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Implementing refresh-free SVG-perl-DBI-Javascript client-server interactionby hackmare (Pilgrim) |
on Feb 11, 2002 at 09:01 UTC ( [id://144602]=CUFP: print w/replies, xml ) | Need Help?? |
Caution: This may be nonfunctional on NS4.7+. Tested it on IE6 earlier but now it aint working with NS4.7. Either I broke it or it's not cross-browser yet. Here is an example of SVG (drawing XML dialect) interacting with a server through get reqests (can also do post requests). The original concept was posted on the svg-developers yahoo group in early Feb 2002, and I've adapted it to perl (of course). The startup screen gives you 2 squares. Clicking on the squares causes a request to a database to go out which returns the xml for the drawings of the circles that fall within the square's periphery. Key point: This is all done from within a single browser window, and with no refresh of the image. Other key point: My server is not running mod_perl, which would make the lag about 1/2 as bad (currently it's 500mS for me, with 100 entries x 5 fields in the database, but then again the request is going 1/2 around the world for me). Modules used:
I've included the source files for inspection. Next step: drawing onto the space and updatating the database from that. I used SVG, but you could just as well use xmlrpc and dhtml for this. hackmare.
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