Question

I am using a third-party API (Spreadshirt’s API) and in order to perform a basket creation, I need to send an xml through a POST request. I am trying to do this with the available Net::HTTP functions and this is how I am doing it

def get_session
      @time = Time.now.to_i * 1000 #get the current time as integer
      @sha1 = Digest::SHA1.hexdigest("POST http://api.spreadshirt.com/api/v1/baskets #{@time} #{ENV['SPREADSHIRT_SECRET_KEY']}") #encrypt the signature

      @http = Net::HTTP.new("http://api.spreadshirt.com")
      @path = "/api/v1/baskets?apiKey=#{ENV['SPREADSHIRT_API_KEY']}&sig=#{@sha1}&time=#{@time}"

      @payload = "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>
      <basket xmlns:xlink=\"http://www.w3.org/1999/xlink\" xmlns=\"http://api.spreadshirt.net\">
      </basket>"

      @response = @http.request_post(@path, @payload)
  end

time => “The timestamp as milliseconds used in signature, e.g. 1240575575156.”

sig =>”The signature as SHA-1 as Hex of string ‘METHOD URL_WITHOUT_QUERY TIMESTAMP SECRET’, e.g. ‘POST http://localhost:8080/api/v1/users/42/productPriceCalculator 1240575575156 987654321′.(use your own secret on live system).”

apiKey => “The requested API key, e.g. 123456789 (use your own key on live system).”

More about the spec can be found on these links:
http://api.spreadshirt.net/api/v1/metaData/api.html#N218D1
http://wiki.developer.spreadshirt.net/display/API/Basket+Resources

I am just wondering whether I have used the Net::HTTP function correctly or not assuming that I have used the correct secret key and api key.

EDIT:

The vendor has provided a sample code in PHP which can be found here
http://spreadshirtapps.svn.sourceforge.net/viewvc/spreadshirtapps/php/sod/
the file sprd/CheckoutController.php is the one that is analogous to what I want to do.

Answer 1

Many web services require you to tell them you’re sending XML via the Content-Type header. For Net::HTTP try something like this:

url = "http://.../api/v1/baskets?..."
payload = "..."

require 'net/http'
request = Net::HTTP::Post.new(url)
request.add_field "Content-Type", "application/xml"
request.body = payload

uri = URI.parse(url)
http = Net::HTTP.new(uri.host, uri.port)
response = http.request(request)