   _execute: (cb) ->
     # Validate
     if !@url
-      err = new Error "You did not specify a url to retrieve"
+      err = new Error "You did not specify a url to fetch"
       return cb err
 
     if @url.indexOf("file://") == 0

      if @expectedStatus not instanceof Array
        @expectedStatus = [ @expectedStatus ]
      @expectedStatus = @expectedStatus
        .join("|")
        .replace /x/g, "\\d"
      @expectedStatus = new RegExp "^#{@expectedStatus}$"

  retrieve: (mainCb) ->
    operation = retry.operation
      retries   : @retries
      factor    : @factor

      airbud = new Airbud options

    try
      airbud.fetch cb
    catch err
      err.message = "Got an error while retrieving #{airbud.url}. #{err}"
      cb err
