feat: expose some request info to controllers

Author: swiknaba

lib/kirei/controller.rb

@@ -40,5 +40,38 @@ def self.after(&block)
       @after_hooks ||= T.let(Set.new, Routing::NilableHooksType)
       @after_hooks.add(block) if block
     end
+
+    sig { returns(String) }
+    def req_host
+      env.fetch("HTTP_HOST")
+    end
+
+    sig { returns(String) }
+    def req_domain
+      T.must(req_host.split(":").first).split(".").last(2).join(".")
+    end
+
+    sig { returns(T.nilable(String)) }
+    def req_subdomain
+      parts = T.must(req_host.split(":").first).split(".")
+      return if parts.size <= 2
+
+      T.must(parts[0..-3]).join(".")
+    end
+
+    sig { returns(Integer) }
+    def req_port
+      env.fetch("SERVER_PORT")&.to_i
+    end
+
+    sig { returns(T::Boolean) }
+    def req_ssl?
+      env.fetch("HTTPS", env.fetch("rack.url_scheme", "http")) == "https"
+    end
+
+    sig { returns(T::Hash[String, T.untyped]) }
+    private def env
+      T.cast(@router.current_env, T::Hash[String, T.untyped])
+    end
   end
 end

lib/kirei/routing/base.rb

@@ -38,6 +38,8 @@ def call(env)
         route = router.get(http_verb, req_path)
         return NOT_FOUND if route.nil?
 
+        router.current_env = env # expose the env to the controller
+
         params = case route.verb
                  when Verb::GET
                    query = T.cast(env.fetch("QUERY_STRING"), String)

lib/kirei/routing/router.rb

@@ -25,6 +25,9 @@ class Router
         T::Hash[String, Route]
       end
 
+      sig { returns(T.nilable(T::Hash[String, T.untyped])) }
+      attr_accessor :current_env
+
       sig { void }
       def initialize
         @routes = T.let({}, RoutesHash)

spec/test_app/Gemfile.lock

@@ -2,6 +2,7 @@ PATH
   remote: ../..
   specs:
     kirei (0.6.3)
+      logger (~> 1.5)
       oj (~> 3.0)
       pg (~> 1.0)
       rack (~> 3.0)

spec/test_app/app/controllers/health.rb

@@ -7,7 +7,17 @@ class Health < Base
     def livez
       TestApp.config.logger.info("Health check")
       TestApp.config.logger.info(params.inspect)
-      render(TestApp.version, status: 200)
+
+      info = {
+        "version" => TestApp.version,
+        "req_host" => req_host,
+        "req_domain" => req_domain,
+        "req_subdomain" => req_subdomain,
+        "req_port" => req_port,
+        "req_ssl" => req_ssl?,
+      }
+
+      render(Oj.dump(info), status: 200)
     end
   end
 end