example_post.rb

require 'net/http'
require 'uri'

# Create te http object
url = "http://POST_URL_HERE/api/create_custom_order"
uri = URI.parse(url)
http = Net::HTTP.new(uri.host, uri.port)

xml = <<-EOF
<order>
  <company-id>1</company-id>
  <shipping-profile>t1</shipping-profile>
  <shipping-full-name>John Doe</shipping-full-name>
  <shipping-care-of/>
  <shipping-address-1>123 Easy St</shipping-address-1>
  <shipping-address-2/>
  <shipping-city>Eau Claire</shipping-city>
  <shipping-state>WI</shipping-state>
  <shipping-zip>77593</shipping-zip>
  <shipping-country>US</shipping-country>
  <items>
    <item>
      <inventory-item-id>1</inventory-item-id>
      <quantity>1</quantity>
    </item>
  </items>
</order>
EOF

# Set Headers
headers = {
  'Referer' => 'http://www.my_url_here.com',
  'Content-Type' => 'text/xml',
  'Host' => uri.host,
  'Content-Length' => xml.length.to_s
}

# Post the request
resp, data = http.post(uri.path, xml, headers)

# Output the results
puts 'Code = ' + resp.code
puts 'Message = ' + resp.message
resp.each { |key, val| puts key + ' = ' + val }
puts data