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s3.go
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s3.go
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// Copyright 2018 The OpenPitrix Authors. All rights reserved.
// Use of this source code is governed by a Apache license
// that can be found in the LICENSE file.
package repoiface
import (
"bytes"
"context"
"fmt"
"io/ioutil"
neturl "net/url"
"path"
"strings"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/credentials"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/s3"
"openpitrix.io/openpitrix/pkg/logger"
"openpitrix.io/openpitrix/pkg/util/jsonutil"
)
type S3Interface struct {
url *neturl.URL
accessKeyId string
secretAccessKey string
bucket string
prefix string
config *aws.Config
}
type S3Credential struct {
AccessKeyId string `json:"access_key_id"`
SecretAccessKey string `json:"secret_access_key"`
}
func NewS3Interface(ctx context.Context, u *neturl.URL, credential string) (*S3Interface, error) {
var s3Credential S3Credential
err := jsonutil.Decode([]byte(credential), &s3Credential)
if err != nil {
return nil, ErrDecodeJsonFailed
}
if s3Credential.AccessKeyId == "" {
return nil, ErrEmptyAccessKeyId
}
if s3Credential.SecretAccessKey == "" {
return nil, ErrEmptySecretAccessKey
}
accessKeyId := s3Credential.AccessKeyId
secretAccessKey := s3Credential.SecretAccessKey
// e.g. s3://s3.us-east-2.amazonaws.com/my-openpitrix
creds := credentials.NewStaticCredentials(accessKeyId, secretAccessKey, "")
var region, endpoint, bucket, prefix string
bucket, prefix = getBucketPrefix(u.Path)
if strings.HasPrefix(u.Host, "s3.") {
region = strings.Split(u.Host, ".")[1]
endpoint = fmt.Sprintf("https://%s", u.Host)
} else {
// If using alternative s3 endpoint (e.g. Minio) default region to us-east-1
region = "us-east-1"
endpoint = fmt.Sprintf("http://%s", u.Host)
}
config := &aws.Config{
Region: aws.String(region),
Endpoint: aws.String(endpoint),
DisableSSL: aws.Bool(strings.HasPrefix(endpoint, "http://")),
S3ForcePathStyle: aws.Bool(endpoint != ""),
Credentials: creds,
}
return &S3Interface{
url: u,
accessKeyId: accessKeyId,
secretAccessKey: secretAccessKey,
config: config,
bucket: bucket,
prefix: prefix,
}, nil
}
func (i *S3Interface) getService(ctx context.Context) (*s3.S3, error) {
sess, err := session.NewSession(i.config)
if err != nil {
logger.Error(ctx, "Connect to s3 [%s] failed: %+v", i.url, err)
return nil, err
}
svc := s3.New(sess)
return svc, err
}
func (i *S3Interface) CheckFile(ctx context.Context, filename string) (bool, error) {
svc, err := i.getService(ctx)
if err != nil {
return false, err
}
_, err = svc.HeadObject(&s3.HeadObjectInput{
Bucket: aws.String(i.bucket),
Key: aws.String(path.Join(i.prefix, GetFileName(filename))),
})
if err != nil {
logger.Error(ctx, "Failed to read file [%s] from s3 [%s], error: %+v", filename, i.url, err)
return false, nil
}
return true, nil
}
func (i *S3Interface) ReadFile(ctx context.Context, filename string) ([]byte, error) {
svc, err := i.getService(ctx)
if err != nil {
return nil, err
}
output, err := svc.GetObject(&s3.GetObjectInput{
Bucket: aws.String(i.bucket),
Key: aws.String(path.Join(i.prefix, GetFileName(filename))),
})
if err != nil {
logger.Error(ctx, "Failed to read file [%s] from s3 [%s], error: %+v", filename, i.url, err)
return nil, err
}
body, err := ioutil.ReadAll(output.Body)
if err != nil {
return nil, err
}
return body, nil
}
func (i *S3Interface) DeleteFile(ctx context.Context, filename string) error {
svc, err := i.getService(ctx)
if err != nil {
return err
}
_, err = svc.DeleteObject(&s3.DeleteObjectInput{
Bucket: aws.String(i.bucket),
Key: aws.String(path.Join(i.prefix, GetFileName(filename))),
})
if err != nil {
logger.Error(ctx, "Failed to delete file [%s] from s3 [%s], error: %+v", filename, i.url, err)
return err
}
return nil
}
func (i *S3Interface) WriteFile(ctx context.Context, filename string, data []byte) error {
svc, err := i.getService(ctx)
if err != nil {
return err
}
_, err = svc.PutObject(&s3.PutObjectInput{
Bucket: aws.String(i.bucket),
Key: aws.String(path.Join(i.prefix, GetFileName(filename))),
Body: bytes.NewReader(data),
})
if err != nil {
logger.Error(ctx, "Failed to write file [%s] to s3 [%s], error: %+v", filename, i.url, err)
return err
}
return nil
}
func (i *S3Interface) CheckRead(ctx context.Context) error {
svc, err := i.getService(ctx)
if err != nil {
return err
}
_, err = svc.HeadBucket(&s3.HeadBucketInput{
Bucket: aws.String(i.bucket),
})
if err != nil {
logger.Error(ctx, "Failed to get bucket info from s3 [%s], error: %+v", i.url, err)
}
return err
}
func (i *S3Interface) CheckWrite(ctx context.Context) error {
return i.WriteFile(ctx, ".openpitrix.test", []byte{})
}