Fix net/http adapter and an issue with nil responses (#23)

* Update Gemfile for Rails 7

* Fix IoMonitor::NetHttpAdapterPatch to avoid collisions with other tools, e.g. Faraday

* Add test to cover an issue with nil response

* Fix an issue with nil responses

* Restore Gemfile

Author: SSDany

lib/io_monitor/controller.rb

@@ -37,7 +37,7 @@ def append_info_to_payload(payload)
         data[source] = aggregator.get(source)
       end
 
-      data[:response] = payload[:response].body.bytesize
+      data[:response] = payload[:response]&.body&.bytesize || 0
     end
 
     private

lib/io_monitor/patches/net_http_adapter_patch.rb

@@ -3,8 +3,8 @@
 module IoMonitor
   module NetHttpAdapterPatch
     def request(*args, &block)
-      super do |response|
-        if response.body && IoMonitor.aggregator.active?
+      super.tap do |response|
+        if response&.body && IoMonitor.aggregator.active?
           IoMonitor.aggregator.increment(NetHttpAdapter.kind, response.body.bytesize)
         end
       end

spec/dummy/app/controllers/fake_controller.rb

@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+class FakeController < ApplicationController
+  include IoMonitor::Controller
+
+  def fake
+    raise ActionController::RoutingError.new("Fake")
+  end
+end

spec/dummy/config/routes.rb

@@ -1,4 +1,5 @@
 # frozen_string_literal: true
 
 Rails.application.routes.draw do
+  get "/fake", to: "fake#fake"
 end

spec/io_monitor/controller_spec.rb

@@ -133,3 +133,11 @@ def show
     end
   end
 end
+
+RSpec.describe "when response is nil", type: :request do
+  it "does not fail" do
+    get "/fake"
+
+    expect(response).to be_not_found
+  end
+end