html5 console connection to a vcenter guest

html5url.rb

require 'rbvmomi'
require 'pry-byebug'
require 'socket'
require 'openssl'
require 'digest/sha1'
require 'io/console'

def get_thumbprint(vc)
  ssl_context = OpenSSL::SSL::SSLContext.new
  tcp_client = TCPSocket.new vc, 443
  ssl_client = OpenSSL::SSL::SSLSocket.new tcp_client, ssl_context
  ssl_client.connect
  certificate = ssl_client.peer_cert
  thumbprint = Digest::SHA1.hexdigest(certificate.to_der).upcase.scan(/../).join(':')
  thumbprint
end

def build_url(username, password, vc, vm_name, thumbprint)
  vim = RbVmomi::VIM.connect host: vc, user: username, password: password, :insecure => true
  propertypaths = %w( name summary.vm)
  vim.rootFolder.childEntity.grep(RbVmomi::VIM::Datacenter).each do |dc|
    vm_inventory = dc.vmFolder.inventory_flat({ VirtualMachine: propertypaths})
    vm_inventory.select!{ |x| x.class.to_s == 'VirtualMachine'}
    inventory = vm_inventory.to_h
    inventory.each { |k, v| inventory[k] = v.to_hash }
    @vmId = inventory.find{ |x| x[1]['name'] == vm_name }[1]['summary.vm'].to_s.split('"')[1]
    break if !@vmId.nil?
  end
  ticket = vim.serviceContent.sessionManager.AcquireCloneTicket
  url = "https://#{vc}:7343/console/?vmId=#{@vmId}&vmName=#{vm_name}&host=#{vc}:443&sessionTicket=#{ticket}&thumbprint=#{thumbprint}"
  url
end

def connect(url)
  if RbConfig::CONFIG['host_os'] =~ /mswin|mingw|cygwin/
    system "start #{url}"
  elsif RbConfig::CONFIG['host_os'] =~ /darwin/
    system "open \"#{url}\""
  elsif RbConfig::CONFIG['host_os'] =~ /linux|bsd/
    system "xdg-open #{url}"
  end
end

print "Username: "
username = gets.chomp
print "Password: "
password = STDIN.noecho(&:gets).chomp
puts ""
print "vcenter: "
vc = gets.chomp
print "vm name: "
vm_name = gets.chomp

thumbprint = get_thumbprint(vc)
url = build_url(username, password, vc, vm_name, thumbprint)
connect(url)
puts "Connection initiated. URL was #{url}"