单进程-单线程-非阻塞-长链接
import socket
import re
def service_client(new_socket):
# '''为这个客户端返回数据'''
# 1.接收浏览器发送出来的请求，即HTTP请求
# GET/HTTP/1.1
#.....
request_lines = request.splotlines()
print ('')
print ('>>>' *30)
print (request_lines)
ret = re.match(r'[^/]+（/[^ ]*)', request_lines[0])#正则提取
file_name =''
if ret:
file_name = ret.group(1)
print ('*' *50, file_name)# !!!!!!!!网页名字
if file_name ='/index.html'
# 2.返回HTTP格式的数据给浏览器
try:
f =open('.../Desktop/项目/项目.html', 'rb')
# f = open('.../Desktop/项目/项目.html' +file_name,'rb')
except:
response ='HTTP/1.1 404 NOT FOUND\r\n'
response +='\r\n'
response +='--FILE NOT FOUND---'
new_socket.send(response.encode('utf-8'))
else:
html_content = f.read()
f.close()
# 2.1 准备发送给浏览器的Header
response_header ='HTTP/1.1 200 OK\r\n'
response_header +='\r\n'
response_header ='Content-Length : %d\r\n'%len(response_body)
response_header +='\r\n'
response = response_header.encode('utf-8')+ response_body
#将 Response发送给浏览器
new_socket.send(response)
def main():
#用来完成整提的控制
# 1.创建套接字
tcp_server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
tcp_server_socket.setsockopt(socket.SOCK_STREAM, socket.SO_REUSEADDR,1)
# 2.绑定
tcp_server_socket.bind(('', 7890))
# 3.变为监听套接字(最大链接书128)
tcp_server_socket.listen(128)
while True:
# 4.等待新客户端的链接
try:
new_socket, client_addr = tcp_server_socket.accept()
# 局部变量
except Exception as ret:
pass
else:
new_socket.setblocking(False)
client_socket_list.append(new_socket)
for client_socketin client_socket_list:
try:
recv_data = client_socket.recv(1024).dacode('utf-8')
except Exception as ret:
pass
else:
if recv_data:
# 5.为这个客户端服务
service_client(client_socket,recv_data)
else:
client_socket.close()
client_socket_list.remove(client_socket)
# 6.关闭监听套接字
tcp_server_socket.close()
if __name__ =='__main__':
main()
epoll实现http服务器
import socket
import re
import select
def service_client(new_socket):
# '''为这个客户端返回数据'''
# 1.接收浏览器发送出来的请求，即HTTP请求
# GET/HTTP/1.1
#......
request_lines = request.splotlines()
print ('')
print ('>>>' *30)
print (request_lines)
ret = re.match(r'[^/]+（/[^ ]*)', request_lines[0])#正则提取
file_name =''
if ret:
file_name = ret.group(1)
print ('*' *50, file_name)# !!!!!!!!网页名字
if file_name ='/index.html'
# 2.返回HTTP格式的数据给浏览器
try:
f =open('.../Desktop/项目/项目.html', 'rb')
# f = open('.../Desktop/项目/项目.html' +file_name,'rb')
except:
response ='HTTP/1.1 404 NOT FOUND\r\n'
response +='\r\n'
response +='--FILE NOT FOUND---'
new_socket.send(response.encode('utf-8'))
else:
html_content = f.read()
f.close()
# 2.1 准备发送给浏览器的Header
response_header ='HTTP/1.1 200 OK\r\n'
response_header +='\r\n'
response_header ='Content-Length : %d\r\n'%len(response_body)
response_header +='\r\n'
response = response_header.encode('utf-8')+ response_body
#将 Response发送给浏览器
new_socket.send(response)
def main():
#用来完成整提的控制
# 1.创建套接字
tcp_server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
tcp_server_socket.setsockopt(socket.SOCK_STREAM, socket.SO_REUSEADDR,1)
# 2.绑定
tcp_server_socket.bind(('', 7890))
# 3.变为监听套接字(最大链接书128)
tcp_server_socket.listen(128)
tcp_server_socket.setblocking(False)#将套接字变为非阻塞
#创建一个epoll对象
epl = select.epoll()
#将监听套接字对应的FD注册到epoll中
epl.register(tcp_server_socket.fileno(),select.EPOLLIN)
client_socket_list =list()
while True:
fd_event_list = epl.poll()#默认会阻塞，直到os检测到数据到来，
# 通过事件通知的方式告诉程序，此时才会解阻塞
# [(fd ,event),(...)]
#参数fd：套接字对应的文件描述符
#参数event：这个fd是什么事件，例如可以调用recv 接收等
for fd,eventin fd_event_list:
# 4.等待新客户端的链接
if fd == tcp_server_socket.fileno():
new_socket,client_addr = tcp_server_socket.accept()
epl.register(new_socket.fileno(),select.EPOLLIN)
elif event == select.EPOLLIN:
#判断已经连接的客户端是否有数据发送过来
recv_data = client_socket.recv(1024).decode('utf-8')
if recv_data:
#为这个客户端服务
service_client(fd_event_dict[fd],recv_data)
else:
fd_event_list[fd].close()
epl.unregister(fd)
del fd_event_dict[fd]
# 6.关闭监听套接字
tcp_server_socket.close()
if __name__ =='__main__':
main()
epoll的原理
使用了内存映射技术 mmap
epoll采用基于事件的就绪通知方式
（共享内存，事件通知）