Python Web静态服务器非堵塞模式实现方法示例

本文实例讲述了Python Web静态服务器非堵塞模式实现方法。分享给大家供大家参考，具体如下：

单进程非堵塞 模型

#coding=utf-8
from socket import *
import time
# 用来存储所有的新链接的socket
g_socket_list = list()
def main():
  server_socket = socket(AF_INET, SOCK_STREAM)
  server_socket.setsockopt(SOL_SOCKET, SO_REUSEADDR , 1)
  server_socket.bind(('', 7890))
  server_socket.listen(128)
  # 将套接字设置为非堵塞
  # 设置为非堵塞后，如果accept时，恰巧没有客户端connect，那么accept会
  # 产生一个异常，所以需要try来进行处理
  server_socket.setblocking(False)
  while True:
    # 用来测试
    time.sleep(0.5)
    try:
      newClientInfo = server_socket.accept()
    except Exception as result:
      pass
    else:
      print("一个新的客户端到来:%s" % str(newClientInfo))
      newClientInfo[0].setblocking(False) # 设置为非堵塞
      g_socket_list.append(newClientInfo)
    for client_socket, client_addr in g_socket_list:
      try:
        recvData = client_socket.recv(1024)
        if recvData:
          print('recv[%s]:%s' % (str(client_addr), recvData))
        else:
          print('[%s]客户端已经关闭' % str(client_addr))
          client_socket.close()
          g_socket_list.remove((client_socket,client_addr))
      except Exception as result:
        pass
    print(g_socket_list) # for test
if __name__ == '__main__':
  main()

web静态服务器-单进程非堵塞

import time
import socket
import sys
import re
class WSGIServer(object):
  """定义一个WSGI服务器的类"""
  def __init__(self, port, documents_root):
    # 1. 创建套接字
    self.server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    # 2. 绑定本地信息
    self.server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
    self.server_socket.bind(("", port))
    # 3. 变为监听套接字
    self.server_socket.listen(128)
    self.server_socket.setblocking(False)
    self.client_socket_list = list()
    self.documents_root = documents_root
  def run_forever(self):
    """运行服务器"""
    # 等待对方链接
    while True:
      # time.sleep(0.5) # for test
      try:
        new_socket, new_addr = self.server_socket.accept()
      except Exception as ret:
        print("-----1----", ret) # for test
      else:
        new_socket.setblocking(False)
        self.client_socket_list.append(new_socket)
      for client_socket in self.client_socket_list:
        try:
          request = client_socket.recv(1024).decode('utf-8')
        except Exception as ret:
          print("------2----", ret) # for test
        else:
          if request:
            self.deal_with_request(request, client_socket)
          else:
            client_socket.close()
            self.client_socket_list.remove(client_socket)
      print(self.client_socket_list)
  def deal_with_request(self, request, client_socket):
    """为这个浏览器服务器"""
    if not request:
      return
    request_lines = request.splitlines()
    for i, line in enumerate(request_lines):
      print(i, line)
    # 提取请求的文件(index.html)
    # GET /a/b/c/d/e/index.html HTTP/1.1
    ret = re.match(r"([^/]*)([^ ]+)", request_lines[0])
    if ret:
      print("正则提取数据:", ret.group(1))
      print("正则提取数据:", ret.group(2))
      file_name = ret.group(2)
      if file_name == "/":
        file_name = "/index.html"
    # 读取文件数据
    try:
      f = open(self.documents_root+file_name, "rb")
    except:
      response_body = "file not found, 请输入正确的url"
      response_header = "HTTP/1.1 404 not found\r\n"
      response_header += "Content-Type: text/html; charset=utf-8\r\n"
      response_header += "Content-Length: %d\r\n" % (len(response_body))
      response_header += "\r\n"
      # 将header返回给浏览器
      client_socket.send(response_header.encode('utf-8'))
      # 将body返回给浏览器
      client_socket.send(response_body.encode("utf-8"))
    else:
      content = f.read()
      f.close()
      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"
      # 将header返回给浏览器
      client_socket.send( response_header.encode('utf-8') + response_body)
# 设置服务器服务静态资源时的路径
DOCUMENTS_ROOT = "./html"
def main():
  """控制web服务器整体"""
  # python3 xxxx.py 7890
  if len(sys.argv) == 2:
    port = sys.argv[1]
    if port.isdigit():
      port = int(port)
  else:
    print("运行方式如: python3 xxx.py 7890")
    return
  print("http服务器使用的port:%s" % port)
  http_server = WSGIServer(port, DOCUMENTS_ROOT)
  http_server.run_forever()
if __name__ == "__main__":
  main()

希望本文所述对大家Python程序设计有所帮助。

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