package explorer import ( "context" "fmt" model "github.com/cloudreve/Cloudreve/v3/models" "github.com/cloudreve/Cloudreve/v3/pkg/auth" "github.com/cloudreve/Cloudreve/v3/pkg/cache" "github.com/cloudreve/Cloudreve/v3/pkg/filesystem" "github.com/cloudreve/Cloudreve/v3/pkg/filesystem/driver/local" "github.com/cloudreve/Cloudreve/v3/pkg/filesystem/fsctx" "github.com/cloudreve/Cloudreve/v3/pkg/hashid" "github.com/cloudreve/Cloudreve/v3/pkg/serializer" "github.com/cloudreve/Cloudreve/v3/pkg/util" "github.com/gin-gonic/gin" "io/ioutil" "strconv" "strings" "time" ) // CreateUploadSessionService 获取上传凭证服务 type CreateUploadSessionService struct { Path string `json:"path" binding:"required"` Size uint64 `json:"size" binding:"min=0"` Name string `json:"name" binding:"required"` PolicyID string `json:"policy_id" binding:"required"` LastModified int64 `json:"last_modified"` } // Create 创建新的上传会话 func (service *CreateUploadSessionService) Create(ctx context.Context, c *gin.Context) serializer.Response { // 创建文件系统 fs, err := filesystem.NewFileSystemFromContext(c) if err != nil { return serializer.Err(serializer.CodeCreateFSError, "", err) } // 取得存储策略的ID rawID, err := hashid.DecodeHashID(service.PolicyID, hashid.PolicyID) if err != nil { return serializer.Err(serializer.CodePolicyNotExist, "", err) } if fs.Policy.ID != rawID { return serializer.Err(serializer.CodePolicyNotAllowed, "存储策略发生变化,请刷新文件列表并重新添加此任务", nil) } file := &fsctx.FileStream{ Size: service.Size, Name: service.Name, VirtualPath: service.Path, File: ioutil.NopCloser(strings.NewReader("")), } if service.LastModified > 0 { lastModified := time.UnixMilli(service.LastModified) file.LastModified = &lastModified } credential, err := fs.CreateUploadSession(ctx, file) if err != nil { return serializer.Err(serializer.CodeNotSet, err.Error(), err) } return serializer.Response{ Code: 0, Data: credential, } } // UploadService 本机及从机策略上传服务 type UploadService struct { ID string `uri:"sessionId" binding:"required"` Index int `uri:"index" form:"index" binding:"min=0"` } // LocalUpload 处理本机文件分片上传 func (service *UploadService) LocalUpload(ctx context.Context, c *gin.Context) serializer.Response { uploadSessionRaw, ok := cache.Get(filesystem.UploadSessionCachePrefix + service.ID) if !ok { return serializer.Err(serializer.CodeUploadSessionExpired, "", nil) } uploadSession := uploadSessionRaw.(serializer.UploadSession) fs, err := filesystem.NewFileSystemFromContext(c) if err != nil { return serializer.Err(serializer.CodePolicyNotAllowed, err.Error(), err) } if uploadSession.UID != fs.User.ID { return serializer.Err(serializer.CodeUploadSessionExpired, "", nil) } // 查找上传会话创建的占位文件 file, err := model.GetFilesByUploadSession(service.ID, fs.User.ID) if err != nil { return serializer.Err(serializer.CodeUploadSessionExpired, "", err) } // 重设 fs 存储策略 if !uploadSession.Policy.IsTransitUpload(uploadSession.Size) { return serializer.Err(serializer.CodePolicyNotAllowed, "", err) } fs.Policy = &uploadSession.Policy if err := fs.DispatchHandler(); err != nil { return serializer.Err(serializer.CodePolicyNotExist, "", err) } expectedSizeStart := file.Size actualSizeStart := uint64(service.Index) * uploadSession.Policy.OptionsSerialized.ChunkSize if uploadSession.Policy.OptionsSerialized.ChunkSize == 0 && service.Index > 0 { return serializer.Err(serializer.CodeInvalidChunkIndex, "Chunk index cannot be greater than 0", nil) } if expectedSizeStart < actualSizeStart { return serializer.Err(serializer.CodeInvalidChunkIndex, "Chunk must be uploaded in order", nil) } if expectedSizeStart > actualSizeStart { util.Log().Info("Trying to overwrite chunk[%d] Start=%d", service.Index, actualSizeStart) } return processChunkUpload(ctx, c, fs, &uploadSession, service.Index, file, fsctx.Append) } // SlaveUpload 处理从机文件分片上传 func (service *UploadService) SlaveUpload(ctx context.Context, c *gin.Context) serializer.Response { uploadSessionRaw, ok := cache.Get(filesystem.UploadSessionCachePrefix + service.ID) if !ok { return serializer.Err(serializer.CodeUploadSessionExpired, "", nil) } uploadSession := uploadSessionRaw.