Teach You How to Get Started With Python One Hundred and Seventeen

Teach You How to Get Started With Python One Hundred and Seventeen

This section implements the use of dictionaries to manage request paths through a case study.

Python One Hundred and Seventeen.Use a dictionary to manage request paths

Write a function to add a new request path through the url (dictionary), and the callback function implements the result.
url = {
'/' : index ,
'/test' : show_test ,
'/demo' : show_demo ,
'/hello': show_hello,
'/info': show_info,
'/foo': show_foo
}
示例：
import json
from wsgiref.simple_server import make_server


def load_file(file_name, **kwargs):
try:
with open('pages/' + file_name, 'r', encoding='utf8') as file:
content = file.read()
if kwargs: # kwargs = {'username':'zhangsan','age':19,'gender':'male'}
content = content.format(**kwargs)
# {username}, welcome back, you are {age} years old this year, your gender is {gender}.format(** kwargs )
return content
except FileNotFoundError :
print( 'File not found' )


def index ( ) :
return 'Welcome to my homepage'


def show_test ( ) : _
# return json.dumps ({'name': ' zhangsan ', 'age': 18})
return json.dumps ([ ' zhangsan ' , ' lisi ' , ' wangwu ' , 'jack' ])


def show_ demo ( ) :
return load_file('xxxx.txt')


def show_hello():
return load_file('hello.html')


def show_info():
return load_file('info.html', username='zhangsan', age=19, gender='male')


def show_foo():
return '我是foo'


url = {
'/': index,
'/test': show_test,
'/demo': show_demo,
'/hello': show_hello,
'/info': show_info,
'/foo': show_foo
}


def demo_app(environ, start_response):
path = environ['PATH_INFO']
status_code = '200 OK'

method = url.get(path)
if method:
response = method()
else:
status_code = '404 Not Found'
response = '页面走丢了'

start_response(status_code, [('Content-Type', 'text/html;charset=utf8')])
return [response.encode('utf8')]


if __name__ == '__main__':
httpd = make_server('', 8090, demo_app)
sa = httpd.socket.getsockname()
print("Serving HTTP on", sa[0], "port", sa[1], "...")
httpd.serve_forever()