fix: proxy transparent MP4 effect ranges

services/gateway-service/internal/transport/http/appapi/media_proxy_handler.go

@@ -20,6 +20,7 @@ var (
 		"media.haiyihy.com": {},
 	}
 	effectMediaProxyExtensions = map[string]string{
+		".mp4":  "video/mp4",
 		".pag":  "application/octet-stream",
 		".svga": "application/octet-stream",
 	}
@@ -42,6 +43,11 @@ func (h *Handler) proxyEffectMedia(writer http.ResponseWriter, request *http.Req
 	}
 	upstreamRequest.Header.Set("Accept", "application/octet-stream,*/*")
 	upstreamRequest.Header.Set("User-Agent", "hyapp-gateway-effect-media-proxy/1.0")
+	// 透明 MP4 的浏览器播放器需要 seek 多个采样帧来拆分 RGB/Alpha 通道；透传 Range
+	// 才能让 video 元素按需取片段，而不是每次检测都重新下载整段动效。
+	if value := strings.TrimSpace(request.Header.Get("Range")); value != "" {
+		upstreamRequest.Header.Set("Range", value)
+	}
 
 	upstream, err := effectMediaProxyHTTPClient.Do(upstreamRequest)
 	if err != nil {
@@ -66,11 +72,17 @@ func (h *Handler) proxyEffectMedia(writer http.ResponseWriter, request *http.Req
 	header.Set("Content-Type", contentType)
 	header.Set("Cache-Control", "public, max-age=86400")
 	header.Set("X-Content-Type-Options", "nosniff")
+	if value := strings.TrimSpace(upstream.Header.Get("Accept-Ranges")); value != "" {
+		header.Set("Accept-Ranges", value)
+	}
+	if value := strings.TrimSpace(upstream.Header.Get("Content-Range")); value != "" {
+		header.Set("Content-Range", value)
+	}
 	if upstream.ContentLength >= 0 {
 		header.Set("Content-Length", strconv.FormatInt(upstream.ContentLength, 10))
 	}
 
-	writer.WriteHeader(http.StatusOK)
+	writer.WriteHeader(upstream.StatusCode)
 	_, _ = io.Copy(writer, io.LimitReader(upstream.Body, effectMediaProxyMaxBytes+1))
 }
 

services/gateway-service/internal/transport/http/appapi/media_proxy_handler_test.go

@@ -8,6 +8,11 @@ func TestValidateEffectMediaProxyURL(t *testing.T) {
 		url  string
 		ok   bool
 	}{
+		{
+			name: "mp4 media host",
+			url:  "https://media.haiyihy.com/admin/files/1/20260602/file.mp4?sign=1",
+			ok:   true,
+		},
 		{
 			name: "svga media host",
 			url:  "https://media.haiyihy.com/admin/files/1/20260602/file.svga",