Thanks Rich, I'll add it into the MigrationGuide today, great catch.
-jeff
--
Jeff McKenna
GatewayGeo: Developers of MS4W, MapServer Consulting and Training
co-founder of FOSS4G
http://gatewaygeo.com/
On 2022-08-29 10:18 a.m., Richard Greenwood wrote:
Rahkonen,
Thank you for the explanation of the WMS definitions, but my point is
that this is a breaking change from MapServer map files prior to 8.0.
The change does not return an error message that helps the user identify
the problem, so I thought that it might be helpful to note the change in
the migration guide:
https://mapserver.org/MIGRATION_GUIDE.html#migration-8-0
<https://mapserver.org/MIGRATION_GUIDE.html#migration-8-0>
On Mon, Aug 29, 2022 at 5:10 AM Rahkonen Jukka
<[email protected]
<mailto:[email protected]>> wrote:
Hi,____
__ __
So no need for the “opaque container” that is actually kind of a
hack in Geoserver. In WMS normal layers must have names, this is
from WMS 1.3.0 standard:____
7.2.4.6.3 Name____
If, and only if, a layer has a <Name>, then it is a map layer that
can be requested by using that Name in the____
LAYERS parameter of a GetMap request. A Layer that contains a <Name>
element is referred to as a “named____
layer” in this International Standard. If the layer has a Title but
no Name, then that layer is only a category title for____
all the layers nested within. A server that advertises a Layer
containing a Name element shall be able to accept____
that Name as the value of LAYERS argument in a GetMap request and
return the corresponding map. A client____
shall not attempt to request a layer that has a Title but no Name.____
__ __
There is something documented about the layer names in
https://mapserver.gis.umn.edu/ogc/wms_server.html
<https://mapserver.gis.umn.edu/ogc/wms_server.html> but not really
that the rules apply also if layer belongs to a group:____
__ __
“Layer Name and wms_title metadata:____
__ __
Every individual layer needs its own unique name and title. Layer
names are also used in GetMap and GetFeatureInfo requests to refer
to layers that should be included in the map output and in the
query. Layer names must start with a letter when setting up a WMS
server (layer names should not start with a digit or have spaces in
them).”____
__ __
-Jukka Rahkonen-____
__ __
__ __
*Lähettäjä:* Richard Greenwood <[email protected]
<mailto:[email protected]>>
*Lähetetty:* maanantai 29. elokuuta 2022 13.40
*Vastaanottaja:* Rahkonen Jukka <[email protected]
<mailto:[email protected]>>
*Kopio:* Seth G <[email protected]
<mailto:[email protected]>>; MapServer Devs
<[email protected] <mailto:[email protected]>>
*Aihe:* Re: [MapServer-dev] Possibly undocumented 8.0 change____
__ __
No, just laziness. It's not a big deal, but maybe should be
documented. ____
__ __
On Mon, Aug 29, 2022, 11:58 AM Rahkonen Jukka
<[email protected]
<mailto:[email protected]>> wrote:____
Hi Richard,____
____
Is your aim with using GROUP without NAME to hide the layer from
GetCapabilities so that users cannot see or request that layer
separately but only as a member of a group? Like “opaque
container” in Geoserver
https://docs.geoserver.org/latest/en/user/data/webadmin/layergroups.html
<https://eur06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdocs.geoserver.org%2Flatest%2Fen%2Fuser%2Fdata%2Fwebadmin%2Flayergroups.html&data=05%7C01%7Cjukka.rahkonen%40maanmittauslaitos.fi%7C4e29f6da035b41ae58da08da89aace2d%7Cc4f8a63255804a1c92371d5a571b71fa%7C0%7C0%7C637973663938909073%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=fqqIU8Ul9FjwpjHXKlWjAMqT9OGaL7oLQFLdoKnjxto%3D&reserved=0>____
____
-Jukka Rahkonen-____
____
____
____
*Lähettäjä:* Seth G <[email protected]
<mailto:[email protected]>>
*Lähetetty:* maanantai 29. elokuuta 2022 10.45
*Vastaanottaja:* Richard Greenwood <[email protected]
<mailto:[email protected]>>; Rahkonen Jukka
<[email protected]
<mailto:[email protected]>>
*Kopio:* MapServer Devs <[email protected]
<mailto:[email protected]>>
*Aihe:* Re: [MapServer-dev] Possibly undocumented 8.0 change____
____
Hi Richard,____
____
Could you create an issue for this on GitHub?____
