add some URLs that give us request debug info

Gemfile

@@ -37,7 +37,6 @@ group :development do
 end
 
 group :production do
-  gem "cloudflare-rails", "~> 6.2"
   gem "honeybadger", "~> 5.26"
   gem "lograge", "~> 0.14.0"
   gem "rack-attack", "~> 6.7"
@@ -47,6 +46,7 @@ gem "better_html", "~> 2.1"
 gem "bootsnap", "~> 1.18", require: false
 gem "brotli", "~> 0.6.0"
 gem "cloudflare", "~> 4.4"
+gem "cloudflare-rails", "~> 6.2"
 gem "data_migrate", "~> 11.2"
 gem "importmap-rails", "~> 2.0"
 gem "jb", "~> 0.8.2"

app/controllers/requests_controller.rb

@@ -0,0 +1,25 @@
+class RequestsController < ApplicationController
+  def show
+    case params[:id]
+    when "error"
+      raise "oh no"
+    when "headers"
+      render plain: request.headers.to_h.map { |k, v| "#{k}: #{v}" }.sort_by(&:first).join("\n")
+    when "cloudflare"
+      render plain: JSON.pretty_generate(
+        "Rails.configuration.cloudflare": Rails.configuration.cloudflare,
+        "Importer.cloudflare_ips": CloudflareRails::Importer.cloudflare_ips,
+        "CloudflareRails::FallbackIps::IPS_V4": CloudflareRails::FallbackIps::IPS_V4,
+        "CloudflareRails::FallbackIps::IPS_V6": CloudflareRails::FallbackIps::IPS_V6,
+        "request.headers['REMOTE_ADDR']": request.headers["REMOTE_ADDR"],
+        "request.forwarded_for": request.forwarded_for,
+        "request.remote_ip": request.remote_ip,
+        "request.ip": request.ip,
+        "request.local?": request.local?,
+        "request.cloudflare?": request.cloudflare?
+      )
+    else
+      head :not_found
+    end
+  end
+end

config/routes.rb

@@ -6,6 +6,7 @@
     end
   end
   resources :stats, only: [:index]
+  resources :requests, only: [:show]
 
   get "up" => "rails/health#show"