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mkdir certs
cd certs

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openssl genrsa -out app_key.pem 1024
openssl req -new -key app_key.pem -x509 -days 365 -out app_cert.pem

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<% payment_service_for @order_id, @seller_account_email,
    :amount => @total_price,
    :currency => @currency,
    :service => 'paypal',
    :html => { :id => 'my-form' } do |service| %>

    <% service.customer :first_name => @customer.first_name,
                                    :last_name => @customer.last_name,
                                    :phone => @customer.phone,
                                    :email => @customer.email %>

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APP_CERT_PEM = File.read("#{Rails.root}/certs/app_cert.pem")
APP_KEY_PEM = File.read("#{Rails.root}/certs/app_key.pem")

def encrypt_for_paypal(values)
   signed = OpenSSL::PKCS7::sign(OpenSSL::X509::Certificate.new(APP_CERT_PEM),         
   OpenSSL::PKey::RSA.new(APP_KEY_PEM, ''), values.map { |k, v| "#{k}=#{v}" }.join("\n"), [], OpenSSL::PKCS7::BINARY)
   OpenSSL::PKCS7::encrypt([OpenSSL::X509::Certificate.new(PAYPAL_CERT_PEM)], signed.to_der, OpenSSL::Cipher::Cipher::new("DES3"), OpenSSL::PKCS7::BINARY).to_s.gsub("\n", "")
end

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#Encrypt the transaction information
cert_id =YAML.load(File.open("#{RAILS_ROOT}/config/paypal.yml"))[ENV["RAILS_ENV"]]['paypal']['cert_id']
paypal_params = {:cert_id=>cert_id}
service.form_fields.collect do |field, value|
  paypal_params.merge!({field=>value})
end
result << hidden_field_tag(:cmd, "_s-xclick")
result << "\n"
result << hidden_field_tag(:encrypted, encrypt_for_paypal(paypal_params))
#  result << service.form_fields.collect do |field, value|

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development:
  paypal:
    login: 
    password: 
    signature: 
    cert_id : 
  paypal_standard:
    email:  
    password:

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development:
  adapter: mysql2
  host: 192.168.00.01
  database: project
  username: project
  password: xxxxxx
#  socket: /var/mysql/mysql.sock
  pool: 5
  timeout: 5000

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xml = File.read('timeline.xml')
puts Benchmark.measure {
  doc, statuses = REXML::Document.new(xml), []
  doc.elements.each('statuses/status') do |s|
    h = {:user => {}}
    %w[created_at id text source truncated in_reply_to_status_id in_reply_to_user_id favorited].each do |a|
      h[a.intern] = s.elements[a].text
    end
    %w[id name screen_name location description profile_image_url url protected followers_count].each do |a|
      h[:user][a.intern] = s.elements['user'].elements[a].text

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XML:

<watchlist>
  <id type="integer">287</id>
  <last-updated type="datetime">2007-10-22T13:05:27-04:00</last-updated>
  <name>macromedia</name>
</watchlist>
<watchlist>
  <id type="integer">288</id>
  <last-updated type="datetime">2007-10-22T13:05:29-04:00</last-updated>

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DB_CONFIG = YAML.load_file(“#{RAILS_ROOT}/config/database.yml”)[RAILS_ENV]
p DB_CONFIG['host'] # 192.168.0.1
p DB_CONFIG['username'] # project
p DB_CONFIG['password'] # xxxxxx