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email_parser.py
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email_parser.py
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import re
import quopri
import base64
import os
from encodings.aliases import aliases
import attachment
class Parser:
def __init__(self, email, id_, save=False):
self.message = email
self.id_ = id_ - 1
self.save = save
# print(email)
# return
# self.subject = self.get_subject()
self.info = {}
# self.header_parse(self.message, self.info)
self.get_info(self.message, self.info)
# self.header_parse(self.message, self.info)
# self.to = self.info["To"]
self.subject = (Parser.get_decoded_string(self.info["subject"],
info=self.info)
if "subject" in self.info else "No subject")
self.from_ = self.get_from_to("From").strip()
self.to = self.get_from_to("To").strip()
self.date = self.info["date"] if "date" in self.info else "No date"
self.text = "\r\n\r\n".join(self.message.split("\r\n\r\n")[1:]).strip()
# print(self.message)
self.parts = [x.strip() for x in self.get_parts(self.message)[1:]]
# print(len(self.parts))
if not self.parts:
self.handle_singlepart()
self.parts[-1] = '\r\n'.join(self.parts[-1].split("\r\n")[:-2]).strip()
self.text = self.get_text()
self.attachments = self.get_attachments()
self.attacments_names = '\r\n'.join([att.filename for att in self.attachments])
if self.save:
self.save_message()
@staticmethod
def get_info(message, info):
return attachment.Attachment.header_parse(message, info)
@staticmethod
def find(headers_value):
return re.findall(
r'=\?([a-zA-Z0-9-]+)\?([bqBQ])'
r'\?([a-zA-Z0-9\[/_:,\."\]!+=#-]{4,})={0,2}\?', headers_value,
re.MULTILINE)
def get_from_to(self, param):
param = param.lower()
if param not in self.info:
return "Not implemented field"
pair = [x for x in self.info[param].split('<') if len(x) > 0]
name = pair[0]
addr = pair[1][:-1] if len(pair) > 1 else ""
name = self.get_decoded_string(name, subject=False, info=self.info)
return " ".join((name, addr))
@staticmethod
def get_decoded_string(input_string, subject=True, info=None):
found = Parser.find(input_string)
# print("----------------------------")
# print(found)
if not found:
if subject:
return info['subject'].strip()
return input_string
res = ''
if found[0][1].upper() == "B":
try:
res = ''.join([base64.b64decode(found[i][2]).decode(found[i][0])
for i in range(len(found))])
return res
except UnicodeDecodeError:
for part in found:
if part[1].upper() == "B":
res += (part[2].strip())
res = Parser.decode_b64(res, found[0][0])
else:
for part in found:
res += Parser.decode_quopri(part[2].strip(), part[0])
return res
@staticmethod
def header_parse(message, info):
header = message.split('\r\n\r\n')[0].split('\r\n')[1:]
attachment.Attachment.filling_dictionary(header, info)
def get_text(self):
for num, part in enumerate(self.parts):
if "content-type: text/" in part.lower():
break
text = self.parse_part(part)
# print(text)
# print("PART!:", part)
if not text:
# import pprint
# pprint.pprint(self.parts)
return "No text in the message"
encoding, charset = self.get_text_info()
# print(text)
# print(encoding, charset)
if encoding != "None":
if encoding.lower() == 'base64':
text = text.replace('\r\n', '')
return self.decode_b64(text, charset)
elif encoding.lower() == 'quoted-printable':
# text = text.replace('\r\n', '') #
# print(text)
try:
return self.decode_quopri(text, charset)
except ValueError:
return text
else:
return text
else:
return text
def parse_part(self, part):
return '\r\n\r\n'.join(part.split('\r\n\r\n')[1:])
def get_text_info(self):
for part in self.parts:
if "content-type: text/" in part.lower():
# print("PART!:", part)
info = dict()
attachment.Attachment.header_parse(part, info)
ctype = "Content-Type"
