/
s3.go
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/
s3.go
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package s3
import (
"errors"
"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/request"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/s3"
"github.com/burybell/oss"
"io"
"mime"
"net/http"
"os"
"path/filepath"
"strings"
"time"
)
const (
Name = "s3"
)
type Config struct {
Region string `yaml:"region" mapstructure:"region" json:"region"`
KeyID string `yaml:"key_id" mapstructure:"key_id" json:"key_id"`
Secret string `yaml:"secret" mapstructure:"secret" json:"secret"`
}
type objectstore struct {
config Config
client *s3.S3
}
func NewObjectStore(config Config) (oss.ObjectStore, error) {
provider, err := session.NewSession(aws.NewConfig().WithRegion(config.Region).WithCredentials(credentials.NewStaticCredentials(config.KeyID, config.Secret, "")))
if err != nil {
return nil, err
}
return &objectstore{config: config, client: s3.New(provider)}, nil
}
func MustNewObjectStore(config Config) oss.ObjectStore {
store, err := NewObjectStore(config)
if err != nil {
panic(err)
}
return store
}
func (t *objectstore) Name() string {
return Name
}
func (t *objectstore) Bucket(name string) oss.Bucket {
return &bucket{
config: t.config,
client: t.client,
bucket: name,
}
}
func (t *objectstore) ACLEnum() oss.ACLEnum {
return aclEnum{}
}
type bucket struct {
config Config
client *s3.S3
bucket string
}
func (t *bucket) GetObject(path string) (oss.Object, error) {
acl, err := t.client.GetObjectAcl(&s3.GetObjectAclInput{Bucket: &t.bucket, Key: &path})
if err != nil {
if err.(awserr.Error).Code() == "NoSuchKey" {
return nil, oss.ObjectNotFound
}
return nil, err
}
var publicACL = make(map[string]int)
for _, grant := range acl.Grants {
publicACL[*grant.Permission] = 1
}
var ACL = ""
if publicACL["FULL_CONTROL"] == 1 || (publicACL["READ"] == 1 && publicACL["WRITE"] == 1) {
ACL = "public-read-write"
} else if publicACL["READ"] == 1 {
ACL = "public-read"
} else {
ACL = "private"
}
resp, err := t.client.GetObject(&s3.GetObjectInput{Bucket: &t.bucket, Key: &path})
if err != nil {
return nil, err
}
return oss.NewObject(t.bucket, path, ACL, resp.Body), nil
}
func (t *bucket) PutObject(path string, reader io.Reader) error {
return t.PutObjectWithACL(path, reader, aclEnum{}.Default())
}
func (t *bucket) PutObjectWithACL(path string, reader io.Reader, acl oss.ACL) error {
temp, err := os.CreateTemp("", "temp")
if err != nil {
return err
}
_, _ = io.Copy(temp, reader)
_ = temp.Close()
f, err := os.Open(temp.Name())
if err != nil {
return err
}
defer func() {
_ = f.Close()
_ = os.Remove(temp.Name())
}()
_, err = t.client.PutObject(&s3.PutObjectInput{
Bucket: &t.bucket,
Key: &path,
Body: f,
ContentType: aws.String(mime.TypeByExtension(filepath.Ext(path))),
ACL: aws.String(acl),
})
return err
}
func (t *bucket) HeadObject(path string) (bool, error) {
_, err := t.client.HeadObject(&s3.HeadObjectInput{Bucket: &t.bucket, Key: &path})
if err != nil {
if err.(awserr.Error).Code() == "NotFound" {
return false, nil
}
return false, err
}
return true, nil
}
func (t *bucket) DeleteObject(path string) error {
_, err := t.client.DeleteObject(&s3.DeleteObjectInput{Bucket: &t.bucket, Key: &path})
return err
}
func (t *bucket) ListObject(prefix string) ([]oss.ObjectMeta, error) {
var oms = make([]oss.ObjectMeta, 0)
var marker = ""
for {
objects, err := t.client.ListObjects(&s3.ListObjectsInput{
Bucket: aws.String(t.bucket),
Prefix: aws.String(prefix),
Marker: aws.String(marker),
MaxKeys: aws.Int64(200),
})
if err != nil {
return oms, err
}
for _, key := range objects.Contents {
if key.Key != nil {
if strings.HasSuffix(*key.Key, "/") {
continue
}
oms = append(oms, oss.NewObjectMeta(t.bucket, *key.Key))
}
}
if objects.IsTruncated != nil && !*objects.IsTruncated {
return oms, nil
} else {
if objects.NextMarker != nil {
marker = *objects.NextMarker
} else {
return oms, nil
}
}
}
}
func (t *bucket) GetObjectSize(path string) (oss.Size, error) {
resp, err := t.client.HeadObject(&s3.HeadObjectInput{Bucket: &t.bucket, Key: &path})
if err != nil {
if err.(awserr.Error).Code() == "NotFound" {
return nil, oss.ObjectNotFound
}
return nil, err
}
return oss.NewSize(*resp.ContentLength), nil
}
func (t *bucket) SignURL(path string, method string, expiredInDur time.Duration) (string, error) {
var req *request.Request
switch method {
case http.MethodGet:
req, _ = t.client.GetObjectRequest(&s3.GetObjectInput{
Bucket: aws.String(t.bucket),
Key: aws.String(path),
})
return req.Presign(expiredInDur)
case http.MethodPut:
req, _ = t.client.PutObjectRequest(&s3.PutObjectInput{
Bucket: aws.String(t.bucket),
Key: aws.String(path),
})
return req.Presign(expiredInDur)
case http.MethodDelete:
req, _ = t.client.DeleteObjectRequest(&s3.DeleteObjectInput{
Bucket: aws.String(t.bucket),
Key: aws.String(path),
})
return req.Presign(expiredInDur)
case http.MethodHead:
req, _ = t.client.HeadObjectRequest(&s3.HeadObjectInput{
Bucket: aws.String(t.bucket),
Key: aws.String(path),
})
return req.Presign(expiredInDur)
default:
return "", errors.New("not support")
}
}
type aclEnum struct {
}
func (t aclEnum) Private() oss.ACL {
return "private"
}
func (t aclEnum) PublicRead() oss.ACL {
return "public-read"
}
func (t aclEnum) PublicReadWrite() oss.ACL {
return "public-read-write"
}
func (t aclEnum) Default() oss.ACL {
return ""
}