用Python写一个简单的Web框架【2
五、重构
上面的代码虽然奏效，但是在编码风格和灵活性方面有很多问题，下面逐步对其进行重构。
1、正则匹配URL
消除URL硬编码，增加URL调度的灵活性：
Python
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 | #!/usr/bin/env python # -*- coding: utf-8 -*-
"""application.py"""
import re ##########修改点
class my_app:
urls = ( ("/", "index"), ("/hello/(.*)", "hello"), ) ##########修改点
def __init__(self, environ, start_response): self.environ = environ self.start = start_response
def __iter__(self): ##########修改点 path = self.environ['PATH_INFO'] method = self.environ['REQUEST_METHOD']
for pattern, name in self.urls: m = re.match('^' + pattern + '$', path) if m: # pass the matched groups as arguments to the function args = m.groups() funcname = method.upper() + '_' + name if hasattr(self, funcname): func = getattr(self, funcname) return func(*args)
return self.notfound()
def GET_index(self): status = '200 OK' response_headers = [('Content-type', 'text/plain')] self.start(status
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