ISBN API

A simple RESTful API built with Sinatra for validating ISBN-10 and ISBN-13 strings and retrieving the version of the isbn_field gem.

Setup

1. Clone the repository
2. Install dependencies:

   bundle install
   

3. Run the application:

   rackup -p 4567 config.ru
   

API Endpoints

1. Validate ISBN

Endpoint: POST /validate

Request Body:

{
  "isbn": "978-0-596-52068-7"
}

Response:

• For valid ISBN:

  {
    "valid": true,
    "message": "validation pass"
  }

• For invalid ISBN:

  {
    "valid": false,
    "message": "validation failed"
  }

• For incorrect format:

  {
    "valid": false,
    "message": "wrong format"
  }

• If ISBN is not provided:

  {
    "valid": false,
    "message": "ISBN is required"
  }

2. Get ISBN Field Gem Version

Endpoint: GET /version

Response:

{
  "version": "0.1.2"
}

Example Usage

Using curl:

# Validate ISBN-10
curl -X POST http://localhost:4567/validate \
  -H "Content-Type: application/json" \
  -d '{"isbn": "0321765723"}'

# Validate ISBN-13
curl -X POST http://localhost:4567/validate \
  -H "Content-Type: application/json" \
  -d '{"isbn": "978-0321765723"}'

# Get version
curl -X GET http://localhost:4567/version