1 / 29

Information technology in business and society

Information technology in business and society. Session 7 – the Web Sean J. taylor. Administrativia. Assignment 1 d ue tonight at 1am. My office hours: moved to 3:30-5:30pm on FRIDAY (permanently?) Assignment 2 due 2/23 Blog tips. Blog tips. Use Markdown:

reilly
Download Presentation

Information technology in business and society

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Information technology in business and society Session 7 – the Web Sean J. taylor

  2. Administrativia • Assignment 1 due tonight at 1am. • My office hours: moved to 3:30-5:30pm on FRIDAY (permanently?) • Assignment 2 due 2/23 • Blog tips

  3. Blog tips • Use Markdown: • Include “!m” somewhere in the email. • Links are then [Link name](http://linklocation.com) • Use raw links and plain text: • This is my cool link: http://www.google.com • Don’t include dashes before your signature: • Bad: --SJT Good: SJT

  4. Learning objectives • Understand how the web works at a high level. • HTTP • URLs • HTML • Be ableto create your own web page.

  5. The WEB

  6. Web History •  use hypertext • "... to link and access information of various kinds as a web of nodes in which the user can browse at will” • - Berners-Lee and Cailliau • November, 1990

  7. World wide web • web of hypertext documents • viewed by browsers • using a client–server architecture • HTTP: communication protocol • URLs: addressability • HTML: hypertext!

  8. Layers

  9. HTTP In action Request Response metadata

  10. HTTP In action: Response

  11. HTTP Methods • GET – retrieve a resource • POST – create a new resource • PUT – update an existing resource • DELETE – delete a resource • Always include a URL!

  12. URLS

  13. Uniform resource locators • Format: • scheme://hostname:port/path?query_string#fragment_id • Scheme: http, https, ftp, gopher, wais • Domain: Hostname is usually subdomain.domain.tld • Port: Each server can have multiple ports • Path: + query string: define a resource • Fragment: used for web page navigation

  14. Putting HTML Files on the server

  15. Editing HTML Files

  16. Basic Document Structure • <html> • <head> • <title>My Awesome Webpage</title> • </head> • <body> • <h1>This is the heading!</h1> • <p>It was the best of webpages.</p> • <a href=“http://google.com”>Google</a> • </body> • </html>

  17. More Tags • <ul> • <li>List item 1</li> • <li>List item 2</li> • </ul> • <h1>Big header!</h1> • <h2>Smaller header</h2> • <imgsrc=“http://link.to/image.png”></img> • <div>Some content</div> • <span>Some content</span>

  18. Adding Style with CSS • <style> • h1 { color: blue; text-align: center; } • P { width: 400px } • </style> • Or put a link in your <head> area. • <link rel=“stylesheet” type=“text/css” href=“style.css”></link>

  19. Embedding Content

  20. Programmability with JS • De-facto programming language for the web. • Tons of resources for learning. • Makes a webpage dynamic.

  21. Raw Text or WYSiWYG

  22. Markup:Display or Semantic • Some HTML tags are intended to convey semantics. • This allows machines to understand web pages better but giving them an idea of what information is placed where in the document. • “I have a dream for the Web [in which computers] become capable of analyzing all the data on the Web – the content, links, and transactions between people and computers. “ • -- Tim Berners-Lee • Challenges? Benefits?

  23. “Dive into HTML5” Mark Pilgrim Web Book

  24. Next Class:Attention Economics • The Information Diet (Chapter 3)

More Related