(serializer.UploadSession) fs, err := filesystem.NewAnonymousFileSystem() if err != nil { return serializer.Err(serializer.CodeCreateFSError, "", err) } fs.Handler = local.Driver{} // 解析需要的参数 service.Index, _ = strconv.Atoi(c.Query("chunk")) mode := fsctx.Append if c.GetHeader(auth.CrHeaderPrefix+"Overwrite") == "true" { mode |= fsctx.Overwrite } return processChunkUpload(ctx, c, fs, &uploadSession, service.Index, nil, mode) } func processChunkUpload(ctx context.Context, c *gin.Context, fs *filesystem.FileSystem, session *serializer.UploadSession, index int, file *model.File, mode fsctx.WriteMode) serializer.Response { // 取得并校验文件大小是否符合分片要求 chunkSize := session.Policy.OptionsSerialized.ChunkSize isLastChunk := session.Policy.OptionsSerialized.ChunkSize == 0 || uint64(index+1)*chunkSize >= session.Size expectedLength := chunkSize if isLastChunk { expectedLength = session.Size - uint64(index)*chunkSize } fileSize, err := strconv.ParseUint(c.Request.Header.Get("Content-Length"), 10, 64) if err != nil || (expectedLength != fileSize) { return serializer.Err( serializer.CodeInvalidContentLength, fmt.Sprintf("Invalid Content-Length (expected: %d)", expectedLength), err, ) } // 非首个分片时需要允许覆盖 if index > 0 { mode |= fsctx.Overwrite } fileData := fsctx.FileStream{ MIMEType: c.Request.Header.Get("Content-Type"), File: c.Request.Body, Size: fileSize, Name: session.Name, VirtualPath: session.VirtualPath, SavePath: session.SavePath, Mode: mode, AppendStart: chunkSize * uint64(index), Model: file, LastModified: session.LastModified, } // 给文件系统分配钩子 fs.Use("AfterUploadCanceled", filesystem.HookTruncateFileTo(fileData.AppendStart)) fs.Use("AfterValidateFailed", filesystem.HookTruncateFileTo(fileData.AppendStart)) if file != nil { fs.Use("BeforeUpload", filesystem.HookValidateCapacity) fs.Use("AfterUpload", filesystem.HookChunkUploaded) fs.Use("AfterValidateFailed", filesystem.HookChunkUploadFailed) if isLastChunk { fs.Use("AfterUpload", filesystem.HookPopPlaceholderToFile("")) fs.Use("AfterUpload", filesystem.HookDeleteUploadSession(session.Key)) } } else { if isLastChunk { fs.Use("AfterUpload", filesystem.SlaveAfterUpload(session)) fs.Use("AfterUpload", filesystem.HookDeleteUploadSession(session.Key)) } } // 执行上传 uploadCtx := context.WithValue(ctx, fsctx.GinCtx, c) err = fs.Upload(uploadCtx, &fileData) if err != nil { return serializer.Err(serializer.CodeUploadFailed, err.Error(), err) } return serializer.Response{} } // UploadSessionService 上传会话服务 type UploadSessionService struct { ID string `uri:"sessionId" binding:"required"` } // Delete 删除指定上传会话 func (service *UploadSessionService) Delete(ctx context.Context, c *gin.Context) serializer.Response { // 创建文件系统 fs, err := filesystem.NewFileSystemFromContext(c) if err != nil { return serializer.Err(serializer.CodeCreateFSError, "", err) } defer fs.Recycle() // 查找需要删除的上传会话的占位文件 file, err := model.GetFilesByUploadSession(service.ID, fs.User.ID) if err != nil { return serializer.Err(serializer.CodeUploadSessionExpired, "", err) } // 删除文件 if err := fs.Delete(ctx, []uint{}, []uint{file.ID}, false, false); err != nil { return serializer.Err(serializer.CodeInternalSetting, "Failed to delete upload session", err) } return serializer.Response{} } // SlaveDelete 从机删除指定上传会话 func (service *UploadSessionService) SlaveDelete(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.CodeCreateFSError, "", err) } defer fs.Recycle() session, ok := cache.Get(filesystem.UploadSessionCachePrefix + service.ID) if !ok { return serializer.Err(serializer.CodeUploadSessionExpired, "", nil) } if _, err := fs.Handler.Delete(ctx, []string{session.(serializer.UploadSession).SavePath}); err != nil { return serializer.Err(serializer.CodeInternalSetting, "Failed to delete temp file", err) } cache.Deletes([]string{service.ID}, filesystem.UploadSessionCachePrefix) return serializer.Response{} } // DeleteAllUploadSession 删除当前用户的全部上传绘会话 func DeleteAllUploadSession(ctx context.Context, c *gin.Context) serializer.Response { // 创建文件系统 fs, err := filesystem.NewFileSystemFromContext(c) if err != nil { return serializer.Err(serializer.CodeCreateFSError, "", err) } defer fs.Recycle() // 查找需要删除的上传会话的占位文件 files := model.GetUploadPlaceholderFiles(fs.User.ID) fileIDs := make([]uint, len(files)) for i, file := range files { fileIDs[i] = file.ID } // 删除文件 if err := fs.Delete(ctx, []uint{}, fileIDs, false, false); err != nil { return serializer.Err(serializer.CodeInternalSetting, "Failed to cleanup upload session", err) } return serializer.Response{} }