Seaside - The Revenge of Smalltalk

The Revenge of Smalltalk London Geek Nights July 6, 2009

Lukas Renggli Academics PhD Student, University of Bern Open-Source Core-developer of Seaside Author of Magritte and Pier Industry Independent Software Consultant

Agenda Flow Continuations Components Objects Security Closures Applications Debugger

Natural Flow Source: stock.xchng, Asif Akbar

is different

3 user interactions

3 lines of code

value1 := self request: ‘First Number’.

value1 := self request: ‘First Number’. value2 := self request: ‘Second Number’.

value1 := self request: ‘First Number’. value2 := self request: ‘Second Number’. self inform: value1 + value2.

D SL value1 := self request: ‘First Number’. I t’sa value2 := self request: ‘Second Number’. self inform: value1 + value2.

It’s j u st value1 := self request: ‘First Number’. S m a l lt a l k value2 := self request: ‘Second Number’. self inform: value1 + value2.

No request parsing

No string ﬁddling

No state machines

Reusable Components Source: stock.xchng, Lynne Lancaster

Reuseable

Persistent

Model View Controller Model, View, Controller

Valid Source: stock.xchng, Al Nakib

CSS Designer

XHTML Developer & Seaside

DRY It ’s a D S L

It’s j u st DRY S m a l lt a l k

3 Source: stock.xchng, Colin Brough Default Secure by

Cross Site Scripting Source: stock.xchng, Afonso Lima

Output is encoded by default

Replay Attacks Source: stock.xchng, Afonso Lima

Session _s=Ru8ZKgqjy0uDX3kf 96-bit

Page _k=K5EQyqKE 48-bit

Parameter Tampering Source: stock.xchng, Afonso Lima

Names are generated automatically

Names are bound to functions

No manual request parsing

html submitButton ! callback: [ self inform: ‘Hey’ ]; ! with: ‘Click Here’

html submitButton a D S L It ’s ! callback: [ self inform: ‘Hey’ ]; ! with: ‘Click Here’

It’s j u st html submitButton S m a l lt a l k ! callback: [ self inform: ‘Hey’ ]; ! with: ‘Click Here’

Web 2.0 Source: Flickr, Benjamin Jackson

Source: Flickr, psrman's

Comet Source: Flickr, psrman's

a D S L It ’s

It’s j u st S m a l lt a l k

5 Applications Source: stock.xchng, Steve Woods

In productive use since 2002

Seaside

MIT License

External Interface Support XML Support enables XML–Smalltalk object Platform 256MB RAM, 400MB disk mapping, includes a server interface via XML 0MHz PC, 128MB RAM, 400MB disk request handlers and reading of remote resources station or server, 64MB RAM, 200MB disk via TCP sockets using HTTP requests m/6000, POWERStation OLE Support enables an application to use OLE erver, 128MB RAM, 400MB disk clients and custom control services. 1a Library Manager Domino Connection allows an application to 4.2 or 5.1 retrieve and work with Domino documents as well p 4.0 + FP11 as access Notes mail system. p Server for e-Business ME - EMADMIN only 2000, 2000 Server, d Server XP Professional Server 2003 Download a risk-free trial copy: Vista Business, Enterprise, www.instantiations.com/VAST/download te is Version 8 or 9 rsion 11.0 or 11i on 5.1, 5.2 or 5.3 inux 9 and Advance Server 2.1 erprise 10 visit www.instantiations.com/VAST Build Quality Software WindowBuilder are trademarks of Instantiations. All other trademarks mentioned are the property of their respective owners.

www.seaside.st

www.swa.hpi.uni-potsdam.de/seaside/tutorial/

www.seaside.st www.lukas-renggli.ch

Seaside - The Revenge of Smalltalk

by Lukas Renggli on Jul 08, 2009

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