lib/chronoscope/application.ex

@@ -23,6 +23,7 @@ defmodule Chronoscope.Application do
       {Registry, [keys: :unique, name: Chronoscope.Gemini.Registry]},
       # Start to serve requests, typically the last entry
       ChronoscopeWeb.Endpoint,
+      # Initialize clients for the main LiveView
       Chronoscope.ViewActivator
     ]
 

lib/chronoscope/view_activator.ex

@@ -33,6 +33,7 @@ defmodule Chronoscope.ViewActivator do
     @nts_file
     |> File.stream!()
     |> Stream.map(&String.trim/1)
+    |> Stream.filter(&(&1 != ""))
     |> Stream.map(&Parse.parse_nts_server/1)
     |> Enum.to_list()
     |> tap(fn server -> Enum.each(server, &NTS.auto_refresh/1) end)

lib/chronoscope_web/controllers/api/v1/gemini/connection_controller.ex

@@ -13,7 +13,7 @@ defmodule ChronoscopeWeb.API.V1.Gemini.ConnectionController do
 
   def get(conn, %{"host" => host, "port" => port, "path" => path}) do
     try do
-      handle_get(conn, %{host: host, port: String.to_integer(port), path: path})
+      handle_get(conn, %{host: String.trim(host), port: String.to_integer(port), path: path})
     rescue
       ArgumentError -> bad_request_response(conn, "invalid port")
     end
@@ -25,20 +25,24 @@ defmodule ChronoscopeWeb.API.V1.Gemini.ConnectionController do
 
   def get(conn, %{"host" => host, "port" => port}) do
     try do
-      handle_get(conn, %{host: host, port: String.to_integer(port), path: @default_path})
+      handle_get(conn, %{host: String.trim(host), port: String.to_integer(port), path: @default_path})
     rescue
       ArgumentError -> bad_request_response(conn, "invalid port")
     end
   end
 
   def get(conn, %{"host" => host}) do
-    handle_get(conn, %{host: host, port: @default_port, path: @default_path})
+    handle_get(conn, %{host: String.trim(host), port: @default_port, path: @default_path})
   end
 
   def get(conn, _params) do
     bad_request_response(conn, "missing host")
   end
 
+  defp handle_get(conn, %{host: ""}) do
+    bad_request_response(conn, "empty host")
+  end
+
   defp handle_get(conn, %{host: host, port: port, path: path}) when port > 0 and port < 65536 do
     case connect(host, port, path) do
       {:ok, response} ->

lib/chronoscope_web/controllers/api/v1/nts/key_establishment_controller.ex

@@ -12,20 +12,24 @@ defmodule ChronoscopeWeb.API.V1.NTS.KeyEstablishmentController do
 
   def get(conn, %{"host" => host, "port" => port}) do
     try do
-      handle_get(conn, %{host: host, port: String.to_integer(port)})
+      handle_get(conn, %{host: String.trim(host), port: String.to_integer(port)})
     rescue
       ArgumentError -> bad_request_response(conn, "invalid port")
     end
   end
 
   def get(conn, %{"host" => host}) do
-    handle_get(conn, %{host: host, port: @default_port})
+    handle_get(conn, %{host: String.trim(host), port: @default_port})
   end
 
   def get(conn, _params) do
     bad_request_response(conn, "missing host")
   end
 
+  defp handle_get(conn, %{host: ""}) do
+    bad_request_response(conn, "empty host")
+  end
+
   defp handle_get(conn, %{host: host, port: port}) when port > 0 and port < 65536 do
     case key_establishment_response(host, port) do
       {:ok, response} ->

lib/chronoscope_web/live/index_live.ex

@@ -3,26 +3,33 @@ defmodule ChronoscopeWeb.IndexLive do
 
   alias Chronoscope.NTS
   alias Chronoscope.NTS.KeyEstablishmentResponse
+  alias Chronoscope.ViewActivator
 
