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uaioftp.py
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uaioftp.py
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import logging
import uos as os
import usocket as _socket
import uasyncio as asyncio
import uerrno
import time
log = logging.getLogger("uaioftpd")
month_alias = ['Jan', 'Feb', 'Mar', 'Apr',
'May', 'Jun', 'Jul', 'Aug',
'Sep', 'Oct', 'Nov', 'Dec']
class uaioftpd:
def __init__(self, loop=None, my_ip="192.168.0.1"):
self.mode = "I"
self.pasv = False
self.loop = loop
self.data_port = 12345
self.ip = my_ip
self.max_chuck_size = 512
async def server(self, reader, writer):
addr = writer.get_extra_info('peername')
log.info("client from {}".format(addr))
await writer.awrite("220 Welcome to WY micro FTP server\r\n")
while True:
data = await reader.readline()
if not data:
log.info("no data, break")
await writer.aclose()
else:
log.info("recv = %s" % data)
data = data.decode("utf-8")
split_data = data.split(' ')
cmd = split_data[0].strip('\r\n')
argument = split_data[1].strip('\r\n') if len(split_data) > 1 else None
log.info("cmd is %s, argument is %s" % (cmd, argument))
if hasattr(self, cmd):
func = getattr(self, cmd)
result = await func(writer, argument)
log.info("result = %d" % result)
if not result:
await writer.aclose()
break
else:
await writer.awrite("520 not implement.\r\n")
async def USER(self, stream, argument):
await stream.awrite("331 Okey.\r\n")
return True
async def PASS(self, stream, argument):
await stream.awrite("230 Okey.\r\n")
return True
async def PWD(self, stream, argument):
try:
cwd = os.getcwd()
await stream.awrite('250 "{}".\r\n'.format(cwd))
except OSError as e:
await stream.awrite('550 {}.\r\n'.format(e))
return True
async def SYST(self, stream, argument):
await stream.awrite("215 ARM cortex M4 MCU.\r\n")
return True
async def CWD(self, stream, argument):
log.info("CWD argument is %s" % argument)
try:
os.chdir(argument)
await stream.awrite("250 Okey.\r\n")
except OSError as e:
await stream.awrite("550 {}.\r\n".format(e))
return True
async def QUIT(self, stream, argument):
await stream.awrite("221 Bye!.\r\n")
return False
async def DELE(self, stream, argument):
try:
os.remove(argument)
await stream.awrite("257 Okey.\r\n")
except OSError as e:
await stream.awrite("550 {}.\r\n".format(e))
return True
async def MKD(self, stream, argument):
try:
os.mkdir(argument)
await stream.awrite("257 Okey.\r\n")
except OSError as e:
await stream.awrite("550 {}.\r\n".format(e))
return True
async def RMD(self, stream, argument):
try:
os.rmdir(argument)
await stream.awrite("257 Okey.\r\n")
except OSError as e:
await stream.awrite("550 {}.\r\n".format(e))
return True
async def CDUP(self, stream, argument):
argument = '..' if not argument else '..'
log.info("CDUP argument is %s" % argument)
try:
os.chdir(argument)
await stream.awrite("250 Okey.\r\n")
except Exception as e:
await stream.awrite("550 {}.\r\n".format(e))
return True
async def TYPE(self, stream, argument):
if argument == "I":
self.mode = "I"
await stream.awrite("200 Binary mode.\r\n")
else:
await stream.awrite("502 {} not implement".format(argument))
return True
async def PORT(self, stream, argument):
argument = argument.split(',')
self.data_ip = '.'.join(argument[:4])
self.data_port = (int(argument[4])<<8)+int(argument[5])
self.data_addr = (self.data_ip, self.data_port)
log.info("got the port {}".format(self.data_addr))
await stream.awrite("220 Got the port.\r\n")
return True
async def PASV(self, stream, argument):
await stream.awrite("550 not support now.\r\n")
return True
async def LIST(self, stream, argument):
await stream.awrite("150 Here comes the directory listing.\r\n")
path = os.getcwd() if argument is None else argument.decode("UTF-8")
if self.pasv is False:
log.info("LIST connecting to %s %d" % (self.data_ip, self.data_port))
reader, writer = await asyncio.open_connection(self.data_ip, self.data_port)
log.info("connection established")
items = os.listdir(path)
if path == '/':
path = ''
for i in items:
file_stat = os.stat(path + "/" + i)
file_date = file_stat[-2]
file_size = file_stat[-4]
file_type = 'd' if file_size == 0 else '-'
format_date = time.localtime(file_date)
await writer.awrite("%srwxrwxrwx user group %10d %s %2d %d:%d %s\r\n" %
(file_type, file_size, month_alias[format_date[1] - 1],
format_date[2], format_date[3], format_date[4], i))
await writer.aclose()
await stream.awrite("226 Directory send okey.\r\n")
return True
async def RETR(self, stream, argument):
max_chuck_size = self.max_chuck_size
buf = bytearray(max_chuck_size)
await stream.awrite("150 Opening data connection\r\n")
if self.pasv is False:
log.info("RETR connecting to %s %d" % (self.data_ip, self.data_port))
reader, writer = await asyncio.open_connection(self.data_ip, self.data_port)
log.info("connection established")
remaining_size = os.stat(argument)[-4]
try:
with open(argument, "rb") if self.mode == "I" else open(argument, "r") as f:
while remaining_size:
chuck_size = f.readinto(buf)
remaining_size -= chuck_size
mv = memoryview(buf)
ret = await writer.awrite(mv[:chuck_size])
await stream.awrite("226 Transfer complete.\r\n")
except OSError as e:
if e.args[0] == uerrno.ENOENT:
await stream.awrite("550 No such file.\r\n")
else:
await stream.awrite("550 Open file error.\r\n")
finally:
await writer.aclose()
del buf
return True
async def STOR(self, stream, argument):
max_chuck_size = self.max_chuck_size
await stream.awrite("150 Opening data connection\r\n")
if self.pasv is False:
log.info("STOR connecting to %s %d" % (self.data_ip, self.data_port))
reader, writer = await asyncio.open_connection(self.data_ip, self.data_port)
log.info("connection established")
try:
with open(argument, "wb") if self.mode == "I" else open(argument, "w") as f:
f.seek(0)
while True:
try:
data = await reader.read(max_chuck_size)
f.write(data)
if not data:
break
except Exception as e:
log.info("exception .. {}".format(e))
await stream.awrite("226 Transfer complete\r\n")
except OSError as e:
await stream.awrite("550 File i/o error.\r\n")
finally:
await writer.aclose()
return True