/
aws.go
79 lines (70 loc) · 2.21 KB
/
aws.go
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package file_storage
import (
"fmt"
"os"
"strings"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/s3"
"github.com/aws/aws-sdk-go/service/s3/s3manager"
"github.com/dadosjusbr/storage/models"
"github.com/newrelic/go-agent/v3/newrelic"
)
type S3Client struct {
s3 *s3.S3
newrelic *newrelic.Application
bucket string
}
func NewS3Client(region string, bucket string) (*S3Client, error) {
sess, err := session.NewSession(&aws.Config{
Region: aws.String(region),
})
if err != nil {
return nil, fmt.Errorf("error creating aws session: %w", err)
}
s3Client := s3.New(sess)
return &S3Client{s3: s3Client, bucket: bucket}, nil
}
func (s S3Client) UploadFile(srcPath string, dstFolder string) (*models.Backup, error) {
txn := s.newrelic.StartTransaction("aws.UploadFile")
defer txn.End()
ctx := newrelic.NewContext(aws.BackgroundContext(), txn)
uploader := s3manager.NewUploaderWithClient(s.s3)
f, err := os.Open(srcPath)
if err != nil {
return nil, fmt.Errorf("Error opening file at %s: %v", srcPath, err)
}
defer f.Close()
_, err = uploader.UploadWithContext(ctx, &s3manager.UploadInput{
Bucket: aws.String(s.bucket),
Body: f,
Key: aws.String(dstFolder),
})
if err != nil {
return nil, fmt.Errorf("Error trying to upload file in S3 with key (%s): %v", dstFolder, err)
}
backup, err := s.GetFile(dstFolder)
if err != nil {
return nil, fmt.Errorf("Error getting backup file(%s): %q", dstFolder, err)
}
return backup, nil
}
func (s S3Client) GetFile(dstFolder string) (*models.Backup, error) {
txn := s.newrelic.StartTransaction("aws.GetFile")
defer txn.End()
ctx := newrelic.NewContext(aws.BackgroundContext(), txn)
headObjectInput := &s3.HeadObjectInput{
Bucket: aws.String(s.bucket),
Key: aws.String(dstFolder),
}
headObjectOutput, err := s.s3.HeadObjectWithContext(ctx, headObjectInput)
if err != nil {
return nil, fmt.Errorf("Error getting file metadata from (%s): %q", dstFolder, err)
}
backup := &models.Backup{
Size: *headObjectOutput.ContentLength,
Hash: strings.ReplaceAll(*headObjectOutput.ETag, "\"", ""),
URL: fmt.Sprintf("https://%s.s3.amazonaws.com/%s", s.bucket, dstFolder),
}
return backup, nil
}