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cloudreve/service/explorer/slave.go

192 lines
5.7 KiB

package explorer
import (
"context"
"encoding/base64"
"encoding/json"
"fmt"
model "github.com/cloudreve/Cloudreve/v3/models"
"github.com/cloudreve/Cloudreve/v3/pkg/cache"
"github.com/cloudreve/Cloudreve/v3/pkg/cluster"
"github.com/cloudreve/Cloudreve/v3/pkg/filesystem"
"github.com/cloudreve/Cloudreve/v3/pkg/filesystem/fsctx"
"github.com/cloudreve/Cloudreve/v3/pkg/serializer"
"github.com/cloudreve/Cloudreve/v3/pkg/task"
"github.com/cloudreve/Cloudreve/v3/pkg/task/slavetask"
"github.com/cloudreve/Cloudreve/v3/pkg/util"
"github.com/gin-gonic/gin"
"github.com/jinzhu/gorm"
"net/http"
"net/url"
"time"
)
// SlaveDownloadService 从机文件下載服务
type SlaveDownloadService struct {
PathEncoded string `uri:"path" binding:"required"`
Name string `uri:"name" binding:"required"`
Speed int `uri:"speed" binding:"min=0"`
}
// SlaveFileService 从机单文件文件相关服务
type SlaveFileService struct {
PathEncoded string `uri:"path" binding:"required"`
}
// SlaveFilesService 从机多文件相关服务
type SlaveFilesService struct {
Files []string `json:"files" binding:"required,gt=0"`
}
// SlaveListService 从机列表服务
type SlaveListService struct {
Path string `json:"path" binding:"required,min=1,max=65535"`
Recursive bool `json:"recursive"`
}
// ServeFile 通过签名的URL下载从机文件
func (service *SlaveDownloadService) ServeFile(ctx context.Context, c *gin.Context, isDownload bool) serializer.Response {
// 创建文件系统
fs, err := filesystem.NewAnonymousFileSystem()
if err != nil {
return serializer.Err(serializer.CodePolicyNotAllowed, err.Error(), err)
}
defer fs.Recycle()
// 解码文件路径
fileSource, err := base64.RawURLEncoding.DecodeString(service.PathEncoded)
if err != nil {
return serializer.ParamErr("无法解析的文件地址", err)
}
// 根据URL里的信息创建一个文件对象和用户对象
file := model.File{
Name: service.Name,
SourceName: string(fileSource),
Policy: model.Policy{
Model: gorm.Model{ID: 1},
Type: "local",
},
}
fs.User = &model.User{
Group: model.Group{SpeedLimit: service.Speed},
}
fs.FileTarget = []model.File{file}
// 开始处理下载
ctx = context.WithValue(ctx, fsctx.GinCtx, c)
rs, err := fs.GetDownloadContent(ctx, 0)
if err != nil {
return serializer.Err(serializer.CodeNotSet, err.Error(), err)
}
defer rs.Close()
// 设置下载文件名
if isDownload {
c.Header("Content-Disposition", "attachment; filename=\""+url.PathEscape(fs.FileTarget[0].Name)+"\"")
}
// 发送文件
http.ServeContent(c.Writer, c.Request, fs.FileTarget[0].Name, time.Now(), rs)
return serializer.Response{}
}
// Delete 通过签名的URL删除从机文件
func (service *SlaveFilesService) Delete(ctx context.Context, c *gin.Context) serializer.Response {
// 创建文件系统
fs, err := filesystem.NewAnonymousFileSystem()
if err != nil {
return serializer.Err(serializer.CodePolicyNotAllowed, err.Error(), err)
}
defer fs.Recycle()
// 删除文件
failed, err := fs.Handler.Delete(ctx, service.Files)
if err != nil {
// 将Data字段写为字符串方便主控端解析
data, _ := json.Marshal(serializer.RemoteDeleteRequest{Files: failed})
return serializer.Response{
Code: serializer.CodeNotFullySuccess,
Data: string(data),
Msg: fmt.Sprintf("有 %d 个文件未能成功删除", len(failed)),
Error: err.Error(),
}
}
return serializer.Response{}
}
// Thumb 通过签名URL获取从机文件缩略图
func (service *SlaveFileService) Thumb(ctx context.Context, c *gin.Context) serializer.Response {
// 创建文件系统
fs, err := filesystem.NewAnonymousFileSystem()
if err != nil {
return serializer.Err(serializer.CodePolicyNotAllowed, err.Error(), err)
}
defer fs.Recycle()
// 解码文件路径
fileSource, err := base64.RawURLEncoding.DecodeString(service.PathEncoded)
if err != nil {
return serializer.ParamErr("无法解析的文件地址", err)
}
fs.FileTarget = []model.File{{SourceName: string(fileSource), PicInfo: "1,1"}}
// 获取缩略图
resp, err := fs.GetThumb(ctx, 0)
if err != nil {
return serializer.Err(serializer.CodeNotSet, "无法获取缩略图", err)
}
defer resp.Content.Close()
http.ServeContent(c.Writer, c.Request, "thumb.png", time.Now(), resp.Content)
return serializer.Response{}
}
// CreateTransferTask 创建从机文件转存任务
func CreateTransferTask(c *gin.Context, req *serializer.SlaveTransferReq) serializer.Response {
if id, ok := c.Get("MasterSiteID"); ok {
job := &slavetask.TransferTask{
Req: req,
MasterID: id.(string),
}
if err := cluster.DefaultController.SubmitTask(job.MasterID, job, req.Hash(job.MasterID), func(job interface{}) {
task.TaskPoll.Submit(job.(task.Job))
}); err != nil {
return serializer.Err(serializer.CodeInternalSetting, "任务创建失败", err)
}
return serializer.Response{}
}
return serializer.ParamErr("未知的主机节点ID", nil)
}
// SlaveListService 从机上传会话服务
type SlaveCreateUploadSessionService struct {
Session serializer.UploadSession `json:"session" binding:"required"`
TTL int64 `json:"ttl"`
Overwrite bool `json:"overwrite"`
}
// Create 从机创建上传会话
func (service *SlaveCreateUploadSessionService) Create(ctx context.Context, c *gin.Context) serializer.Response {
if !service.Overwrite && util.Exists(service.Session.SavePath) {
return serializer.Err(serializer.CodeConflict, "placeholder file already exist", nil)
}
err := cache.Set(
filesystem.UploadSessionCachePrefix+service.Session.Key,
service.Session,
int(service.TTL),
)
if err != nil {
return serializer.Err(serializer.CodeCacheOperation, "Failed to create upload session in slave node", err)
}
return serializer.Response{}
}