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/
s3.go
executable file
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/
s3.go
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// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// Original source: github.com/micro/go-micro/v3/store/s3/s3.go
package s3
import (
"bytes"
"io"
"path/filepath"
"regexp"
"strings"
"github.com/2637309949/micro/v3/service/logger"
"github.com/2637309949/micro/v3/service/store"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/credentials"
"github.com/aws/aws-sdk-go/aws/session"
sthree "github.com/aws/aws-sdk-go/service/s3"
)
var doubleSlash = regexp.MustCompile("/+")
var removeCol = regexp.MustCompile(":")
func cleanKey(s string) string {
return doubleSlash.ReplaceAllLiteralString(removeCol.ReplaceAllLiteralString(s, "/"), "/")
}
// NewBlobStore returns an initialized s3 blob store
func NewBlobStore(opts ...Option) (store.BlobStore, error) {
// parse the options
options := Options{Secure: true}
for _, o := range opts {
o(&options)
}
sess := session.Must(session.NewSession(&aws.Config{
Endpoint: &options.Endpoint,
Region: &options.Region,
Credentials: credentials.NewStaticCredentials(options.AccessKeyID, options.SecretAccessKey, ""),
}))
client := sthree.New(sess)
// return the blob store
return &s3{client, &options}, nil
}
type s3 struct {
client *sthree.S3
options *Options
}
func (s *s3) Read(key string, opts ...store.BlobOption) (io.Reader, error) {
// validate the key
if len(key) == 0 {
return nil, store.ErrMissingKey
}
// make the key safe for use with s3
key = cleanKey(key)
// parse the options
var options store.BlobOptions
for _, o := range opts {
o(&options)
}
if len(options.Namespace) == 0 {
options.Namespace = "micro"
}
var err error
var res *sthree.GetObjectOutput
if len(s.options.Bucket) > 0 {
k := filepath.Join(options.Namespace, key)
res, err = s.client.GetObject(&sthree.GetObjectInput{
Bucket: &s.options.Bucket, // bucket name
Key: &k, // object name
})
} else {
res, err = s.client.GetObject(&sthree.GetObjectInput{
Bucket: &options.Namespace, // bucket name
Key: &key, // object name
})
}
if err != nil {
return nil, err
}
out := bytes.NewBuffer([]byte{})
_, err = io.Copy(out, res.Body)
if err != nil {
return nil, err
}
// return the result
return out, nil
}
func (s *s3) Write(key string, blob io.Reader, opts ...store.BlobOption) error {
// validate the key
if len(key) == 0 {
return store.ErrMissingKey
}
// make the key safe for use with s3
key = cleanKey(key)
// parse the options
var options store.BlobOptions
for _, o := range opts {
o(&options)
}
if len(options.Namespace) == 0 {
options.Namespace = "micro"
}
// if the bucket exists, write using the namespace as a filepath
buf := new(strings.Builder)
_, err := io.Copy(buf, blob)
if err != nil {
return err
}
acl := "private"
if options.Public {
acl = "public-read"
}
logger.Infof("Saving file %v with ACL %v into namespace %v", key, acl, options.Namespace)
if len(s.options.Bucket) > 0 {
k := filepath.Join(options.Namespace, key)
object := sthree.PutObjectInput{
Bucket: &s.options.Bucket,
Key: &k,
Body: strings.NewReader(buf.String()),
ACL: aws.String(acl),
ContentType: &options.ContentType,
}
_, err := s.client.PutObject(&object)
return err
}
s.client.CreateBucket(&sthree.CreateBucketInput{
Bucket: &options.Namespace,
})
k := filepath.Join(options.Namespace, key)
object := sthree.PutObjectInput{
Bucket: &s.options.Bucket,
Key: &k,
Body: strings.NewReader(buf.String()),
ACL: aws.String(acl),
ContentType: &options.ContentType,
}
_, err = s.client.PutObject(&object)
return err
}
func (s *s3) Delete(key string, opts ...store.BlobOption) error {
// validate the key
if len(key) == 0 {
return store.ErrMissingKey
}
// make the key safe for use with s3
key = cleanKey(key)
// parse the options
var options store.BlobOptions
for _, o := range opts {
o(&options)
}
if len(options.Namespace) == 0 {
options.Namespace = "micro"
}
if len(s.options.Bucket) > 0 {
k := filepath.Join(options.Namespace, key) // object name
_, err := s.client.DeleteObject(&sthree.DeleteObjectInput{
Bucket: &s.options.Bucket, // bucket name
Key: &k,
})
return err
}
k := filepath.Join(options.Namespace, key) // object name
_, err := s.client.DeleteObject(&sthree.DeleteObjectInput{
Bucket: &options.Namespace, // bucket name
Key: &k,
})
return err
}
func (s *s3) List(opts ...store.BlobListOption) ([]string, error) {
// parse the options
var options store.BlobListOptions
for _, o := range opts {
o(&options)
}
if len(options.Namespace) == 0 {
options.Namespace = "micro"
}
keys := []string{}
continuation := ""
keyPrefix := ""
for {
var err error
var inp *sthree.ListObjectsV2Input
if len(s.options.Bucket) > 0 {
k := filepath.Join(options.Namespace, options.Prefix)
keyPrefix = options.Namespace
inp = &sthree.ListObjectsV2Input{
Bucket: &s.options.Bucket, // bucket name
Prefix: &k, // prefix
}
} else {
inp = &sthree.ListObjectsV2Input{
Bucket: &options.Namespace, // bucket name
Prefix: &options.Prefix, // object name
}
}
inp.SetContinuationToken(continuation)
res, err := s.client.ListObjectsV2(inp)
if err != nil {
return nil, err
}
for _, obj := range res.Contents {
// return the key without the prefix
key := *obj.Key
if len(keyPrefix) > 0 {
key = key[len(keyPrefix)+1:]
}
keys = append(keys, key)
}
if !*res.IsTruncated {
break
}
continuation = *res.ContinuationToken
}
// return the result
return keys, nil
}