一个简单的动态web服务器
程序员文章站
2022-05-08 22:53:58
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这个动态web服务器的思路是在静态服务器的基础上添加对URL的判断,如果URL中带有脚本信息,那么服务器会去执行脚本而不是直接返回静态界面
#-*-coding:utf-8-*-
import sys
import re
from socket import *
from multiprocessing import Process
#设置静态文件根目录
HTTP_ROOT_DIR = "./html"
WSGI_PYTHON_DIR = "./wsgipython"
class HTTPServer(object):
''''''
def __init__(self):
self.tcp_socket = socket(AF_INET, SOCK_STREAM)
self.tcp_socket.setsockopt(SOL_SOCKET, SO_REUSEADDR, 1)
def start(self):
self.tcp_socket.listen(128)
while True:
try:
cli_socket, addrs = self.tcp_socket.accept()
print("%s %s:用户已连接" % (addrs[0], addrs[1]))
p = Process(target=self.handle_client, args=(cli_socket,))
p.start()
cli_socket.close()
except:
print("服务器已经关闭")
cli_socket.close()
tcp_socket.close()
def start_response(self, status, headers):
self.response_start = "HTTP/1.1 " + status + "\r\n"
server_headers = ""
for header in headers:
server_headers += "%s: %s\r\n"%header
self.response_headers = server_headers
def handle_client(self,cli_socket):
# 接收数据
request_data = cli_socket.recv(1024)
# 解析HTTP报文协议 request_data
print("requst_data:", request_data)
# 处理响应数据
request_lines = request_data.splitlines()
print(request_lines)
request_da = request_lines[0]
# 获取用户想要的请求名
file_name = re.match(r"\w+ +(/[^ ]*) ", request_da.decode("utf-8")).group(1)
if file_name.endswith(".py"):
# 处理py文件
m = __import__(file_name[1:-3])
env = {}
response_body = m.application(env, self.start_response)
response_start_line = self.response_start
response_header = self.response_headers
else:
# 判定一下特殊情况,字符串写在左侧可以避免把“==”写成“=”时当成赋值语句
if "/" == file_name:
file_name = "/index.html"
# 打开请求文件
try:
f = open(HTTP_ROOT_DIR + file_name, "rb")
file_data = f.read()
f.close()
except IOError:
response_start_line = "HTTP/1.1 404 Not Found\r\n"
response_header = "Server: My server\r\n"
response_body = "Not Found"
else:
# 构造响应数据
response_start_line = "HTTP/1.1 200 OK\r\n"
response_header = "Server: My server\r\n"
response_body = file_data.decode("utf-8")
response = response_start_line + response_header + "\r\n" + response_body
print("response data:", response)
# 发送数据
cli_socket.send(bytes(response, "utf-8"))
# cli_socket.send(response)
# 关闭套接字
cli_socket.close()
print("链接已经断开")
def bind(self, port):
self.tcp_socket.bind(port)
def main():
sys.path.insert(1,WSGI_PYTHON_DIR)
http_server = HTTPServer()
http_server.bind(("",8000))
http_server.start()
if __name__ == '__main__':
main()
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