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Study Guide 170

HTTP
    • Describe what HTTP is and the role of the request and the response
      • HTTP is a system of rules , that serve as a link between application and the transfer of hypertext documents.  It is an agreement of how machines communicate with each other 
      • HTTP follows a model, where client make a request and the server make a response (ie. it is a request response protocol). 
    • What are the components of an HTTP request and an HTTP response?
    • Identify the components of a URL. Construct a URL that contains a few params and values.
    • Explain the difference between GET and POST, and know when to choose each.
    • What is the difference between client-side and server-side code? For each file in a Sinatra project, be able to say which it is.

    Web

    • How does an HTML form element interact with the server-side code that processes it.
    • Why is user-entered content a security risk? Be aware of how to mitigate this risk.

    Sinatra

    • Start a new Sinatra project and write simple routes to handle requests.
    • What are the benefits of using view templates? Be able to use an ERB template in a Sinatra route.
    • What is the session? Where it is stored? How it is used?
    • Write a view helper and use it within a view template.
    • Explain how redirection works and why it would be needed in a web application.
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