class PennExtranetAdapter

Directly accessing the authenticated mechanize object

o = p.authenticated_agent

Public Class Methods

new(username, pw) click to toggle source

# File lib/penn_extranet_adapter.rb, line 15
def initialize(username, pw)
  @authenticated_agent = nil
  @username = username
  @pw = pw
end

Public Instance Methods

authenticate() click to toggle source

private returns the newly authenticated agent

# File lib/penn_extranet_adapter.rb, line 77
def authenticate
  puts "==AUTHENTICATING EXTRANET=="
  agent = new_secure_agent
  page = agent.get('https://extranet.uphs.upenn.edu') #connect to extranet
  agent.page.forms.first.username = @username # login username for extranet
  agent.page.forms.first.password = @pw # login pw
  agent.page.forms.first.submit # submits login request

  if agent.page.forms.first.checkbox_with(:name =>'postfixSID') #if another extranet session is open, it will ask you to close it or continue. If tow are open, you have to close one. This line looks for checkboxes and closes one session if they are present
    agent.page.forms.first.checkbox.check
  end
  btn = agent.page.forms.first.submit_button?('btnContinue') #finds the continue button
  agent.page.forms.first.submit(btn) # submits it to confirm login
  save_agent if Rails.env.development?
  return agent
end

authenticated_agent() click to toggle source

returns the already-authenticated agent OR creates a new one

# File lib/penn_extranet_adapter.rb, line 40
def authenticated_agent 
  #returns an agent that is authenticated or a new agent if you are on the VPN

  # step 1: try to load a saved agent to avoid having to re-auth
  if @authenticated_agent == nil and Rails.env.development? #
    load_agent
    
    # check to see if agent is valid, otherwise clear it
    @authenticated_agent = nil unless valid_agent?( @authenticated_agent )
  end
  
  # Step 2: if loading failed then will authenticate a new session
  @authenticated_agent ||= authenticate
end

get( url, param_hash={} ) click to toggle source

# File lib/penn_extranet_adapter.rb, line 65
def get( url, param_hash={} )
  begin     
    res = authenticated_agent.get(url, param_hash)
    res.body
  rescue
    raise "Failed to connect. Are you on VPN?"
    nil
  end
end

load_agent() click to toggle source

mainly for testing purposes, because in production it should not need to be called explicitly

# File lib/penn_extranet_adapter.rb, line 103
def load_agent
  @authenticated_agent = saved_agent
end

new_secure_agent() click to toggle source

# File lib/penn_extranet_adapter.rb, line 94
def new_secure_agent
  Mechanize.new{|a| a.ssl_version, a.verify_mode = 'SSLv3', OpenSSL::SSL::VERIFY_NONE}
end

post( url, param_hash={} ) click to toggle source

# File lib/penn_extranet_adapter.rb, line 55
def post( url, param_hash={} )
  begin     
    res = authenticated_agent.post(url, param_hash)
    res.body
  rescue
    raise "Failed to connect. Are you on VPN?"
    nil
  end
end

save_agent() click to toggle source

# File lib/penn_extranet_adapter.rb, line 98
def save_agent
  authenticated_agent.cookie_jar.save_as 'penn_extranet_cookie_jar', :session => true, :format => :yaml
end

saved_agent() click to toggle source

# File lib/penn_extranet_adapter.rb, line 107
def saved_agent
  if File.exists?("penn_extranet_cookie_jar")
    puts "==Loaded saved agent=="
    agent = new_secure_agent
    agent.cookie_jar.load('penn_extranet_cookie_jar') 
    agent 
  else
    puts "No saved agent that is valid"
    nil
  end
end

valid_agent?( agent = authenticated_agent ) click to toggle source

goes to the home extranet page and tries to detect if this is a valid session or not. After a prolonged time period, a valid session may become invalid

# File lib/penn_extranet_adapter.rb, line 24
def valid_agent?( agent = authenticated_agent )
  agent.get("https://extranet.uphs.upenn.edu")
  main_page_body = agent.page.body
  if main_page_body.include? "Please sign in to begin your secure session"
    puts "==CHECKING VALIDITY==...Invalid agent"
    false
  elsif main_page_body.include? "Welcome to the Secure Access SSL VPN"
    puts "==CHECKING VALIDITY==...Valid agent!"
    true
  else
    puts "==CHECKING VALIDITY==...Probably an invalid agent"
    false
  end
end