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An example to send email with Cloud Pub Sub and Cloud Functions #Rails
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const sendEmail = require('./sendEmail').sendEmail; | |
/** | |
* Deplooyment: | |
* | |
* $ gcloud beta functions deploy sendEmail --trigger-topic sendEmail | |
* | |
*/ | |
/** | |
* Triggered from a message on a Cloud Pub/Sub topic. | |
* | |
* @param {!Object} event The Cloud Functions event. | |
* @param {!Function} The callback function. | |
*/ | |
exports.sendEmail = (event, callback) => { | |
// The Cloud Pub/Sub Message object. | |
const pubsubMessage = event.data; | |
// We're just going to log the message to prove that | |
// it worked. | |
const decoded = Buffer.from(pubsubMessage.data, 'base64').toString(); | |
console.log(decoded); | |
const data = JSON.parse(decoded); | |
sendEmail(data); | |
// Don't forget to call the callback. | |
callback(); | |
}; |
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require "google/cloud/pubsub" | |
# | |
# Configuration: | |
# | |
# environments/production.rb: | |
# | |
# Rails.application.configure do | |
# ... | |
# config.action_mailer.delivery_method = :pub_sub_mailer | |
# end | |
# | |
# initializers/pub_sub_mailer.rb: | |
# | |
# PubSubMailer.config = { | |
# project_id: ENV['GCLOUD_PROJECT_ID'], | |
# credentials: Rails.root.join('service-account-credentials.json') | |
# } | |
# | |
class PubSubMailer | |
class << self | |
attr_accessor :config | |
end | |
def initialize(options = {}) | |
@pubsub = Google::Cloud::Pubsub.new( | |
project_id: self.class.config[:project_id], | |
credentials: self.class.config[:credentials] | |
) | |
end | |
def deliver!(mail) | |
data = { | |
to: Array(mail['to']).join(', '), | |
from: Array(mail['from']).join(', '), | |
cc: Array(mail['cc']).join(', '), | |
bcc: Array(mail['bcc']).join(', '), | |
reply_to: Array(mail['reply_to']).join(', '), | |
subject: mail.subject, | |
html: mail.decoded.to_s, # NOTE: Now only html is supported | |
} | |
@pubsub.topic('sendEmail').publish(data.to_json) | |
Rails.logger.debug(data) | |
rescue => e | |
# TODO: Notify the error | |
Rails.logger.error(e.message) | |
end | |
end | |
ActiveSupport.on_load :action_mailer do | |
ActionMailer::Base.add_delivery_method( | |
:pub_sub_mailer, | |
PubSubMailer | |
) | |
end |
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const nodemailer = require('nodemailer'); | |
const smtpConfig = require('./smtp-config').config; | |
/** | |
* An example of the args | |
* | |
* { to: 'bob@example.com', | |
* from: 'example <noreply@example.com>', | |
* cc: '', | |
* bcc: '', | |
* reply_to: '', | |
* subject: 'Alice has sent a message to you!', | |
* text: 'text...', | |
* html: '<!DOCTYPE html>...' } | |
*/ | |
exports.sendEmail = (mailOptions) => { | |
console.log('mailOptions', mailOptions); | |
var transporter = nodemailer.createTransport(smtpConfig); | |
transporter.sendMail(mailOptions, function(error, info){ | |
if(error){ | |
return console.log(error); | |
} | |
console.log('Message sent: ' + info.response); | |
}); | |
} |
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exports.config = { | |
host: '', | |
port: 587, | |
secure: false, | |
requireTLS: true, | |
auth: { | |
user: 'user', | |
pass: 'pass' | |
} | |
}; |
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