It looks like it could relate to the move to C++.____
Thanks,____
____
Seth____
____
--____
web:https://geographika.net
<https://eur06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgeographika.net%2F&data=05%7C01%7Cjukka.rahkonen%40maanmittauslaitos.fi%7C4e29f6da035b41ae58da08da89aace2d%7Cc4f8a63255804a1c92371d5a571b71fa%7C0%7C0%7C637973663938909073%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=DS8KRO6ZFREovCqteYci3oD%2B9sDxjv2TTCHbANGJJaI%3D&reserved=0>____
twitter: @geographika____
____
____
On Mon, Aug 29, 2022, at 9:34 AM, Richard Greenwood wrote:____
An empty string for the NAME works without error. I set
the MS_DEBUGLEVEL to 5 and nothing is written to the error
file when this error occurs.____
____
On Mon, Aug 29, 2022 at 12:44 AM Rahkonen Jukka
<[email protected]
<mailto:[email protected]>> wrote:____
Hi,____
____
What happens if you use an empty NAME?____
____
-Jukka Rahkonen-____
____
*Lähettäjä:* MapServer-dev
<[email protected]
<mailto:[email protected]>>
*Puolesta *Richard Greenwood____
*Lähetetty:* maanantai 29. elokuuta 2022 9.06____
*Vastaanottaja:* Seth G <[email protected]
<mailto:[email protected]>>____
*Kopio:* MapServer Devs <[email protected]
<mailto:[email protected]>>____
*Aihe:* Re: [MapServer-dev] Possibly undocumented 8.0
change____
____
Yes, it's with a WMS request. Apache throws a 500 error
"End of script output before headers". I define a LAYER
with a GROUP but no NAME. I don't believe METADATA plays
into it because I commented out the METADATA block and
it fails in the same way.____
____
On Sun, Aug 28, 2022 at 3:07 PM Seth G
<[email protected]
<mailto:[email protected]>> wrote:____
Hi Richard,____
____
Do you have more details - is this when using WMS?
Is there an error that appears?____
For WMS there is a known conflict between GROUP and
wms_layer_group in a METADATA block, but this sounds
like something different.____
____
Seth____
____
--____
web:https://geographika.net
<https://eur06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgeographika.net%2F&data=05%7C01%7Cjukka.rahkonen%40maanmittauslaitos.fi%7C4e29f6da035b41ae58da08da89aace2d%7Cc4f8a63255804a1c92371d5a571b71fa%7C0%7C0%7C637973663938909073%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=DS8KRO6ZFREovCqteYci3oD%2B9sDxjv2TTCHbANGJJaI%3D&reserved=0>____
twitter: @geographika____
____
____
On Sun, Aug 28, 2022, at 3:53 PM, Richard Greenwood
wrote:____
I didn't see mention of this in the docs,
apologies if I missed it. It appears that as of
8.0 a layer must have a NAME. In the past it has
been possible for a layer not to have a NAME if
it had a GROUP.____
____
-- ____
Richard W. Greenwood____
www.greenwoodmap.com
<https://eur06.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.greenwoodmap.com%2F&data=05%7C01%7Cjukka.rahkonen%40maanmittauslaitos.fi%7C4e29f6da035b41ae58da08da89aace2d%7Cc4f8a63255804a1c92371d5a571b71fa%7C0%7C0%7C637973663938909073%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=42axJiUotL4lrds1YbVXt8cc7Ed0IC%2B2IlySiRF5R3Q%3D&reserved=0>____
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____
____
-- ____
Richard W. Greenwood____
www.greenwoodmap.com
<https://eur06.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.greenwoodmap.com%2F&data=05%7C01%7Cjukka.rahkonen%40maanmittauslaitos.fi%7C4e29f6da035b41ae58da08da89aace2d%7Cc4f8a63255804a1c92371d5a571b71fa%7C0%7C0%7C637973663938909073%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=42axJiUotL4lrds1YbVXt8cc7Ed0IC%2B2IlySiRF5R3Q%3D&reserved=0>____
____
____
-- ____
Richard W. Greenwood____
www.greenwoodmap.com
<https://eur06.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.greenwoodmap.com%2F&data=05%7C01%7Cjukka.rahkonen%40maanmittauslaitos.fi%7C4e29f6da035b41ae58da08da89aace2d%7Cc4f8a63255804a1c92371d5a571b71fa%7C0%7C0%7C637973663938909073%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=42axJiUotL4lrds1YbVXt8cc7Ed0IC%2B2IlySiRF5R3Q%3D&reserved=0>____
____
--
Richard W. Greenwood
www.greenwoodmap.com <http://www.greenwoodmap.com>
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