https://docs.aws.amazon.com/AlexaWebInfoService/latest/index.html?ApiReference_TrafficHistoryAction.html

traffichistory.rb

#/usr/bin/ruby

require "cgi"
require "base64"
require "openssl"
require "digest/sha1"
require "uri"
require "net/https"
require "rexml/document"
require "time"

#
# Sample request to Alexa Web Information Service
#

if ARGV.length < 4
  $stderr.puts "Usage: urlinfo.rb ACCESS_KEY_ID SECRET_ACCESS_KEY site start_date"
  exit(-1)
else
  access_key_id = ARGV[0]
  secret_access_key = ARGV[1]
  site = ARGV[2]
  start_date = ARGV[3]
end
range = 7

SERVICE_HOST = "awis.amazonaws.com"

# escape str to RFC 3986
def escapeRFC3986(str)
  return URI.escape(str,/[^A-Za-z0-9\-_.~]/)
end

action = "TrafficHistory"
responseGroup = "History"
timestamp = ( Time::now ).utc.strftime("%Y-%m-%dT%H:%M:%S.000Z")

query = {
  "Action"           => action,
  "AWSAccessKeyId"   => access_key_id,
  "Timestamp"        => timestamp,
  "ResponseGroup"    => responseGroup,
  "Range"            => range,
  "SignatureVersion" => 2,
  "SignatureMethod"  => "HmacSHA1",
  "Start"            => start_date,
  "Url"              => site
}


query_str = query.sort.map{|k,v| k + "=" + escapeRFC3986(v.to_s())}.join('&')

sign_str = "GET\n" + SERVICE_HOST + "\n/\n" + query_str 

signature = Base64.encode64( OpenSSL::HMAC.digest( OpenSSL::Digest::Digest.new( "sha1" ), secret_access_key, sign_str)).strip
query_str += "&Signature=" + escapeRFC3986(signature)

url = URI.parse("http://" + SERVICE_HOST + "/?" + query_str)

xml  = REXML::Document.new( Net::HTTP.get(url) )

puts xml