02-web框架

1

while True:
print('server is waiting...')
conn, addr = server.accept()
data = conn.recv(1024)
print('data:', data)
# 1.得到请求的url路径
# ------------dict/obj d=["path":"/login"]
# d.get(”path“) # 按着http请求协议解析数据 # 专注于web业务开发
path = d.get('path') if path == "/login":
return login.html # 按着http响应协议封装数据

2

# 报错信息
C:\Windows\system32>pip install wsgiref
Collecting wsgiref
Using cached https://files.pythonhosted.org/packages/41/9e/309259ce8dff8c596e8c26df86dbc4e848b9249fd36797fd60be456f03fc/wsgiref-0.1.2.zip
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "C:\Users\Venicid\AppData\Local\Temp\pip-build-f8zmzqr9\wsgiref\setup.py", line 5, in <module>
import ez_setup
File "C:\Users\Venicid\AppData\Local\Temp\pip-build-f8zmzqr9\wsgiref\ez_setup\__init__.py", line 170
print "Setuptools version",version,"or greater has been installed."
^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("Setuptools version",version,"or greater has been installed.")? ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in C:\Users\Venicid\AppData\Local\Temp\pip-build-f8zmzqr9\wsgiref\

  

# wsgiref 是标准库,不需要安装

C:\Windows\system32>python
Python 3.6.5 (v3.6.5:f59c0932b4, Mar 28 2018, 16:07:46) [MSC
>>> import wsgiref

  

from wsgiref.simple_server import make_server

def application(environ,start_response):
# 按着http协议解析数据:environ
# 按着http协议组装数据:start_response
print(environ)
print(type(environ)) start_response('200 OK', []) return [b"<h3>hello wsgiref</h3>"] # 1.封装socket
httpd = make_server("",8802,application) # 2.等待用户连接: conn,addr = server.accept()
httpd.serve_forever() # application(environ,start_response)

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02-web框架

根据path进行响应不同的html

方案1:

from wsgiref.simple_server import make_server

def application(environ,start_response):
# 按着http协议解析数据:environ
# 按着http协议组装数据:start_response
print(environ)
print(type(environ)) # 当前的请求路径
path = environ.get('PATH_INFO')
print(path)
start_response('200 OK', [])
if path == "/login":
with open('login.html','r') as f:
data = f.read()
elif path == '/index':
with open('index.html','r') as f:
data = f.read()
elif path == '/favicon.ico': # icon图标
with open('favicon.ico','rb') as f:
data = f.read()
return [data]
return [data.encode('utf8')] # 1.封装socket
httpd = make_server("",8802,application) # 2.等待用户连接: conn,addr = server.accept()
httpd.serve_forever() # application(environ,start_response)

方案2:解耦

from wsgiref.simple_server import make_server

def login():
with open('login.html', 'rb') as f:
data = f.read()
return data def index():
with open('index.html', 'rb') as f:
data = f.read()
return data def favi():
with open('favicon.ico', 'rb') as f:
data = f.read()
return data def application(environ, start_response):
# 按着http协议解析数据:environ
# 按着http协议组装数据:start_response
print(environ)
print(type(environ)) # 当前的请求路径
path = environ.get('PATH_INFO')
start_response('200 OK', []) url_patterns = [
("/login",login),
('/index',index),
('/favicon.ico',favi)
] func = None
for item in url_patterns:
if path == item[0]:
func = item[1]
break
if func:
return [func()]
else:
return [b''] # 1.封装socket
httpd = make_server("", 8805, application) # 2.等待用户连接: conn,addr = server.accept()
httpd.serve_forever() # application(environ,start_response)

添加新的reg模块:快速方便

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  添加请求environ

from wsgiref.simple_server import make_server

def login(environ):
with open('login.html', 'rb') as f:
data = f.read()
return data def index(environ):
with open('index.html', 'rb') as f:
data = f.read()
return data def reg(environ):
with open('reg.html', 'rb') as f:
data = f.read()
return data def favi(environ):
with open('favicon.ico', 'rb') as f:
data = f.read()
return data def application(environ, start_response):
# 按着http协议解析数据:environ
# 按着http协议组装数据:start_response
print(environ)
print(type(environ)) # 当前的请求路径
path = environ.get('PATH_INFO')
start_response('200 OK', []) url_patterns = [
("/login",login),
('/index',index),
('/favicon.ico',favi),
('/reg',reg)
] func = None
for item in url_patterns:
if path == item[0]:
func = item[1]
break
if func:
return [func(environ)]
else:
return [b''] # 1.封装socket
httpd = make_server("", 8805, application) # 2.等待用户连接: conn,addr = server.accept()
httpd.serve_forever() # application(environ,start_response)

3、yun框架

02-web框架

main.py 启动程序

from wsgiref.simple_server import make_server

def application(environ, start_response):
path = environ.get('PATH_INFO')
start_response('200 OK', []) from urls import url_patterns # 导入路由表 func = None
for item in url_patterns:
if path == item[0]:
func = item[1]
break
if func:
result = func(environ) # 执行视图函数
return [result] else:
return [b''] print('start yun框架...') # 1.封装socket
httpd = make_server("", 8806, application) # 2.等待用户连接: conn,addr = server.accept()
httpd.serve_forever() # application(environ,start_response)

urls.py路由分发

from views import *

url_patterns = [
("/login", login), # 视图函数
('/index', index),
('/favicon.ico', fav),
('/reg', reg),
('/timer', timer)
]

views.py 视图函数

def login(environ):
with open('./templates/login.html', 'rb') as f:
data = f.read()
return data def index(environ):
with open('./templates/index.html', 'rb') as f:
data = f.read()
return data def reg(environ):
with open('./templates/reg.html', 'rb') as f:
data = f.read()
return data def fav(environ):
with open('./templates/favicon.ico', 'rb') as f:
data = f.read()
return data def timer(environ):
import datetime
now_time = datetime.datetime.now().strftime('%y-%m-%d %X')
return now_time.encode('utf8') # bytes类型

4、

02-web框架

新建 models.py 数据交换py文件

# 数据库交互文件

# 生成用户表
import pymysql # 连接数据库
conn = pymysql.connect(
host='127.0.0.1',
port=3306,
user='root',
password='root',
db='db61',
charset='utf8'
) # 获取游标
cursor = conn.cursor() # 执行sql语句
sql = """
create table userinfo(
id int primary key,
name varchar(32),
password varchar(32)
)
"""
cursor.execute(sql) # 提交
conn.commit() # 关闭
cursor.close()
conn.close()

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插入一个username  password

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views.py中的auth函数

def auth(request):
from urllib.parse import parse_qs # 分割取参数
try:
request_body_size = int(request.get('CONTENT_LENGTH',0))
except (ValueError):
request_body_size = 0 request_body = request['wsgi.input'].read(request_body_size)
data = parse_qs(request_body) user = data.get(b'username')[0].decode('utf8')
pwd = data.get(b'password')[0].decode('utf8') # 连接数据库
import pymysql
conn = pymysql.connect(
host='127.0.0.1',
port=3306,
user='root',
passwd='root',
db='db61',
charset='utf8'
)
# 创建游标
cursor = conn.cursor() # 执行sql
sql = "select * from userinfo where name='%s' and password='%s'" % (user, pwd)
cursor.execute(sql) if cursor.fetchone(): # 执行成功,返回一条信息
result = index(request) # 登录成功,进入index页面
return result
else:
return 'Error username or passwrod'.encode('utf8')

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5、总结

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