 API, they are received in UTF-8 or UTF-16 format, I believe its UTF-16.
  3.) If the filename can not be encoded to cp1252, an exception would be thrown with the errors are logged, the file is marked as error within my Console App.

Expected Result:

4.) I expected that the filenames that the b2 CLI tool cannot encode to cp1252, to also throw an error within my own Console App. I expected the same files which the b2 CLI tool app has issues encoding to cp1252 also have issues within my own Console App, and my Console App would not be able to encode the same files to cp1252.

Then problematic target files that cannot be encoded to cp1252 will be marked as error within my Console App so that I could identify the problem files and rename the files using the B2 API

Actual Result:

4.) No encoding errors occurred and all file names were accurately mapped from UTF-8 or UTF-16 to cp1252 within my console app. No encoding issues occured.

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Conclusion

At this point, I am somewhat at a loss and looking for direction to how I or we should fix this. I can provide anything that you guys need to help come to a solution to fix this (I would love to help too, I also wrote a Console App to help fix this).

I can share anything that you guys need including:

• My console app source code
• List of all my file names
• etc, whatever you guys need to help diagnose this.

Thanks!

[ppolewicz]

🤔 can you write a snippet (bash, c# or b2-sdk-python maybe) which would upload a single empty file with a problematic filename? It would make things much easier to debug. Alternatively if one of the files in question is not a secret, maybe you could create a key limited to a prefix (so in reality to just one object) so that I can inspect it on your bucket?

This would be way easier to debug if I could reproduce it locally

[jeffward01]

@ppolewicz sure thing, let me give it a go and see if I can narrow it down as you suggested.

I will let you know if I have any issues narrowing it down the problematic file names in the method which you suggested, and will post my findings here.

PS: If I need to create a script, it'll be C# (I like brackets)