Re: [basex-talk] IETF Date in If-Modified-Since header

[Marco Lettere]

On 29/05/2018 13:58, Christian Grün wrote:

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?

Yes. Going to ask there.



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



Much better solution than mine! I'll follow this advice. Thanks!


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 > 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

Re: [basex-talk] IETF Date in If-Modified-Since header

[Christian Grün]

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  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
>
>

[basex-talk] IETF Date in If-Modified-Since header

[Marco Lettere]

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