get all the tags of a tumblr blog

tumblr-tags

#!/usr/bin/env ruby

require "json"
require "set"
require "net/http"
require 'uri'

def fetch(uri_str, limit = 10)
  raise ArgumentError, 'HTTP redirect too deep' if limit == 0

  response = Net::HTTP.get_response(URI.parse(uri_str))
  case response
  when Net::HTTPSuccess     then response
  when Net::HTTPRedirection then fetch(response['location'], limit - 1)
  else
    response.error!
  end
end


blog_name="worldpaintings"

api_key=""

info_url="http://api.tumblr.com/v2/blog/#{blog_name}.tumblr.com/info?api_key=#{api_key}"

posts=JSON.parse(fetch(info_url).body)['response']['blog']['posts']

pages = posts / 20

tags = Set.new

url="http://api.tumblr.com/v2/blog/#{blog_name}.tumblr.com/posts?api_key=#{api_key}"

pages.times do |page|
  offset = page * 20
  json=fetch("#{url}&offset=#{offset}").body
  posts=JSON.parse(json)['response']['posts']
  posts.map { |post| post['tags'] }.flatten.each { |tag| tags << tag }
end

tags.each { |tag| puts tag }