This event handler sends an email using the Gomail module, in response of a trigger originated from the Aliyun MNS message service, where a message must be published by another program. It's written in Go for the Aliyun FC FaaS service. Use cases could be a notification service or a login confirmation.

It's intended to run from a custom Docker container sourced from Aliyun Container Service, so it implements a webserver on its own.

The message sent to Aliyun MNS must have this structure, in JSON:

{
   "From":"<from@email.address>",
   "To":"<to@email.address>",
   "Subject":"The subject of the message",
   "Body":"The body of the message"
}

The configuration, in the case of the code in this repository, is based in a YAML file, which is loaded into a variable map.

The structure of the relevant part of the YAML must be like this:

SMTP:
  HOST: smtp.yourserver.com
  PORT: 2525
  LOGIN: <your login>
  PASSWORD: <your password>

The load might look like this:

conf := config{} 
cfg := conf.load()

Where conf is an struct and cfg the map containing the loaded YAML.

Of course, feel free to change this part as you need.

• A sample Dockerfile in provided, which you might adjust to your use case.
• A sample Makefile to compile the Go code is provided, which you might adjust to your use case.
• The Makefile uses "handler" as the name of the compiled binary, so you must either use this name in your FC configuration, or make changes accordingly.
• Aliyun refers to Alibaba Cloud Services, but this code can be easily adapted to run in AWS Lambda, for instance.

Copyright (c) 2023, Rodolfo González González.

Read the LICENSE file.