presign.go

package main

import (
    "github.com/aws/aws-sdk-go/aws"
    "github.com/aws/aws-sdk-go/aws/session"
    "github.com/aws/aws-sdk-go/service/s3"
    "log"
    "time"
)

// Downloads an item from an S3 Bucket
//
// Usage:
//    go run s3_download.go
func main() {
    // 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-east-1")},
    )
    // Create S3 service client
    svc := s3.New(sess)
    req, _ := svc.GetObjectRequest(&s3.GetObjectInput{
        Bucket: aws.String("<bucket-here>"),
        Key:    aws.String("diretorio1/namefile-uuid"),
    })
    urlStr, err := req.Presign(30 * time.Minute)
    if err != nil {
        log.Println("Failed to sign request", err)
    }
    log.Println("The URL is", urlStr)
}