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sending_message.py
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sending_message.py
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import itertools
import socket
import base64
import ssl
import os
import pathlib
import quopri
import exceptions
import files_work
def mime_message_create(entered_data, files_group=None):
recipients_addresses = ''
if entered_data.open_sending:
recipients_addresses = ', '.join(entered_data.recipients_list)
message = (
'MIME-Version: 1.0\r\n'
'From:{}\r\n'
'To:{}\r\n'
'Subject:{}\r\n'
'Content-Type: multipart/mixed; '
'boundary=gc0p4Jq0M2Yt08jU534c0p\r\n\r\n'
'--gc0p4Jq0M2Yt08jU534c0p\r\n'
'Content-Type: text/plain\r\n'
'Content-Transfer-Encoding: quoted-printable\n\n'
'{}'.format(
entered_data.sender_mail,
recipients_addresses,
entered_data.mail_subject,
(quopri.encodestring(entered_data.message.encode())).decode(
'utf-8'))
).encode()
if not files_group:
for attachment in entered_data.attachments_list:
if not pathlib.Path(attachment).exists():
raise exceptions.IncorrectFileNameError(attachment)
try:
with open(attachment, 'rb') as file:
filename = os.path.basename(pathlib.Path(attachment))
if entered_data.new_attach_name and not entered_data.zip:
filename = entered_data.new_attach_name
elif entered_data.zip:
filename = 'attachments.zip'
file_content = file.read() if not entered_data.zip else \
entered_data.zip_file_content
message += (
'--gc0p4Jq0M2Yt08jU534c0p\r\n'
'Content-Type: application/octet-stream;\r\n'
'Content-Disposition: attachment; filename="{}"\r\n'
'Content-Transfer-Encoding: base64\n\n'.format(
filename).
encode() + base64.b64encode(file_content) + b'\r\n'
)
except IOError as exception:
raise exceptions.FileError(
'{}: {}'.format(type(exception), exception))
else:
for filename, file_content in files_group.items():
if entered_data.new_attach_name and not entered_data.zip:
filename = entered_data.new_attach_name
elif entered_data.zip:
filename = 'attachments.zip'
message += (
'--gc0p4Jq0M2Yt08jU534c0p\r\n'
'Content-Type: application/octet-stream;\r\n'
'Content-Disposition: attachment; filename="{}"\r\n'
'Content-Transfer-Encoding: base64\n\n'.format(
os.path.basename(pathlib.Path(filename))).
encode() + file_content + b'\r\n'
)
message += b'.'
return message
def command_list_create(entered_data, already_authenticated, files_group=None):
if already_authenticated:
begin_part = \
['EHLO {}'.format(entered_data.server_name).encode(),
'MAIL FROM:<{}>'.format(entered_data.sender_mail).encode()]
else:
begin_part = \
['EHLO {}'.format(entered_data.server_name).encode(),
b'AUTH LOGIN',
base64.b64encode(entered_data.sender_mail.encode()),
base64.b64encode(entered_data.sender_password.encode()),
'MAIL FROM:<{}>'.format(entered_data.sender_mail).encode()]
middle_part = \
['RCPT TO:<{}>'.format(recipient).encode()
for recipient in entered_data.recipients_list]
end_part = \
[b'DATA',
mime_message_create(entered_data, files_group),
b'QUIT']
return itertools.chain(begin_part, middle_part, end_part)
def receive_server_response(client):
with client.makefile('rb') as file_repr:
data = []
while True:
line = file_repr.readline()
data.append(line)
if line[3:4] == b' ':
break
return (b''.join(data)).decode()
def debug_display(entered_data, message):
if entered_data.debug:
print(message)
def mail_sending(entered_data):
with ssl.wrap_socket(socket.socket()) as client:
client.connect((entered_data.server_name, entered_data.port_number))
debug_display(entered_data, receive_server_response(client))
commands_sending(client, entered_data)
def commands_sending(client, entered_data):
send_flag = False
attempt_count = 0
max_attempts_count = 2
while attempt_count <= max_attempts_count and not send_flag:
attempt_count += 1
if entered_data.zip:
entered_data.zip_file_content = files_work.zip_archiving(
entered_data)
if entered_data.max_size:
files_groups = files_work.files_groups_for_sending_create(
entered_data)
else:
files_groups = [None]
for group_number in range(len(files_groups)):
already_authenticated = False if group_number == 0 else True
for command in command_list_create(
entered_data, already_authenticated, files_groups[
group_number]):
if (command == b'QUIT' and group_number < len(
files_groups) - 1):
command = b'RSET'
client.sendall(command + b'\r\n')
debug_display(entered_data, command.decode(errors='ignore'))
server_response = receive_server_response(client)
debug_display(entered_data, server_response)
send_flag = True
if (attempt_count <= max_attempts_count and
server_response[0:3] == '535'):
print('\n\rAuthentication failed: Invalid user or '
'password!')
client.sendall(b'RSET\r\n')
debug_display(entered_data, 'RSET')
server_response = receive_server_response(client)
debug_display(entered_data, server_response)
print('Enter sender login again:')
entered_data.entering_sender_email()
entered_data.entering_password()
send_flag = False
break
if int(server_response[0]) in [4, 5]:
raise exceptions.ServerException(server_response)