package filesystem import ( "context" "io" "os" "path" model "github.com/cloudreve/Cloudreve/v3/models" "github.com/cloudreve/Cloudreve/v3/pkg/cache" "github.com/cloudreve/Cloudreve/v3/pkg/filesystem/driver/local" "github.com/cloudreve/Cloudreve/v3/pkg/filesystem/fsctx" "github.com/cloudreve/Cloudreve/v3/pkg/request" "github.com/cloudreve/Cloudreve/v3/pkg/serializer" "github.com/cloudreve/Cloudreve/v3/pkg/util" "github.com/gin-gonic/gin" ) /* ================ 上传处理相关 ================ */ // Upload 上传文件 func (fs *FileSystem) Upload(ctx context.Context, file FileHeader) (err error) { ctx = context.WithValue(ctx, fsctx.FileHeaderCtx, file) // 上传前的钩子 err = fs.Trigger(ctx, "BeforeUpload") if err != nil { request.BlackHole(file) return err } // 生成文件名和路径, var savePath string // 如果是更新操作就从上下文中获取 if originFile, ok := ctx.Value(fsctx.FileModelCtx).(model.File); ok { savePath = originFile.SourceName } else { savePath = fs.GenerateSavePath(ctx, file) } ctx = context.WithValue(ctx, fsctx.SavePathCtx, savePath) // 处理客户端未完成上传时,关闭连接 go fs.CancelUpload(ctx, savePath, file) // 保存文件 err = fs.Handler.Put(ctx, file, savePath, file.GetSize()) if err != nil { fs.Trigger(ctx, "AfterUploadFailed") return err } // 上传完成后的钩子 err = fs.Trigger(ctx, "AfterUpload") if err != nil { // 上传完成后续处理失败 followUpErr := fs.Trigger(ctx, "AfterValidateFailed") // 失败后再失败... if followUpErr != nil { util.Log().Debug("AfterValidateFailed 钩子执行失败,%s", followUpErr) } return err } util.Log().Info( "新文件PUT:%s , 大小:%d, 上传者:%s", file.GetFileName(), file.GetSize(), fs.User.Nick, ) return nil } // GenerateSavePath 生成要存放文件的路径 // TODO 完善测试 func (fs *FileSystem) GenerateSavePath(ctx context.Context, file FileHeader) string { if fs.User.Model.ID != 0 { return path.Join( fs.User.Policy.GeneratePath( fs.User.Model.ID, file.GetVirtualPath(), ), fs.User.Policy.GenerateFileName( fs.User.Model.ID, file.GetFileName(), ), ) } // 匿名文件系统尝试根据上下文中的上传策略生成路径 var anonymousPolicy model.Policy if policy, ok := ctx.Value(fsctx.UploadPolicyCtx).(serializer.UploadPolicy); ok { anonymousPolicy = model.Policy{ Type: "remote", AutoRename: policy.AutoRename, DirNameRule: policy.SavePath, FileNameRule: policy.FileName, } } return path.Join( anonymousPolicy.GeneratePath( 0, "", ), anonymousPolicy.GenerateFileName( 0, file.GetFileName(), ), ) } // CancelUpload 监测客户端取消上传 func (fs *FileSystem) CancelUpload(ctx context.Context, path string, file FileHeader) { var reqContext context.Context if ginCtx, ok := ctx.Value(fsctx.GinCtx).(*gin.Context); ok { reqContext = ginCtx.Request.Context() } else if reqCtx, ok := ctx.Value(fsctx.HTTPCtx).(context.Context); ok { reqContext = reqCtx } else { return } select { case <-reqContext.Done(): select { case <-ctx.Done(): // 客户端正常关闭,不执行操作 default: // 客户端取消上传,删除临时文件 util.Log().Debug("客户端取消上传") if fs.Hooks["AfterUploadCanceled"] == nil { return } ctx = context.WithValue(ctx, fsctx.SavePathCtx, path) err := fs.Trigger(ctx, "AfterUploadCanceled") if err != nil { util.Log().Debug("执行 AfterUploadCanceled 钩子出错,%s", err) } } } } // GetUploadToken 生成新的上传凭证 func (fs *FileSystem) GetUploadToken(ctx context.Context, path string, size uint64, name string) (*serializer.UploadCredential, error) { // 获取相关有效期设置 credentialTTL := model.GetIntSetting("upload_credential_timeout", 3600) callBackSessionTTL := model.GetIntSetting("upload_session_timeout", 86400) var err error // 检查文件大小 if fs.User.Policy.MaxSize != 0 { if size > fs.User.Policy.MaxSize { return nil, ErrFileSizeTooBig } } // 是否需要预先生成存储路径 var savePath string if fs.User.Policy.IsPathGenerateNeeded() { savePath = fs.GenerateSavePath(ctx, local.FileStream{Name: name, VirtualPath: path}) ctx = context.WithValue(ctx, fsctx.SavePathCtx, savePath) } ctx = context.WithValue(ctx, fsctx.FileSizeCtx, size) // 获取上传凭证 callbackKey := util.RandStringRunes(32) credential, err := fs.Handler.Token(ctx, int64(credentialTTL), callbackKey) if err != nil { return nil, serializer.NewError(serializer.CodeEncryptError, "无法获取上传凭证", err) } // 创建回调会话 err = cache.Set( "callback_"+callbackKey, serializer.UploadSession{ Key: callbackKey, UID: fs.User.ID, PolicyID: fs.User.GetPolicyID(0), VirtualPath: path, Name: name, Size: size, SavePath: savePath, }, callBackSessionTTL, ) if err != nil { return nil, err } return &credential, nil } // UploadFromStream 从文件流上传文件 func (fs *FileSystem) UploadFromStream(ctx context.Context, src io.ReadCloser, dst string, size uint64) error { // 构建文件头 fileName := path.Base(dst) filePath := path.Dir(dst) fileData := local.FileStream{ File: src, Size: size, Name: fileName, VirtualPath: filePath, } // 给文件系统分配钩子 fs.Lock.Lock() if fs.Hooks == nil { fs.Use("BeforeUpload", HookValidateFile) fs.Use("BeforeUpload", HookValidateCapacity) fs.Use("AfterUploadCanceled", HookDeleteTempFile) fs.Use("AfterUploadCanceled", HookGiveBackCapacity) fs.Use("AfterUpload", GenericAfterUpload) fs.Use("AfterValidateFailed", HookDeleteTempFile) fs.Use("AfterValidateFailed", HookGiveBackCapacity) fs.Use("AfterUploadFailed", HookGiveBackCapacity) } fs.Lock.Unlock() // 开始上传 return fs.Upload(ctx, fileData) } // UploadFromPath 将本机已有文件上传到用户的文件系统 func (fs *FileSystem) UploadFromPath(ctx context.Context, src, dst string, resetPolicy bool) error { // 重设存储策略 if resetPolicy { fs.Policy = &fs.User.Policy err := fs.DispatchHandler() if err != nil { return err } } file, err := os.Open(util.RelativePath(src)) if err != nil { return err } defer file.Close() // 获取源文件大小 fi, err := file.Stat() if err != nil { return err } size := fi.Size() // 开始上传 return fs.UploadFromStream(ctx, file, dst, uint64(size)) }