GMAIL, subject checking using python.Using IMAP (Python3)

GMAIL, subject checking using python. I thought it would make an interesting post, and I will tell you why. When I was playing with the gmail notifier (about which I posted on earlier), I thought, if I can basically check if a new message has , and if it has, switch on a LED, I can pretty much make everything switch on (or off) over the internet when sending an email. I could for instance switch on an alarm system by sending an email to a gmail account with the code "344alarm2014-on" the python code would pull the email, check the subject an by some logical check switch on the device through GPIO. I can think of dozens of other applications, but let's stick with this one. Let's also stick with switching a LED on or off, to test the code. After that, whatever you want the code to invoke can be bolted on.

#source:http://bitsofpy.blogspot.com.au/2010/05/python-and-gmail-with-imap.html

import imaplib
username="someone@gmail.com"
password="somedude"

imap_server = imaplib.IMAP4_SSL("imap.gmail.com",993)
imap_server.login(username, password)

imap_server.select('INBOX')


# Count the unread emails
status, response = imap_server.status('INBOX', "(UNSEEN)")
unreadcount = int(response[0].split()[2].strip(').,]'))
print unreadcount

#Now I'm not saying this is a particularly nice way of doing #this, but if you print the response and reverse engineer 
#it you will see how I arrived with that string parsing. 
#Regex would be another option, but I try avoid that unless it is #required. 
#Now lets get a list of the identifiers for each unread message, #I'm going to call it email_ids:

# Search for all new mail
status, email_ids = imap_server.search(None, '(UNSEEN)')
print (email_ids)

def get_emails(email_ids):
    data = []
    for e_id in email_ids:
        _, response = imap_server.fetch(e_id, '(UID BODY[TEXT])')
        data.append(response[0][1])
    return data

def get_subjects(email_ids):
    subjects = []
    for e_id in email_ids:
        _, response = imap_server.fetch(e_id, '(body[header.fields (subject)])')
        subjects.append( response[0][1][9:] )
    return subjects

#And I often search for emails from someone in particular, I can #do that easily from Python as well:

def emails_from(name):
    '''Search for all mail from name'''
    status, response = imap_server.search(None, '(FROM"%s")'%name)
    email_ids = [e_id for e_id in response[0].split()]
    print ('Number of emails from %s: %i. IDs: %s' % (name, len(email_ids), email_ids))
    return email_ids



something worth checking:#!/usr/bin/env python

import subprocess, feedparser

DEBUG = 1

USERNAME = "myusername"     # just the part before the @ sign, add yours here
PASSWORD = "mypassword"     

NEWMAIL_OFFSET = 0        # my unread messages goes to zero, yours might not
MAIL_CHECK_FREQ = 60      # check mail every 60 seconds


while True:

        newmails = int(feedparser.parse("https://" + USERNAME + ":" + PASSWORD +"@mail.google.com/gmail/feed/atom/sunset")["feed"]["fullcount"])

        if newmails > NEWMAIL_OFFSET:
                subprocess.call(["python relay-test.py",],shell=True)
        else:
                pass

        time.sleep(MAIL_CHECK_FREQ)

background info:

http://bruno.im/2010/jul/29/europython-talk-python-and-imap-protocol/

https://pythonadventures.wordpress.com/tag/gmail/


gmail python library:

https://github.com/charlierguo/gmail