生成七牛云存储的授权使用的 Access Token

acces_token.rb

require 'hmac-sha1'
require 'uri'
require 'base64'

def urlsafe_base64_encode(content) 
  Base64.encode64(content).strip.gsub('+', '-').gsub('/','_').gsub(/\r?\n/, '')
end

def generate_access_token(access_key, secret_key, url, body)
  uri = URI.parse(url)
  signature = uri.path
  query_string = uri.query
  signature += '?' + query_string if !query_string.nil? && !query_string.empty?
  signature += "\n"
  
  if body
    signature += body
  end

  hmac = HMAC::SHA1.new(secret_key)
  hmac.update(signature)
  encoded_digest = urlsafe_base64_encode(hmac.digest)
  token = %Q(#{access_key}:#{encoded_digest})
end

ak = 'LxxjLRHQoeKzZTNEbKllYdUFX3GbpoqKIuuy8zPe' # 换成正确的
sk = 'Yxxm5CDIEO7x1ZYarEHQ97fZYi4M4q9T8InM_zt'  # 换成正确的
url = 'http://api.qiniu.com/stat/select/space?bucket=helishi&from=20140521&to=20140526&p=day'

token = 'QBox ' + generate_access_token(ak, sk, url, nil)

puts token