About Clack

About Clack Hatena Co., Ltd. Eitarow Fukamachi Oct 24, 2012 International Lisp Conference @ Kyoto, Japan

About Me• Eitarow FUKAMACHI (≒ eight arrow)• Live in Kyoto, Japan• Common Lisp user since 2010• Attended ILC2010 @ Reno• (I’m using Clozure CL)• Web application developer at Hatena Co., Ltd.• Using Perl at work

Products• Clack • CL-Markup• Caveman • CL-Project• ningle • Shelly• CL-TEST-MORE etc.• CL-DBI See github.com/fukamachi

What’s “Clack”?

What’s Clack?• Web application environment • Foundation for Web application framework• Equivalent to... • Python’s WSGI, Ruby’s Rack, Perl’s Plack/PSGI and Clojure’s Ring

What’s Clack?• Web application environment • Foundation for Web application framework• Equivalent to... • Python’s WSGI, Ruby’s Rack, Perl’s Plack/PSGI and Clojure’s Ring• Abstract HTTP into a simple API (Portability)• Share code across web frameworks (Reusability)

Clack’s“Portability”

“Portability”• Abstract a web server ※Application includes Web frameworks.

“Portability”(clack:clackup app);-> Hunchentoot server is started.; Listening on localhost:5000.; # #x30200A102B3D

“Portability”(clack:clackup app);-> Hunchentoot server is started.; Listening on localhost:5000.; # #x30200A102B3D(clack:clackup app :server :hunchentoot) ;; default(clack:clackup app :server :fcgi)(clack:clackup app :server :apache)

Clack’s“Reusability”

“Reusability”• Application takes Request and returns Response

“Reusability”• Application takes Request and returns Response• Extension mechanism called “Middleware”• “Middleware” can be reused

“Show me how to use it!”

Example 1“Hello, World!”

Example: Hello, World!(defun app (env) (declare (ignore env)) (200 (:content-type "text/plain") ("Hello, World!")))(clack:clackup #app)

Example: Hello, World!(defun app (env) (declare (ignore env)) (200 ‘(200 (:content-type "text/plain") “text/plain”) ("Hello, World!"))) (“Hello, World!”))(clack:clackup #app)

Example: Hello, World! (defun app (env) (declare (ignore env)) (200 ‘(200(:request-method :GET :script-name "" (:content-type "text/plain") “text/plain”) :path-info "/sns/member" ("Hello, World!"))) (“Hello, World!”)) :query-string "id=3":server-name "localhost":server-port 5000 (clack:clackup #app):request-uri "/sns/member?id=3":server-protocol :HTTP/1.1:http-user-agent "Mozilla/5.0 (Macintosh...":remote-addr "127.0.0.1":remote-port 26077:http-referer nil:http-host "localhost:5000":http-cookies nil)

Example: Hello, World!

Example 2“Conditional ﬂow”

Example: Conditional ﬂow(defun app (env) (cond ((string= (getf env :path-info) "/favicon.ico") (200 (:content-type "image/x-icon") #p"/path/to/favicon.ico")) ((string= (getf env :path-info) "/") (200 (:content-type "text/html") ("Hello again"))) (t (404 (:content-type "text/plain") ("Not found")))))(clack:clackup #app)

Example 3“Basic Auth”

Example: Basic Auth(import ‘(clack.builder:builder clack.middleware.auth.basic:<clack-middleware-auth-basic>))(defun app (env) (declare (ignore env)) (200 (:content-type "text/plain") ("Hello, World!")))(clack:clackup (builder (<clack-middleware-auth-basic> :authenticator (lambda (user pass) (and (string= user "johnmccarthy") (string= password "password")))) #app))

Example: Basic Auth

Example 4“Static ﬁles”

Example: Static ﬁles(import ‘(clack.builder:builder clack.middleware.static:<clack-middleware-static>))(defun app (req) (declare (ignore req)) (200 (:content-type "text/plain") ("Hello, World!")))(clack:clackup (builder (<clack-middleware-static> :path (lambda (path) (when (ppcre:scan "^/(?:images|css|js)/" path) (ppcre:regex-replace "^/[^/]+" path ""))) :root #p"static/") #app))

What are the beneﬁts of using Clack?

Clack allows you to:• If you’re a “Web framework developer”... • Clack provides server interfaces. • Reuse code from other web frameworks.

Clack allows you to:• If you’re a “Web framework developer”... • Clack provides server interfaces. • Reuse code from other web frameworks.• If you’re a “Web application engineer”... • Reuse code in your projects • Extensible

Frameworks

Frameworks• Caveman • A Sinatra-like micro framework• ningle • A really micro framework

Frameworks• Caveman (fukamachi.github.com/caveman/) • A Sinatra-like micro framework• ningle (fukamachi.github.com/ningle/) • A really micro framework

Future Work

Future Work• More Middlewares• More Servers • non-blocking web server? • preforking web server?

Future Work• More Middlewares• More Servers • non-blocking web server? • preforking web server?• More Frameworks • Ruby on Rails?

THE ENDThank you for listening

Maybe we still have time. Any questions in easy English? To Japanese speakers: Please translate a question for me if it looks I dont understand it. 僕が質問を理解できていなさそうだったら翻訳してください＞＜

http://clacklisp.org	4163
http://d.hatena.ne.jp	2056
https://twitter.com	19
http://translate.googleusercontent.com	12
https://si0.twimg.com	3
http://twitter.com	1
http://honyaku.yahoofs.jp	1
http://webcache.googleusercontent.com	1

About Clack

by fukamachi on Oct 24, 2012

Accessibility

Categories

Upload Details

Usage Rights

8 Embeds 6,256

Statistics

About Clack Presentation Transcript