S3 upload is failing when data is read from stdin

[PrasadG193]

I am trying to upload the output of a command using a pipe, while doing so, Put() fails with the following error.

2020/11/23 13:43:37 PutObject, putting object: ReadRequestBody: unable to initialize upload
caused by: seek /dev/stdin: illegal seek

This is the sample code for repro:

package main

import (
        "log"
        "os"

        "github.com/graymeta/stow"
        _ "github.com/graymeta/stow/s3"
)

func main() {
        accessKeyId := os.Getenv("S3ACCESSKEYID")
        secretKey := os.Getenv("S3SECRETKEY")
        region := os.Getenv("S3REGION")
        bucket := os.Getenv("S3BUCKET")

        if accessKeyId == "" || secretKey == "" || region == "" || bucket == "" {
                log.Println("skipping test because missing one or more of S3ACCESSKEYID S3SECRETKEY S3REGION S3BUCKET")
                os.Exit(1)
        }

        config := stow.ConfigMap{
                "access_key_id": accessKeyId,
                "secret_key":    secretKey,
                "region":        region,
        }

        location, err := stow.Dial("s3", config)
        if err != nil {
                log.Fatal(err)
        }
        defer location.Close()

        c, err := location.Container(bucket)
        if err != nil {
                log.Fatal(err)
        }

        _, err = c.Put("test-stream", os.Stdin, 0, nil)
        if err != nil {
                log.Fatal(err)
        }
}

Output:

$ echo "sample text" | go run main.go 
2020/11/23 13:43:37 PutObject, putting object: ReadRequestBody: unable to initialize upload
caused by: seek /dev/stdin: illegal seek
exit status 1