aws_ses_raw_msg_without_boto.py

# This code snippet is based on python 3.
from datetime import datetime
from urllib.request import Request, urlopen
from urllib.parse import urlencode
from urllib.error import HTTPError

from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
from email.mime.application import MIMEApplication

import os
import hmac
import base64
import hashlib


# prepare for raw message data
SENDER = 'Sangwon Lee <gamzabaw@gmail.com>'
RECIPIENT = 'youyou@testmail.xxx'
SUBJECT = 'Email Title Here'
ATTACHMENT = '/tmp/some/attachment.txt'
BODY_TEXT = 'TXT body here...'
CHARSET = 'utf-8'

msg = MIMEMultipart('mixed')
msg['Subject'] = SUBJECT 
msg['From'] = SENDER 
msg['To'] = RECIPIENT

textpart = MIMEText(BODY_TEXT.encode(CHARSET), 'plain', CHARSET)
msg_body = MIMEMultipart('alternative')
msg_body.attach(textpart)
msg.attach(msg_body)

att = MIMEApplication(open(ATTACHMENT, 'rb').read())
att.add_header('Content-Disposition','attachment',filename=os.path.basename(ATTACHMENT))
msg.attach(att)

raw_msg_bytes = base64.b64encode(msg.as_string().encode()).decode()

# make a signature of secret key
awsId = '<your-aws-access-id>'
awsSecret = '<your-aws-access-secrey-key>'
dateValue = datetime.utcnow().strftime('%a, %d %b %Y %H:%M:%S GMT')
h = hmac.new(key=awsSecret.encode(), msg=dateValue.encode(), digestmod=hashlib.sha256)

signature = base64.b64encode(h.digest()).decode()

# compose http request header
headers = {
    'X-Amzn-Authorization': 'AWS3-HTTPS AWSAccessKeyId={}, Algorithm=HMACSHA256, Signature={}'.format(awsId, signature),
    'Content-type': 'application/x-www-form-urlencoded',
    'Return-Path': 'gamzabaw@gmail.com',
    'Date': dateValue,
}

# compose parameters for urlencoded form data
params = {
    'Action': 'SendRawEmail',
    'RawMessage.Data': raw_msg_bytes,
}

# send request
AWS_REGION = 'us-east-1'
url = 'https://email.{}.amazonaws.com'.format(AWS_REGION)
req = Request(url, data=urlencode(params).encode(),  headers=headers)
try:
    res = urlopen(req).read()
except HTTPError as e:
    print(e)