corrects malformed json in blossom list

This should fix the failing pipeline test

blossom/handlers.go

@@ -9,6 +9,7 @@ import (
 	"net/http"
 	"strconv"
 	"strings"
+	"time"
 
 	"github.com/liamg/magic"
 	"github.com/nbd-wtf/go-nostr"
@@ -190,8 +191,14 @@ func (bs BlossomServer) handleGetBlob(w http.ResponseWriter, r *http.Request) {
 	for _, lb := range bs.LoadBlob {
 		reader, _ := lb(r.Context(), hhash)
 		if reader != nil {
-			w.Header().Add("Content-Type", mime.TypeByExtension(ext))
-			io.Copy(w, reader)
+			// use unix epoch as the time if we can't find the descriptor
+			// as described in the http.ServeContent documentation
+			t := time.Unix(0, 0)
+			descriptor, err := bs.Store.Get(r.Context(), hhash)
+			if err == nil && descriptor != nil {
+				t = descriptor.Uploaded.Time()
+			}
+			http.ServeContent(w, r, hhash+ext, t, reader)
 			return
 		}
 	}
@@ -257,7 +264,13 @@ func (bs BlossomServer) handleList(w http.ResponseWriter, r *http.Request) {
 
 	w.Write([]byte{'['})
 	enc := json.NewEncoder(w)
+	first := true
 	for bd := range ch {
+		if !first {
+			w.Write([]byte{','})
+		} else {
+			first = false
+		}
 		enc.Encode(bd)
 	}
 	w.Write([]byte{']'})

blossom/server.go

@@ -15,7 +15,7 @@ type BlossomServer struct {
 	Store      BlobIndex
 
 	StoreBlob  []func(ctx context.Context, sha256 string, body []byte) error
-	LoadBlob   []func(ctx context.Context, sha256 string) (io.Reader, error)
+	LoadBlob   []func(ctx context.Context, sha256 string) (io.ReadSeeker, error)
 	DeleteBlob []func(ctx context.Context, sha256 string) error
 
 	RejectUpload []func(ctx context.Context, auth *nostr.Event, size int, ext string) (bool, string, int)

examples/blossom/main.go

@@ -31,7 +31,7 @@ func main() {
 		fmt.Println("storing", sha256, len(body))
 		return nil
 	})
-	bl.LoadBlob = append(bl.LoadBlob, func(ctx context.Context, sha256 string) (io.Reader, error) {
+	bl.LoadBlob = append(bl.LoadBlob, func(ctx context.Context, sha256 string) (io.ReadSeeker, error) {
 		fmt.Println("loading", sha256)
 		blob := strings.NewReader("aaaaa")
 		return blob, nil