如何预处理所有呼叫？

Question

I use bottle.route() to redirect HTTP queries to appropriate functions

import bottle

def hello():
    return "hello"

def world():
    return "world"

bottle.route('/hello', 'GET', hello)
bottle.route('/world', 'GET', world)
bottle.run()

I would like to add some preprocessing to each call, namely the capacity to act upon the source IP (obtained via bottle.request.remote_addr ). I can specify the preprocessing in each route

import bottle

def hello():
    preprocessing()
    return "hello"

def world():
    preprocessing()
    return "world"

def preprocessing():
    print("preprocessing {ip}".format(ip=bottle.request.remote_addr))

bottle.route('/hello', 'GET', hello)
bottle.route('/world', 'GET', world)
bottle.run()

but this looks awkward.

Is there a way to plug the preprocessing function on a global level? (so that each call goes though it?)

Answer 1

I think you can use bottle's Plugin

doc here: http://bottlepy.org/docs/dev/plugindev.html#bottle.Plugin

code example

import bottle

def preprocessing(func):
    def inner_func(*args, **kwargs):
        print("preprocessing {ip}".format(ip=bottle.request.remote_addr))
        return func(*args, **kwargs)
    return inner_func

bottle.install(preprocessing)

def hello():
    return "hello"


def world():
    return "world"

bottle.route('/hello', 'GET', hello)
bottle.route('/world', 'GET', world)
bottle.run()