package database import ( "encoding/json" "fmt" "io" "net/http" "github.com/aerogo/aero" "github.com/aerogo/api" "github.com/akyoto/stringutils/unsafe" "github.com/animenotifier/notify.moe/arn" "github.com/mohae/deepcopy" ) // Download downloads a snapshot of a database collection. func Download(ctx aero.Context) error { typ := ctx.Get("type") if !arn.DB.HasType(typ) { return ctx.Error(http.StatusNotFound, "Type doesn't exist") } if arn.IsPrivateType(typ) { return ctx.Error(http.StatusUnauthorized, "Type is private and can not be downloaded") } // Send headers necessary for file downloads ctx.Response().SetHeader("Content-Disposition", fmt.Sprintf(`attachment; filename="%s.dat"`, typ)) // Stream data reader, writer := io.Pipe() encoder := json.NewEncoder(writer) go func() { for object := range arn.DB.All(typ) { idObject, hasID := object.(arn.Identifiable) if !hasID { continue } // Filter out private data filter, isFilter := object.(api.Filter) if isFilter && filter.ShouldFilter(ctx) { object = deepcopy.Copy(object) filter = object.(api.Filter) filter.Filter() } // Write ID _, err := writer.Write(unsafe.StringToBytes(idObject.GetID())) if err != nil { _ = writer.CloseWithError(err) return } // Write newline _, err = writer.Write([]byte("\n")) if err != nil { _ = writer.CloseWithError(err) return } // Write JSON (newline included) err = encoder.Encode(object) if err != nil { _ = writer.CloseWithError(err) return } } writer.Close() }() return ctx.Reader(reader) }