Remote Calculator

A simple web service to implement a calculator built using Python/Django

How it works

The service offers an endpoint that reads a string input and parses it. it decodes the base64 encoding and interprets it by breaking it down into smaller statements and solved following the order of precedence. It returns either an HTTP error code, or a solution to the calculation in JSON form.

An example calculus query: Original query: 2 * (23/(33))- 23 * (23) With encoding: MiAqICgyMy8oMyozKSktIDIzICogKDIqMyk

API Description

Endpoint: GET /calculus?query=[input] The input is a UTF-8 with BASE64 encoding Return: On success: JSON response of format:

{ 
    "error": false, 
    "result": 546 
}

On error: JSON response of format:

{
    "error": true,
    "message": "string"
}

Supported operations: + - * / ( )

Deployment Process

• A github repository was created for the application locally and published online.
• Tests for the application are executed using Pytest. Configuration can be found in pytest.ini file in the root directory.
• Test coverage is monitored using Coverage and Coveralls. Configuration can be found in .coveragerc and .coveralls.yml respectively.
• The github repository uses Travis Pro for Continuous Integration. Configuration can be found in .travis.yml file in the root directory.
• Heroku is used for deployment and the application can be reached at https://remote-calc.herokuapp.com/. Configuration for the Heroku environment can be found in Procfile and runtime.txt files located in the root directory.
• The main branch of the remote github repository is automatically deployed when all tests pass and Travis checks are successful.