html/http e a web
TRANSCRIPT
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HTML/HTTPe a Web
Willian Massami Watanabe
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Objetivo
Analisar a evolução das tecnologias web
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Sumário
• HTML e HTTP
• Web 2.0
• HTML5
• Impactos na Engenharia Web
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HTML e HTTP
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HTML e HTTP
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HTML e HTTP
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HTML e HTTP
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HTML e HTTP
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HTML e HTTP
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HTML e HTTP
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HTML e HTTP
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HTML e HTTP
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HTML e HTTP
WWW
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HTML e HTTP
WWW
Como isso começou?
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WWW
HTML e HTTP
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HTML e HTTP
WWW
Tim Berners Lee
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HTML e HTTP
Tim Berners Lee
1989 Hoje
HTML
HTTP
Browser
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HTML e HTTP1989 Hoje
1945: Memory Extension
1960s: Hypertext1974: Internet
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HTML e HTTP1989 Hoje
1945: Memory Extension
1960s: Hypertext1974: Internet
MemexVannevar Bush
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HTML e HTTP1989 Hoje
1945: Memory Extension
1960s: Hypertext1974: Internet
Hypertext
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HTML e HTTP
Tim Berners Lee
1989 Hoje
HTML
HTTP
Browser
16
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HTML e HTTP
Tim Berners Lee
1989 Hoje
HTML
HTTP
Browser
Hipertexto
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HTML e HTTP
HTML
HyperText Markup Language: para organizar o conhecimento
Tim Berners Lee18
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HTML e HTTP1989 Hoje
1945: Memory Extension
1960s: Hypertext1974: Internet
Internet
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HTML e HTTP
Internet
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HTML e HTTP
Internet
AplicaçãoApresentação
SessãoTransporte
RedeEnlaceFísico
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HTML e HTTP
Internet
AplicaçãoApresentação
SessãoTransporte
RedeEnlaceFísico
HTTP
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HTML e HTTP
Tim Berners Lee
1989 Hoje
HTML
HTTP
Browser
Protocolo
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HTML e HTTP
Tim Berners Lee
1989 Hoje
HTML
HTTP
Browser Interface
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HTML
HTTP
Browser
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HTML e HTTP1989 Hoje
HTML
HTTP
Browser
WWW
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HTML e HTTP
Tim Berners Lee
Por quê?
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HTML e HTTP
Tim Berners Lee
Frustration
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HTML e HTTP
Tim Berners Lee
Frustration
Documentos
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HTML e HTTP
Tim Berners Lee
Frustration
Documentos
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HTML e HTTP
Tim Berners Lee
Frustration
Documentos
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HTML e HTTP
Tim Berners Lee
Frustration
Documentos
!= !=
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HTML e HTTP
Tim Berners Lee
Hipertexto não foi a inovação
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HTML
HTTP
Browser
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HTML
HTTP
Browser
Documentos Distribuídos
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HTML e HTTP
Interoperabilidade
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HTML e HTTP1989 Hoje
HTML
HTTP
Browser
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HTML e HTTP1989 Hoje
HTML
HTTP
Browser
HTML
Hoje
JavaScript CSS
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HTML e HTTP1989 Hoje
HTML
HTTP
Browser
Hoje
HTML
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HTML e HTTP1989 Hoje
HTML
HTTP
Browser
Hoje
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HTML e HTTP1989 Hoje
HTML
HTTP
Browser
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Web 2.0
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Web 2.0
Web como plataforma
Web humana
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Web 2.0
Web humana
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Web 2.0
Web humana
HTMLAutor de conteúdo
Usuários
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Web 2.0
Web humana
HTML Usuários
Usuário participando da autoria de conteúdo
Redes sociais como Orkut, Twitter, ...45
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Web 2.0
Web humana
HTML Usuários
Usabilidade
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• Melhorar a experiência do usuário
