go presigned post

gistfile1.txt

package main

import (
	"crypto/md5"
	"encoding/base64"
	"fmt"
	"log"
	"net/http"
	"os"
	"strings"
	"time"

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

func main() {
	sdkEndpoint := os.Getenv("AWS_ENDPOINT")
	accessKey := os.Getenv("AWS_ACCESS_KEY_ID")
	secretKey := os.Getenv("AWS_SECRET_ACCESS_KEY")

	creds := credentials.NewStaticCredentials(accessKey, secretKey, "")

	s3Config := &aws.Config{
		Credentials:      creds,
		Endpoint:         aws.String(sdkEndpoint),
		Region:           aws.String("us-east-1"),
		S3ForcePathStyle: aws.Bool(true),
	}
	session, err := session.NewSession()
	if err != nil {
		fmt.Println("error presigning request", err)
		return
	}

	// Create an S3 service object in the default region.
	s3Client := s3.New(session, s3Config)

	// Output to stdout instead of the default stderr
	log.SetOutput(os.Stdout)

	resp, _ := s3Client.PutObjectRequest(&s3.PutObjectInput{
		Bucket: aws.String("testbucket"),
		Key:    aws.String("testkey"),
		Body:   strings.NewReader("test"),
	})

	h := md5.New()
	md5s := base64.StdEncoding.EncodeToString(h.Sum(nil))
	resp.HTTPRequest.Header.Set("Content-MD5", md5s)

	url, err := resp.Presign(15 * time.Minute)
	if err != nil {
		fmt.Println("error presigning request", err)
		return
	}

	req, err := http.NewRequest("PUT", url, strings.NewReader("test"))
	req.Header.Set("Content-MD5", md5s)
	if err != nil {
		fmt.Println("error creating request", url)
		return
	}

	defClient, err := http.DefaultClient.Do(req)
	if err != nil {
		fmt.Println("error making HTTP request", url)
		return
	}
	defer defClient.Body.Close()
	fmt.Println(defClient.Body, defClient.StatusCode)
}