add health check for api server

apiserver/Dockerfile

@@ -7,6 +7,10 @@ RUN pip install --no-cache-dir -r /app/requirements.txt
 
 RUN pyarmor gen --output /app /app/main.py
 
+RUN apk --update --no-cache add curl
+
+HEALTHCHECK --start-period=10s --interval=60s --timeout=3s CMD curl -f http://localhost:8888/health || exit 1
+
 RUN mkdir /cache
 VOLUME /cache
 

apiserver/main.py

@@ -51,6 +51,8 @@
     " ".join([STOCKS, INDICES, CRYPTOS, CURRENCIES, COMMODITIES])
 )
 
+lastUpdatedTime = time.time()
+
 
 class apiHandler(http.server.BaseHTTPRequestHandler):
     def log_message(self, format, *args):
@@ -67,6 +69,13 @@ def do_GET(self):
             response = json.dumps(
                 {**crypto_status, **currency_status, **commodity_status}
             )
+        elif self.path == "/health":
+            if time.time() - lastUpdatedTime > 1200:
+                self.send_response(500)
+            else:
+                self.send_response(200)
+            self.send_header("Content-type", "application/json")
+            self.end_headers()
         else:
             message = {"message": "Not Found"}
             response = json.dumps(message)
@@ -150,7 +159,7 @@ def get_xui_status():
         "up": bytes_to_speed(status["obj"]["netIO"]["up"]),
         "down": bytes_to_speed(status["obj"]["netIO"]["down"]),
         "usage": format_bytes(status["obj"]["netTraffic"]["recv"]),
-        "online": random.choice(online["obj"]) if online["obj"] else '-',
+        "online": random.choice(online["obj"]) if online["obj"] else "-",
     }
     return info
 
@@ -211,6 +220,9 @@ def update_status(symbols):
     with open(MAPPING[symbols][1], "w") as file:
         json.dump(MAPPING[symbols][0], file)
 
+    global lastUpdatedTime
+    lastUpdatedTime = time.time()
+
 
 if __name__ == "__main__":
     load_all_cache()