from twisted.application import service
from twisted.application import internet
from twisted.web import server
from twisted.web import resource
from twisted.web import static

# urls will look like
# http://localhost:8080/theInputFileName.pdf?r=96&o=outputFile.jpg

class Simple(resource.Resource):
    def getChild(self, name, request):
        inputfile = name
        resolution = int(request.args.get('r', ['72'])[0])
        outputfile = request.args.get('o', [None])[0]
        if outputfile is None:
            outputfile = mktmp()
        #doTheTransformationSavingInOutputFile()
        return static.File(outputfile, 'image/jpeg')


root = Simple()
application = service.Application("simplest")
internet.TCPServer(8080, server.Site(root)).setServiceParent(application)