Initial commit of video upscaler

stop.py

@@ -0,0 +1,85 @@
+#!/usr/bin/env python3
+"""
+stop.py — Stop the AI Video Upscaler web application.
+
+Usage:
+    python stop.py
+"""
+
+import os
+import signal
+import sys
+import time
+
+# ── Paths ────────────────────────────────────────────────────────────────────
+BASE_DIR = os.path.dirname(os.path.abspath(__file__))
+PID_FILE = os.path.join(BASE_DIR, ".uvicorn.pid")
+
+
+def _is_running(pid: int) -> bool:
+    """Check whether a process with the given PID is still alive and is our server."""
+    try:
+        os.kill(pid, 0)
+    except OSError:
+        return False
+
+    # Check /proc/{pid}/cmdline to verify it's our server process
+    try:
+        cmdline_path = f"/proc/{pid}/cmdline"
+        if os.path.exists(cmdline_path):
+            with open(cmdline_path, "r") as f:
+                cmdline = f.read()
+                # Check for indicators of our server
+                return "uvicorn" in cmdline or "app.main" in cmdline
+    except Exception:
+        pass
+    # If we can't read cmdline, default to True (safer fallback)
+    return True
+
+
+def stop() -> None:
+    if not os.path.isfile(PID_FILE):
+        print("ℹ  No server appears to be running (no pidfile found).")
+        return
+
+    try:
+        pid = int(open(PID_FILE).read().strip())
+    except (ValueError, OSError):
+        print("⚠  Pidfile exists but is unreadable. Removing it.")
+        os.remove(PID_FILE)
+        return
+
+    if not _is_running(pid):
+        print(f"ℹ  Server (PID {pid}) is not running. Cleaning up pidfile.")
+        os.remove(PID_FILE)
+        return
+
+    print(f"🛑 Stopping server (PID {pid}) …")
+
+    # Graceful shutdown (SIGTERM)
+    os.kill(pid, signal.SIGTERM)
+
+    # Wait up to 10 seconds for graceful exit
+    for i in range(20):
+        time.sleep(0.5)
+        if not _is_running(pid):
+            break
+    else:
+        # Force kill if still alive
+        print(f"   ⚠  Server didn't stop gracefully, sending SIGKILL …")
+        os.kill(pid, signal.SIGKILL)
+        time.sleep(0.5)
+
+    # Clean up pidfile
+    if os.path.isfile(PID_FILE):
+        os.remove(PID_FILE)
+
+    if _is_running(pid):
+        print(f"❌ Failed to stop server (PID {pid}).")
+        sys.exit(1)
+    else:
+        print(f"✅ Server stopped.")
+
+
+if __name__ == "__main__":
+    stop()