How to use Accelerated endpoint for presigned upload URLs?

[nchandupatla]

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• [ x] I've gone though Developer Guide and API reference
• [x ] I've checked AWS Forums and StackOverflow for answers

Describe the question

I'm planning to provide users with an option to upload files using presigned upload URLs.
To provide fast uploads/downloads, We enabled Transfer acceleration on our bucket but I couldn't able to find a way to use this new Accelerated endpoint.
Please let me know how to request for presigned URL using the new Accelerated endpoint?

Below is the sample program using which I'm experimenting with accelerated endpoint performance.

any help would be appreciated. Thanks

package main

import (
	"crypto/md5"
	"encoding/base64"
	"fmt"
	"io"
	"io/ioutil"
	"net/http"
	"os"
	"strconv"
	"strings"
	"time"

	"github.com/aws/aws-sdk-go/aws"
	"github.com/aws/aws-sdk-go/aws/session"
	"github.com/aws/aws-sdk-go/service/s3"
)

func main() {
	h := md5.New()
	content := strings.NewReader("Hello")
	content.WriteTo(h)

	file, err := ioutil.ReadFile("/test.pdf")
	filemeta, err := os.Open("/test.pdf")

	fstat, err := filemeta.Stat()
	hash := md5.New()
	_, err = io.Copy(hash, strings.NewReader(string(file)))

	if err != nil {
		panic(err)
	}
	md5s := base64.StdEncoding.EncodeToString(hash.Sum(nil))
	sess, err := session.NewSession(&aws.Config{
		Region: aws.String("us-east-2"),
		S3UseAccelerate: aws.Bool(true),
	},
	)
	// Create S3 service client
	svc := s3.New(sess)

	var size int64
	size = fstat.Size()
	resp, _ := svc.PutObjectRequest(&s3.PutObjectInput{
		Bucket: aws.String("test"),
		Key:    aws.String("testaccel"),
		ContentLength: &size,
		ContentType: aws.String("mp4"),
		ContentMD5: aws.String(md5s),
	})

	url, err := resp.Presign(15 * time.Minute)
	if err != nil {
		fmt.Println("error presigning request", err)
		return
	}
	fmt.Printf("presigning %v \n", url)
	t1 := time.Now()

	req, err := http.NewRequest("PUT", url, strings.NewReader(string(file)))
	req.Header.Set("content-md5", md5s)
	req.Header.Set("content-length", strconv.Itoa(int(size)))
	req.Header.Set("content-type", "mp4")
	if err != nil {
		fmt.Println("error creating request", url)
		return
	}

	defClient, err := http.DefaultClient.Do(req)
	diff := time.Now().Sub(t1)
	fmt.Println("time took ", diff)
	fmt.Println(defClient, err)
}