180P6 Web Forms & data

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How is data transferred using an online form?
Remember, your web browser, or app etc., only really receives information (data) to display. Local processing of data is done in very limited amounts.
The vast majority of data is processed by the web servers that provide the web site or web service


Exercise

Ex 1Ex 2Ex 3

What data & resources does an e-commerce website need & use?

  • take your favourite online shop as your example
  • go through the motions of selecting and buying a product
    • for each page you visit, write down all the data (information) and resources (eg images) needed for that page to work
      • a table could be good for this
      • keep your data list and resources in separate columns
      • put your observations in a separate row for each page

Track how data moves within a website

Look at your list of data you made in Ex1

  • draw out your journey through the website
    • flow chart style, page by page, down the page
    • next to each page draw the server
  • for each page write down the data used
  • show how the data is exchanged between the browser page and the server

Show what the server is doing

You have now identified the data the web server is sending to the browser (page)

  • draw out your journey through the website
    • flow chart style, page by page, down the page
    • show the data flowing from between browser & server
    • next to each page draw a box for the server
  • for each page write down what the server has to do, eg
    • get page data, create page
    • send/ read cookies
    • etc