/
oss.go
200 lines (188 loc) · 4.67 KB
/
oss.go
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package storage
import (
"context"
"encoding/json"
"io"
"net/http"
"path/filepath"
"github.com/aliyun/aliyun-oss-go-sdk/oss"
"github.com/nilorg/sdk/convert"
"github.com/nilorg/sdk/mime"
"github.com/nilorg/sdk/storage"
)
var _ storage.Storager = (*AliyunOssStorage)(nil)
// AliyunOssStorage 阿里云oss存储
type AliyunOssStorage struct {
bucketNames []string
ossClient *oss.Client
CheckAndCreateBucketEnabled bool
}
// NewAliyunOssStorage 创建阿里云oss存储
func NewAliyunOssStorage(ossClient *oss.Client, initBucket bool, bucketNames []string) (os *AliyunOssStorage, err error) {
os = &AliyunOssStorage{
bucketNames: bucketNames,
ossClient: ossClient,
CheckAndCreateBucketEnabled: false,
}
if initBucket {
err = os.initBucket()
if err != nil {
os = nil
}
}
return
}
// initBucket 初始化桶
func (ds *AliyunOssStorage) initBucket() (err error) {
for _, bucketName := range ds.bucketNames {
err = ds.CheckAndCreateBucket(bucketName)
if err != nil {
return
}
}
return
}
// CheckAndCreateBucket 检查并创建桶
func (ds *AliyunOssStorage) CheckAndCreateBucket(bucketName string) (err error) {
var exists bool
// 检查存储桶是否已经存在。
exists, err = ds.ossClient.IsBucketExist(bucketName)
if err != nil {
return
}
if exists {
return
}
// 创建桶
err = ds.ossClient.CreateBucket(bucketName)
return
}
// Upload 上传
func (ds *AliyunOssStorage) Upload(ctx context.Context, read io.Reader, filename string) (fullName string, err error) {
bucketName, bucketNameOk := FromBucketNameContext(ctx)
if !bucketNameOk {
err = ErrBucketNameNotIsNil
return
}
if ds.CheckAndCreateBucketEnabled {
err = ds.CheckAndCreateBucket(bucketName)
if err != nil {
return
}
}
if rename, ok := storage.FromRenameContext(ctx); ok {
filename = rename(filename)
}
fullName = filename
options := []oss.Option{}
contentType, contentTypeExist := FromContentTypeContext(ctx)
if contentTypeExist {
options = append(options, oss.ContentType(contentType))
} else {
var detectContentType string
detectContentType, err = mime.DetectContentType(filename)
if err != nil {
return
}
options = append(options, oss.ContentType(detectContentType))
}
md, mdExist := storage.FromIncomingContext(ctx)
if mdExist {
var mdBytes []byte
mdBytes, err = json.Marshal(md)
if err != nil {
return
}
options = append(options, oss.Meta("Data", string(mdBytes)))
}
var bucket *oss.Bucket
bucket, err = ds.ossClient.Bucket(bucketName)
if err != nil {
return
}
err = bucket.PutObject(filename, read, options...)
return
}
// Download 下载
func (ds *AliyunOssStorage) Download(ctx context.Context, dist io.Writer, filename string) (info storage.DownloadFileInfoer, err error) {
bucketName, bucketNameOk := FromBucketNameContext(ctx)
if !bucketNameOk {
err = ErrBucketNameNotIsNil
return
}
var bucket *oss.Bucket
bucket, err = ds.ossClient.Bucket(bucketName)
if err != nil {
return
}
var object io.ReadCloser
object, err = bucket.GetObject(filename)
if err != nil {
return
}
defer object.Close()
var meta http.Header
meta, err = bucket.GetObjectMeta(filename)
if err != nil {
return
}
md := storage.Metadata{}
for k, v := range meta {
md.Set(k, v[0])
}
var (
downloadFilename string
downloadFilenameExist bool
)
if downloadFilename, downloadFilenameExist = storage.FromDownloadFilenameContext(ctx); !downloadFilenameExist {
downloadFilename = filepath.Base(filename)
}
var size int64
if length := md.Get(oss.HTTPHeaderContentLength); length != "" {
size = convert.ToInt64(length)
}
info = &downloadFileInfo{
filename: downloadFilename,
size: size,
metadata: md,
}
if downloadBefore, downloadBeforeExist := storage.FromDownloadBeforeContext(ctx); downloadBeforeExist {
downloadBefore(info)
}
_, err = io.Copy(dist, object)
if err != nil {
info = nil
return
}
return
}
// Remove 删除
func (ds *AliyunOssStorage) Remove(ctx context.Context, filename string) (err error) {
bucketName, bucketNameOk := FromBucketNameContext(ctx)
if !bucketNameOk {
err = ErrBucketNameNotIsNil
return
}
var bucket *oss.Bucket
bucket, err = ds.ossClient.Bucket(bucketName)
if err != nil {
return
}
err = bucket.DeleteObject(bucketName)
return
}
// Exist 判断文件是否存在
func (ds *AliyunOssStorage) Exist(ctx context.Context, filename string) (exist bool, err error) {
bucketName, bucketNameOk := FromBucketNameContext(ctx)
if !bucketNameOk {
err = ErrBucketNameNotIsNil
return
}
var bucket *oss.Bucket
bucket, err = ds.ossClient.Bucket(bucketName)
if err != nil {
return
}
exist, err = bucket.IsObjectExist(filename)
return
}