From 0da2378c5ddd866ca4c1486ecf630771cf6b81c0 Mon Sep 17 00:00:00 2001
From: Victor Chang <stone0504@gmail.com>
Date: Fri, 28 Feb 2025 12:49:46 +0000
Subject: [PATCH] first commit

---
 monitor_network.py | 91 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100755 monitor_network.py

diff --git a/monitor_network.py b/monitor_network.py
new file mode 100755
index 0000000..46ce1e9
--- /dev/null
+++ b/monitor_network.py
@@ -0,0 +1,91 @@
+import subprocess
+import time
+import platform
+import requests
+from datetime import datetime
+try:
+    from zoneinfo import ZoneInfo
+except ImportError:
+    from backports.zoneinfo import ZoneInfo # type: ignore
+
+class ServerMonitor:
+    def __init__(self):
+        # Server settings
+        self.SERVER_IP = "ntc381.tplinkdns.com"
+        self.GOOGLE_DNS = "8.8.8.8"
+        self.INTERVAL = 10
+        self.MAX_RETRIES = 5
+        # LINE Notify settings
+        self.LINE_NOTIFY_TOKEN = "Yv0j6udRR1YzxfCybUWkfZ2a6KxAELZAyhtpEepwhrI"
+        self.LINE_NOTIFY_API = "https://notify-api.line.me/api/notify"
+
+    def notify(self, message):
+        headers = {"Authorization": f"Bearer {self.LINE_NOTIFY_TOKEN}"}
+        payload = {"message": message}
+        try:
+            response = requests.post(self.LINE_NOTIFY_API, headers=headers, data=payload)
+            response.raise_for_status()
+        except requests.exceptions.RequestException as e:
+            print(f"Failed to send LINE notification: {e}")
+
+    def now_time(self):
+        now_utc = datetime.now(ZoneInfo("UTC"))
+        taipei_time = now_utc.astimezone(ZoneInfo("Asia/Taipei"))
+        return taipei_time.strftime("%Y-%m-%d %H:%M:%S")
+
+    def ping_server(self, target):
+        system = platform.system()
+        ping_command = ["ping", "-n", "1", target] if system == "Windows" else ["ping", "-c", "1", target]
+        
+        try:
+            result = subprocess.run(ping_command, capture_output=True, text=True, check=True)
+            return True
+        except subprocess.CalledProcessError:
+            return False
+            
+    def fail_check(self):
+        if not self.ping_server(self.SERVER_IP):
+            message = f"{self.now_time()}: Host is unreachable after {self.MAX_RETRIES} attempts!!!"
+            print(message)
+            self.notify(message)
+            offline_time = 0
+            while not self.ping_server(self.SERVER_IP):
+                offline_time += self.INTERVAL
+                message = f"{self.now_time()}: Server is still OFFLINE. Total offline time: {offline_time} seconds"
+                print(message)
+                if offline_time % 1800 == 0:  # Notify every 30 minutes
+                    self.notify(message)
+                time.sleep(self.INTERVAL)
+        else:
+            pass
+        
+    def monitor_server(self):
+        while True:
+            is_online = False
+            for attempt in range(self.MAX_RETRIES):
+                if self.ping_server(self.SERVER_IP):
+                    is_online = True
+                    break
+                time.sleep(1)  # Short delay between retries
+
+            if is_online:
+                print(f"{self.now_time()}: Host is online.")
+            else:
+                if not self.ping_server(self.GOOGLE_DNS):
+                    print(f"{self.now_time()}: VPS Internet is down.")
+                    break
+                self.fail_check()
+
+                
+                message = f"{self.now_time()}: Server is back ONLINE."
+                print(message)
+                self.notify(message)
+            
+            time.sleep(self.INTERVAL)
+
+    def run(self):
+        self.monitor_server()
+
+if __name__ == "__main__":
+    monitor = ServerMonitor()
+    monitor.run()
\ No newline at end of file