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@amirasaran
Last active February 10, 2023 20:40
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Simple Python EML Parser - extract Attachements, HTML, PlainText
import re
from email import parser, message
from email.header import decode_header
class EmlParser(object):
def __init__(self, email: bytes):
self.parsed = parser.BytesParser().parsebytes(email)
def file_name_extractor(self, text):
regex = r"filename=\"([^(\")]*)\""
matches = re.search(regex, text)
if matches:
result = matches.groups()
return self.decode_mime_words(result[0])
return False
def decode_mime_words(self, s):
return u''.join(
word.decode(encoding or 'utf8') if isinstance(word, bytes) else word
for word, encoding in decode_header(s))
@property
def html(self):
html = self._html()
return html.decode() if html else None
def _html(self, parsed=None):
if parsed is None:
parsed = self.parsed
if parsed.is_multipart():
for item in parsed.get_payload(): # type:message.Message
html = self._html(item)
if html:
return html
elif parsed.get_content_type() == 'text/html':
return parsed.get_payload(decode=True)
return None
@property
def text(self):
text = self._text()
return text.decode() if text else None
def _text(self, parsed=None):
if parsed is None:
parsed = self.parsed
if parsed.is_multipart():
for item in parsed.get_payload(): # type:message.Message
text = self._text(item)
if text:
return text
elif parsed.get_content_type() == 'text/plain':
return parsed.get_payload(decode=True)
return None
def _list_attachments(self, parsed=None):
attachments = []
if parsed is None:
parsed = self.parsed
if parsed.is_multipart():
for item in parsed.get_payload(): # type:message.Message
data = self._list_attachments(item)
if data:
attachments += data
elif parsed.get_content_type().startswith('application/'):
attachments.append({
"content_type": parsed.get_content_type(),
"file_name": self.file_name_extractor(parsed.get('Content-Disposition')),
"payload": parsed.get_payload(decode=True)
})
return attachments
@property
def list_attachments(self):
return self._list_attachments()
def get_file_by_index(self, index):
return self.list_attachments[index]
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