jyfs/rpc/internal/logic/savefilelogic.go

package logic

import (
	"app.yhyue.com/moapp/jyfs/rpc/internal/config"
	"compress/gzip"
	"context"
	"errors"
	"fmt"
	"io/ioutil"
	"strings"

	"bytes"

	"app.yhyue.com/moapp/jyfs/rpc/filesystem"
	"app.yhyue.com/moapp/jyfs/rpc/internal/redis"
	"app.yhyue.com/moapp/jyfs/rpc/internal/svc"

	// "app.yhyue.com/moapp/jyfs/rpc/internal/redis"
	"github.com/aliyun/aliyun-oss-go-sdk/oss"
	"github.com/zeromicro/go-zero/core/logx"
)

type SaveFileLogic struct {
	ctx    context.Context
	svcCtx *svc.ServiceContext
	logx.Logger
}

func NewSaveFileLogic(ctx context.Context, svcCtx *svc.ServiceContext) *SaveFileLogic {
	return &SaveFileLogic{
		ctx:    ctx,
		svcCtx: svcCtx,
		Logger: logx.WithContext(ctx),
	}
}

// 保存文件
func (l *SaveFileLogic) SaveFile(in *filesystem.SaveFileReq) (*filesystem.FileOpResp, error) {
	// 获取存储空间。
	bucket, err := l.svcCtx.OssClient.Bucket(in.Domain)
	if err != nil {
		return &filesystem.FileOpResp{State: false}, err
	}
	meta := redis.GetStr("jyfs", "jyfs_"+in.Domain)
	if meta != "" {
		for k, _ := range in.Meta {
			if !strings.Contains(meta, k) {
				return &filesystem.FileOpResp{}, errors.New("缺少元信息")
			}
		}
	}
	if len(in.RawFileContent) > 0 {
		content, _ := decompress(in.RawFileContent)
		if len(content) > 0 {
			in.RawFileContent = content
		}
	}
	// 设置文件元信息：过期时间为2049年1月10日 23:00:00 GMT，访问权限为公共读，自定义元信息为MyProp（取值MyPropVal）。
	// expires := time.Date(2049, time.January, 10, 23, 0, 0, 0, time.UTC)
	options := []oss.Option{
		// oss.Expires(expires),
		// oss.ObjectACL(oss.ACLPublicRead),
		// oss.Meta("MyProp", "MyPropVal"),
	}
	if in.Source == "docin" {
		if fs := strings.Split(in.FileId, "."); len(fs) > 1 {
			suffix := strings.ToLower(fs[1])
			if charset := config.Cf.ContentType[suffix]; charset != "" {
				options = append(options, oss.ContentType(fmt.Sprintf("text/plain; charset=%s", charset)))
			}
		}
	}
	for k, v := range in.Meta {
		options = append(options, oss.Meta(k, v))
	}
	// 上传Byte数组。
	err = bucket.PutObject(in.FileId, bytes.NewReader(in.RawFileContent), options...)
	if err != nil {
		return &filesystem.FileOpResp{}, err
	}
	return &filesystem.FileOpResp{State: true, FileId: in.FileId}, nil
}

func decompress(data []byte) ([]byte, error) {
	r, err := gzip.NewReader(bytes.NewBuffer(data))
	if err != nil {
		return nil, err
	}
	defer r.Close()
	return ioutil.ReadAll(r)
}