Connection between AWS(AMAZON WEB SERVICE) SES and sales force using apex code to send file attachment

Question

public with sharing class AWS_SES {

  public String endpoint = 'https://email.us-east-1.amazonaws.com';
  public String method = 'POST';
  public string key;
  public string secret;

  public AWS_SES()
  {
    //Get key and secret from custom setting AWS__c

    AWS__c objKeyDetails = [ Select SecretKey__c, AccessKey__c, Name From AWS__c ] ;
    this.key = objKeyDetails.AccessKey__c;
    this.secret = objKeyDetails.SecretKey__c;
  }

  public void sendEmail(List<String> toAddresses, String fromAddress, String subject, String body)
  {
    //Creating the instance of AWS_EmailFormat class
    AWS_EmailFormat emailUtil = new AWS_EmailFormat();

    //body of that method AWS_EmailDateFormat is defined in AWS_EmailFormat class.
    String AWSEmailDateFormat = emailUtil.AWS_EmailDateFormat(Datetime.now());

    HttpRequest httpReq = new HttpRequest(); 
    httpReq.setEndpoint(endpoint);
    httpReq.setMethod(method);

    //body of that headerForAmazonAuthorization is defined in AWS_EmailFormat class.
    httpReq.setHeader('X-Amzn-Authorization', emailUtil.headerForAmazonAuthorization(this.key, emailUtil.signature(AWSEmailDateFormat, this.secret))); 
    httpReq.setHeader('Content-Type', 'application/x-www-form-urlencoded');
    httpReq.setHeader('Date', AWSEmailDateFormat);

    emailUtil.emailSend(toAddresses, fromAddress, subject, body);

    httpReq.setBody(emailUtil.encodeEmail());

    System.debug('*******BODY*******'+httpReq.getBody()); 

    Http http = new Http();
    HttpResponse response = http.send(httpReq);   

    System.debug('RESPONSE FROM AWS'+response.getBody());
    system.debug('OKAY THATS FINE THANKS!!!');  

By using that code I am able to send email to AWS from salesforce and also I have got the response from AWS. Now I want to add attachment with the email and want to send request to AWS.

How can it be possible. Please give me the suggestion

Answer 1

Looking at the code you provided you'll need to extend your AWS_EmailFormat class to support attachments. From the Amazon SES FAQ.

You can also send email with attachments programmatically. To include an attachment, construct a multipart email message. In this message, include a MIME part that contains an appropriate Content-Type header, along with the MIME-encoded content. Next, use the Content-Disposition header to specify whether the content is to be displayed inline or treated as an attachment.

Unfortunately it seems you'll need to build the MIME part manually yourself which could get pretty dicey with APEX and you'll be limited in the attachment size with the current Salesforce max callout size limit of 3MB. To give you an idea, a PHP developer decided to quit when trying to implement attachments with Amazon SES

After many tries, I got to the conclusion that sending emails to Amazon SES directly from the code is too much pain.