   @topic Application.compile_env(:chronoscope, :nts_topic)
 
   def mount(_params, _session, socket) do
     ChronoscopeWeb.Endpoint.subscribe(@topic)
-    {:ok, assign(socket, %{clients: client_list()})}
+    {:ok, assign(socket, %{servers: server_list(), clients: client_list()})}
   end
 
   def handle_info(%{topic: @topic, event: "key-exchange", payload: client}, socket) do
+    if client.server in socket.assigns.servers do
       {:noreply, update(socket, :clients, &update_client(&1, client))}
+    else
+      {:noreply, socket}
+    end
   end
 
   defp update_client(client_list, client) do
-    # todo - use a map instead of list for fast lookups?
     Enum.map(client_list, &if(client.server == &1.server, do: client, else: &1))
   end
 
+  defp server_list() do
+    GenServer.call(ViewActivator, :get_nts_servers)
+  end
+
   defp client_list() do
-    Chronoscope.ViewActivator
-    |> GenServer.call(:get_nts_servers)
+    server_list()
     |> NTS.list_clients()
   end
 end

test/chronoscope_web/controllers/api/v1/gemini/connection_controller_test.exs

@@ -17,6 +17,42 @@ defmodule ChronoscopeWeb.API.V1.Gemini.ConnectionControllerTest do
       assert %{"error" => "missing host"} == response
     end
 
+    test "requires a host name value", %{conn: conn} do
+      response1 =
+        conn
+        |> get(~p"/api/v1/gemini/connect?host=")
+        |> json_response(400)
+
+      response2 =
+        conn
+        |> get(~p"/api/v1/gemini/connect?host=&port=1966")
+        |> json_response(400)
+
+      assert %{"error" => "empty host"} == response1
+      assert %{"error" => "empty host"} == response2
+    end
+
+    test "requires a non-blank host name", %{conn: conn} do
+      response1 =
+        conn
+        |> get(~p"/api/v1/gemini/connect?host=%20%20")
+        |> json_response(400)
+
+      response2 =
+        conn
+        |> get(~p"/api/v1/gemini/connect?host=%20%20&port=1966")
+        |> json_response(400)
+
+      response3 =
+        conn
+        |> get(~p"/api/v1/gemini/connect?host=%20%20&port=1966&path=/test")
+        |> json_response(400)
+
+      assert %{"error" => "empty host"} == response1
+      assert %{"error" => "empty host"} == response2
+      assert %{"error" => "empty host"} == response3
+    end
+
     test "uses the given host name", %{conn: conn} do
       GeminiMock
       |> expect(:connect, fn "localhost", 1965, "/" -> {:ok, %{status: :ok}} end)

test/chronoscope_web/controllers/api/v1/nts/key_establishment_controller_test.exs

@@ -17,6 +17,36 @@ defmodule ChronoscopeWeb.API.V1.NTS.KeyEstablishmentControllerTest do
       assert %{"error" => "missing host"} == response
     end
 
+    test "requires a host name value", %{conn: conn} do
+      response1 =
+        conn
+        |> get(~p"/api/v1/nts/key-establishment?host=")
+        |> json_response(400)
+
+      response2 =
+        conn
+        |> get(~p"/api/v1/nts/key-establishment?host=&port=4444")
+        |> json_response(400)
+
+      assert %{"error" => "empty host"} == response1
+      assert %{"error" => "empty host"} == response2
+    end
+
+    test "requires a non-blank host name", %{conn: conn} do
+      response1 =
+        conn
+        |> get(~p"/api/v1/nts/key-establishment?host=%20%20")
+        |> json_response(400)
+
+      response2 =
+        conn
+        |> get(~p"/api/v1/nts/key-establishment?host=%20%20&port=4444")
+        |> json_response(400)
+
+      assert %{"error" => "empty host"} == response1
+      assert %{"error" => "empty host"} == response2
+    end
+
     test "uses the given host name", %{conn: conn} do
       NTSMock
       |> expect(:key_establishment, fn "localhost", 4460 -> {:ok, %{status: :ok}} end)