• Satisfação• Eficiência• Eficácia
Web 2.0Usabilidade
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Web 2.0Usabilidade
Ajax
Estilo arquitetural composto por diferentes idéias e tenologias associadas (Mahemoff, 2006)
Emprego de tecnologias abertas com base em padrões arquiteturais da Internet e da Web
(Garrett, 2005)(Fraternali et al., 2010)48
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Web 2.0
Ajax
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Web 2.0
JavaScript e DHTML
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Web 2.0
AjaxJavaScript
HTML Events
DOM HTMLDHTML
CSS
HTML
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Web 2.0
JavaScript
Formatos de comunicação de dados
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Web 2.0
AjaxJavaScript
HTML Events
DOM HTMLDHTML
CSS
HTMLXML
SVG
JSON
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Web 2.0
JavaScript
Formatos de comunicação de dados
Protocolo de comunicação HTTP
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Web 2.0
AjaxJavaScript
HTML Events
DOM HTMLDHTML
CSS
HTMLXML
SVG
JSON
JAVA.netPHP Python
RUBY
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Web 2.0
Ajax
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Web 2.0
Web como plataforma
Web humana
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Web 2.0
Web como plataforma
Web mashups
Reutilização de conteúdo web disponíveis em outras aplicações
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Web 2.0
Web como plataforma
Web mashups
XML SVG JSON
RSS Schema
RPC RestFulWebservices
Ajax
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Web 2.0
Web como plataforma
Web mashups
Reutilização
Performance60
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HTML5
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1989 Hoje
HTML
HTTP
Browser
HTML
Hoje
JavaScript CSS
HTML5
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HTML5
JavaScript
HTML
CSS 3
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HTML5
• Armazenamento no Cliente (Web SQL Database, App Cache, Web Storage)
• Communicação (Web Sockets, Worker Workers)
• Interação com o Usuário (Notifications, Drag and Drop API)
• Geolocalização
JavaScript
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HTML5
• Semântica (New tags, Link Relations, Microdata)
• Acessibilidade (ARIA roles)
• Formulário Web 2.0 (Input Fields)
• Multimídia (Audio Tag, Video Tag)
• Desenhos 2D and 3D (Canvas, WebGL, SVG)
HTML
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HTML5
• Tipografia (Text-shadow, font face)
• Novos elementos visuais (RGBA, Border Radius, Gradient)
• Transição, transformação e animação
CSS 3
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HTML5
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Impactos no desenvolvimento
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Impactos no desenvolvimento
• Vantagens da plataforma web
• Cliente padrão
• Atualizações centralizadas no servidor
• Portabilidade
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HTML e HTTP
Interoperabilidade
HTML
HTTP
Browser
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Web 2.0
Web humana
HTML Usuários
Usabilidade
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Web 2.0
Web como plataforma
Web mashups
Reutilização
Performance72
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Impactos no desenvolvimento
HTML
JavaScript CSS
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Impactos no desenvolvimento
HTML
JavaScript CSS
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Impactos no desenvolvimento
HTML
JavaScript CSS
Usuários75
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Impactos no desenvolvimento
HTML
JavaScript CSS
Usuários76
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Impactos no desenvolvimento
HTML
JavaScript CSS
Usuários77
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Referências• CHERYL GRIBBLE. History of the Web Beginning at CERN, 2010. Disponível em: http://
www.hitmill.com/internet/web_history.html.
• TIM BERNERS-LEE. Information Management: A Proposal, 1990. Disponível em: http://www.nic.funet.fi/index/FUNET/history/internet/w3c/proposal.html.
• TIM BERNERS-LEE e R. CAILLIAU. World Wide Web: Proposal for a HyperText Project, 1990. Disponível em: http://www.w3.org/Proposal.html.
• DOM CONNOLY. A Little History of the World Wide Web, 2000. Disponível em: http://www.w3.org/History.html.
• J. J. GARRET. Ajax: A new approach to web applications, 2005. Disponível em: http://adaptivepath.com/ideas/essays/archives/000385.php.
• M. MAHEMOFF. Ajax Design Patterns, 2006. O’Reilly Media, Inc.
• P. FRATERNALI, S. COMAI, A. BOZZON E G. T. CARUGHI. Engineering rich internet applications with a model-driven approach, 2010. ACM Transaction on Information Systems.
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Onde procurar ajuda?
• http://w3schools.com
• http://www.w3.org/TR/REC-html40/
• http://www.w3.org/Protocols/rfc2616/rfc2616.html
• http://www.html5rocks.com/
• http://ajaxpatterns.org/Patterns
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