Set a request preprocessor




A function or expression that modifies request objects. Specifically, a valid input is one of:

  • A function taking a single argument, the request, and returning a valid request object.

  • A formula as shorthand for an anonymous function with . as the "request" argument, as in the purrr package.

  • A list of functions/formulas, which will be executed in sequence on the request.

  • NULL, to override the default redact_auth().


Invisibly, FUN, validated and perhaps modified.

See also