89 lines
3.3 KiB
Python
89 lines
3.3 KiB
Python
import re
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class Protocol:
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RX_DIGIT = r"[0-9]"
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RX_SIZE = r"(" + RX_DIGIT + "{1,10})"
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RX_LINE = r"(\\x0d\\x0a){0,1}"
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RX_PASSCHAR = r"[\x22-\xff]"
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RX_BL = r" "
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RX_FILENAME = r"(" + RX_PASSCHAR + "{1,20})"
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RX_SIGNOK = r"SIGN_OK" + RX_LINE
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RX_SIGNERROR = r"SIGN_ERROR" + RX_LINE
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RX_FILES = r"FILES((" + RX_BL + RX_FILENAME + "!" + RX_SIZE + "){0,50})" + RX_LINE
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RX_SAVEFILEOK = r"SAVEFILE_OK" + RX_LINE
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RX_SAVEFILEERROR = r"SAVEFILE_ERROR" + RX_LINE
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RX_GETFILEOK = r"GETFILE_OK" + RX_BL + RX_FILENAME + RX_BL + RX_SIZE + RX_LINE
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RX_GETFILEERROR = r"GETFILE_ERROR" + RX_LINE
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RX_REMOVEFILEOK = r"REMOVEFILE_OK" + RX_LINE
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RX_REMOVEFILEERROR = r"REMOVEFILE_ERROR" + RX_LINE
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ALL_MESSAGES = [RX_SIGNOK, RX_SIGNERROR, RX_FILES, RX_SAVEFILEOK, RX_SAVEFILEERROR, RX_GETFILEOK, RX_GETFILEERROR, RX_REMOVEFILEOK, RX_REMOVEFILEERROR]
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PARSE_UNKNOWN = -1
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PARSE_SIGNOK = 0
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PARSE_SIGNERROR = 1
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PARSE_FILES = 2
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PARSE_SAVEFILEOK = 3
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PARSE_SAVEFILEERROR = 4
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PARSE_GETFILEOK = 5
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PARSE_GETFILEERROR = 6
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PARSE_REMOVEFILEOK = 7
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PARSE_REMOVEFILEERROR = 8
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MSG_CLIENT_SIGNIN = "SIGNIN <login> <password>\r\n"
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MSG_CLIENT_SIGNUP = "SIGNUP <login> <password>\r\n"
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MSG_CLIENT_FILELIST = "FILELIST\r\n"
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MSG_CLIENT_SAVEFILE = "SAVEFILE <filename> <size>\r\n"
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MSG_CLIENT_GETFILE = "GETFILE <filename>\r\n"
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MSG_CLIENT_REMOVEFILE = "REMOVEFILE <filename>\r\n"
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MSG_CLIENT_SIGNOUT = "SIGNOUT\r\n"
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def build_SIGNIN(self, login, password):
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return Protocol.MSG_CLIENT_SIGNIN.replace("<login>", login).replace("<password>", password)
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def build_SIGNUP(self, login, password):
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return Protocol.MSG_CLIENT_SIGNUP.replace("<login>", login).replace("<password>", password)
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def build_FILELIST(self):
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return Protocol.MSG_CLIENT_FILELIST
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def build_SAVEFILE(self, filename, size):
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return Protocol.MSG_CLIENT_SAVEFILE.replace("<filename>", filename).replace("<size>", str(size))
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def build_GETFILE(self, filename):
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return Protocol.MSG_CLIENT_GETFILE.replace("<filename>", filename)
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def build_REMOVEFILE(self, filename):
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return Protocol.MSG_CLIENT_REMOVEFILE.replace("<filename>", filename)
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def build_SIGNOUT(self):
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return Protocol.MSG_CLIENT_SIGNOUT
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def parse(self, line, debug_enabled):
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for i in range(len(Protocol.ALL_MESSAGES)):
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if(re.match(Protocol.ALL_MESSAGES[i], line) != None):
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if(debug_enabled):
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print("OK REGEXP:" + Protocol.ALL_MESSAGES[i])
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return i
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else:
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if(debug_enabled):
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print("KO REGEXP:" + Protocol.ALL_MESSAGES[i])
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return Protocol.PARSE_UNKNOWN
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def parse_FILES(self, line):
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if(self.parse(line, False) == Protocol.PARSE_FILES):
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tokens = re.match(Protocol.RX_FILES, line)
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return [tokens[1]]
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return None
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def parse_GETFILEOK(self, line):
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if(self.parse(line, False) == Protocol.PARSE_GETFILEOK):
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tokens = re.match(Protocol.RX_GETFILEOK, line)
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return [tokens[1], tokens[2]]
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return None
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if __name__ == '__main__':
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protocol = Protocol()
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line = input("> ")
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while(line != ""):
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val = protocol.parse(line, True)
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print("Val =" + str(val))
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line = input("> ") |