pr_set_404 function

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

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

pr_set_404(pr, fun)

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

Returns

The Plumber router with a modified 404 handler

Examples

## Not run:

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

pr() %>%
  pr_get("/hi", function() "Hello") %>%
  pr_set_404(handler_404) %>%
  pr_run()
## End(Not run)