main.go

package main

import (
	"bufio"
	"bytes"
	"compress/gzip"
	"fmt"
	"github.com/mitchellh/goamz/aws"
	"github.com/mitchellh/goamz/s3"
	"io"
	"log"
	"os"
)

func main() {
	auth, err := aws.EnvAuth()
	if err != nil {
		log.Fatal(err)
	}
	client := s3.New(auth, aws.EUCentral)

	bucket := client.Bucket("c1incoming")

	content, err := os.Open("testfile2-orig")
	defer content.Close()

	var b bytes.Buffer
	w1 := bufio.NewWriter(&b)
	w := gzip.NewWriter(w1)
	io.Copy(w, content)
	w.Close()
	output := bytes.NewReader(b.Bytes())

	gzippedSize := int64(b.Len())
	log.Printf("having %s bytes in the buffer", gzippedSize)

	var headers = map[string][]string{
		"Content-Encoding": {"gzip"},
		"Content-Type":     {"application/text"},
	}
	err = bucket.PutReaderHeader("test", output, int64(len(b.Bytes())), headers, s3.PublicRead)

	if err != nil {
		log.Print(err)
	}

	resp, err := client.ListBuckets()
	log.Print(fmt.Sprintf("%T %+v", resp.Buckets[0], resp.Buckets[0]))
}

how could the transparent gziping be simplyfied?