server-svglaser.py

#!/usr/bin/env python

import BaseHTTPServer
import urllib
import threading
import Queue
import time

q = Queue.Queue()

class MyHandler(BaseHTTPServer.BaseHTTPRequestHandler):

    def do_POST(self):
        if self.headers.has_key('content-length'):
            length= int( self.headers['content-length'] )
            content = self.rfile.read(length)
            svg = urllib.unquote_plus(content[4:])
            q.put(svg)
        self.send_response(200)
        self.end_headers()

server_address = ('', 8000)
httpd = BaseHTTPServer.HTTPServer(server_address, MyHandler)
MyHandler.q = q

print 'listening at 8000 ...'

def laser_loop(q):
    import LaserDisplay
    from LaserDisplay.SvgProcessor import SvgProcessor

    LD = LaserDisplay.create()

    LD.set_scan_rate(30000)
    LD.set_blanking_delay(0)

    sp = SvgProcessor(LD)
    svg = None

    while True:
        if not q.empty():
            svg = q.get()
        if not svg is None:
            sp.parseString(svg, 255.0/595.0)
            LD.show_frame()
            time.sleep(1.0/25.0)

threading.Thread(target=httpd.serve_forever).start()
threading.Thread(target=laser_loop, args=[q]).start()