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<p class="MsoNormal">Easy solution – cool. You can do that with straight runsubs and relatively easy validation. Here’s a nice document on the topic
<a href="https://www.regextutorial.org/regex-for-numbers-and-ranges.php">https://www.regextutorial.org/regex-for-numbers-and-ranges.php</a>. I updated an existing ticket to clean that documentation up and remove some other cruft towards the bottom of that documentation.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b>From:</b> MapServer-users <mapserver-users-bounces@lists.osgeo.org>
<b>On Behalf Of </b>Tim Kempisty via MapServer-users<br>
<b>Sent:</b> Friday, October 7, 2022 10:34 AM<br>
<b>To:</b> Steve Lime <sdlime@gmail.com><br>
<b>Cc:</b> mapserver-users@lists.osgeo.org<br>
<b>Subject:</b> Re: [MapServer-users] mapserver 8 - CGI map_object substitutions broken?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<b><span style="color:#003865">This message may be from an external email source.</span></b><span style="color:#003865"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-element:frame;mso-element-frame-hspace:2.25pt;mso-element-wrap:around;mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:column;mso-height-rule:exactly">
<span style="font-size:9.0pt;color:#003865">Do not select links or open attachments unless verified. Report all suspicious emails to Minnesota IT Services Security Operations Center.<o:p></o:p></span></p>
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<p class="MsoNormal">Well that's... not shocking. I'm imagining the regex that might sanitize a URL with all that syntax in it... uuuuughh... *crumplecrumplecrumple* ~toss~ <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">As for my own work... I realized yesterday late that I was going to have to find an alternative anyway. All these maps need to go into Mapcache. Turning that map_object notation into an intuitive mapcache dimension is a big ol Nope. I
can likely pass in a parameter on the URL (&fontsize=10) and then use multiple classes in the vein of CLASS: EXPRESSION (%fontsize% = 10). Voila. Easy mapcache dimension, easy sanitizing, supports a reasonable number of font sizes.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">So I guess the item for the maintainers to fix is actually the documentation ( <a href="https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fmapserver.org%2Fcgi%2Fcontrols.html&data=05%7C01%7Csteve.lime%40state.mn.us%7Cf22fba2aefea49f12a1d08daa8796427%7Ceb14b04624c445198f26b89c2159828c%7C0%7C0%7C638007536586118020%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=SS4mdPY1dc5Xt5sSI1AKVWn1OmgvK9pTadrLVZ4GORY%3D&reserved=0">https://mapserver.org/cgi/controls.html</a> )
which still makes it look like you can use map_object notation on the URL in MS8. <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Thanks for the info!<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">-Tim<o:p></o:p></p>
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<p class="MsoNormal"><br>
<br>
<o:p></o:p></p>
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<p class="MsoNormal">On Oct 6, 2022, at 3:49 PM, Steve Lime <<a href="mailto:sdlime@gmail.com">sdlime@gmail.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hi Tim: I was wondering if I'd see any messages on that topic. Short story is that the functionality was removed in MS8. I never liked the all-or-nothing aspect of it and was working on a method to control which objects would be allowed
to be updated. The solutions I came up with were convoluted and were going to add a lot of complexity to the codebase for little value. That functionality is poorly documented and by itself overly complicates the code. So after a note to mapserver-users trying
to judge how much it was used - with limited replies - it was decided to remove it. I'm dealing with my own upgrade issues as a result, but it's worth it in the end IMHO.
