httrplus

Addon to the httr package.

The intention is for this package to be short-lived, and to serve as a converstation-starter to a pull-request to httr.

The purpose is to propose a framework around httr::stop_for_status() and httr::warn_for_status(). The aim is for you to be able to more-easily customise messsages and error/warning-signalling behaviour when using httr.

The central function in this package is check_for_status(). Its arguements are:

• resp - a httr::response object
• type - one of c("error", "warning", "message")
• message_function - a function that takes resp as its first arguement, returns message
• ... - additional arguements to message_function

The default message_function is message_standard() (provided here), a function that replicates the messages returned by httr::stop_for_status() and httr::warn_for_status()

Hence, the existing httr functions could be rewritten:

stop_for_status <- function(x){
  check_for_status(x, type = "error")
}

warn_for_status <- function(x){
  check_for_status(x, type = "warning")
}

Another message function is offered: message_verbose().

Installation

This package is not yet on CRAN (and hopefully won't be).

To get the current development version from github:

# install.packages("devtools")
devtools::install_github("ijlyttle/httrplus")