2.动态服务器（WSGI）2.1.简化版动态服务器我们先自己定义一个动态服务器：
import reimport socketclass HTTPServer(object): def __init__(self): with socket.socket() as tcp_server: tcp_server.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) tcp_server.bind(('', 8080)) tcp_server.listen() while True: self.client_socket, self.client_address = tcp_server.accept() self.handle() def response(self, status, body=None): print(status) header = f"HTTP/1.1 {status}\r\n\r\n" with self.client_socket: self.client_socket.send(header.encode("utf-8")) if body: self.client_socket.send(body) def __static_handler(self, name): try: with open(f"./www{name}", "rb") as fs: return fs.read() except Exception as ex: print(ex) return None def __dynamic_handler(self, name): try: m = __import__(name) return m.application().encode("utf-8") except Exception as ex: print(ex) return None def handle(self): with self.client_socket: print(f"[来自{self.client_address}的消息:]\n") data = self.client_socket.recv(2048) if data: header, _ = data.decode("utf-8").split("\r\n", 1) print(header) # GET /xxx HTTP/1.1 ret = re.match("^\w+? (/[^ ]*) .+$", header) if ret: url = ret.groups(1)[0] # Python三元表达式(之前好像忘说了) url = "/index.html" if url == "/" else url print("请求url:", url) body = str() # 动态页面 if ".py" in url: # 提取模块名(把开头的/和.py排除) body = self.__dynamic_handler(url[1:-3]) else: # 静态服务器 body = self.__static_handler(url) # 根据返回的body内容，返回对应的响应码 if body: self.response("200 ok", body) else: self.response("404 Not Found") else: # 匹配不到url（基本上不会发生，不排除恶意修改） self.response((404, "404 Not Found"))if __name__ == "__main__": import sys # 防止 __import__ 导入模块的时候找不到，忘了可以查看： # https://www.cnblogs.com/dotnetcrazy/p/9253087.html#5.自己添加模块路径 sys.path.insert(1, "./www/bin") HTTPServer()
效果： 
代码不难其中有个技术点说下：模块名为字符串怎么导入？
# test.py# 如果模块名是字符串，需要使用__import__s = "time"time = __import__(s)def application(): return time.ctime() # 返回字符串if __name__ == "__main__": time_str = application() print(type(time_str)) print(time_str)
输出：
<class 'str'>Thu Dec 20 22:48:07 2018 |
