Sub2API v1.0 - AI API 网关（二开初始版本，基于上游 Wei-Shaw/sub2api）

backend/internal/service/openai_ws_v2/caddy_adapter.go

@@ -0,0 +1,24 @@
+package openai_ws_v2
+
+import (
+	"context"
+)
+
+// runCaddyStyleRelay 采用 Caddy reverseproxy 的双向隧道思想：
+// 连接建立后并发复制两个方向，任一方向退出触发收敛关闭。
+//
+// Reference:
+// - Project: caddyserver/caddy (Apache-2.0)
+// - Commit: f283062d37c50627d53ca682ebae2ce219b35515
+// - Files:
+//   - modules/caddyhttp/reverseproxy/streaming.go
+//   - modules/caddyhttp/reverseproxy/reverseproxy.go
+func runCaddyStyleRelay(
+	ctx context.Context,
+	clientConn FrameConn,
+	upstreamConn FrameConn,
+	firstClientMessage []byte,
+	options RelayOptions,
+) (RelayResult, *RelayExit) {
+	return Relay(ctx, clientConn, upstreamConn, firstClientMessage, options)
+}