def app(environ, start_response):
layer, coord, ext = TileStache._splitPathInfo(environ['PATH_INFO'])
if not config.layers.get(layer, False):
status = '404 NOT FOUND'
data = ''
else:
try:
content_type, data = TileStache.handleRequest(config.layers[layer], coord, ext)
status = '200 OK'
except Exception, e:
status = '500 SERVER ERROR'
data = str(e)