<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">If necessary, it's better to revisit with another method - ideally something along the lines of runsubs. The challenge is specifying when to apply them and how to validate values. Strings are easy, but numeric/color values aren't so we'd
need to do something like add runtime bindings (similar to attribute bindings) so you'd write SIZE %mysize% instead. One advantage being you could reuse the variable across layers.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">So, what are the options right now? It sort of depends on your needs. Do you need to only support a couple of sizes for a class or do you truly need *any* size? Options include:<o:p></o:p></p>
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<li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level1 lfo1">
multiple mapfiles - probably using includes to limit redundancy<o:p></o:p></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level1 lfo1">
class groups<o:p></o:p></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level1 lfo1">
if you're using a db backend I think attribute bindings could work paired with runsubs<o:p></o:p></li></ul>
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<p class="MsoNormal">DATA "shape FROM (select *, %textsize% AS textsize FROM ...)<o:p></o:p></p>
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<p class="MsoNormal">VALIDATION<o:p></o:p></p>
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<p class="MsoNormal"> "textsize_default" "13"<o:p></o:p></p>
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<p class="MsoNormal"> "textsize" "^8|10|12|14$"<o:p></o:p></p>
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<p class="MsoNormal">END<o:p></o:p></p>
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<p class="MsoNormal">CLASS<o:p></o:p></p>
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<p class="MsoNormal"> LABEL<o:p></o:p></p>
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<p class="MsoNormal"> SIZE [textsize] # I think attribute binding works here<o:p></o:p></p>
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<p class="MsoNormal"> END<o:p></o:p></p>
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<p class="MsoNormal">END<o:p></o:p></p>
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<ul type="disc">
<li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo2">
MapScript - load the mapfile, do the changes you need, render the map<o:p></o:p></li></ul>
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<p class="MsoNormal">Happy to discuss further and perhaps other folks have ideas.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">--Steve<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Thu, Oct 6, 2022 at 12:47 PM Tim Kempisty via MapServer-users <<a href="mailto:mapserver-users@lists.osgeo.org">mapserver-users@lists.osgeo.org</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">Good afternoon, all. <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I am migrating a project from MS7 to the new Mapserver 8.0.0, and I've stumbled upon evidence that map_object notation support for CGI variable substitution may be broken.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Here's the relevant doc for CGI Controls:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><a href="https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fmapserver.org%2Fcgi%2Fcontrols.html&data=05%7C01%7Csteve.lime%40state.mn.us%7Cf22fba2aefea49f12a1d08daa8796427%7Ceb14b04624c445198f26b89c2159828c%7C0%7C0%7C638007536586118020%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=SS4mdPY1dc5Xt5sSI1AKVWn1OmgvK9pTadrLVZ4GORY%3D&reserved=0" target="_blank">https://mapserver.org/cgi/controls.html</a> <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Scoll down to the heading: "Changing map file parameters via a form or a URL" <o:p></o:p></p>
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<p class="MsoNormal">We have been using the map_object notation method to set custom image sizes and font sizes.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Excuse the messy query string. The important parts are "&map_size" and "&map.layer[...]"<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Courier New"">/var/www/cgi-bin/mapserv.cgi -nh "QUERY_STRING=mode=map&map=/usr/local/mapfiles/kempisty/nbm_view/foo.map&layer=genNoDec&model=blend&ver=v4.0§or=conus&element=maxt&issuancetime=2022-10-06T14:00&validtime=2022-10-08T06:00&mapext=-3270279.3477121103%20-163255.0404466032%202666810.2533767014%203144901.0582670807&map_size=1215+677&map.layer[genNoDec].class[0].label[0]=SIZE+8"
> /var/www/html/kempisty/foo7.png<o:p></o:p></span></p>
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<p class="MsoNormal"><br>
<br>
<o:p></o:p></p>
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<p class="MsoNormal">MS7 gives a map size 1215x677 with labels rendered in 8 point font, as expected. The same command, using mapserver 8 instead of 7, gives an image size 2345x1597 (map size as defined in the mapfile) with labels rendered in 13 point font
(also as defined in the mapfile).<o:p></o:p></p>
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<p class="MsoNormal"><br>
<br>
<o:p></o:p></p>
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<p class="MsoNormal">Using MS8... if I send &mapsize=1215+677 instead of &map_size=1215+677 ... I will get the image at the correct size. So the predefined CGI control variables still work. It suggests to me, it is only the map_object notation method that
is broken. Has that been disabled in MS8, or is it now subject to a new configuration requirement that I'm not aware of?<o:p></o:p></p>
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<p class="MsoNormal"><br>
<br>
<o:p></o:p></p>
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<p class="MsoNormal">Relevant string isolated for reference:<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Courier New"">&map_size=1215+677&map.layer[genNoDec].class[0].label[0]=SIZE+8"</span><o:p></o:p></p>
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<p class="MsoNormal"><br>
<br>
<o:p></o:p></p>
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<p class="MsoNormal">I'm open to other methods of changing font size on the fly. We did it this way because %var% runtime substitutions aren't supported for CLASS: LABEL: SIZE.<o:p></o:p></p>
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<p class="MsoNormal"><br>
<br>
<o:p></o:p></p>
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<p class="MsoNormal">-Tim Kempisty<o:p></o:p></p>
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<p class="MsoNormal"><br>
<br>
<o:p></o:p></p>
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