gistfile1.rb

#!/usr/bin/env ruby
require "net/http"
require "uri"
require "json"
require "base64"

class Imgur
  
  API_KEY = "15a6efd29935f62ea87579a8325d945a"
  
  def self.upload(file_name)
    url = URI::parse 'http://imgur.com/'
    img = Base64.encode64 File.read(file_name)
    
    req = Net::HTTP::Post.new('/api/upload.json')
    req.set_form_data :key => API_KEY , :image => img
     
    response,body = Net::HTTP::start(url.host,url.port) do |http|
      http.request(req)
    end
    
    puts JSON[body]['rsp']['image']['imgur_page']
  end
  
end

if ARGV.first == nil
  puts "Usage: #{$0} [filename]"
  exit 1
end
Imgur.upload ARGV.first