Please enable JavaScript.

Coggle requires JavaScript to display documents.

Web Application Development Concepts (Process of Web App development…

- - - - Dynamic
      - Static
        
        Static pages are not parsed by the server - browsers need to do this
        
        e.g. submitting additional requests for images/embedded objects
        
        2.as-is pages: pages for which complete HTTP responses (including headers)
        already exist and can be presented ‘as is’.
        
        static content pages: static files containing HTML pages, XML pages, plain
        text, images, etc., for which HTTP responses must be constructed (including
        headers); and
- - - - Commonly written using Perl
        
        AN Interpreted language - so slower than a compiled one e.g. C
        
        But can technically use any language
    - - common processing must be repeated for each request
  - - - .cfm
      - Allaire/Macromedia
    - - Microsoft
    - - Sun Microsystems
      - Pre-processor for servlet programmers
        
        creating Java classes as compiled modules
        
        faster execution
        
        compiled into Java Byte Code
        
        No parsing overhead or security issues
      - MVC approach is called JSP Model 2 #
        
        Interfaces with JavaBeans to encapsulate access to data
        
        Enables multiple view components to use same data
        
        e.g. desktop & handheld
    - - .php
      - Open Source
    - - .shtml
      - Requires Server to parse pages in order to discover and execute SSI macros #
      - useful for adding dynamic content to existing pages without generating entire page
      - Requires additional load on Server
      - Security issues
        
        Allows page-owners to run server-side programs
      - Convenient way to deploy and manage apps that collect data from different sources
    - - • submitting database queries,
      - • iterative processing (analogous to repetitive ‘for-each’ looping), and
      - • conditional processing (analogous to ‘if’ statements).
  - - - /servlet/
      - Portable across different servers/hardware/OS
      - Don't require spawning for each (common) request
      - Link to servlet runners, which include JAVA VIRTUAL MACHINE
        
        Runners can talk to Server APIs through JAVA NATIVE INTERFACE (JNI)
        
        or via stand-alone mode
      - Can handle multiple concurrent requests & forward requests to other servlets/servers
  - - - reduced spawning
    - - lack of popularity and development of servelets
- - - - implement protocols to enable custom software to provide dynamic content access
    - - Virtual Hosting: if this Web server is providing service for multiple domains,
        determine the domain for which this request is targeted, and use the detected
        domain to select configuration parameters.,
        
        Address Mapping: determine whether this is a request for static or dynamic
        content, based on the URL path and selected server configuration parameters,
        and resolve the address into an actual location within the server’s file system.
        
        Authentication: if the requested resource is protected, examine authorization credentials
        to see if the request is coming from an authorized user.
    - - Including:
        
        Ruby on Rails
        
        PHP
        
        C#
        
        Java
        
        Python
        
        Javascript
      - Attributes include:
        
        Is never seen by the user (except within a rare malfunction)
        
        Stores data such as user profiles, tweets, pages, etc…
        
        Creates the page the user requested
  - - - Include:
        
        CSS
        
        Javascript
        
        HTML
- - - - WWW-Authenticate header
  - - - Server security is about 80/20 compromises—attempts
        to achieve eighty percent of desired security for your servers at
        the cost giving up twenty percent of convenience in building and maintaining applications
- - - - CGI Scripts
      - Servlets