Add retry functionality

Aeilert commented 2 years ago

Adds retry functionality

New function retry_request() to try and retry a GET request. Works on any URL. Only retries if the request failed due to a relevant server error (429, 500, 503, 504)
New function send_query() as a wrapper for build_url() and retry_request()
New function retry_host() to try and retry a host connection. Currently not used as part of the main API functions. We could use this as part of a diagnostic process if we want.
Note that send_query() uses ... for additional parameters passed to retry_request() . This option is however not exposed in get_stats() or get_aux()

shahronak47 commented 2 years ago

devtools::check() currently returns a NOTE

checking R code for possible problems ... NOTE
  File ‘pipr/R/zzz.R’:
    .onLoad calls:
      packageStartupMessage("Info: Session based caching is enabled.")

  See section ‘Good practice’ in '?.onAttach'.

Probably, we want to pull the changes from main to define .onAttach separately.

randrescastaneda commented 2 years ago

Task linked: CU-2me73h0 Add retry Functionality

worldbank / pipr

Add retry functionality #14