s3_presign.go

package main

import (
	"log"
	"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() {
	sess, err := session.NewSession(&aws.Config{
		Credentials: credentials.NewStaticCredentials(
			"aws_access_key_id",
			"aws_secret_access_key",
			"",
		),
		Region: aws.String("us-west-1")},
	)

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

	req, _ := svc.GetObjectRequest(&s3.GetObjectInput{
		Bucket: aws.String("bucket-name"),
		Key:    aws.String("object-key"),
	})

	urlStr, err := req.Presign(1 * time.Minute)

	if err != nil {
		log.Println("Failed to sign request", err)
	}

	log.Println("The URL is", urlStr)
}