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oss.go
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oss.go
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package storage
import (
"context"
"io"
"net/url"
"strings"
"github.com/aliyun/aliyun-oss-go-sdk/oss"
"github.com/pkg/errors"
"github.com/xgxw/foundation-go"
)
// OSSOptions is Oss 存储所需的配置项
type OSSOptions struct {
Endpoint string `yaml:"endpoint" mapstructure:"endpoint"`
AccessKeyID string `yaml:"access_key_id" mapstructure:"access_key_id"`
AccessKeySecret string `yaml:"access_key_secret" mapstructure:"access_key_secret"`
Bucket string `yaml:"bucket" mapstructure:"bucket"`
UseHTTPS bool `yaml:"use_https" mapstructure:"use_https"`
Domain string `yaml:"domain" mapstructure:"domain"`
}
// OSSBucketInterface 是为了脱离bucket带来的影响.
// 如mock时, 如果使用 oss.Client 则无法mock(Client is struct)
type OSSBucketInterface interface {
PutObject(objectKey string, reader io.Reader, options ...oss.Option) error
GetObject(objectKey string, options ...oss.Option) (io.ReadCloser, error)
DeleteObject(objectKey string, options ...oss.Option) error
}
// OSSStorage oss 客户端
type OSSStorage struct {
name string
bucket OSSBucketInterface
accessURL *url.URL
}
var _ foundation.Storage = &OSSStorage{}
// NewOssClient is 创建oss客户端
func NewOssClient(opts *OSSOptions) (*OSSStorage, error) {
ossClient, err := oss.New(opts.Endpoint, opts.AccessKeyID, opts.AccessKeySecret)
if err != nil {
return &OSSStorage{}, errors.Wrap(err, "create oss client error")
}
bucket, err := ossClient.Bucket(opts.Bucket)
if err != nil {
return &OSSStorage{}, errors.Wrap(err, "conn oss bucket error")
}
var buf strings.Builder
buf.WriteString("oss:")
buf.WriteString(opts.Endpoint)
buf.WriteString(":")
buf.WriteString(opts.Bucket)
accessURL := initAccessURL(opts)
return &OSSStorage{
name: buf.String(),
bucket: bucket,
accessURL: accessURL,
}, nil
}
func initAccessURL(opts *OSSOptions) *url.URL {
// scheme
var scheme = "http"
if opts.UseHTTPS {
scheme = "https"
}
// domain
var domainBuf strings.Builder
if len(opts.Domain) > 0 {
domainBuf.WriteString(opts.Domain)
} else {
domainBuf.WriteString(opts.Bucket)
domainBuf.WriteString(".")
domainBuf.WriteString(opts.Endpoint)
}
return &url.URL{
Scheme: scheme,
Host: domainBuf.String(),
}
}
func (s *OSSStorage) Name() string {
return s.name
}
func (s *OSSStorage) Save(ctx context.Context, fileID string, reader io.Reader) error {
return s.bucket.PutObject(fileID, reader)
}
// Writer 可以直接将数据写入传入的结构体. 如传入 bytes.Buffer, 数据直接可写入buffer.
func (s *OSSStorage) Fetch(ctx context.Context, fileID string, writer io.Writer) error {
reader, err := s.bucket.GetObject(fileID)
if err != nil {
return err
}
_, err = io.Copy(writer, reader)
return err
}
func (s *OSSStorage) Del(ctx context.Context, fileID string) error {
return s.bucket.DeleteObject(fileID)
}
func (s *OSSStorage) URL(ctx context.Context, fileID string) (*url.URL, error) {
var accessURL = &url.URL{
Scheme: s.accessURL.Scheme,
Host: s.accessURL.Host,
Path: fileID,
}
return accessURL, nil
}