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I have been trying to replicate backup files on S3 bucket and one of my machines, which belongs to french culture, and the images it generated contains grave-accent marks in the file names for eg: Backup/Récupération12_VOL-b003.sp1.

I have been struggling really hard to upload it via C# code and when I am trying to hit an API to list multipart uploads. I get a 403 error with this message.

Code: SignatureDoesNotMatch Message: The request signature we
calculated does not match the signature you provided. Check your key
and signing method.

However, if I am trying to upload such files directly from a AWS S3 console, it get's uploaded without any problem.

I have tried passing encoding type (UTF-8) as well with the GET request but still the issue seems unsolvable.

I will really appreciate your help on this.

Please find the below GET request for your reference.

CanonicalRequest: GET/
encoding-type=UTF-8&prefix=Backup%2FR%C3%A9cup%C3%A9ration12_VOL-b003sp1&uploads=host:testbuckettoday12052022.s3.ap-south-1.amazonaws.com
x-amz-checksum-algorithm:SHA256
x-amz-content-sha256:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
x-amz-date:20220512T073347Z
Izaq110
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1 Answers1

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I found no problem. Here's the example code I used to test the upload to S3 for the same filename with grave accent marks.

https://www.example-code.com/csharp/s3_upload_with_accented_chars_in_filename.asp

Chilkat Software
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  • Inside the logs attached, a GET request has been performed for uploading files using Multipart uploads. The issue is with calling a GET operation. Please help. The actual filename looks like this "Récupération_VOL-b001.spf" – Izaq110 Dec 27 '22 at 09:34