来个简单的socket服务端
#!/usr/bin/env python
import socket
def handle_request(client):
buf = client.recv(1024)
client.send("HTTP/1.1 200 OK\r\n\r\n".encode())
client.send('<h1>Hollo,Boy</h1>'.encode())
def main():
sock = socket.socket()
sock.bind(('localhost',80))
sock.listen(5)
while True:
connection, address = sock.accept()
handle_request(connection)
connection.close()
if __name__ == "__main__":
main()
上述通过socket来实现了其本质，而对于真实开发中的python web程序来说，一般会分为两部分：服务器程序和应用程序。服务器程序负责对socket服务器进行封装，并在请求到来时，对请求的各种数据进行整理。应用程序则负责具体的逻辑处理。
python标准库提供的独立WSGI服务器称为wsgiref
WSGI（Web Server Gateway Interface）是一种规范，它定义了使用python编写的web app与web server之间接口格式，实现web app与web server间的解耦。
from wsgiref.simple_server import make_server
def RunServer(environ, start_response):
start_response('200 OK', [('Content-Type', 'text/html')])
return [bytes('<h1>Hello, web!</h1>', encoding='utf-8'), ]
if __name__ == '__main__':
httpd = make_server('', 8000, RunServer)
print("Serving HTTP on port 8000...")
httpd.serve_forever()
自定义web框架
通过python标准库提供的wsgiref模块开发一个自己的Web框架
#!/usr/bin/env python
#coding:utf-8
from wsgiref.simple_server import make_server
def index():
return ['index',]
def login():
return ['login',]
def routers():
urlpatterns = (
('/index/',index),
('/login/',login),
)
return urlpatterns
def RunServer(environ, start_response):
start_response('200 OK', [('Content-Type', 'text/html')])
url = environ['PATH_INFO']
urlpatterns = routers()
func = None
for item in urlpatterns:
if item[0] == url:
func = item[1]
break
if func:
return func()
else:
return [b'404 not found',]
if __name__ == '__main__':
httpd = make_server('', 8000, RunServer)
print("Serving HTTP on port 8000...")
httpd.serve_forever()
