package main import ( "io" "net/http" "path" "strconv" "strings" "sync" "time" sdk "github.com/nspcc-dev/cdn-sdk" "github.com/nspcc-dev/neofs-api-go/pkg/container" "github.com/nspcc-dev/neofs-api-go/pkg/object" "github.com/pkg/errors" "github.com/valyala/fasthttp" "go.uber.org/zap" "google.golang.org/grpc/codes" "google.golang.org/grpc/status" ) type ( detector struct { io.Writer sync.Once contentType string } request struct { *fasthttp.RequestCtx log *zap.Logger obj sdk.ObjectClient } objectIDs []*object.ID ) func newDetector(w io.Writer) *detector { return &detector{Writer: w} } func (d *detector) Write(data []byte) (int, error) { d.Once.Do(func() { d.contentType = http.DetectContentType(data) }) return d.Writer.Write(data) } func (r *request) receiveFile(address *object.Address) { var ( err error dis = "inline" start = time.Now() filename string ) writer := newDetector(r.Response.BodyWriter()) obj, err := r.obj.Get(r, address, sdk.WithGetWriter(writer)) if err != nil { r.log.Error("could not receive object", zap.Stringer("elapsed", time.Since(start)), zap.Error(err)) var ( msg = errors.Wrap(err, "could not receive object").Error() code = fasthttp.StatusBadRequest ) if st, ok := status.FromError(errors.Cause(err)); ok && st != nil { if st.Code() == codes.NotFound { code = fasthttp.StatusNotFound } msg = st.Message() } r.Error(msg, code) return } if r.Request.URI().QueryArgs().GetBool("download") { dis = "attachment" } r.Response.Header.Set("Content-Length", strconv.FormatUint(obj.PayloadSize(), 10)) r.Response.Header.Set("x-object-id", obj.ID().String()) r.Response.Header.Set("x-owner-id", obj.OwnerID().String()) r.Response.Header.Set("x-container-id", obj.ContainerID().String()) for _, attr := range obj.Attributes() { key := attr.Key() val := attr.Value() r.Response.Header.Set("x-"+key, val) switch key { case object.AttributeFileName: filename = val case object.AttributeTimestamp: value, err := strconv.ParseInt(val, 10, 64) if err != nil { r.log.Info("couldn't parse creation date", zap.String("key", key), zap.String("val", val), zap.Error(err)) continue } r.Response.Header.Set("Last-Modified", time.Unix(value, 0).Format(time.RFC1123)) } } r.SetContentType(writer.contentType) r.Response.Header.Set("Content-Disposition", dis+"; filename="+path.Base(filename)) } func (o objectIDs) Slice() []string { res := make([]string, 0, len(o)) for _, oid := range o { res = append(res, oid.String()) } return res } func (a *app) request(ctx *fasthttp.RequestCtx, log *zap.Logger) *request { return &request{ RequestCtx: ctx, log: log, obj: a.cli.Object(), } } func (a *app) byAddress(c *fasthttp.RequestCtx) { var ( err error adr = object.NewAddress() cid, _ = c.UserValue("cid").(string) oid, _ = c.UserValue("oid").(string) val = strings.Join([]string{cid, oid}, "/") log = a.log.With( zap.String("cid", cid), zap.String("oid", oid)) ) if err = adr.Parse(val); err != nil { log.Error("wrong object address", zap.Error(err)) c.Error("wrong object address", fasthttp.StatusBadRequest) return } a.request(c, log).receiveFile(adr) } func (a *app) byAttribute(c *fasthttp.RequestCtx) { var ( err error ids []*object.ID cid = container.NewID() adr = object.NewAddress() sCID, _ = c.UserValue("cid").(string) key, _ = c.UserValue("attr_key").(string) val, _ = c.UserValue("attr_val").(string) log = a.log.With( zap.String("cid", sCID), zap.String("attr_key", key), zap.String("attr_val", val)) ) if err = cid.Parse(sCID); err != nil { log.Error("wrong container id", zap.Error(err)) c.Error("wrong container id", fasthttp.StatusBadRequest) return } else if ids, err = a.cli.Object().Search(c, cid, sdk.SearchRootObjects(), sdk.SearchByAttribute(key, val)); err != nil { log.Error("something went wrong", zap.Error(err)) c.Error("something went wrong", fasthttp.StatusBadRequest) return } else if len(ids) == 0 { c.Error("not found", fasthttp.StatusNotFound) return } if len(ids) > 1 { log.Debug("found multiple objects", zap.Strings("object_ids", objectIDs(ids).Slice()), zap.Stringer("show_object_id", ids[0])) } adr.SetContainerID(cid) adr.SetObjectID(ids[0]) a.request(c, log).receiveFile(adr) }