Ebayr

Ebayr is a small gem which makes it a little easier to use the eBay Trading API with Ruby.

Installation

Add this line to your application's Gemfile:

gem 'ebayr'

And then execute:

$ bundle

Or install it yourself as:

$ gem install ebayr

Usage

To use the eBay Trading API, you'll need a developer keyset. Sign up at http://developer.ebay.com if you haven't already done so.

Next, you'll need to require Ebayr, and tell it to use your keys. You will also need to generate an RUName, and get the key for that. (This is all standard stuff - look at the eBay developer docs for details).

require 'ebayr'

Ebayr.dev_id = "my-dev-id"

# This is only needed if you want to retrieve user tokens
Ebayr.authorization_callback_url = "https://my-site/callback-url"

Ebayr.auth_token = "myverylongebayauthtoken"

Ebayr.app_id = "my-ebay-app-id"

Ebayr.cert_id = "my-ebay-cert-id"

Ebayr.ru_name = "my-ebay-ru-name"

# Set this to true for testing in the eBay Sandbox (but remember to use the
# appropriate keys!). It's true by default.
Ebayr.sandbox = false

Now you're ready to make calls

Ebayr.call(:GeteBayOfficialTime)
session = Ebayr.call(:GetSessionID, :RuName => Ebayr.ru_name)[:SessionID]

To use an authorized user's key, pass in an auth_token parameter

Ebayr.call(:GetOrders, :auth_token => "another-ebay-auth-token")

Use the input array to add to the body of the call

# Adds: "<a>1</a><a><b>1</b><b>2</b></a>" to the ebay request.
args = [{ :a => 1 }, { :a => [{:b => 1 }, { :b => 2 }] }]
Ebayr::Request.new(:Blah, :input => args)

Configuration

Ebayr will look for the following Ruby files, and load them once in order (if they exist) when the module is evaluated:

/etc/ebayr.conf
/usr/local/etc/ebayr.conf
~/.ebayr.conf
./.ebayr.conf

You can put configuration code in there (such as the variable setting shown above). The files should be plain old Ruby.

In a Ruby on Rails project, just create a file called config/initializers/ebayr.rb (or something), and put the configuration there. Of course, you should probably not check in these files, if you're using a public repository.

Testing

When running test, you generally won't want to use up your API call-limit too quickly, so it makes sense to stub out calls to the eBay API.

Ebayr test use Fakeweb to mimic the responses from eBay.

require 'ebayr'
require 'test/unit'
require 'fakeweb'

class MyTest < Test::Unit::TestCase
  def setup
    Ebayr.sandbox = true
  end

  # A very contrived example...
  def test_get_ebay_time
    xml = <<-XML
      <GeteBayOfficialTimeResponse>
        <Ack>Success</Ack>
        <Timestamp>blah</Timestamp>
      </GeteBayOfficialTimeResponse>
    XML

    FakeWeb.register_uri(:post, Ebayr.uri, :body => xml)

    time = SomeWrapperThatUsesEbayr.get_ebay_time
    assert_equal 'blah', time
  end
end

class SomeWrapperThatUsesEbayr
  def self.get_ebay_time
    hash = Ebayr.call(:GeteBayOfficialTime)
    hash.timestamp
  end
end

See './test/ebayr_test.rb' for more examples.

You need to remember to include Fakeweb in your Gemfile, or Ebayr will complain.

Contributing