Using Python and XMPP to build a decentralized social network J er - - PowerPoint PPT Presentation

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Using Python and XMPP to build a decentralized social network J er - - PowerPoint PPT Presentation

Aug 31, 2023 205 likes •542 views

Using Python and XMPP to build a decentralized social network J er ome Poisson (Goffi) FOSDEM Saturday 30th January 2016 Some words about the project a lot of features other interfaces about the technologies global architecture

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Using Python and XMPP to build a decentralized social network

J´ erˆ

  • me Poisson (Goffi)

FOSDEM

Saturday 30th January 2016

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Some words about the project a lot of features

  • ther interfaces

about the technologies global architecture Python ! about the choice of Python some advantages Twisted Urwid Pyjamas A New Hope Things we have learned Salut ` a Vous

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Some words about the project

Libervia/Salut ` a Toi is a Multipurpose, multi frontend communication tool

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Some words about the project

◮ project started in 2008/2009 ◮ Social Contract

http://salut-a-toi.org/social_contract.html

◮ non profit association

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Outline

Some words about the project a lot of features

  • ther interfaces

about the technologies global architecture Python ! about the choice of Python some advantages Twisted Urwid Pyjamas A New Hope Things we have learned Salut ` a Vous

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Some words about the project

◮ instant messaging (of course) ◮ end 2 end encryption ◮ P2P file sharing ◮ blog engine (decentralized !) ◮ lot of experimentations

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Outline

Some words about the project a lot of features

  • ther interfaces

about the technologies global architecture Python ! about the choice of Python some advantages Twisted Urwid Pyjamas A New Hope Things we have learned Salut ` a Vous

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  • ther interfaces

◮ don’t reinvent the wheel ◮ we use standards (XMPP) ◮ factorization

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Outline

Some words about the project a lot of features

  • ther interfaces

about the technologies global architecture Python ! about the choice of Python some advantages Twisted Urwid Pyjamas A New Hope Things we have learned Salut ` a Vous

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Python !

we use Python everywhere we can

◮ Twisted (backend, web frontend) ◮ curses Urwid (console frontend) ◮ Pyjamas (web frontend) ◮ WxWidgets Kivy to be done ◮ Jinja (web frontend)

. . . and sometime we don’t

◮ Qt/C++ (Desktop frontend)

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Outline

Some words about the project a lot of features

  • ther interfaces

about the technologies global architecture Python ! about the choice of Python some advantages Twisted Urwid Pyjamas A New Hope Things we have learned Salut ` a Vous

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about the choice of Python

◮ speed (execution)

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about the choice of Python

◮ speed (execution)

◮ pypy ◮ cython ◮ C/C++ inclusion

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about the choice of Python

◮ speed (execution)

◮ pypy ◮ cython ◮ C/C++ inclusion

◮ speed (development) ◮ popular (libraries) ◮ popular (similar projects) ◮ popular (tools)

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tools

◮ Mercurial ◮ BuildBot ◮ D-Feet

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Outline

Some words about the project a lot of features

  • ther interfaces

about the technologies global architecture Python ! about the choice of Python some advantages Twisted Urwid Pyjamas A New Hope Things we have learned Salut ` a Vous

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some advantages

◮ debugging (pudb & ipdb) ◮ stability (Python & Twisted) ◮ workaround/monkey patching ◮ standard library (re, argparse, dom, urlparse/urllib) ◮ Python is fun !

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Twisted

◮ asynchronous ◮ huge framework ◮ well thought abstractions ◮ test driven development

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Twisted

◮ Deferred

def fosdemTalkCb ( s e l f , r e s u l t ) : p r i n t u”OK! {}” . format ( r e s u l t ) def fosdemTalkEb ( s e l f , f a i l u r e ) : p r i n t u” D i s a s t e r ! {}” . format ( f a i l u r e ) d = getFosdemTalkOpinion () d . addCallbacks ( s e l f . fosdemTalkCb , fosdemTalkEb )

◮ inline callbacks

@defer . i n l i n e C a l l b a c k s def fosdemTalkPoll ( s e l f ) : try :

  • p i n i o n = y i e l d

getFosdemTalkOpinion () except BadTalkException as f a i l u r e : p r i n t u” D i s a s t e r ! {}” . format ( f a i l u r e ) e l s e : p r i n t u”OK! {}” . format ( o p i n i o n )

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Urwid

◮ D-Bus integration ◮ good widgets set ◮ customization ◮ lot of nice stuff (resizing, keys, etc) ◮ it just works !

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Pyjamas

◮ Python −

→ JavaScript transpiler

◮ very active at the time ◮ a GWT port ◮ handle browsers incompatibilities ◮ main advantages for us :

◮ factorization ◮ no context switch

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Pyjamas

  • but. . .

◮ it’s nearly Python, but it’s not Python ◮ heavy and ugly pages (code) ◮ difficult to debug ◮ no luck to move to Python 3 ◮ project hijacked ◮ and now dead

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Outline

Some words about the project a lot of features

  • ther interfaces

about the technologies global architecture Python ! about the choice of Python some advantages Twisted Urwid Pyjamas A New Hope Things we have learned Salut ` a Vous

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A New Hope

Brython

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A New Hope

Brython

◮ not a compiler, an interpreter ◮ Python 3 ◮ Python test suite ◮ active ◮ debugger ◮ stay close to HTML

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Things we have learned

◮ stay focused ◮ new technologies can wait ◮ look for the community ◮ and the stability

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Outline

Some words about the project a lot of features

  • ther interfaces

about the technologies global architecture Python ! about the choice of Python some advantages Twisted Urwid Pyjamas A New Hope Things we have learned Salut ` a Vous

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Thanks for your attention

◮ http://salut-a-toi.org (official website) ◮ https://www.libervia.org (d´

emo)

◮ goffi@goffi.org (courriel) ◮ goffi@jabber.fr (jid)

  • r meet me in Prague !