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GeneratePresignedURL.go
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/
GeneratePresignedURL.go
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// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
// snippet-start:[s3.go.generate_presigned_url]
package main
// snippet-start:[s3.go.generate_presigned_url.imports]
import (
"flag"
"fmt"
"time"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/s3"
)
// snippet-end:[s3.go.generate_presigned_url.imports]
// GetPresignedURL creates a presigned URL for a bucket object
// Inputs:
//
// sess is the current session, which provides configuration for the SDK's service clients
// bucket is the name of the bucket
// key is the key of the object
//
// Output:
//
// If success, the presigned URL, which is valid for 15 minutes, for the object and nil
// Otherwise, an empty string and an error from the call to GetObjectRequest or Presign
func GetPresignedURL(sess *session.Session, bucket, key *string) (string, error) {
// snippet-start:[s3.go.generate_presigned_url.call]
svc := s3.New(sess)
req, _ := svc.GetObjectRequest(&s3.GetObjectInput{
Bucket: bucket,
Key: key,
})
urlStr, err := req.Presign(15 * time.Minute)
// snippet-end:[s3.go.generate_presigned_url.call]
if err != nil {
return "", err
}
return urlStr, nil
}
func main() {
// snippet-start:[s3.go.generate_presigned_url.args]
bucket := flag.String("b", "", "The bucket")
key := flag.String("k", "", "The object key")
flag.Parse()
if *bucket == "" || *key == "" {
fmt.Println("You must supply a bucket name (-b BUCKET) and object key (-k KEY)")
return
}
// snippet-end:[s3.go.generate_presigned_url.args]
// snippet-start:[s3.go.generate_presigned_url.session]
sess := session.Must(session.NewSessionWithOptions(session.Options{
SharedConfigState: session.SharedConfigEnable,
}))
// snippet-end:[s3.go.generate_presigned_url.session]
urlStr, err := GetPresignedURL(sess, bucket, key)
if err != nil {
fmt.Println("Got an error retrieving a presigned URL:")
fmt.Println(err)
return
}
// snippet-start:[s3.go.generate_presigned_url.print]
fmt.Println("The presigned URL: " + urlStr + " is valid for 15 minutes")
// snippet-end:[s3.go.generate_presigned_url.print]
}
// snippet-end:[s3.go.generate_presigned_url]