Update app.py

app.py

@@ -392,13 +392,23 @@ async def get_info():
 
 def find_available_port(start_port: int = 8000, max_attempts: int = 10) -> int:
     """Find an available port starting from start_port"""
+    import random
+    import time
+    
+    # Add some randomization to avoid race conditions
+    time.sleep(random.uniform(0.1, 0.5))
+    
     for port in range(start_port, start_port + max_attempts):
         try:
-            # Try to bind to the port
+            # Try to bind to the port with proper error handling
             with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
+                s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
                 s.bind(('0.0.0.0', port))
+                s.listen(1)
+                print(f"✅ Port {port} is available")
                 return port
-        except OSError:
+        except OSError as e:
+            print(f"❌ Port {port} is busy: {e}")
             continue
     
     # If no port found, raise an exception
@@ -406,15 +416,43 @@ def find_available_port(start_port: int = 8000, max_attempts: int = 10) -> int:
 
 if __name__ == "__main__":
     try:
-        # Find an available port
-        port = find_available_port(8000)
+        # Check if we're in a Hugging Face environment
+        is_hf_space = os.getenv('SPACE_ID') is not None
+        
+        if is_hf_space:
+            print("🤗 Running in Hugging Face Spaces environment")
+            # Use a wider port range for HF Spaces
+            port = find_available_port(8000, 20)
+        else:
+            # Find an available port
+            port = find_available_port(8000, 10)
+            
         print(f"🚀 Starting server on port {port}")
-        uvicorn.run(app, host="0.0.0.0", port=port)
+        
+        # Add retry logic for startup
+        max_retries = 3
+        for attempt in range(max_retries):
+            try:
+                uvicorn.run(app, host="0.0.0.0", port=port)
+                break  # If successful, break out of retry loop
+            except OSError as e:
+                if "Address already in use" in str(e) and attempt < max_retries - 1:
+                    print(f"⚠️ Port {port} became busy, trying next port...")
+                    port = find_available_port(port + 1, 10)
+                    print(f"🔄 Retrying on port {port}")
+                else:
+                    raise
+                    
     except RuntimeError as e:
         print(f"❌ {e}")
-        print("💡 You can also manually specify a different port by running:")
-        print("   uvicorn app:app --host 0.0.0.0 --port YOUR_PORT_NUMBER")
+        print("💡 Suggestions:")
+        print("   1. Wait a moment and try again (another instance might be shutting down)")
+        print("   2. Manually specify a different port:")
+        print("      uvicorn app:app --host 0.0.0.0 --port 8001")
+        print("   3. Check for running processes: ps aux | grep python")
     except KeyboardInterrupt:
         print("\n🛑 Server stopped by user")
     except Exception as e:
-        print(f"❌ Failed to start server: {e}") 
+        print(f"❌ Failed to start server: {e}")
+        import traceback
+        traceback.print_exc()