#coding:utf-8
import socket
import multiprocessing
import re


HTML_ROOT_DIR = "./html"

class HTTPServer(object):

  #初始化
  def __init__(self):
    self.serversocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    self.serversocket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)


  #開啟服務器啟動進程
  def start(self):
    self.serversocket.listen(128)
    while True:
      clintsocket, addree = self.serversocket.accept()
      hanlderprogess = multiprocessing.Process(target=self.xiexi, args=(clintsocket,))
      hanlderprogess.start()
      clintsocket.close()

  #綁定端口
  def bind(self,port):
    self.serversocket.bind(("", port))


  #獲取請求頭，進行解析，同時發送相應頭
  def xiexi(clserver):
    date = clserver.recv(1024)
    print date
    list = str(date).split("\r\n")
    # 解析
    requesthead = list[0]
    print requesthead
    #使用正則表達式解析出請求頭的文件名稱
    file = re.match(r"\w+ +(/[^ ]*) ",requesthead).group(1)

    #對獲取的問題名判斷，如果是／的就進行顯示index.html
    if "/"==file:
      file = "/index.html"
    try:
      f = open(HTML_ROOT_DIR+file,"rb")
    except:
      response_start_line = "HTTP/1.1 200 OK \r\n"
      response_headers = "Server:My server\r\n"
      response_body = "the file not file"
    else:
      file_date = f.readline()
      f.close()
      response_start_line = "HTTP/1.1 200 OK \r\n"
      response_headers = "Server:My server\r\n"
      response_body = file_date.decode("utf-8")

    response = response_start_line+response_headers+"\r\n"+response_body
    print response
    clserver.send(bytes(response))
    clserver.close()

def main():
  server = HTTPServer()
  server.bind(1001)
  server.start()

if __name__=="__main__":
  main()