Add debug endpoint and improve error handling for Vapi troubleshooting

app.py

@@ -55,6 +55,20 @@ def health_check():
         "base_model": BASE_MODEL
     }), 200
 
+@app.route("/debug", methods=["POST"])
+def debug_endpoint():
+    """Debug endpoint to see what Vapi is sending"""
+    try:
+        data = request.get_json()
+        headers = dict(request.headers)
+        return jsonify({
+            "received_data": data,
+            "received_headers": headers,
+            "status": "debug_ok"
+        }), 200
+    except Exception as e:
+        return jsonify({"error": str(e)}), 500
+
 @app.route("/chat/completions", methods=["POST", "OPTIONS"])
 def chat_completions():
     # Log incoming request
@@ -62,7 +76,7 @@ def chat_completions():
     print(f"NEW REQUEST: {request.method} from {request.remote_addr}")
     print(f"Headers: {dict(request.headers)}")
     if request.method == "POST":
-        print(f"Body: {request.get_data(as_text=True)[:200]}...")
+        print(f"Body: {request.get_data(as_text=True)[:500]}...")
     print("=" * 60)
     
     # OPTIONS isteği için preflight response
@@ -209,12 +223,26 @@ def chat_completions():
     except Exception as e:
         import traceback
         error_details = traceback.format_exc()
-        print(f"Error: {str(e)}")
+        print(f"ERROR: {str(e)}")
         print(f"Traceback: {error_details}")
-        return jsonify({
-            "error": str(e),
-            "type": type(e).__name__
-        }), 500
+        
+        # Return error in both streaming and non-streaming format
+        error_response = {
+            "error": {
+                "message": str(e),
+                "type": type(e).__name__,
+                "code": "internal_error"
+            }
+        }
+        
+        # If streaming was requested, return error in SSE format
+        if 'stream' in locals() and stream:
+            def error_stream():
+                yield f"data: {__import__('json').dumps(error_response)}\n\n"
+                yield "data: [DONE]\n\n"
+            return app.response_class(error_stream(), mimetype='text/event-stream')
+        
+        return jsonify(error_response), 500
 
 if __name__ == "__main__":
     app.run(host="0.0.0.0", port=7860)