if 'content-type' in info:
ctype = 'content-type'
elif ctype not in info:
ctype = "Content-type"
charset_index = info[ctype].find('charset=') + len(
'charset=')
info[ctype] = info[ctype][charset_index:]
index_end = info[ctype].find(';')
if index_end == -1:
index_end = len(info[ctype])
charset = info[ctype][:index_end].replace('"', '')
cde = "Content-Transfer-Encoding"
if cde in info:
content_transfer_encoding = info[cde].strip()
elif cde.lower() in info:
content_transfer_encoding = info[cde.lower()].strip()
elif cde in self.info:
content_transfer_encoding = self.info[cde].strip()
elif cde.lower() in self.info:
content_transfer_encoding = self.info[cde.lower()].strip()
else:
content_transfer_encoding = "None"
# print("ENCODING:", content_transfer_encoding)
return content_transfer_encoding, charset
def get_parts(self, text):
# print(text)
b = "boundary="
index_of_bound = text.find(b) + len(b)
text = text[index_of_bound:]
index_of_bound_end = text.find('\r\n')
boundary = text[:index_of_bound_end].replace('"', '')\
.strip()\
.replace(';', '')
# print('BOUND', repr(boundary))
parts = re.split(r"--" + boundary + r"[^-]", text)
# pprint(parts)
# print('-------------------------------------------------------')
# if 'multipart' in parts[0]:
# parts[1] = parts[0] + parts[1]
# parts = parts[1:]
# print('here:', len(parts))
result = []
for part in parts:
if "multipart" not in part:
result.append(part)
else:
result += self.get_parts(part)
# print("!!!!!!", len(result))
# print(result)
# print('PARTS:', len(result))
return result
def handle_singlepart(self):
bound = "Content-Type:"
bound2 = "Content-type:"
if bound not in self.message:
bound = bound.lower()
if bound not in self.message:
bound = bound2
text = bound + bound.join(self.message.split(bound)[1:])
self.parts.append(text)
def get_attachments(self):
att = "Content-Disposition: attachment"
parts_with_att = list()
for part in self.parts:
if att in part or att.lower() in part:
parts_with_att.append(part)
attchmts = list()
for part in parts_with_att:
attchmts.append(attachment.Attachment(part, self.id_, self.save))
return attchmts
@staticmethod
def decode_b64(string, charset):
return base64.b64decode(string).decode(charset, 'replace')
@staticmethod
def decode_quopri(string, charset):
# print(list(aliases.items()))
# if charset.lower() != 'koi8-r':
charset = charset.replace('-', '_').lower()
if charset not in aliases.keys() and charset not in aliases.values():
# print(1111111)
return quopri.decodestring(string).decode(errors='replace')
return quopri.decodestring(string).decode(charset, 'replace')
def save_message(self):
path = os.path.abspath(os.curdir)
path += '/' + "Messages"
if not os.path.exists(path):
os.mkdir(path)
path += '/' + str(self.id_) + '/'
if not os.path.exists(path):
os.mkdir(path)
with open(path + str(self.id_) + ".txt", 'w') as file_object:
file_object.write(str(self))
def __str__(self):
string = "Number: " + str(self.id_) + '\r\n'
if not self.attachments:
string += ("From: " + self.from_ + '\nTo: ' + self.to +
'\nDate: ' + self.date + '\nSubject: '
+ self.subject + '\nMessage:\n' + self.text + '\r\n\r\n')
else:
string += ("From: " + self.from_ + '\nTo: ' + self.to +
'\nDate: ' + self.date + '\nSubject: ' +
self.subject + '\nMessage:\n' + self.text +
"\r\n\r\nAttachments:\r\n" +
self.attacments_names + '\r\n\r\n')
return string
# if __name__ == "__main__":
# # pop = pop3.POP3("pop.rambler.ru")
# pop = pop3.POP3("pop.yandex.ru")
# # user = 'pop3-test@rambler.ru'
# # psw = 'pop3test'
# user = 'lyceum0960@yandex.ru'
# psw = 'vbauvbui'
#
# pop.user(user)
# pop.pass_(psw)
# print(Parser(pop.retr()))
# # pop.dele(36)
# pop.quit()
# # for msg in pop.get_several_messages(1, 36):
# # p = Parser(msg)
# # print(p)
# # print(p.subject)