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gawkinet: Some Applications and Techniques

 
 3 Some Applications and Techniques
 **********************************
 
 In this major node, we look at a number of self-contained scripts, with
 an emphasis on concise networking.  Along the way, we work towards
 creating building blocks that encapsulate often needed functions of the
 networking world, show new techniques that broaden the scope of problems
 that can be solved with 'gawk', and explore leading edge technology that
 may shape the future of networking.
 
    We often refer to the site-independent core of the server that we
 built in A Simple Web Server Simple Server.  When building new
 and nontrivial servers, we always copy this building block and append
 new instances of the two functions 'SetUpServer()' and 'HandleGET()'.
 
    This makes a lot of sense, since this scheme of event-driven
 execution provides 'gawk' with an interface to the most widely accepted
 standard for GUIs: the web browser.  Now, 'gawk' can rival even Tcl/Tk.
 
    Tcl and 'gawk' have much in common.  Both are simple scripting
 languages that allow us to quickly solve problems with short programs.
 But Tcl has Tk on top of it, and 'gawk' had nothing comparable up to
 now.  While Tcl needs a large and ever-changing library (Tk, which was
 bound to the X Window System until recently), 'gawk' needs just the
 networking interface and some kind of browser on the client's side.
 Besides better portability, the most important advantage of this
 approach (embracing well-established standards such HTTP and HTML) is
 that _we do not need to change the language_.  We let others do the work
 of fighting over protocols and standards.  We can use HTML, JavaScript,
 VRML, or whatever else comes along to do our work.
 

Menu

 
· PANIC                       An Emergency Web Server.
· GETURL                      Retrieving Web Pages.
· REMCONF                     Remote Configuration Of Embedded Systems.
· URLCHK                      Look For Changed Web Pages.
· WEBGRAB                     Extract Links From A Page.
· STATIST                     Graphing A Statistical Distribution.
· MAZE                        Walking Through A Maze In Virtual Reality.
· MOBAGWHO                    A Simple Mobile Agent.
· STOXPRED                    Stock Market Prediction As A Service.
· PROTBASE                    Searching Through A Protein Database.
 

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