use io.MultiReader instead of manual implementation

Author: anik120

catalogd/internal/storage/index.go

@@ -51,20 +51,20 @@ func (i index) Size() int64 {
 	return int64(size)
 }
 
-func (i index) Get(r io.ReaderAt, schema, packageName, name string) (io.ReadSeeker, bool) {
+func (i index) Get(r io.ReaderAt, schema, packageName, name string) (io.Reader, bool) {
 	sectionSet := i.getSectionSet(schema, packageName, name)
 
 	sections := sectionSet.UnsortedList()
 	slices.SortFunc(sections, func(a, b section) int {
 		return cmp.Compare(a.offset, b.offset)
 	})
 
-	srs := make([]io.ReadSeeker, 0, len(sections))
+	srs := make([]io.Reader, 0, len(sections))
 	for _, s := range sections {
 		sr := io.NewSectionReader(r, s.offset, s.length)
 		srs = append(srs, sr)
 	}
-	return newMultiReadSeeker(srs...), true
+	return io.MultiReader(srs...), true
 }
 
 func (i *index) getSectionSet(schema, packageName, name string) sets.Set[section] {

catalogd/internal/storage/localdir.go

@@ -236,7 +236,7 @@ func (s *LocalDirV1) handleV1Query(w http.ResponseWriter, r *http.Request) {
 		httpError(w, fs.ErrNotExist)
 		return
 	}
-	serveJsonLines(w, r, catalogStat.ModTime(), indexReader)
+	serveJsonLinesQuery(w, indexReader)
 }
 
 func (s *LocalDirV1) catalogData(catalog string) (*os.File, os.FileInfo, error) {
@@ -271,6 +271,15 @@ func serveJsonLines(w http.ResponseWriter, r *http.Request, modTime time.Time, r
 	http.ServeContent(w, r, "", modTime, rs)
 }
 
+func serveJsonLinesQuery(w http.ResponseWriter, rs io.Reader) {
+	w.Header().Add("Content-Type", "application/jsonl")
+	_, err := io.Copy(w, rs)
+	if err != nil {
+		httpError(w, err)
+		return
+	}
+}
+
 func (s *LocalDirV1) getIndex(catalog string) (*index, error) {
 	idx, err, _ := s.sf.Do(catalog, func() (interface{}, error) {
 		indexFile, err := os.Open(catalogIndexFilePath(s.catalogDir(catalog)))