standalone cherrypy app for openshift

app.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
import os
import cherrypy
## this have to be here to work on OpenShift environment
try:
    zvirtenv = os.path.join(os.environ['OPENSHIFT_PYTHON_DIR'],
                            'virtenv', 'bin', 'activate_this.py')
    execfile(zvirtenv, dict(__file__=zvirtenv))
except KeyError:
    pass
except IOError:
    pass


class Root():
    @cherrypy.expose()
    def index(self):
        return "hello world"

def local_start():
    """
    For test environment we use local paths
    """
    if 'OPENSHIFT_PYTHON_VERSION' not in os.environ:
        os.environ['OPENSHIFT_DATA_DIR'] = '/var/tmp'
        os.environ['OPENSHIFT_REPO_DIR'] = '/var/tmp'
        os.environ['OPENSHIFT_PYTHON_IP'] = '127.0.0.1'
        os.environ['OPENSHIFT_PYTHON_PORT'] = "8080"     # this have to be a string
        os.environ['OPENSHIFT_LOG_DIR'] = '/var/tmp'

if __name__ == '__main__':
    local_start()


    ## this is  config for server
    global_config = {
        'server.thread_pool': 100,
        'log.screen': True,
        'log.error_file': '%s/error.log' % os.environ['OPENSHIFT_LOG_DIR'],
        'socket_queue_size': 50,
        'thread_pool_max': -1,
    }
    ## this is config file for app
    root_conf = {
        '/': {
            'tools.sessions.on': True,
            'tools.sessions.expire': 600,
            'tools.caching.on': False,
            'tools.caching.delay': 600,
            'log.screen': True,
            'log.access_file': '%s/access.log' % os.environ['OPENSHIFT_LOG_DIR'],
            'log.error_file': '%s/error.log' % os.environ['OPENSHIFT_LOG_DIR']
        },
        '/static': {
            'tools.staticdir.on': True,
            'tools.staticdir.dir': "%s/static/" % os.environ['OPENSHIFT_REPO_DIR']
        },
        '/favicon.ico': {
            'tools.staticfile.on': True,
            'tools.staticfile.filename': "%s/static/favicon.ico" % os.environ['OPENSHIFT_REPO_DIR']
        },

    }

    cherrypy.config.update(global_config)
    #cherrypy.config.update({'environment': 'production'})
    cherrypy.tree.mount(Root(), "", root_conf)

    ip = os.environ['OPENSHIFT_PYTHON_IP']
    port = int(os.environ['OPENSHIFT_PYTHON_PORT'])

    cherrypy.server.socket_host = ip
    cherrypy.server.socket_port = port

    cherrypy.engine.start()
    cherrypy.engine.block()