giphy_dl.rb

#!/usr/local/bin/ruby -w
# There doesn't seem to be an easy way to download a gif from giphy.com from the url type
# that people tend to use when posting in forums
# Usage:
# ruby giphy_dl.py <giphy url>


require 'giphy'
require 'open-uri'


def get_filename(url)
  url_part = get_url_part(url)
  File.basename(url_part) + ".gif"
end

def get_title(gif)
  gif.instance_variable_get("@hash")["title"]
end

def get_image_url(gif)
  gif.instance_variable_get("@hash")["images"]["downsized_large"]["url"]
end

def download_file(url, filename)
  begin
    puts "Downloading #{url}"
    open(filename, "wb") do |file|
      file << open(url).read
    end
    puts "Saved to #{filename}"
  rescue Exception
    puts "Failed to download #{url} as #{filename}"
  end
end

def download_gif(url)

  gif_id = url.sub("https://giphy.com/gifs/", "")
  if gif_id.include? '-'
    gif_id = (url.split("-"))[-1]
  end

  gif = Giphy.gif_by_id(gif_id)
  title = get_title(gif)
  image_url = get_image_url(gif)

  download_file(image_url, "#{title}.gif")
end

if ARGV[0].nil?
  puts "No url given"
else
  download_gif(ARGV[0])
end