Instagram Media Tag Search

Gemfile

source "https://rubygems.org"

gem 'nokogiri'
gem 'sinatra'
gem 'headless'
gem 'watir'

main.rb

require 'nokogiri'
require 'open-uri'
require 'sinatra'
require 'json'

get '/tags/:tag/images' do
	doc = Nokogiri::HTML(open("https://www.instagram.com/explore/tags/#{params['tag']}/"))
	script = doc.css('script[type="text/javascript"]')[4].to_s
	json_data = script.gsub('<script type="text/javascript">window._sharedData = ', '').gsub(';</script>', '')
	
	raw = JSON.parse json_data
	nodes = raw["entry_data"]["TagPage"][0]["tag"]["media"]["nodes"]

	content_type :json
	nodes.to_json
end