diff --git a/app/controllers/tests_controller.rb b/app/controllers/tests_controller.rb
index 1526a689..42198aba 100644
--- a/app/controllers/tests_controller.rb
+++ b/app/controllers/tests_controller.rb
@@ -2,10 +2,10 @@ class TestsController < Simpler::Controller
 
   def index
     @time = Time.now
+    render 'tests/index'
   end
 
   def create
-
   end
 
 end
diff --git a/config.ru b/config.ru
index 3060cc20..95c42b75 100644
--- a/config.ru
+++ b/config.ru
@@ -1,3 +1,5 @@
 require_relative 'config/environment'
+require_relative 'lib/middleware/logger'
 
+use LoggerApp, log: File.expand_path('log/app.log', __dir__)
 run Simpler.application
diff --git a/config/routes.rb b/config/routes.rb
index 4a751251..6898f509 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -1,4 +1,4 @@
 Simpler.application.routes do
-  get '/tests', 'tests#index'
+  get '/tests/:id', 'tests#index'
   post '/tests', 'tests#create'
 end
diff --git a/lib/middleware/logger.rb b/lib/middleware/logger.rb
new file mode 100644
index 00000000..19479b54
--- /dev/null
+++ b/lib/middleware/logger.rb
@@ -0,0 +1,34 @@
+require 'logger'
+
+class LoggerApp
+  def initialize(app, **options)
+    @logger = Logger.new(options[:log])
+    @app = app
+  end
+
+  def call(env)
+    status, headers, response = @app.call(env)
+    @logger.info(log_struct(env))
+    [status, headers, response]
+  end
+
+  private
+
+  def log_struct(env)
+    request_method = env['REQUEST_METHOD']
+    request_path = env['PATH_INFO']
+    header_content_type = env['simpler.controller'].response.headers['Content-Type']
+    template = env['simpler.template']
+    controller = env['simpler.controller'].class
+    action = env['simpler.action']
+    request_params = env['simpler.controller'].request.params
+    response_status = env['simpler.controller'].response.status
+
+    <<~LOG_STRUCT
+      \nRequest: #{request_method} #{request_path}
+      Handler: #{controller}##{action}
+      Parameters: #{request_params}
+      Response: #{response_status} [#{header_content_type}] #{template}
+    LOG_STRUCT
+  end
+end
diff --git a/lib/simpler/application.rb b/lib/simpler/application.rb
index 711946a9..8dec8ec8 100644
--- a/lib/simpler/application.rb
+++ b/lib/simpler/application.rb
@@ -28,7 +28,15 @@ def routes(&block)
 
     def call(env)
       route = @router.route_for(env)
+
+      return [404, {'Content-Type' => 'text/plain'}, ['Path not found']] unless route
+
+      env['simpler.key_path_param'] = route.path_param if route.path_param
+
+      @router.set_value_path_param(env, route.path) if route.path_param
+
       controller = route.controller.new(env)
+
       action = route.action
 
       make_response(controller, action)
diff --git a/lib/simpler/controller.rb b/lib/simpler/controller.rb
index 9383b035..46ead5d7 100644
--- a/lib/simpler/controller.rb
+++ b/lib/simpler/controller.rb
@@ -1,9 +1,10 @@
 require_relative 'view'
-
+require 'byebug'
 module Simpler
   class Controller
+    PLAIN_TEXT_CONTENT_TYPE = "text/plain".freeze
 
-    attr_reader :name, :request, :response
+    attr_reader :name, :request, :response, :params
 
     def initialize(env)
       @name = extract_name
@@ -15,6 +16,7 @@ def make_response(action)
       @request.env['simpler.controller'] = self
       @request.env['simpler.action'] = action
 
+      set_params
       set_default_headers
       send(action)
       write_response
@@ -22,6 +24,10 @@ def make_response(action)
       @response.finish
     end
 
+    def params
+      @request.params
+    end
+
     private
 
     def extract_name
@@ -33,21 +39,48 @@ def set_default_headers
     end
 
     def write_response
-      body = render_body
+      unless content_type_text_plain?
+        body = render_body
 
-      @response.write(body)
+        @response.write(body)
+      end
     end
 
     def render_body
       View.new(@request.env).render(binding)
     end
 
-    def params
-      @request.params
+    def set_params
+      key_param = @request.env['simpler.key_path_param']
+      value_param = @request.env['simpler.value_path_param']
+
+      if key_param && value_param
+        @request.params[key_param] = value_param
+      end
+    end
+
+    def render(template = nil, **options)
+      if options.has_key?(:plain)
+        @response['Content-Type'] = 'text/plain'
+
+        plain_text = options[:plain]
+
+        @response.body = [plain_text]
+      else
+        @request.env['simpler.template'] = template
+      end
+    end
+
+    def status(code)
+      @response.status = code
+    end
+
+    def headers
+      @response.headers
     end
 
-    def render(template)
-      @request.env['simpler.template'] = template
+    def content_type_text_plain?
+      @response['Content-Type'] == PLAIN_TEXT_CONTENT_TYPE
     end
 
   end
diff --git a/lib/simpler/router.rb b/lib/simpler/router.rb
index 14b3415c..236af4ad 100644
--- a/lib/simpler/router.rb
+++ b/lib/simpler/router.rb
@@ -22,17 +22,35 @@ def route_for(env)
       @routes.find { |route| route.match?(method, path) }
     end
 
+    def set_value_path_param(env, path)
+      value = env['PATH_INFO'].match(path).post_match
+
+      env['simpler.value_path_param'] = value
+    end
+
     private
 
     def add_route(method, path, route_point)
       route_point = route_point.split('#')
+
+      path_route, path_param = split_param_from_path(path)
+
       controller = controller_from_string(route_point[0])
+
       action = route_point[1]
-      route = Route.new(method, path, controller, action)
+
+      route = Route.new(method, path_route, controller, action, path_param)
 
       @routes.push(route)
     end
 
+    def split_param_from_path(path)
+      path_route = path.match(":")&.pre_match || path
+      path_param = path.match(":")&.post_match || nil
+
+      [path_route, path_param]
+    end
+
     def controller_from_string(controller_name)
       Object.const_get("#{controller_name.capitalize}Controller")
     end
diff --git a/lib/simpler/router/route.rb b/lib/simpler/router/route.rb
index 4c66b4b7..bb0831a6 100644
--- a/lib/simpler/router/route.rb
+++ b/lib/simpler/router/route.rb
@@ -2,13 +2,14 @@ module Simpler
   class Router
     class Route
 
-      attr_reader :controller, :action
+      attr_reader :controller, :action, :path_param, :path
 
-      def initialize(method, path, controller, action)
+      def initialize(method, path, controller, action, path_param = nil)
         @method = method
         @path = path
         @controller = controller
         @action = action
+        @path_param = path_param
       end
 
       def match?(method, path)
diff --git a/log/app.log b/log/app.log
new file mode 100644
index 00000000..ae3a5968
--- /dev/null
+++ b/log/app.log
@@ -0,0 +1,13 @@
+# Logfile created on 2025-04-19 23:25:38 +0300 by logger.rb/v1.7.0
+I, [2025-04-19T23:25:42.834972 #21015]  INFO -- : 
+Request: GET /tests/100
+Handler: TestsController#index
+Parameters: {"id"=>"100"}
+Response: 200 text/html tests/index
+
+I, [2025-04-19T23:31:39.878967 #21788]  INFO -- : 
+Request: GET /tests/100
+Handler: TestsController#index
+Parameters: {"id"=>"100"}
+Response: 200 [text/html] tests/index
+