A simple function to generate s3 presigned url in Go

generate-s3-presigned-url.go

func GetS3PresignedUrl(bucket string, key string, region string, expiration time.Duration) string {
	// Initialize a session in the target region that the SDK will use to load
	// credentials from the shared credentials file ~/.aws/credentials.
	sess, err := session.NewSession(&aws.Config{
		Region: aws.String(region)},
	)

	// Create S3 service client
	svc := s3.New(sess)

	// Construct a GetObjectRequest request
	req, _ := svc.GetObjectRequest(&s3.GetObjectInput{
		Bucket: aws.String(bucket),
		Key:    aws.String(key),
	})

	// Presign with expiration time
	presignedUrl, err := req.Presign(expiration * time.Minute)

	// Check if it can be signed or not
	if err != nil {
		fmt.Println("Failed to sign request", err)
	}

 	// Return the presigned url
	return presignedUrl
}