use tinypng api to compress png file in a directory

compress_png_r

require "net/https"
require "uri"

uri = URI.parse("https://api.tinypng.com/shrink")

http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = true

dir = Dir.pwd

index = 0
num = 0
keys = [
  "-KmDIUKv8JKK1Iw76hYH4jdw4_HD-9Vw",
  "J4G6ciq5ARp-bYprzVMc-U9EPwppFRYL",
  "w37EvdOnWwZGeVSyiJHbfny0_QACxUVO"
]
limit = 498

def traverse_dir(file_path)  
  if File.directory? file_path  
    Dir.foreach(file_path) do |file|  
      if file!="." and file!=".."  
        traverse_dir(file_path+"/"+file){|x| yield x}  
      end  
    end  
  else  
    yield  file_path  
  end  
end  

traverse_dir(dir){|f|  
  if f.to_s() =~ /\.png$/  
  	input = f.to_s()
		output = f.to_s()

    request = Net::HTTP::Post.new(uri.request_uri)
    request.basic_auth("api", keys[index])

    response = http.request(request, File.read(input))
    if response.code == "201"
      File.write(output, http.get(response["location"]).body)
      puts "num = " + "#{num}" + " key = " + keys[index] + " 压缩成功 " + "#{output}"
    else
      puts "num = " + "#{num}" + " key = " + keys[index] + " 压缩失败 " + "#{output}"
    end

    num = num + 1
    if num >= limit
      num = 0
      index = index + 1
    end
  end  
}  

:v