from your imap stored mail to line notify

imap2line.py

#!/usr/bin/env python3
# vim:fileencoding=utf-8

""" [NAME] script or package easy description

[DESCRIPTION] script or package description
"""
import os, sys, io
import base64
import email
import email.header
import imaplib
import quopri
import urllib
import urllib.request
import json

LINE_NOTIFY_URL    = 'https://notify-api.line.me/api/notify'
LINE_TOKEN         = 'your_line_token'
LINE_NOTIFY_FORMAT = '''
Subject: {0}
{1}'''

IMAP_HOST    = 'your_imap_host'
IMAP_PORT    = 993
IMAP_USER    = 'your_account'
IMAP_PASS    = 'your_password'
IMAP_FOLDERS = [ "label_or_folder" ]

def notify_line(subject, body):
    form_data = urllib.parse.urlencode({ 'message': LINE_NOTIFY_FORMAT.format(subject, body) })
    form_headers = { 'Content-Type': 'application/x-www-form-urlencoded', 'Authorization': 'Bearer {0}'.format(LINE_TOKEN) }

    req = urllib.request.Request(LINE_NOTIFY_URL, data=form_data.encode(), headers=form_headers, method='POST')
    try:
        with urllib.request.urlopen(req) as res:
            body    = json.loads(res.read())
            status  = body["status"]
            message = body["message"]
    except urllib.error.HTTPError as e:
        status  = e.code
        message = e
    return status, message

def parse(data):
    msg     = email.message_from_bytes(data[0][1])
    decoded = email.header.decode_header(msg["subject"])
    if decoded[0][1] is not None:
        subject = decoded[0][0].decode(decoded[0][1])
    else:
        subject = decoded[0][0]

    if msg.is_multipart():
        part = msg.get_payload()[0]
        charset = part.get_content_charset()
        payload = part.get_payload(decode=True)
    else:
        charset = msg.get_content_charset()
        payload = msg.get_payload(decode=True)

    if charset is None:
        charset = "UTF-8"
    body    = payload.decode(charset).strip()
    return subject, body

def main():

    m = imaplib.IMAP4_SSL(IMAP_HOST, IMAP_PORT)
    m.login(IMAP_USER, IMAP_PASS)
    for folder in IMAP_FOLDERS:
        m.select(folder)
        typ, data = m.search(None, 'ALL')
        for num in data[0].split():

            typ, data = m.fetch(num, '(RFC822)')
            subject, body   = parse(data)
            status, message = notify_line(subject, body)
            print("subject:{0} status:{1} message:{2}".format(subject, status, message))
            if status == 200:
                m.store(num, '+FLAGS', '\\Deleted')

        m.expunge()

    m.close()
    m.logout()
    sys.exit(0)

if __name__ == "__main__":
    main()