Source code for scrapy.mail

"""
Mail sending helpers

See documentation in docs/topics/email.rst
"""
import logging
from email import encoders as Encoders
from email.mime.base import MIMEBase
from email.mime.multipart import MIMEMultipart
from email.mime.nonmultipart import MIMENonMultipart
from email.mime.text import MIMEText
from email.utils import COMMASPACE, formatdate
from io import BytesIO

from twisted.internet import defer, ssl

from scrapy.utils.misc import arg_to_iter
from scrapy.utils.python import to_bytes


logger = logging.getLogger(__name__)


def _to_bytes_or_none(text):
    if text is None:
        return None
    return to_bytes(text)


[docs]class MailSender: def __init__(self, smtphost='localhost', mailfrom='[email protected]', smtpuser=None, smtppass=None, smtpport=25, smtptls=False, smtpssl=False, debug=False): self.smtphost = smtphost self.smtpport = smtpport self.smtpuser = _to_bytes_or_none(smtpuser) self.smtppass = _to_bytes_or_none(smtppass) self.smtptls = smtptls self.smtpssl = smtpssl self.mailfrom = mailfrom self.debug = debug
[docs] @classmethod def from_settings(cls, settings): return cls(settings['MAIL_HOST'], settings['MAIL_FROM'], settings['MAIL_USER'], settings['MAIL_PASS'], settings.getint('MAIL_PORT'), settings.getbool('MAIL_TLS'), settings.getbool('MAIL_SSL'))
[docs] def send(self, to, subject, body, cc=None, attachs=(), mimetype='text/plain', charset=None, _callback=None): from twisted.internet import reactor if attachs: msg = MIMEMultipart() else: msg = MIMENonMultipart(*mimetype.split('/', 1)) to = list(arg_to_iter(to)) cc = list(arg_to_iter(cc)) msg['From'] = self.mailfrom msg['To'] = COMMASPACE.join(to) msg['Date'] = formatdate(localtime=True) msg['Subject'] = subject rcpts = to[:] if cc: rcpts.extend(cc) msg['Cc'] = COMMASPACE.join(cc) if charset: msg.set_charset(charset) if attachs: msg.attach(MIMEText(body, 'plain', charset or 'us-ascii')) for attach_name, mimetype, f in attachs: part = MIMEBase(*mimetype.split('/')) part.set_payload(f.read()) Encoders.encode_base64(part) part.add_header('Content-Disposition', 'attachment', filename=attach_name) msg.attach(part) else: msg.set_payload(body) if _callback: _callback(to=to, subject=subject, body=body, cc=cc, attach=attachs, msg=msg) if self.debug: logger.debug('Debug mail sent OK: To=%(mailto)s Cc=%(mailcc)s ' 'Subject="%(mailsubject)s" Attachs=%(mailattachs)d', {'mailto': to, 'mailcc': cc, 'mailsubject': subject, 'mailattachs': len(attachs)}) return dfd = self._sendmail(rcpts, msg.as_string().encode(charset or 'utf-8')) dfd.addCallbacks(self._sent_ok, self._sent_failed, callbackArgs=[to, cc, subject, len(attachs)], errbackArgs=[to, cc, subject, len(attachs)]) reactor.addSystemEventTrigger('before', 'shutdown', lambda: dfd) return dfd
def _sent_ok(self, result, to, cc, subject, nattachs): logger.info('Mail sent OK: To=%(mailto)s Cc=%(mailcc)s ' 'Subject="%(mailsubject)s" Attachs=%(mailattachs)d', {'mailto': to, 'mailcc': cc, 'mailsubject': subject, 'mailattachs': nattachs}) def _sent_failed(self, failure, to, cc, subject, nattachs): errstr = str(failure.value) logger.error('Unable to send mail: To=%(mailto)s Cc=%(mailcc)s ' 'Subject="%(mailsubject)s" Attachs=%(mailattachs)d' '- %(mailerr)s', {'mailto': to, 'mailcc': cc, 'mailsubject': subject, 'mailattachs': nattachs, 'mailerr': errstr}) def _sendmail(self, to_addrs, msg): # Import twisted.mail here because it is not available in python3 from twisted.internet import reactor from twisted.mail.smtp import ESMTPSenderFactory msg = BytesIO(msg) d = defer.Deferred() factory = ESMTPSenderFactory(self.smtpuser, self.smtppass, self.mailfrom, to_addrs, msg, d, heloFallback=True, requireAuthentication=False, requireTransportSecurity=self.smtptls) factory.noisy = False if self.smtpssl: reactor.connectSSL(self.smtphost, self.smtpport, factory, ssl.ClientContextFactory()) else: reactor.connectTCP(self.smtphost, self.smtpport, factory) return d