# ### server
Import hashlib
Import socket
Import json
DEF get_md5_code (usr, pwd):
# username salt thereof as an encryption Key
HM = hashlib.md5 (usr.encode ())
hm.update(pwd.encode())
res = hm.hexdigest()
return res
sk = socket.socket, (),
sk.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)
sk.bind( ("127.0.0.1",9000) )
sk.listen()
conn,addr = sk.accept()
# Processing data transceiver logic
# to accept a binary byte stream -> String
MSG = conn.recv (1024 ) .decode ()
Print (MSG, type (MSG))
# string -> dictionary
DIC = json.loads (msg)
Print (dic, of the type (dic))
# Identifier, default False
Sign = False
with open("userinfo.txt",mode="r",encoding="utf-8") as fp:
for line in fp:
usr, pwd = line.strip () Split (. " : " )
IF usr == dic [ " username " ] and pwd == get_md5_code (dic [ " username " ], dic [ " password " ]):
# successful landing return it to the state. 1
RES = { " code " :. 1 }
res_msg = json.dumps(res).encode()
conn.send(res_msg)
# If the login is successful, change the default True
Sign = True
BREAK
IF Sign == False:
# login fails, return a status code of 0
RES = { " code " : 0}
conn.send(json.dumps(res).encode())
# Fourth wave
conn.Close ()
# refunded port
sk.close ()
"""
# Review: file object is an iterator
fp = open("userinfo.txt",mode="r",encoding="utf-8")
from collections import Iterator,Iterable
print( isinstance(fp,Iterator) )
"""