plumber (version 1.2.2)

pr_set_404: Set the handler that is called when the incoming request can't be served

Description

This function allows a custom error message to be returned when a request cannot be served by an existing endpoint or filter.

Usage

pr_set_404(pr, fun)

Value

The Plumber router with a modified 404 handler

Arguments

pr

A Plumber API. Note: The supplied Plumber API object will also be updated in place as well as returned by the function.

fun

A handler function

Examples

if (FALSE) {
handler_404 <- function(req, res) {
  res$status <- 404
  res$body <- "Oops"
}

pr() %>%
  pr_get("/hi", function() "Hello") %>%
  pr_set_404(handler_404) %>%
  pr_run()
}