A ruby script to convert an HTTP blueprint JSON file into multiple HAR files and then convert those HAR files in to code snippets using httpsnippet

apib2httpsnippets

#!/usr/bin/env ruby
# ./apib2httpsnippets
# Author: Max Novakovic
# Email:  max@lateral.io

require 'awesome_print'
require 'json'
require 'fileutils'
require 'uri'

json = JSON.parse(File.read(ARGV[0]))
dir = File.expand_path(File.dirname(ARGV[0]))
api_name = File.basename(ARGV[0], ".json")

# Create directories for hars and snippets if doesn't exist
FileUtils.mkdir_p("hars")
FileUtils.mkdir_p("snippets")

# Simple slug function
def slug(str)
  str.downcase.strip.gsub(' ', '-').gsub(/[^\w-]/, '')
end

# Get the first param value from the possible values
def first_param_val(param)
  first = param['values'][0]
  return '' unless first
  first['value']
  first['value'].to_i if param['type'] == 'integer'
end

# Get the API meta HOST
host = json['metadata'].find { |item| item['name'] == 'HOST' }['value']

# Step through each resourceGroup, resource and method
json['resourceGroups'].each do |rg|
  ap rg['name']
  rg['resources'].each do |r|
    ap "-- #{r['name']}"
    r['actions'].each do |action|
      ap "---- #{action['name']}"

      # Create the har object
      har = {}
      har['method'] = action['method']
      har['url'] = host + r['uriTemplate']

      # Need the Subscription-Key header for every request
      har['headers'] = [{ name: 'Subscription-Key', value: 'YOUR_API_KEY' }]

      # GET requests
      if har['method'] == 'GET'

        # Get the params and add them
        action['parameters'].map do |param|
          { 'name' => param['name'], 'value' => first_param_val(param) }
        end
      end

      # POST or PUT requests
      if (har['method'] == 'POST' || har['method'] == 'PUT') && action['parameters'].count > 0

        har['postData'] = {
          'mimeType' => 'application/json',

          # Create a JSON object from all the params
          'text' => action['parameters'].each_with_object({}) do |param, hash|
            hash[param['name']] = first_param_val(param)
          end.to_json
        }

        # Use this if your API does not support application/json content type:
        # har['postData'] = {
        #   'text' => action['parameters'].map do |param|
        #     "#{param['name']}=#{first_param_val(param)}"
        #   end.join('&')
        # }
      end

      # Write the HAR to file
      name = "#{slug(rg['name'])}-#{slug(r['name'])}-#{slug(har['method'])}"
      File.open("hars/#{name}.json", "w") do |f|
        f.truncate(0)
        f.write(har.to_json)
      end
    end
  end
end

# There are more available! Modify as you see fit - http://git.io/vLwrr
targets = {
  'shell'      => ['curl'],
  'go'         => ['native'],
  'httpie'     => ['native'],
  'java'       => ['okhttp'],
  'javascript' => ['jquery'],
  'node'       => ['request'],
  'objc'       => ['native'],
  'ocaml'      => ['native'],
  'php'        => ['native'],
  'python'     => ['native'],
  'ruby'       => ['native']
}

# Loop through each target and generate the snippets
targets.each do |lang, value|
  value.each do |client|
    print "Outputting #{lang} #{client}: "
    ap `httpsnippet hars/*.json -t #{lang} -c #{client} -o snippets/#{lang}`
  end
end