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README

$Id$

oksamples
---------
Here are some trivial server examples that can run with OKD to create
webservers.  Here are the relevent files:

 websrv/sha.g -- This is the front end of a web service that takes
   input from the user, and then queries a database for the SHA-1
   hash of that word.  The database contains all words in 
   /usr/share/dict/ on FreeBSD 4.8. More comments can be found
   in that file.  Note especially that regions inside the C++ comment
   sequence /*o ... o*/  are interpreted by the pub filter; commands
   here are transformed into less readable, and less manageable
   C++ commands.

 webserv/sha2.g -- Does the same as above, but uses the runtime templating
   system to output HTML code.  The template can be found in
   ~max/web/sha.html. Because the publishing daemon is being run
   with white-space stripping enabled, all unncessary white space
   is stripped out of the HTML source.

 libprot/sha_prot.x -- An RPC file describing the protocol that
   the two above programs use to talk to the shad database proxy.

 dbprox/shad.C -- a simple database proxy, that speaks both SQL
   and RPC.  The SQL interface is designed specifically for libasync,
   but should look pretty similar to Perl DBI.  The dispatch ()
   function is not the typical ASRV dispatch.  Rather, it's running
   inside a thread, so that its database calls won't block the 
   proxy.  The "reply" function merely puts the RPC result into
   a memory region common to the child and parent thread; it then
   sends a message over a pipe to the parent thread that the result
   is ready.  The parent threads then responds to the RPC request
   as normal.
  

 websrv/google.C -- one last web service; a redirect to www.google.com.


In case you require the use of these very useful web-services,
they're currently running on my machine:

	http://rael.lcs.mit.edu/sha
 	http://rael.lcs.mit.edu/sha2
	http://rael.lcs.mit.edu/google




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