MinIO Uploading a file with name containing especial characters issues an HTTP 403 Forbidden - minio

Question

Uploading an object from a .net webclient to MinIO where the object contains special characters in the name issues an HTTP 403.
This object fails: old_me_bold+19(1).jpg
This object is ok: old_me_bold19.jpg
The message is:
The request signature we calculated does not match the signature you provided. Check your key and signing method.
What is breaking in MinIO?

Answer 1

Encoding the Url did not work either. I also tried PresignedPutObjectAsync to create a tmp Url already signed then I did a PUT using an HttpClient with the same result. To test that this way would work, I removed the special characters from the name of the file and the client was able to send the file to MinIO.
This code fails:
public async System.Threading.Tasks.Task PutAttachementAsync(
Attachment attachment,
string bukectName,
string objectName,
string attachmentType = "application/octet-stream")
{
using (HttpClient client = new HttpClient())
{
var minioClient = GetMinioClient();
client.BaseAddress = new Uri(Config.Instance.GetConfig("MinIOURL"));
var tempFileName = CreateAttachmentTempFile(attachment, out bool virusScanResult);
if (!virusScanResult)
return;
using (FileStream str = new FileStream(tempFileName.FileAttachmentPath, FileMode.Open))
{
try
{
String signedTMPUrl = await minioClient.PresignedPutObjectAsync(bukectName, objectName, 60 * 60 * 24);
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue(attachmentType));
HttpResponseMessage response = await client.PutAsync(signedTMPUrl, new StreamContent(str));
if (response.IsSuccessStatusCode)
{
Log.InfoFormat("Request Message Information:- \n\n" + response.RequestMessage + "\n");
Log.InfoFormat("Response Message Header \n\n" + response.Content.Headers + "\n");
}
else
{
Log.InfoFormat("{0} ({1})", (int)response.StatusCode, response.ReasonPhrase);
}
}
catch (MinioException e)
{
Log.Error("Error occurred: " + e.Message);
}
}
}
}
That code is running from an ASP.Net application hosted in IIS. I wonder if IIS is injecting something into the header before the message goes to MinIO.
Any other file that I send to MinIO, if the name does not contain characters such as (), then the upload works always.