epoll版本的http服务器

import socket

import re

import select

def service_client(client_socket,request):

"""为客户端服务"""

# 1.提取文件名

request_lines = request.splitlines()

request_first_line = request_lines[0]

file_name = re.match(r"[^/] + (/[^ ]*)",request_first_line).group(1)

if file_name == "/":

file_name = "/index.html"

# 3.根据文件名去读取内容。

try:

with open("./html" + file_name, "rb") as f:

content = f.read()

except Exception as ret:

# 意味着没有这个对应的资源，返回http的应答数据

response_body = "-----file not found-------"

response_header = "HTTP/1.1 404 NOT FOUND\r\n"

response_header += "Content-Length:%d\r\n"%len(response_body)

response_header += "\r\n"

response = respose_header +response_body

client_socket.send(response.encode("utf-8"))

else:

# 意味着有资源，返回http的应答数据

response_body = content

response_header = ‘HTTP/1.1 200 OK\r\n"

response_header += "Content-Length:%d\r\n"%len(response_body)

response_header += "\r\n"

client_socket.send(response_header.encode(:utf-8") + response_body)

def main():

# 1.创建套接字

tcp_s_socket = socket.socket(socket.AF_INET,socket.SOCK_STREAM)

# 2.设置套接字

tcp_s_socket.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)

# 3.绑定本地信息

tcp_s_socket.bind(("",8080))

# 4.设置为监听套接字

tcp_s_socket.listen(128)

# 5.创建一个epoll对象

ep = select.epoll()

ep.register(tcp_s_socket.fileno(),select.EPOLLIN|select.EPOLLIN)

fd_socket_dict = dict()

while True:

# 默认会有堵塞，直到操作系统收到相应的数据到来

# 创建一个列表，里面包含有以元组形式存放的成对的套接字文件标识符和事件名称

fd_event_list = ep.poll()

for fd, event in fd_event_list:

if fd == tcp_s_socket.fileno():

clinet_socket, client_addr = tcp_s_socket.accept()

ep.register(client_socket.fileno(),select.EPOLLIN|select.EPOLLINT)

fd_socket_dict[client_socket.fileno()] = client_socket

elif event == select.EPOLLIN:

recv_data = fd_socket_dict[fd].recv(1024)

if recv_data:

service_client(fd_socket_dict[fd],recv_data.decode("utf-8"))

else:

ep.unregister(fd)

fd_socket_dict[fd].close()

del fd_socket_dict[fd]

# 关闭套接字

tcp_s_socket.close()

if __name__=="__main__":

main()