[router][grpc] Refine streaming processes (#11277)

sgl-router/src/reasoning_parser/parsers/base.rs

@@ -187,6 +187,10 @@ impl ReasoningParser for BaseReasoningParser {
     fn model_type(&self) -> &str {
         &self.model_type
     }
+
+    fn is_in_reasoning(&self) -> bool {
+        self.in_reasoning
+    }
 }
 
 #[cfg(test)]

sgl-router/src/reasoning_parser/parsers/deepseek_r1.rs

@@ -55,6 +55,10 @@ impl ReasoningParser for DeepSeekR1Parser {
     fn model_type(&self) -> &str {
         self.base.model_type()
     }
+
+    fn is_in_reasoning(&self) -> bool {
+        self.base.is_in_reasoning()
+    }
 }
 
 #[cfg(test)]

sgl-router/src/reasoning_parser/parsers/glm45.rs

@@ -54,6 +54,10 @@ impl ReasoningParser for Glm45Parser {
     fn model_type(&self) -> &str {
         self.base.model_type()
     }
+
+    fn is_in_reasoning(&self) -> bool {
+        self.base.is_in_reasoning()
+    }
 }
 
 #[cfg(test)]

sgl-router/src/reasoning_parser/parsers/kimi.rs

@@ -54,6 +54,10 @@ impl ReasoningParser for KimiParser {
     fn model_type(&self) -> &str {
         self.base.model_type()
     }
+
+    fn is_in_reasoning(&self) -> bool {
+        self.base.is_in_reasoning()
+    }
 }
 
 #[cfg(test)]

sgl-router/src/reasoning_parser/parsers/qwen3.rs

@@ -55,6 +55,10 @@ impl ReasoningParser for Qwen3Parser {
     fn model_type(&self) -> &str {
         self.base.model_type()
     }
+
+    fn is_in_reasoning(&self) -> bool {
+        self.base.is_in_reasoning()
+    }
 }
 
 /// QwenThinking parser - variant that assumes reasoning from start.
@@ -106,6 +110,10 @@ impl ReasoningParser for QwenThinkingParser {
     fn model_type(&self) -> &str {
         self.base.model_type()
     }
+
+    fn is_in_reasoning(&self) -> bool {
+        self.base.is_in_reasoning()
+    }
 }
 
 #[cfg(test)]

sgl-router/src/reasoning_parser/parsers/step3.rs

@@ -54,6 +54,10 @@ impl ReasoningParser for Step3Parser {
     fn model_type(&self) -> &str {
         self.base.model_type()
     }
+
+    fn is_in_reasoning(&self) -> bool {
+        self.base.is_in_reasoning()
+    }
 }
 
 #[cfg(test)]

sgl-router/src/reasoning_parser/traits.rs

@@ -69,6 +69,11 @@ pub trait ReasoningParser: Send + Sync {
 
     /// Get the model type this parser is designed for.
     fn model_type(&self) -> &str;
+
+    /// Check if the parser is currently in reasoning mode.
+    ///
+    /// Returns true if the parser is currently parsing reasoning content.
+    fn is_in_reasoning(&self) -> bool;
 }
 
 /// Error types for reasoning parsing operations.