feat: complete OCI registry implementation with docker push/pull support

A lightweight OCI (Open Container Initiative) registry implementation written in Go.

pkg/resp/sse.go

@@ -0,0 +1,75 @@
+package resp
+
+import (
+	"bufio"
+	"encoding/json"
+	"fmt"
+	"time"
+
+	"github.com/gofiber/fiber/v3"
+)
+
+type SSEManager struct {
+	c     fiber.Ctx
+	event string
+	ch    chan string
+	id    int64
+}
+
+func (m *SSEManager) Send(msg string) {
+	m.ch <- msg
+}
+
+func (m *SSEManager) JSON(data any) {
+	bs, err := json.Marshal(data)
+	if err != nil {
+		m.ch <- err.Error()
+		return
+	}
+
+	m.ch <- string(bs)
+}
+
+func (m *SSEManager) Writer() func(w *bufio.Writer) {
+	return func(w *bufio.Writer) {
+		for msg := range m.ch {
+			fmt.Fprintf(w, "event: %s\nid: %d\ntimestamp: %d\ndata: %s\n\n", m.event, m.id, time.Now().UnixMilli(), msg)
+			w.Flush()
+			m.id++
+		}
+		w.Flush()
+	}
+}
+
+func (m *SSEManager) Close() {
+	close(m.ch)
+}
+
+// SSE create a new SSEManager
+// example:
+//
+//	func someHandler(c fiber.Ctx) error {
+//		m := resp.SSE(c, "test")
+//		go func() {
+//			defer m.Close()
+//			for i := range 10 {
+//				m.Send("test" + strconv.Itoa(i))
+//				time.Sleep(1 * time.Second)
+//			}
+//		}()
+//
+//		return c.SendStreamWriter(m.Writer())
+//	}
+func SSE(c fiber.Ctx, event string) *SSEManager {
+	c.Set("Content-Type", "text/event-stream")
+	c.Set("Cache-Control", "no-cache")
+	c.Set("Connection", "keep-alive")
+	c.Set("Transfer-Encoding", "chunked")
+
+	return &SSEManager{
+		c:     c,
+		event: event,
+		id:    0,
+		ch:    make(chan string, 1),
+	}
+}