[pclasses-devel] an s11n-first: de/serialization over http using P::Classes

[stephan b. <st...@s1...>]

This certainly isn't a world-first, but it is a first for s11n:

i've just serialized a list<> over http, using a PHP proxy script to 
store it in a mysql db as raw text, and then deserialized it back over 
http. The implementation probably only works for small data sets, 
because i'm using http GET and a hell of a lot of space-to-%20 
encoding, but the work was fairly trivial - even the encoding part fit 
right in to the existing Serializer model.

The client-side code is trivial:

Create and save an object:

  typedef std::list<lext::lex_t> ListT;
  ListT li;
  li.push_back( 42 );
  li.push_back( -42.42 );
  li.push_back( "fourty two" );
  li.push_back( 'x' );
  bool workie;
  if( ! P::s11n::save( li, "http://s11n/ps11n.php?node_name=name" ) )
  {
      ... failed :( ...
  }


Load a node:

P::s11n::node_type * node =
  P::s11n::load_node( "http://s11n/ps11n.php?node_name=name" );

"Completely" deserialize it with:

  ListT li;
  bool worked = P::s11n::deserialize( *node, li );
  delete node;



Note that http://s11n/ is my local machine, not s11n.net.


Test output:

Write an object:

stephan@owl: > m && ./test
<snip>
test.cpp:36 : test_writeurl()
// the object we're writing to the URL:
test.cpp:47 : list<lex_t>:
(s11n::parens)
data_node=(list
        data_node=(lex_t (v 42))
        data_node=(lex_t (v -42.420000))
        data_node=(lex_t (v fourty two))
        data_node=(lex_t (v x))
)
ps11n.hpp:220 : serialize(node,
[http://s11n/ps11n.php?node_name=egal])...
<snip>
stephan@owl:~/cvs/s11n.net/ps11n/src> echo $?
0


Load it back:

stephan@owl: > m && ./test 'http://s11n/ps11n.php?node_name=egal'
test.cpp:15 : test_readurl()
test.cpp:25 : node ? = 0x80b9c58
// the data we got from the web server:
(s11n::parens)
data_node=(list
        data_node=(lex_t (v 42))
        data_node=(lex_t (v -42.420000))
        data_node=(lex_t (v fourty two))
        data_node=(lex_t (v x))
)



The PHP quick-hack http/mysql proxy is attached, and the db code is 
simply:

CREATE TABLE ps11n (
  id int(11) NOT NULL auto_increment,
  name varchar(255) NOT NULL default '',
  data longtext,
  PRIMARY KEY  (name,id),
  UNIQUE KEY id (id),
  KEY name (name)
) TYPE=MyISAM;

The ID field isn't strictly neccessary, though.


-- 
----- st...@s1...   http://s11n.net
"...pleasure is a grace and is not obedient to the commands
of the will." -- Alan W. Watts