:recycle: take refering url from the gradio environment

app.py

@@ -97,7 +97,7 @@ initial_model = NEMOTRON
 
 REFLECTION_SYSTEM_PROMPT = """You are a world-class AI system, capable of complex reasoning and reflection. Reason through the query inside <thinking> tags, and then provide your final response inside <output> tags. If you detect that you made a mistake in your reasoning at any point, correct yourself inside <reflection> tags."""
 
-def respond(message, history, model):
+def respond(message, history, model, request: gr.Request):
     # insist on that model is in model_choices
     if not model_in_list(model):
         raise RuntimeError(f"{model} is not supported in this hf space. Visit https://featherless.ai to see and use the complete model catalogue")
@@ -121,7 +121,7 @@ def respond(message, history, model):
         stream=True,
         max_tokens=2000,
         extra_headers={
-            'HTTP-Referer': 'https://huggingface.co/spaces/featherless-ai/try-this-model',
+            'HTTP-Referer': request.headers.get('referer'),
             'X-Title': "HF's missing inference widget"
         }
     )