Example of Bottle app with Django style request object as first parameter to request function handler and login_required decorator.

app.py

"""
Bottle (and also Flask) seem to favor global request object that when called within
a request function handler, will return request data that specific to the current request.
This is convenience since it free you from having to pass request object from function to
function as you would have in Django. Maybe I'm too used with Django approach but having request
object explicitly passed to your function allow me to correctly think how to structure my app.
It's not just one time when designing a solution, I come to dead end because I try to access request
data not from request context. It easy to fall into that because the request object available in the
global namespace.

I have only test this under cgi environment but not really sure if it's ok to modify the request
object (like attaching user attribute to the request) in multithreaded wsgi environment.
"""

import sys
import os
from hashlib import md5

import bottle

class RequestPlugin(object):
    def apply(self, callback, context):
        def wrapper(*args, **kwargs):
            request = bottle.request
            response = callback(request, *args, **kwargs)
            return response
        return wrapper

requestplugin = RequestPlugin()

app = bottle.Bottle()
app.install(requestplugin)

def is_logged_in(request):
    host = request.headers['Host']
    cookie_name = 'SESS%s' % md5(host).hexdigest()
    sid = request.cookies[cookie_name]
    rs = engine.execute("SELECT * FROM sessions WHERE sid = %(sid)s", sid=sid)
    if rs.rowcount > 0:
        row = rs.fetchone()
        if row[0] > 0:
            return True

    return False

def login_required(func):
    def wrapper(*args, **kwargs):
        request = bottle.request
        request.user = None
        if is_logged_in(request):
            request.user = True
            body = func(request, *args, **kwargs)
            return body
        return bottle.redirect('/')
    return wrapper

@app.route('/customer/', apply=[login_required])
def customer(request):
    return spos.customer.main(request, bottle.jinja2_template)
    
app.run(debug=True)