Don't track route not found errors

config/config.exs

@@ -7,7 +7,11 @@
 # General application configuration
 import Config
 
-config :error_tracker, repo: MusicLibrary.Repo, otp_app: :music_library, enabled: false
+config :error_tracker,
+  repo: MusicLibrary.Repo,
+  otp_app: :music_library,
+  enabled: false,
+  ignorer: MusicLibrary.ErrorIgnorer
 
 config :elixir, :time_zone_database, TimeZoneInfo.TimeZoneDatabase
 

lib/music_library/error_ignorer.ex

@@ -0,0 +1,18 @@
+defmodule MusicLibrary.ErrorIgnorer do
+  @moduledoc """
+  Ignores errors that should not be tracked by ErrorTracker.
+
+  Bot scanners and crawlers routinely hit non-existent paths, generating
+  NoRouteError exceptions that are not actionable. We ignore them here
+  rather than blocking specific paths in the endpoint.
+  """
+  @behaviour ErrorTracker.Ignorer
+
+  @ignored_kinds [
+    to_string(Phoenix.Router.NoRouteError)
+  ]
+
+  @impl true
+  def ignore?(%ErrorTracker.Error{kind: kind}, _context) when kind in @ignored_kinds, do: true
+  def ignore?(_error, _context), do: false
+end

lib/music_library_web/endpoint.ex

@@ -43,8 +43,6 @@ defmodule MusicLibraryWeb.Endpoint do
     plug Phoenix.Ecto.CheckRepoStatus, otp_app: :music_library
   end
 
-  plug :reject_bot_scanners
-
   plug Phoenix.LiveDashboard.RequestLogger,
     param_key: "request_logger",
     cookie_key: "request_logger"
@@ -61,29 +59,4 @@ defmodule MusicLibraryWeb.Endpoint do
   plug Plug.Head
   plug Plug.Session, @session_options
   plug MusicLibraryWeb.Router
-
-  defp reject_bot_scanners(%{request_path: "/wp-" <> _} = conn, _opts),
-    do: conn |> send_resp(404, "") |> halt()
-
-  defp reject_bot_scanners(%{request_path: "/wordpress" <> _} = conn, _opts),
-    do: conn |> send_resp(404, "") |> halt()
-
-  @blocked_paths [
-    "/.env",
-    "/admin",
-    "/blog/wp-includes/wlwmanifest.xml",
-    "/files.php",
-    "/grsiuk.php",
-    "/jq.php",
-    "/style.php",
-    "/vgtyu.php",
-    "/vx.php",
-    "/xleet.php",
-    "/xmlrpc.php"
-  ]
-
-  defp reject_bot_scanners(%{request_path: path} = conn, _opts) when path in @blocked_paths,
-    do: conn |> send_resp(404, "") |> halt()
-
-  defp reject_bot_scanners(conn, _opts), do: conn
 end