Add log macro

spec/logger_spec.cr

@@ -18,6 +18,7 @@ describe "Logger" do
     logger = Kemal::Logger.new
     logger.handler.should be_a File
   end
+
   it "writes to a file in production" do
     config = Kemal.config
     config.env = "production"

src/kemal/macros.cr

@@ -34,3 +34,10 @@ end
 macro public_folder(path)
   Kemal.config.public_folder = {{path}}
 end
+
+# Logs to output stream.
+# development: STDOUT in
+# production: kemal.log
+macro log(message)
+  Kemal::Logger::INSTANCE.write "#{{{message}}}\n"
+end

src/kemal/middleware/http_basic_auth.cr

@@ -10,6 +10,8 @@ module Kemal::Middleware
   class HTTPBasicAuth < HTTP::Handler
     BASIC                 = "Basic"
     AUTH                  = "Authorization"
+    AUTH_MESSAGE          = "Could not verify your access level for that URL.\nYou have to login with proper credentials"
+    HEADER_LOGIN_REQUIRED = "Basic realm=\"Login Required\""
 
     def initialize(@username, @password)
     end
@@ -23,8 +25,8 @@ module Kemal::Middleware
         end
       end
       headers = HTTP::Headers.new
-      headers["WWW-Authenticate"] = "Basic realm=\"Login Required\""
-      HTTP::Response.new(401, "Could not verify your access level for that URL.\nYou have to login with proper credentials", headers, nil, "HTTP/1.1", nil)
+      headers["WWW-Authenticate"] = HEADER_LOGIN_REQUIRED
+      HTTP::Response.new(401, AUTH_MESSAGE, headers, nil, "HTTP/1.1", nil)
     end
 
     def authorized?(value)