package controller import ( "errors" "git.lumeweb.com/LumeWeb/portal/cid" "git.lumeweb.com/LumeWeb/portal/controller/response" "git.lumeweb.com/LumeWeb/portal/logger" "git.lumeweb.com/LumeWeb/portal/middleware" "git.lumeweb.com/LumeWeb/portal/service/files" "github.com/kataras/iris/v12" "go.uber.org/zap" "io" ) var errStreamDone = errors.New("done") type FilesController struct { Controller } func (f *FilesController) BeginRequest(ctx iris.Context) { middleware.VerifyJwt(ctx) } func (f *FilesController) EndRequest(ctx iris.Context) { } func (f *FilesController) PostUpload() { ctx := f.Ctx file, meta, err := f.Ctx.FormFile("file") if internalErrorCustom(ctx, err, errors.New("invalid file data")) { logger.Get().Debug("invalid file data", zap.Error(err)) return } upload, err := files.Upload(file, meta.Size, nil) if internalError(ctx, err) { logger.Get().Debug("failed uploading file", zap.Error(err)) return } err = files.Pin(upload.Hash, upload.AccountID) if internalError(ctx, err) { logger.Get().Debug("failed pinning file", zap.Error(err)) return } cidString, err := cid.EncodeString(upload.Hash, uint64(meta.Size)) if internalError(ctx, err) { logger.Get().Debug("failed creating cid", zap.Error(err)) return } err = ctx.JSON(&response.UploadResponse{Cid: cidString}) if err != nil { logger.Get().Error("failed to create response", zap.Error(err)) } } func (f *FilesController) GetDownloadBy(cidString string) { ctx := f.Ctx hashHex, valid := validateCid(cidString, true, ctx) if !valid { return } download, err := files.Download(hashHex) if internalError(ctx, err) { logger.Get().Debug("failed fetching file", zap.Error(err)) return } err = passThroughStream(download, ctx) if err != errStreamDone && internalError(ctx, err) { logger.Get().Debug("failed streaming file", zap.Error(err)) } } func (f *FilesController) GetProofBy(cidString string) { ctx := f.Ctx hashHex, valid := validateCid(cidString, true, ctx) if !valid { return } proof, err := files.DownloadProof(hashHex) if internalError(ctx, err) { logger.Get().Debug("failed fetching file proof", zap.Error(err)) return } err = passThroughStream(proof, ctx) if internalError(ctx, err) { logger.Get().Debug("failed streaming file proof", zap.Error(err)) } } func (f *FilesController) GetStatusBy(cidString string) { ctx := f.Ctx hashHex, valid := validateCid(cidString, false, ctx) if !valid { return } status := files.Status(hashHex) var statusCode string switch status { case files.STATUS_UPLOADED: statusCode = "uploaded" break case files.STATUS_UPLOADING: statusCode = "uploading" break case files.STATUS_NOT_FOUND: statusCode = "not_found" break } f.respondJSON(&response.FileStatusResponse{Status: statusCode}) } func (f *FilesController) PostPinBy(cidString string) { ctx := f.Ctx hashHex, valid := validateCid(cidString, true, ctx) if !valid { return } err := files.Pin(hashHex, auth.GetCurrentUserId(ctx)) if internalError(ctx, err) { logger.Get().Error(err.Error()) return } f.Ctx.StatusCode(iris.StatusCreated) } func (f *FilesController) GetUploadLimit() { f.respondJSON(&response.UploadLimit{Limit: f.Ctx.Application().ConfigurationReadOnly().GetPostMaxMemory()}) } func validateCid(cidString string, validateStatus bool, ctx iris.Context) (string, bool) { _, err := cid.Valid(cidString) if sendError(ctx, err, iris.StatusBadRequest) { logger.Get().Debug("invalid cid", zap.Error(err)) return "", false } cidObject, _ := cid.Decode(cidString) hashHex := cidObject.StringHash() if validateStatus { status := files.Status(hashHex) if status == files.STATUS_NOT_FOUND { err := errors.New("cid not found") sendError(ctx, errors.New("cid not found"), iris.StatusNotFound) logger.Get().Debug("cid not found", zap.Error(err)) return "", false } } return hashHex, true } func passThroughStream(stream io.Reader, ctx iris.Context) error { closed := false err := ctx.StreamWriter(func(w io.Writer) error { if closed { return errStreamDone } count, err := io.CopyN(w, stream, 1024) if count == 0 || err == io.EOF { err = stream.(io.Closer).Close() if err != nil { logger.Get().Error("failed closing stream", zap.Error(err)) return err } closed = true return nil } if err != nil { return err } return nil }) if err == errStreamDone { err = nil } return err }