Email Notification Api

Fast set-up and highly customizable based on NodeJs Supports custom handlebars templates and many more features

Image: https://hub.docker.com/r/kesim0/xcourier

Usage Example

Configuration

configuration.yml

email:
  #smtp_url: ''
  host: smtp.example.com
  port: 2528
  ignore_tls: false
  secure: false
  require_tls: true
  user: ***
  password: ***
  default_from: test@from.com
  default_name: 'Example from'
endpoints:
  - id: 'example-id'
    receivers: [alex.sampler@testmail.com, ann@company.example]
    payload_type: only_json
    message: 'New Notification from SystemX' # default 'new notificaton from id'
    linked_url: https://example.com
    linked_url_tag: example-action
    subject: 'Alert from SystemX'

Request

note: GET,POST,PUT methods are allowed for more information see Request-Types

curl --location --request POST 'http://localhost:3001/example-id' \
--header 'Authorization: Basic ********' \
--header 'Content-Type: application/json' \
--data-raw '{
"user": "systemRoot",
"id": 733599,
"Action": "get_overview",
"time": 1650949483,
"error_message": "TypeError: Cannot read properties of undefined",
"stacktrace": [
"at Object. (/home/cg/root/2523129/main.js:20:11)"
],
"hash": "00000000000000000007fc4fdf669fed9c64c210f48b2911c8c206e25bbf413b"
}'

Output

Docker Set-Up

docker run note: the local /config directory should contain a configuration.yml file.

docker run -it --rm -v $(PWD)/config:/usr/src/app/xcourier/config \
  -p 3001:3001 \
  -e URL_PREFIX="/api" \
  -e PORT=3001 \
  -e DEBUG=false -e BASIC_AUTH_USERNAME="root" \
  -e BASIC_AUTH_PASSWORD="root" \
  -e TZ="Europe/Berlin" \
  --name xcourier-demo \
  kesim0/xcourier:latest

docker-compose

version: '3.3'
services:
    xcourier:
        container_name: xcourier-demo
        image: 'kesim0/xcourier:latest'
        volumes:
            - '$(PWD)/config:/usr/src/app/xcourier/config'
        ports:
            - '3001:3001'
        environment:
            - URL_PREFIX=/api
            - PORT=3001
            - DEBUG=false
            - BASIC_AUTH_USERNAME=root
            - BASIC_AUTH_PASSWORD=root
            - TZ=Europe/Berlin

Configuration

Global configuration environment variables

Property	type	example
debug	boolean	true
port	number	3000 (default)
url_prefix	string	/sub (default: '/')
basic_auth_username	string
basic_auth_password	string
api_key	string	in progress

smtp configuration properties (email)

Property	type	example
smtp_url	string	smtps://user@domain.com:pass@smtp.domain.com
host	string	smtp.domain.com
port	number	1025
ignore_tls	boolean	false
secure	boolean	false
require_tls	boolean	true
user	string	sampleuser1
password	string	samplepass123
default_from	string (email)	test@domain.com
default_name	string	example

endpoint configuration properties

Property	type	description	example
id	string	sub-url for endpoint [REQUIRED]	'alert-all' -> domain.com/notify-all
payload_type	string	specify the payload source to use / prefer [DEFAULT: prefere_json]	'prefer_query', prefer_json', 'only_query', 'only_json', 'only_message'
receivers	Array of strings	specify receivers by email for specific endpoint [REQUIRED]	[user1@domain1.com, user2@domain2.com]
subject	string	subject of mail
template_path	string	path for custom handlebars template [OPTIONAL -> else use default template]	'custom_template1.hbs', 'sub/custom_template2.hbs'
message	string	static message for default template [OPTIONAL]
linked_url	string(URL)	static url for call-to action button in default template [OPTIONAL]
linked_url_tag	string	tag for call-to action button in default template [OPTIONAL]
template_defaults	object (any)	default value definitions for payload (use in case of missing properties)

example yaml configurations

email:
  #smtp_url: ''
  host: smtp.domain.com
  port: 1234
  ignore_tls: false
  secure: false
  require_tls: true
  user: username1
  password: password123
  default_from: test@from.com
  default_name: 'Example from'
endpoints:
  - id: 'minimal'
    receivers: [test@mail1.de, test2@mail2.de]
    subject: 'Alert from minimal'
  - id: 'prefere-json1' #first defined id would be used in case of duplicate ids
    receivers: [test456@mail1.de, test2@mail2.de] # without "'"
    #default: prefere_json
    #possible values: 'prefer_query',prefer_json','only_query','only_json','only_message'
    payload_type:
      prefer_json
      # default 'new notificaton from {id}'
    message: 'New message from json example'
    linked_url: https://example.com #optional
    linked_url_tag: example-action #optional
    subject: 'Json Example send'
  - id: 'json-only1'
    receivers: [alex.sampler@testmail.com, ann@company.example]
    payload_type: only_json
    message: 'testmessage -> json only' # default 'new notificaton from id'
    linked_url: https://github.com
    linked_url_tag: git
    subject: 'Alert from 1 sub'
  - id: 'template-defaults1'
    receivers: [alex.sampler@testmail.com, ann@company.example]
    message: 'testmessage'
    subject: 'Message from defaults'
    # Default values overridden by payload
    template_defaults:
      user: 'unknown'
      property: 123123
      arrayprop:
        - id: '1'
        - id: '2'
  - id: 'custom1'
    receivers: [alex.sampler@testmail.com, ann@company.example]
    # sub-paths are allowed -> 'sub/custom_message.hbs'
    template_path: 'custom_message.hbs'
    message: 'custom template usage one'
    subject: 'Alert from custom template'

Request-types

• Possible Types: GET, POST, PUT
• Possible Payload-Types: Json, Query parameters
• additional URL Prefix can be defined as environment variable: URL_PREFIX
• additional Basic-Auth can be defined as environment variable: BASIC_AUTH_USERNAME and BASIC_AUTH_PASSWORD (default: admin:admin)
• additional API-Key can be defined as environment variable: API_KEY (in progress)

Payload Type

• prefer_query: merges json and query parameters but overwrite json props with query properties if key is equal
• prefer_json: merges json and query parameters but overwrite query props with json properties if key is equal
• only_query: only query parameters will be used
• only_json: only json payload is used (no query parameters)
• only_message: ignores payload and uses message instead

Query-Parameters

curl --location --request POST 'http://localhost:3000/{id}?param1=1&param2=value' \
--header 'Authorization: Basic ****'

Custom Templates

It is possible to use custom handlebars templates. In this case some values are reserved for the template:

• internal.id: id of the message
• internal.message: message title
• internal.raw_data: raw data of the message
• internal.timestamp: timestamp of the message (send time)
• internal.subject: subject of the message

The *.hbs files must be located in the ./templates/mail-templates folder. or in case of docker usage in the /templates directory. It is possible to use sub-paths for the templates.

For more Information about how to use handlebars templates please see the Handlebars documentation.

Server Information

• get at /report entry point curl --location --request GET 'http://localhost:3000/report'

Roadmap

• only env set-up (w/o *.yaml)
• global properties
• token authentication
• Multi-user configuration
• sub-ids as entrypoint
• Parse XML data
• Enable/disable visualizations in default template
• Select Properties or sub property for grid in default template
• Fonts for default template
• queue incoming requests