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"""Email backend that writes messages to a file."""
import datetime
import os
from django.conf import settings
from django.core.exceptions import ImproperlyConfigured
from django.core.mail import InvalidMailer
from django.core.mail.backends.console import EmailBackend as ConsoleEmailBackend
class EmailBackend(ConsoleEmailBackend):
def __init__(self, fail_silently=False, file_path=None, **kwargs):
self._fname = None
# Since we're using the console-based backend as a base, force the
# stream to be None, so we don't default to stdout.
kwargs["stream"] = None
super().__init__(fail_silently=fail_silently, **kwargs)
# RemovedInDjango70Warning.
if self.alias is None:
# Use deprecated settings when MAILERS not enabled.
if file_path is not None:
self.file_path = file_path
else:
self.file_path = getattr(settings, "EMAIL_FILE_PATH", None)
if self.file_path is None:
raise ImproperlyConfigured(
"The EMAIL_FILE_PATH setting must be set to use the file "
"EmailBackend."
)
self.file_path = os.path.abspath(self.file_path)
try:
os.makedirs(self.file_path, exist_ok=True)
except FileExistsError:
raise ImproperlyConfigured(
"Path for saving email messages exists, but is not a directory: %s"
% self.file_path
)
except OSError as err:
raise ImproperlyConfigured(
"Could not create directory for saving email messages: %s (%s)"
% (self.file_path, err)
)
# Make sure that self.file_path is writable.
if not os.access(self.file_path, os.W_OK):
raise ImproperlyConfigured(
"Could not write to directory: %s" % self.file_path
)
return
if file_path is None:
raise InvalidMailer("OPTIONS must define 'file_path'.", alias=self.alias)
self.file_path = os.path.abspath(file_path)
try:
os.makedirs(self.file_path, exist_ok=True)
except FileExistsError:
raise InvalidMailer(
f"'file_path' is not a directory: {self.file_path}",
alias=self.alias,
)
except OSError as err:
raise InvalidMailer(
f"Could not create 'file_path': {self.file_path} ({err})",
alias=self.alias,
)
if not os.access(self.file_path, os.W_OK):
raise InvalidMailer(
f"'file_path' is not writable: {self.file_path}",
alias=self.alias,
)
def write_message(self, message):
self.stream.write(message.message().as_bytes() + b"\n")
self.stream.write(b"-" * 79)
self.stream.write(b"\n")
def _get_filename(self):
"""Return a unique file name."""
if self._fname is None:
timestamp = datetime.datetime.now().strftime("%Y%m%d-%H%M%S")
fname = "%s-%s.log" % (timestamp, abs(id(self)))
self._fname = os.path.join(self.file_path, fname)
return self._fname
def open(self):
if self.stream is None:
self.stream = open(self._get_filename(), "ab")
return True
return False
def close(self):
try:
if self.stream is not None:
self.stream.close()
finally:
self.stream = None
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