From 67c7074bfe9f088d77f5dc3dac0fe5ebe4169956 Mon Sep 17 00:00:00 2001
From: Andre Arko <andre@arko.net>
Date: Fri, 13 Dec 2024 00:32:38 -0800
Subject: [PATCH] add some URLs that give us request debug info

---
 Gemfile                                |  2 +-
 app/controllers/requests_controller.rb | 25 +++++++++++++++++++++++++
 config/routes.rb                       |  1 +
 3 files changed, 27 insertions(+), 1 deletion(-)
 create mode 100644 app/controllers/requests_controller.rb

diff --git a/Gemfile b/Gemfile
index 784c0e29..a53ca2e3 100644
--- a/Gemfile
+++ b/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"
diff --git a/app/controllers/requests_controller.rb b/app/controllers/requests_controller.rb
new file mode 100644
index 00000000..4a04826f
--- /dev/null
+++ b/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
diff --git a/config/routes.rb b/config/routes.rb
index 27cc8101..43d235f4 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -6,6 +6,7 @@
     end
   end
   resources :stats, only: [:index]
+  resources :requests, only: [:show]
 
   get "up" => "rails/health#show"