forked from Altinity/clickhouse-backup
/
s3.go
178 lines (153 loc) · 4.4 KB
/
s3.go
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package storage
import (
"crypto/tls"
"io"
"net/http"
"strings"
"time"
"github.com/AlexAkulov/clickhouse-backup/config"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/aws/credentials"
"github.com/aws/aws-sdk-go/aws/defaults"
"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/pkg/errors"
)
// S3 - presents methods for manipulate data on s3
type S3 struct {
session *session.Session
Config *config.S3Config
}
// Connect - connect to s3
func (s *S3) Connect() error {
var err error
awsDefaults := defaults.Get()
defaultCredProviders := defaults.CredProviders(awsDefaults.Config, awsDefaults.Handlers)
// Define custom static cred provider
staticCreds := &credentials.StaticProvider{Value: credentials.Value{
AccessKeyID: s.Config.AccessKey,
SecretAccessKey: s.Config.SecretKey,
}}
// Append static creds to the defaults
customCredProviders := append([]credentials.Provider{staticCreds}, defaultCredProviders...)
creds := credentials.NewChainCredentials(customCredProviders)
var awsConfig = &aws.Config{
Credentials: creds,
Region: aws.String(s.Config.Region),
Endpoint: aws.String(s.Config.Endpoint),
DisableSSL: aws.Bool(s.Config.DisableSSL),
S3ForcePathStyle: aws.Bool(s.Config.ForcePathStyle),
MaxRetries: aws.Int(30),
}
if s.Config.DisableCertVerification {
tr := &http.Transport{
TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
}
awsConfig.HTTPClient = &http.Client{Transport: tr}
}
if s.Config.Debug {
awsConfig.LogLevel = aws.LogLevel(aws.LogDebugWithRequestErrors)
}
if s.session, err = session.NewSession(awsConfig); err != nil {
return err
}
return nil
}
func (s *S3) Kind() string {
return "S3"
}
func (s *S3) GetFileReader(key string) (io.ReadCloser, error) {
svc := s3.New(s.session)
req, resp := svc.GetObjectRequest(&s3.GetObjectInput{
Bucket: aws.String(s.Config.Bucket),
Key: aws.String(key),
})
if err := req.Send(); err != nil {
return nil, err
}
return resp.Body, nil
}
func (s *S3) PutFile(key string, r io.ReadCloser) error {
uploader := s3manager.NewUploader(s.session)
uploader.Concurrency = 10
uploader.PartSize = s.Config.PartSize
var sse *string
if s.Config.SSE != "" {
sse = aws.String(s.Config.SSE)
}
_, err := uploader.Upload(&s3manager.UploadInput{
ACL: aws.String(s.Config.ACL),
Bucket: aws.String(s.Config.Bucket),
Key: aws.String(key),
Body: r,
ServerSideEncryption: sse,
StorageClass: aws.String(strings.ToUpper(s.Config.StorageClass)),
})
return err
}
func (s *S3) DeleteFile(key string) error {
params := &s3.DeleteObjectInput{
Bucket: aws.String(s.Config.Bucket),
Key: aws.String(key),
}
_, err := s3.New(s.session).DeleteObject(params)
if err != nil {
return errors.Wrapf(err, "DeleteFile, deleting object %+v", params)
}
return nil
}
func (s *S3) GetFile(key string) (RemoteFile, error) {
svc := s3.New(s.session)
head, err := svc.HeadObject(&s3.HeadObjectInput{
Bucket: aws.String(s.Config.Bucket),
Key: aws.String(key),
})
if err != nil {
aerr, ok := err.(awserr.Error)
if ok && aerr.Code() == "NotFound" {
return nil, ErrNotFound
}
return nil, err
}
return &s3File{*head.ContentLength, *head.LastModified, key}, nil
}
func (s *S3) Walk(s3Path string, process func(r RemoteFile)) error {
return s.remotePager(s.Config.Path, false, func(page *s3.ListObjectsV2Output) {
for _, c := range page.Contents {
process(&s3File{*c.Size, *c.LastModified, *c.Key})
}
})
}
func (s *S3) remotePager(s3Path string, delim bool, pager func(page *s3.ListObjectsV2Output)) error {
params := &s3.ListObjectsV2Input{
Bucket: aws.String(s.Config.Bucket), // Required
MaxKeys: aws.Int64(1000),
}
if s3Path != "" && s3Path != "/" {
params.Prefix = aws.String(s3Path)
}
if delim {
params.Delimiter = aws.String("/")
}
wrapper := func(page *s3.ListObjectsV2Output, lastPage bool) bool {
pager(page)
return true
}
return s3.New(s.session).ListObjectsV2Pages(params, wrapper)
}
type s3File struct {
size int64
lastModified time.Time
name string
}
func (f *s3File) Size() int64 {
return f.size
}
func (f *s3File) Name() string {
return f.name
}
func (f *s3File) LastModified() time.Time {
return f.lastModified
}