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// Upload Managers
//
// The s3manager package's Uploader provides concurrent upload of content to S3
// by taking advantage of S3's Multipart APIs. The Uploader also supports both
// io.Reader for streaming uploads, and will also take advantage of io.ReadSeeker
// for optimizations if the Body satisfies that type. Once the Uploader instance
// is created you can call Upload concurrently from multiple goroutines safely.
//
// // The session the S3 Uploader will use
// sess := session.Must(session.NewSession())
//
// // Create an uploader with the session and default options
// uploader := s3manager.NewUploader(sess)
//
// f, err := os.Open(filename)
// if err != nil {
// return fmt.Errorf("failed to open file %q, %v", filename, err)
// }
//
// // Upload the file to S3.
// result, err := uploader.Upload(&s3manager.UploadInput{
// Bucket: aws.String(myBucket),
// Key: aws.String(myString),
// Body: f,
// })
// if err != nil {
// return fmt.Errorf("failed to upload file, %v", err)
// }
// fmt.Printf("file uploaded to, %s\n", aws.StringValue(result.Location))
//
// See the s3manager package's Uploader type documentation for more information.
// https://docs.aws.amazon.com/sdk-for-go/api/service/s3/s3manager/#Uploader
//
// Download Manager
//
// The s3manager package's Downloader provides concurrently downloading of Objects
// from S3. The Downloader will write S3 Object content with an io.WriterAt.
// Once the Downloader instance is created you can call Download concurrently from
// multiple goroutines safely.
//
// // The session the S3 Downloader will use
// sess := session.Must(session.NewSession())
//
// // Create a downloader with the session and default options
// downloader := s3manager.NewDownloader(sess)
//
// // Create a file to write the S3 Object contents to.
// f, err := os.Create(filename)
// if err != nil {
// return fmt.Errorf("failed to create file %q, %v", filename, err)
// }
//
// // Write the contents of S3 Object to the file
// n, err := downloader.Download(f, &s3.GetObjectInput{
// Bucket: aws.String(myBucket),
// Key: aws.String(myString),
// })
// if err != nil {
// return fmt.Errorf("failed to download file, %v", err)
// }
// fmt.Printf("file downloaded, %d bytes\n", n)
//
// See the s3manager package's Downloader type documentation for more information.
// https://docs.aws.amazon.com/sdk-for-go/api/service/s3/s3manager/#Downloader
//
// Get Bucket Region
//
// GetBucketRegion will attempt to get the region for a bucket using a region
// hint to determine which AWS partition to perform the query on. Use this utility
// to determine the region a bucket is in.
//
// sess := session.Must(session.NewSession())
//
// bucket := "my-bucket"
// region, err := s3manager.GetBucketRegion(ctx, sess, bucket, "us-west-2")
// if err != nil {
// if aerr, ok := err.(awserr.Error); ok && aerr.Code() == "NotFound" {
// fmt.Fprintf(os.Stderr, "unable to find bucket %s's region not found\n", bucket)
// }
// return err
// }
// fmt.Printf("Bucket %s is in %s region\n", bucket, region)
//
// See the s3manager package's GetBucketRegion function documentation for more information
// https://docs.aws.amazon.com/sdk-for-go/api/service/s3/s3manager/#GetBucketRegion
//
// S3 Crypto Client
//
// The s3crypto package provides the tools to upload and download encrypted
// content from S3. The Encryption and Decryption clients can be used concurrently
// once the client is created.
//
// sess := session.Must(session.NewSession())
//
// // Create the decryption client.
// svc := s3crypto.NewDecryptionClient(sess)
//
// // The object will be downloaded from S3 and decrypted locally. By metadata
// // about the object's encryption will instruct the decryption client how
// // decrypt the content of the object. By default KMS is used for keys.
// result, err := svc.GetObject(&s3.GetObjectInput {
// Bucket: aws.String(myBucket),
// Key: aws.String(myKey),
// })
//
// See the s3crypto package documentation for more information.
// https://docs.aws.amazon.com/sdk-for-go/api/service/s3/s3crypto/
//
package s3
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