Restful Relay is a PHP Based Microservice that relays remote SFTP, SSH, SMTP commands through a RESTful interface. Microservice also can create JWT tokens as well as conduct request fanning. This utility works great in combination with API Gateway solution such as Kong (konghq.com), in a Kubernetes cluster, or a service mesh.

Documentation:

• Installation and Deployment
• SSH
• SFTP
• SMTP
• JWT Creation
• Request Fanning
• Other protocols and utlities coming soon

See usage examples for Kubernetes, Kong for Kubernetes Ingress Controller, and docker-compose in the examples directory folder.

Docker image is Alpine 3.11 based running PHP 7.3 on Apache. The containter exposes both ports 80 an 443 with a self signed certificated. If you wish to alter the container configuration, feel free to use the Dockerfile in this repo (https://github.com/yesinteractive/restful_relay/blob/master/Dockerfile). Otherwise, you can pull the latest image from DockerHub with the following command:

docker pull yesinteractive/restfulrelay

Typical basic usage:

docker run -it yesinteractive/restfulrelay

Typical usage in Dockerfile:

FROM yesinteractive/restfulrelay
RUN echo <your commands here>

Runs SSH command on remote server. Only currently supports username password authentication.

URL : /ssh

Method : POST

Parameters

Auth required : NO

HTTPie Request : http -f POST /ssh server=localhost user=myuser pass=mypass command='php -v'

Respones Code : 200 OK

{
  "Response": {
    "Status": "Success",
    "Response": "PHP 5.6.36 (cli) (built: May 18 2018 04:51:01) \nCopyright (c) 1997-2016 The PHP Group\nZend Engine v2.6.0, Copyright (c) 1998-2016 Zend Technologies\n    with Zend OPcache v7.0.6-dev, Copyright (c) 1999-2016, by Zend Technologies\n",
    "Processing Time": "0.202658"
  }
}

Runs SSH command on remote server. Only currently supports username password authentication.

URL : /sftp/get

Method : POST

Parameters

Auth required : NO

HTTPie Request : http -f POST /sftp/get server=localhost user=myuser pass=mypass filename='example.txt'

Respones Code : 200 OK

{
  "Response": {
    "Status": "Success",
    "Response": "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.",
    "Processing Time": "0.173307"
  }
}

Will return true if put sucessful, false if failed.

URL : /sftp/put

Method : POST

Parameters

Auth required : NO

HTTPie Request : http -f POST /sftp/put server=localhost user=myuser pass=mypass data='sample text' filename='example.txt'

Respones Code : 200 OK

{
  "Response": {
    "Status": "Success",
    "Response": true,
    "Processing Time": "0.177481"
  }
}

Sends mail via smtp. Only currently supports username password authentication.

URL : /mailer

Method : POST

Parameters

Auth required : NO

HTTPie Request : http -f POST /mailer server=localhost user=myuser pass=mypass port=587 from=sender@fqdn from_name=bob to=recipient@fqdn subject=hello body=world

Respones Code : 200 OK

{
  "Response": {
    "Status": "Message send successfully.",
    "Processing Time": "1.202658"
  }
}

Generate a JWT token. Claims returned in token will consist of id and iat.

URL : /jwt

Method : POST

Parameters

Auth required : NO

HTTPie Request : http -f POST /jwt key=mykey id=myuser

Respones Code : 200 OK

{
  "Response": {
    "Status": "Success",
    "JWT": "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpZCI6Im15dXNlciIsImlhdCI6MTU4MDAwMDU4MH0.aQluZvipTnaglibRBNa5Z-GUi_pp0meVIjhSzn4gPt8",
    "ID": "myuser",
    "Processing Time": "0.001395"
  }
}

Fans a single request into multiple requests and then conslidate responses to one JSON Response. Please note that this function assumes that the upstream responses from each URL specified will be JSON based. URL Requests are run concurrently for better speed rather than in a serial fashion which would cause greater latency.

URL : /fan

Method : POST

Request Data Content Type Must Be application/json

See example below. To perform an HTTP Get, simply list the URL. If you would like to perform a post, pass the post data in a group named 'post'. Example below is showing 3 requests - 2 GETs and 1 POST.

[
  {
    "url": "http://dummy.restapiexample.com/api/v1/employees"
  },
  {
    "url": "http://dummy.restapiexample.com/api/v1/employees"
  },
  {
    "url": "http://dummy.restapiexample.com/api/v1/create",
    "post": {
      "appid": "YahooDemo",
      "output": "php",
      "context": "test"
    }
  }
]

Auth required : NO

HTTPie Request : http -f POST /fan <json pay load goes here>

Respones Code : 200 OK

[
  {
    "status": "success",
    "data": [
      {
        "id": "24",
        "employee_name": "Doris Wilder",
        "employee_salary": "85600",
        "employee_age": "23",
        "profile_image": ""
      }
    ]
  },
  {
    "status": "success",
    "data": {
      "name": null,
      "salary": null,
      "age": null,
      "id": 84
    }
  }
]

• None.