mailsender

Very simple Go app to send notification email. Usually invoked by scripts. A set of standard emails can be built using the JSON formatted configuration file. So several notifications emails can be pre-defined and used accordingly.

Each email will have a JSON file and can be stored anywhere. If a param with the path/filename is not passed, the default app path/files folder will be used to search the named JSON file.

Most of the config variables may be set via app param. Attention: calling params will overide JSON file configs.

Default config file is ./mailsender.json

The message can be passed into the bodytemplate is this has a %s or %d.

Configuration file format

Format file: JSON structured:

	{
		"app_name": "Alpha",
		"app_name": "monit",
		"secure": true,
		"smtp_host": "mailtrap.io",
		"smtp_port": 2525,
		"smtp_email": "sender@example.com",
		"smtp_username": "smtpusername123",
		"smtp_password": "123456",
		"email_address": "me@example.com", 
		"subject": "lift-off notification", 
		"body": "%s ready for lift-off",
		"message": "Eagle 3",
		"log": true, 
		"log_file": "mailsender_1.log",
	}

Usage

$ mailsender -p /path/to/file -f filename.json

Configuration fields

• configs: (string) path to the JSON configs file
• server_name: (string) server name that triggers the notification
• app_name: (string) app name that triggers the notification
• secure: (bool) http vs https.
• smtp_host: (string) the hostname of the email provider
• smtp_port: (int) the port of the smtp host
• smtp_email: (string) the email of the sender (from header)
• smtp_username: (string) the username for the smtp auth
• smtp_password: (string) the password for the smtp auth
• email_address: (string) email to receive the alerts.
• subject: (string) a default subject for the email
• body: (string) a default body message, accepting [%s|%d|...] params
• message: (string) message passed into the app (composing the body)
• log: (bool) log ?
• log_file: (string) # file to append the log.

Tests

For testing purposes, one can define a fake smtp.SendMail function.

Cross Compile

If you are building on OSX for Linux usage, make sure your Go e prepared to generate binaries for other architectures. To enable it for Linux:

$ cd  $GOROOT/src
$ GOOS=linux GOARCH=386 ./make.bash

Then to generate a linux specific binary:

$ GOOS=linux GOARCH=386 CGO_ENABLED=0 go build -o mailsender.linux mailsender.go