app.py

from werkzeug import BaseRequest, BaseResponse, ETagResponseMixin, escape, run_simple, SharedDataMiddleware
from werkzeug.exceptions import HTTPException
from werkzeug.routing import RequestRedirect
from jinja import Environment, FileSystemLoader, MemcachedFileSystemLoader
from jinja.exceptions import TemplateNotFound
import os
from time import time
from random import randint

domain = "http://www.i2p2.de"

class Request(BaseRequest):
    """Useful subclass of the default request that knows how to build urls."""

    def __init__(self, environ):
        BaseRequest.__init__(self, environ)


class Response(BaseResponse, ETagResponseMixin):
    """Subclass of base response that has a default mimetype of text/html."""
    default_mimetype = 'text/html'


# setup jinja
try:
    env = Environment(loader=MemcachedFileSystemLoader('pages', memcache_host=['127.0.0.1:11211'], memcache_time=5*60))
except RuntimeError:
    env = Environment(loader=FileSystemLoader('pages', use_memcache=False, auto_reload=True))

def app(environ, start_response):
    """The WSGI application that connects all together."""
    req = Request(environ)
    path = req.path[1:].lower()
    # do theme handling
    theme = 'light'
    if 'style' in req.cookies:
        theme = req.cookies['style']
    if 'theme' in req.args.keys():
        theme = req.args['theme']
    if not os.path.isfile('static/styles/%s.css' % theme):
        theme = 'light'
    if path == '':
        path = 'index'
    mime_type='text/html'
    try:
        try:
            path.index('.')
            if path.split('.')[-1].isdigit() and not path.split('.')[-1].isalpha():
                raise ValueError()
            tmpl = env.get_template(path)
            if path[-3:] == 'txt':
                mime_type='text/plain'
            if path[-3:] == 'xml':
                mime_type='text/xml'
        except ValueError:
            tmpl = env.get_template(path + '.html')
    except TemplateNotFound:
        tmpl = env.get_template('not_found.html')
    resp = Response(tmpl.render(static=False, theme=theme, domain=domain, path=path), mimetype=mime_type)
    # more theme handling
    if theme == 'light' and 'style' in req.cookies:
        resp.delete_cookie('style')
    elif theme != 'light':
        resp.set_cookie('style', theme)
    resp.add_etag()
    resp.make_conditional(req)
    return resp(environ, start_response)

app = SharedDataMiddleware(app, {
    '/_static': os.path.join(os.path.dirname(__file__), 'static')
})

if __name__ == '__main__':
    run_simple('localhost', 5009, app)