Hi Marco,

The current RESTXQ 1.0 specification seems to mandate that comma separated lists needs to be extracted to single items [1]. There isn’t that much activity on the EXQuery repository [2], but maybe it could be discussed over there?

As an alternative, you can use the request:header function to retrieve the full value [3].

Best,

Christian

[1] http://exquery.github.io/exquery/exquery-restxq-specification/restxq-1.0-specification.html#form-header-annotation

[2] https://github.com/exquery/exquery/issues

[3] http://docs.basex.org/wiki/Request_Module#request:header

On Tue, May 29, 2018 at 1:49 PM, Marco Lettere <m.lettere@gmail.com> wrote:

Hello all,

need to use the If-Modified-Since header in one of my APIs. The format requested is the IETF date format:

If-Modified-Since: Wed, 21 Oct 2015 07:28:00 GMT

as explained in [1].

If I pass the header as prescribed to a restxq made like:

declare
  %rest:path("config")
  %rest:header-param("If-Modified-Since", "{$modifiedsince-ietf}")
  %rest:HEAD
function config:check($modifiedsince-ietf as xs:string?){

I get the following exception:

Cannot convert xs:string+ to xs:string?: ("Wed", "21 Oct 2015 07:28:00 GMT").

Which somehow demonstrates that , is treated as a separator of values for the header.

I patched by replacing ? with * and using a string-join on the $modifiedsince-ietf before passing it to the follwoing parse-ietf-date function. But this is hard to explain and probably subject to other issues in the future.

Is there a way to pass HTTP headers verbatim to the RestXQ function?

thanks!

M.


[1] https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/If-Modified-Since