import re
import socket


def service_cilent(new_socket):
  request = new_socket.recv(1024).decode("utf-8")
  # Python splitlines() 按照行('\r','\r\n',\n')分隔，返回一個包含各行作為元素的列表，如果引數 keepends 為 False，不包含換行符，如果為 True，則保留換行符。
  request_lines = request.splitlines()
  print(request_lines)
  file_name = ""
  ret = re.match(r"[^/]+(/[^ ]*)",request_lines[0])
  if ret:
    file_name = ret.group(1)
    if file_name == "/":
      file_name = "index.html"
  try:
    f = open(file_name,"rb")
  except:
    response = "HTTP/1.1 404 NOT FOUND\r\n\r\n"
    response += "------file not found-----"
    new_socket.send(response.encode("utf-8"))
  else:
    # 開啟檔案成功就讀檔案 然後關閉檔案指標
    html_content = f.read()
    f.close()
    # 準備傳送給瀏覽器的資料---header
    response = "HTTP/1.1 200 OK\r\n\r\n"
    # 將response header傳送給瀏覽器
    new_socket.send(response.encode("utf-8"))
    # 將response body傳送給瀏覽器
    new_socket.send(html_content)
  # 關閉套接字
  new_socket.close()


def main():
  # 建立套接字
  tcp_server_socket = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
  # tcp_server_socket.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)
  # 繫結
  tcp_server_socket.bind(("",7089))
  # 監聽套接字
  tcp_server_socket.listen(128)
  while True:
    new_socket,cilent_addr = tcp_server_socket.accept()
    service_cilent(new_socket)
  # 關閉監聽套接字
  tcp_server_socket.close()


if __name__ == '__main__':
  main()

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