Interesting idea, certainly not crazy. I'm not sure what's possible with regex libs commonly used with MapServer builds.
On Tue, Jul 27, 2021 at 6:34 AM Trond Michelsen < trondmm-mapserver+2...@crusaders.no> wrote: > This sounds like a good idea to me, but I would suggest to use named > capture groups. In perl, this uses this syntax: (?<name>pattern). So, > in this example, it could be: > > "datetime" "^(?<year>[0-9]{4})[-_](?<month>[0-9]{2})[-_](?<day>[0-9]{2})$" > # <- 3 capture groups > > And the result could then be used in substitution as: %year%, %month% > and %day%. Maybe with an added prefix, but I'd prefer without, tbh. > > On Tue, Jul 27, 2021 at 06:12:44AM +0000, Sommer, Ashley (L&W, Dutton > Park) wrote: > > Hi All, > > This is slightly related to my previous thread today, but more general. > > > > I want to gauge interested in this idea. > > I want to be able to use Runtime Substitution mechanisms to do something > like this: > > > > MAP > > ... > > VALIDATION > > "datetime" "^([0-9]{4})[-_]([0-9]{2})[-_]([0-9]{2})$" # <- 3 capture > groups > > END > > > > LAYER > > DATA "/mnt/dataset/%datetime_1%/%datetime_2%/%datetime_3%.tif" > > ... > > END > > ... > > END > > > > Where the query with &datetime=2018-01-29 is split into parts using > capture groups 1, 2, and 3 from the validation regex, and stored as new > runtime substitution variables: %datetime_1%, %datetime_2%, and > %datetime_3%. > > Then using these values, substitute them into the DATA string (or any > other valid substitution point). > > Substituted: > > DATA "/mnt/dataset/2018/01/29.tif" > > > > The regex mechanism to validate the incoming parameter value is already > in place, and it seems like just one more little step is needed to save the > captured groups into new runtime substitution variables. > > > > - Ashley Sommer > > > _______________________________________________ > > mapserver-users mailing list > > mapserver-users@lists.osgeo.org > > https://lists.osgeo.org/mailman/listinfo/mapserver-users > > > -- > Trond Michelsen > _______________________________________________ > mapserver-users mailing list > mapserver-users@lists.osgeo.org > https://lists.osgeo.org/mailman/listinfo/mapserver-users >
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