I am moving into yet another area that I possess absolutely no experience with. In this case the realm of RSS feeds and Rails as the consumer. My first feature/scenario looks like this and, given the effort I had to make to grasp the basics of features and scenarios in the crud world, I thought it best to ask for comments before I get too far in. Feature: Automatically Retrieve and Store Foreign Currency Exchange Rates In order to set foreign currency exchange rates daily The automated system Should automatically retrieve and store central bank exchange rates To Reduce Costs and Protect Revenue Scenario: Retrieve Exchange Rates from the Bank of Canada RSS feed Given an RSS feed "http://www.bankofcanada.ca/rss/fx/noon/fx-noon-all.xml" When I access the RSS feed between Monday to Friday after "17:15UTC" Then I should see "Bank of Canada: Noon Foreign Exchange Rates" And I should see today's date in "yyyy-mm-dd" format Basically, all this is doing is seeing if I can get the feed. I suppose that I could implement this as a direct controller call to the URL but there is probably a better way of which I am presently unaware. The other thing for which I wish guidance is the proper method to parse the feed. I gather this is a case where I should be parsing the xml in order to feed it to (ActiveResource?) and thence into the currency_exchange_rates model. Is there a recommended/preferred gem to handle this requirement?
on 2009-04-13 23:03
on 2009-04-15 18:17
Q. Is there anything special about the Rails test environment that would inhibit an ActivieResource object from connecting to an outside URL? I am presently working inside the console with this expression: >> forex = ForexCASource.find and receiving a 404 error. The resource is defined as: class ForexCASource < ActiveResource::Base self.site = 'http://www.bankofcanada.ca/rss/fx/noon/fx-noon-all.xml' end I can reach the site url from a Firefox instance running on the same host using cut and paste so the url in the site assignment is valid.