Google App engine Python 2.5 version of pankratiev / python-amazon-ses-api, using method override

gistfile1.py

#!/usr/bin/python
# -*- coding: utf-8 -*-

from ek_settings import AMAZON_ACCESS_KEY_ID, AMAZON_SECRET_ACCESS_KEY
from amazon_ses import AmazonSES, EmailMessage
from google.appengine.api import urlfetch
from google.appengine.runtime import DeadlineExceededError
import urllib, logging

#===============================================================================================================================
#    GAE vesion of amszon_ses : ovverride performAction and sendMail methods of AmazonSES
#    Added support for 1 or more reply_to addresses
#    No support for sending attachments. For this you have to use another SES API : send raw e-mails 
#===============================================================================================================================

class gaeAmazonSES(AmazonSES):                                                          # make it work on GAE Pyton 2.5                                                        
        
    def _performAction(self, actionName, params=None):
        if not params:
            params = {}
        params['Action'] = actionName        
        #https://email.us-east-1.amazonaws.com/

        reason = ''                                                                     # exception
        retry = 0                                                                       # download error retry
        while retry <= 1 :                                                              # a one time retry        
            try :  
                url = 'https://email.us-east-1.amazonaws.com'
                response = urlfetch.fetch(url=url, payload=urllib.urlencode(params), method=urlfetch.POST, headers=self._getHeaders())
                break
            except (urlfetch.DownloadError, DeadlineExceededError),e :
                logging.debug('Amazon SES download or deadline error : %d' %(retry + 1)) 
                if retry == 0 :
                    retry = retry + 1
                    continue                                                            # retry
                else :
                    reason = e                      
                    break
        
        if reason == '' :                                                               # check for fetch errors          
            responseResult = response.content
            status_code =  response.status_code
            logging.debug(response.headers)
        else :
            responseResult = None
            status_code = -1
        result = self._responseParser.parse(actionName, status_code, reason, responseResult)
        logging.debug(result)
        return result

    def sendEmail(self, source, toAddresses, message, replyToAddresses=None, returnPath=None, ccAddresses=None, bccAddresses=None):
        params = { 'Source': source }
        if not replyToAddresses : replyToAddresses = [source,]                                                        # always reply_to
        for objName, addresses in zip(["ToAddresses", "CcAddresses", "BccAddresses", "ReplyToAddresses" ], 
                                      [toAddresses, ccAddresses, bccAddresses, replyToAddresses]):            
            if addresses:
                if not isinstance(addresses, basestring) and getattr(addresses, '__iter__', False):
                    for i, address in enumerate(addresses):                                                           # change for 2.5
                        if objName == 'ReplyToAddresses' :                                                            # reply_to                                          
                            params['ReplyToAddresses.member.%d' %(i + 1)] = address                                   # change for 2.5
                        else :                                                                                        # destination
                            params['Destination.%s.member.%d' % (objName, i + 1)] = address
                else:
                    if objName == 'ReplyToAddresses' :
                        params['ReplyToAddresses.member.1'] = addresses
                    else :
                        params['Destination.%s.member.1' % objName] = addresses
                  
        if not returnPath:
            returnPath = source
        params['ReturnPath'] = returnPath
        params['Message.Subject.Charset'] = message.charset
        params['Message.Subject.Data'] = message.subject.encode('utf-8')
        if message.bodyText:
            params['Message.Body.Text.Charset'] = message.charset
            params['Message.Body.Text.Data'] = message.bodyText.encode('utf-8')
        if message.bodyHtml:
            params['Message.Body.Html.Charset'] = message.charset
            params['Message.Body.Html.Data'] = message.bodyHtml.encode('utf-8')
        logging.debug(params)
        return self._performAction('SendEmail', params)  
    
def sesMail(sender, mail_to, subject, body_text, reply_to=None, bcc=None):                                      # use the API

    amazonSes = gaeAmazonSES(AMAZON_ACCESS_KEY_ID, AMAZON_SECRET_ACCESS_KEY)                                    # keys in my_settings
    message = EmailMessage()
    
    message.subject = subject
    message.bodyText = body_text  
    result = amazonSes.sendEmail(sender, mail_to, message, reply_to,'returnpath@mydomain.com', None, bcc)
    logging.debug(result)