[router] allow one router to support different model families and serving mode (#10244)

sgl-router/src/routers/http/openai_router.rs

@@ -186,6 +186,7 @@ impl super::super::RouterTrait for OpenAIRouter {
         &self,
         _headers: Option<&HeaderMap>,
         _body: &GenerateRequest,
+        _model_id: Option<&str>,
     ) -> Response {
         // Generate endpoint is SGLang-specific, not supported for OpenAI backend
         (
@@ -199,6 +200,7 @@ impl super::super::RouterTrait for OpenAIRouter {
         &self,
         headers: Option<&HeaderMap>,
         body: &ChatCompletionRequest,
+        _model_id: Option<&str>,
     ) -> Response {
         if !self.circuit_breaker.can_execute() {
             return (StatusCode::SERVICE_UNAVAILABLE, "Circuit breaker open").into_response();
@@ -326,6 +328,7 @@ impl super::super::RouterTrait for OpenAIRouter {
         &self,
         _headers: Option<&HeaderMap>,
         _body: &CompletionRequest,
+        _model_id: Option<&str>,
     ) -> Response {
         // Completion endpoint not implemented for OpenAI backend
         (
@@ -339,6 +342,7 @@ impl super::super::RouterTrait for OpenAIRouter {
         &self,
         _headers: Option<&HeaderMap>,
         _body: &crate::protocols::spec::ResponsesRequest,
+        _model_id: Option<&str>,
     ) -> Response {
         (
             StatusCode::NOT_IMPLEMENTED,
@@ -383,7 +387,12 @@ impl super::super::RouterTrait for OpenAIRouter {
             .into_response()
     }
 
-    async fn route_rerank(&self, _headers: Option<&HeaderMap>, _body: &RerankRequest) -> Response {
+    async fn route_rerank(
+        &self,
+        _headers: Option<&HeaderMap>,
+        _body: &RerankRequest,
+        _model_id: Option<&str>,
+    ) -> Response {
         (
             StatusCode::NOT_IMPLEMENTED,
             "Rerank endpoint not implemented for OpenAI backend",