ningle
2024-10-12
Super micro framework for Common Lisp.
ningle
"ningle" is a lightweight web application framework for Common Lisp.
Usage
(defvar *app* (make-instance 'ningle:app)) (setf (ningle:route *app* "/") "Welcome to ningle!") (setf (ningle:route *app* "/login" :method :POST) #'(lambda (params) (if (authorize (cdr (assoc "username" params :test #'string=)) (cdr (assoc "password" params :test #'string=))) "Authorized!" "Failed...Try again."))) (clack:clackup *app*)
Now you can access to http://localhost:5000/ and then ningle should show you "Welcome to ningle!".
Installation
(ql:quickload :ningle)
Description
ningle is a fork project of Caveman. ningle doesn't require you to generate a project skeleton.
As this is a thin framework, you need to have subtle knowledge about Clack. It is a server interface ningle bases on.
Getting started
Routing
ningle has the Sinatra-like routing system.
;; GET request (default) (setf (ningle:route *app* "/" :method :GET) ...) ;; POST request (setf (ningle:route *app* "/" :method :POST) ...) ;; PUT request (setf (ningle:route *app* "/" :method :PUT) ...) ;; DELETE request (setf (ningle:route *app* "/" :method :DELETE) ...) ;; OPTIONS request (setf (ningle:route *app* "/" :method :OPTIONS) ...)
Route pattern may contain "keyword" to put the value into the argument.
(setf (ningle:route *app* "/hello/:name") #'(lambda (params) (format nil "Hello, ~A" (cdr (assoc :name params)))))
The above controller will be invoked when you access to "/hello/Eitaro" or "/hello/Tomohiro", and then (cdr (assoc :name params)) will be "Eitaro" and "Tomohiro".
Route patterns may also contain "wildcard" parameters. They are accessible by (assoc :splat params).
(setf (ningle:route *app* "/say/*/to/*") #'(lambda (params) ; matches /say/hello/to/world (cdr (assoc :splat params)) ;=> ("hello" "world") )) (setf (ningle:route *app* "/download/*.*") #'(lambda (params) ; matches /download/path/to/file.xml (cdr (assoc :splat params)) ;=> ("path/to/file" "xml") ))
Route matching with Regular Expressions:
(setf (ningle:route *app* "/hello/([\\w]+)" :regexp t) #'(lambda (params) (format nil "Hello, ~A!" (first (cdr (assoc :captures params))))))
Requirements
Routes may include a variety of matching conditions, such as the Accept:
(setf (ningle:route *app* "/" :accept '("text/html" "text/xml")) #'(lambda (params) (declare (ignore params)) "<html><body>Hello, World!</body></html>")) (setf (ningle:route *app* "/" :accept "text/plain") #'(lambda (params) (declare (ignore params)) "Hello, World!"))
You can easily define your own conditions:
(setf (ningle:requirement *app* :probability) #'(lambda (value) (<= (random 100) value))) (setf (ningle:route *app* "/win_a_car" :probability 10) #'(lambda (params) (declare (ignore params)) "You won!")) (setf (ningle:route *app* "/win_a_car") #'(lambda (params) (declare (ignore params)) "Sorry, you lost."))
Request & Response
ningle provides two special variables named *request* and *response*. They will be bound to an instance Lack.Request and Lack.Response for each request.
For example, by using them, you can change the response status code, Content-Type or something like that in each controllers.
(setf (lack.response:response-headers *response*) (append (lack.response:response-headers *response*) (list :content-type "application/json"))) (setf (lack.response:response-headers *response*) (append (lack.response:response-headers *response*) (list :access-control-allow-origin "*"))) (setf (lack.response:response-status *response*) 201)
Context
ningle provides a useful function named context. It is an accessor to an internal hash table.
(setf (context :database) (dbi:connect :mysql :database-name "test-db" :username "nobody" :password "nobody")) (context :database) ;;=> #<DBD.MYSQL:<DBD-MYSQL-CONNECTION> #x3020013D1C6D>
Using Session
ningle doesn't provide Session system in the core, but recommends to use Lack.Middleware.Session with Lack.Builder.
(import 'lack.builder:builder) (clack:clackup (builder :session *app*))
Of course, you can use other Lack Middlewares with ningle.
See Also
Author
- Eitaro Fukamachi ([email protected])
Copyright
Copyright (c) 2012-2014 Eitaro Fukamachi ([email protected])
License
Licensed under the LLGPL License.