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GoogleHttpActionmailer

An ActionMailer adapter to send email using Google's HTTPS Web API (instead of SMTP).

Installation

Add this line to your application's Gemfile:

gem 'google-http-actionmailer'

And then execute:

$ bundle

Or install it yourself as:

$ gem install google-http-actionmailer

Usage

Set up your authorization as described in the Google API Client (the easiest method is to pass a valid access token), edit config/application.rb or config/environments/$ENVIRONMENT.rb and add/change the following to the ActionMailer configuration:

config.action_mailer.delivery_method = :google_http_actionmailer

config.action_mailer.google_http_actionmailer_settings = {
  authorization: ...,
  client_options: {
    application_name: ...,
    application_version: ...,
  },
  request_options: {
    retries: ...,
    header: ...,
  },
  message_options: {
    fields: ...,
    content_type: ...,
  },
  delivery_options: {
    before_send: ...,
    after_send: ...,
  }
}

Options

option details
authorization This is the authorization, it could be a access token, etc as described in the Google API Client
client_options General client options as described in the Google API Client options code.
request_options General request options as described in the Google API Client options code.
message_options Specific options for that message such as fields, content_type, upload_source and quota_user.
delivery_options This currently contains hooks for before the message is sent and after the message is sent.

For client and request options, you can look here. And for message options, you can look at the send_user_message method here.

For dynamic setting of delivery method (this may be required given the access tokens usually expire):

mail.delivery_method(
  GoogleHttpActionmailer::DeliveryMethod, {
  authorization: ...
})

Normal ActionMailer usage will now transparently be sent using Google's HTTPS API.

To use the delivery options pass a proc that takes two parameters mail (the object created by ActionMailer) and message (the object created by the Gmail API).

GoogleHttpActionmailer::DeliveryMethod, {
  authorization: access_token,
  client_options: {
    application_name: ...,
    application_version: ...,
  },
  delivery_options: {
    after_send: ->(mail, message) {
      StorePostSendDetails.call(user: self, mail: mail, message: message)
    },
    before_send: ->(mail, message) {
      StorePreSendDetails.call(user: self, mail: mail, message: message)
    }
  }
}

If you want to set the threadId to your outgoing mail, just add the header 'Thread-ID' with the appropriate value.

mail to: email, subject: subject, "Thread-ID": thread_id

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/[USERNAME]/google_http_actionmailer. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

License

The gem is available as open source under the terms of the MIT License.

Code of Conduct

Everyone interacting in the GoogleHttpActionmailer project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.

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Google HTTP API support for Actionmailer

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