__author__ = "Alex Li"
import hashlib
import socket ,os,time
server = socket.socket()
server.bind(('0.0.0.0',9999) )
server.listen()
while True:
    conn, addr = server.accept()
    print("new conn:",addr)
    while True:
        print("等待新指令")
        data = conn.recv(1024)
        if not data:
            print("客户端已断开")
            break
        cmd,filename = data.decode().split()
        print(filename)
        if os.path.isfile(filename):
            f = open(filename,"rb")
            m = hashlib.md5()
            file_size = os.stat(filename).st_size
            conn.send( str(file_size).encode() ) #send file size
            conn.recv(1024)  #wait for ack #等待服务器确认
            # infoes = conn.recv(1024)
            # print("info",infoes)
            for line in f:
                m.update(line)
                conn.send(line)
            print("file md5", m.hexdigest())
            f.close()
            conn.send(m.hexdigest().encode()) #send md5
        print("send done")
server.close()