Extract webserver metrics into a separate class to avoid passing it into every API call. Change the display to requests per hour rather than just last request time. Add SSE and telnet client connected count.

webserver/handlers/api/lookups.py

@@ -1,9 +1,7 @@
 import logging
 import re
-from datetime import datetime
 from typing import Any
 
-import pytz
 import tornado
 from tornado import httputil
 from tornado.web import Application
@@ -15,7 +13,6 @@ from core.geo_utils import (
     lat_lon_to_cq_zone,
     lat_lon_to_itu_zone,
 )
-from core.prometheus_metrics_handler import api_requests_counter
 from core.sig_lookup_helper import populate_missing_sig_ref_info
 from core.sig_utils import get_ref_regex_for_sig
 from core.utils import safe_json_dumps
@@ -34,20 +31,10 @@ class APILookupCallHandler(tornado.web.RequestHandler):
         request: httputil.HTTPServerRequest,
         **kwargs: Any,
     ):
-        self._web_server_metrics = None
         super().__init__(application, request, **kwargs)
 
-    def initialize(self, web_server_metrics):
-        self._web_server_metrics = web_server_metrics
-
     def get(self):
         try:
-            # Metrics
-            self._web_server_metrics["last_api_access_time"] = datetime.now(pytz.UTC)
-            self._web_server_metrics["api_access_counter"] += 1
-            self._web_server_metrics["status"] = "OK"
-            api_requests_counter.inc()
-
             # request.arguments contains lists for each param key because technically the client can supply multiple,
             # reduce that to just the first entry, and convert bytes to string
             query_params = {k: v[0].decode("utf-8") for k, v in self.request.arguments.items()}
@@ -85,20 +72,10 @@ class APILookupSIGRefHandler(tornado.web.RequestHandler):
         request: httputil.HTTPServerRequest,
         **kwargs: Any,
     ):
-        self._web_server_metrics = None
         super().__init__(application, request, **kwargs)
 
-    def initialize(self, web_server_metrics):
-        self._web_server_metrics = web_server_metrics
-
     def get(self):
         try:
-            # Metrics
-            self._web_server_metrics["last_api_access_time"] = datetime.now(pytz.UTC)
-            self._web_server_metrics["api_access_counter"] += 1
-            self._web_server_metrics["status"] = "OK"
-            api_requests_counter.inc()
-
             # request.arguments contains lists for each param key because technically the client can supply multiple,
             # reduce that to just the first entry, and convert bytes to string
             query_params = {k: v[0].decode("utf-8") for k, v in self.request.arguments.items()}
@@ -143,20 +120,10 @@ class APILookupGridHandler(tornado.web.RequestHandler):
         request: httputil.HTTPServerRequest,
         **kwargs: Any,
     ):
-        self._web_server_metrics = None
         super().__init__(application, request, **kwargs)
 
-    def initialize(self, web_server_metrics):
-        self._web_server_metrics = web_server_metrics
-
     def get(self):
         try:
-            # Metrics
-            self._web_server_metrics["last_api_access_time"] = datetime.now(pytz.UTC)
-            self._web_server_metrics["api_access_counter"] += 1
-            self._web_server_metrics["status"] = "OK"
-            api_requests_counter.inc()
-
             # request.arguments contains lists for each param key because technically the client can supply multiple,
             # reduce that to just the first entry, and convert bytes to string
             query_params = {k: v[0].decode("utf-8") for k, v in self.request.arguments.items()}