chore: initial public snapshot for github upload

llm-gateway-competitors/litellm-wheel-src/litellm/llms/hosted_vllm/responses/transformation.py

@@ -0,0 +1,75 @@
+"""
+Responses API transformation for Hosted VLLM provider.
+
+vLLM natively supports the OpenAI-compatible /v1/responses endpoint,
+so this config enables direct routing instead of falling back to
+the chat completions → responses conversion pipeline.
+"""
+
+from typing import Optional
+
+from litellm.llms.openai.responses.transformation import OpenAIResponsesAPIConfig
+from litellm.secret_managers.main import get_secret_str
+from litellm.types.router import GenericLiteLLMParams
+from litellm.types.utils import LlmProviders
+
+
+class HostedVLLMResponsesAPIConfig(OpenAIResponsesAPIConfig):
+    """
+    Configuration for Hosted VLLM Responses API support.
+
+    Extends OpenAI's config since vLLM follows OpenAI's API spec,
+    but uses HOSTED_VLLM_API_BASE for the base URL and defaults
+    to "fake-api-key" when no API key is provided (vLLM does not
+    require authentication by default).
+    """
+
+    @property
+    def custom_llm_provider(self) -> LlmProviders:
+        return LlmProviders.HOSTED_VLLM
+
+    def validate_environment(
+        self,
+        headers: dict,
+        model: str,
+        litellm_params: Optional[GenericLiteLLMParams],
+    ) -> dict:
+        litellm_params = litellm_params or GenericLiteLLMParams()
+        api_key = (
+            litellm_params.api_key
+            or get_secret_str("HOSTED_VLLM_API_KEY")
+            or "fake-api-key"
+        )  # vllm does not require an api key
+        headers.update(
+            {
+                "Authorization": f"Bearer {api_key}",
+            }
+        )
+        return headers
+
+    def get_complete_url(
+        self,
+        api_base: Optional[str],
+        litellm_params: dict,
+    ) -> str:
+        api_base = api_base or get_secret_str("HOSTED_VLLM_API_BASE")
+
+        if api_base is None:
+            raise ValueError(
+                "api_base not set for Hosted VLLM responses API. "
+                "Set via api_base parameter or HOSTED_VLLM_API_BASE environment variable"
+            )
+
+        # Remove trailing slashes
+        api_base = api_base.rstrip("/")
+
+        # If api_base already ends with /v1, append /responses
+        # Otherwise append /v1/responses
+        if api_base.endswith("/v1"):
+            return f"{api_base}/responses"
+
+        return f"{api_base}/v1/responses"
+
+    def supports_native_websocket(self) -> bool:
+        """Hosted vLLM does not support native WebSocket for Responses API"""
+        return False