Xero Web API; implemented API Rate limit retry

Xero has a limit of 60 calls per minute and 5,000 per day (using a rolling time period) when using its API. A HTTP status of 503 is returned.

Therefore, finPOWER Connect now includes the following strategy:

• If the request fails with a Status 503, finPOWER Connect will wait for a short period and then try sending the request again. This happens 5 times with an increasing wait period of 2, 4, 8, 16 and 32 seconds (a total potential wait of 62 seconds).

NOTE: This should all but eliminate the per minute limit - but not the per day limit.