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enforce_content_md5.go
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/
enforce_content_md5.go
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// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
package main
import (
"crypto/md5"
"encoding/base64"
"fmt"
"net/http"
"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"
)
// Downloads an item from an S3 Bucket in the region configured in the shared config
// or AWS_REGION environment variable.
//
// Usage:
//
// go run s3_download.go
func main() {
h := md5.New()
content := strings.NewReader("")
content.WriteTo(h)
// Initialize a session in us-west-2 that the SDK will use to load
// credentials from the shared credentials file ~/.aws/credentials.
sess, err := session.NewSession(&aws.Config{
Region: aws.String("us-west-2")},
)
// Create S3 service client
svc := s3.New(sess)
resp, _ := svc.PutObjectRequest(&s3.PutObjectInput{
Bucket: aws.String("testBucket"),
Key: aws.String("testKey"),
})
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(""))
req.Header.Set("Content-MD5", md5s)
if err != nil {
fmt.Println("error creating request", url)
return
}
defClient, err := http.DefaultClient.Do(req)
fmt.Println(defClient, err)
}