Dear GeoServer users,
I am working with the rest api and I need to get a list of coverages from GeoServer via cURL but just those which are RGB products (layer name ending in “RGB”)
I read in here that almost everything you can do in the GUI can be done using cURL.
Please, could anybody point me to the right way to find out a solution?
Thank you very much,
Alberto
Hi Alberto,
if I understand your question correctly, you’re looking for a way to retrieve via the REST API all the layers whose name matches a certain pattern… but I’m afraid that is currently not possible.
Happy to be proven wrong anyways 
On Fri, Apr 15, 2016 at 6:43 PM, Alberto Callejas Delgado <alberto.callejas@anonymised.com> wrote:
Dear GeoServer users,
I am working with the rest api and I need to get a list of coverages from GeoServer via cURL but just those which are RGB products (layer name ending in “RGB”)
I read in here that almost everything you can do in the GUI can be done using cURL.
Please, could anybody point me to the right way to find out a solution?
Thank you very much,
Alberto
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Alberto,
the canonical way to discover resources via OGC web services is with a GetCapabilities request. In the case of WCS, you can discover the names of all enabled coverages. Use curl or any other HTTP client to retrieve the capabilities document, then parse it as XML with your language or tool of choice to extract the coverage names.
For example, for the release configuration of GeoServer, with curl output piped into the xpath tool (from the libxml-xpath-perl package on Debian; what is your platform?):
curl -s "http://localhost:8080/geoserver/wcs?service=WCS&version=2.0.1&request=GetCapabilities" | xpath -q -e '//wcs:CoverageId/text()'
Output:
nurc__Arc_Sample
nurc__Img_Sample
nurc__mosaic
sf__sfdem
Filter this output to obtain a list of coverages whose names end in "RGB". You can do exactly the same thing in Java, Python, or any other general purpose language with HTTP and XML parsing support.
Kind regards,
Ben.
On 16/04/16 04:43, Alberto Callejas Delgado wrote:
Dear GeoServer users,
I am working with the rest api and I need to get a list of coverages from
GeoServer via cURL but just those which are RGB products (layer name ending
in "RGB")I read in here that almost everything you can do in the GUI can be done
using cURL.Please, could anybody point me to the right way to find out a solution?
Thank you very much,
Alberto
------------------------------------------------------------------------------
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Applications Manager provides deep performance insights into multiple tiers of
your business applications. It resolves application problems quickly and
reduces your MTTR. Get your free trial!
https://ad.doubleclick.net/ddm/clk/302982198;130105516;z_______________________________________________
Geoserver-users mailing list
Geoserver-users@lists.sourceforge.net
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--
Ben Caradoc-Davies <ben@anonymised.com>
Director
Transient Software Limited <http://transient.nz/>
New Zealand
Alberto,
rather than filtering the output, you could also include a predicate in the XPath to select only the CoverageId elements you want:
$ curl -s 'http://localhost:8080/geoserver/wcs?service=WCS&version=2.0.1&request=GetCapabilities’ | xpath -q -e '//wcs:CoverageId/text()[contains(.,"Sample")]'
nurc__Arc_Sample
nurc__Img_Sample
This example is not strictly what you want if you only want to match a substring at the end of the CoverageId text. xpath appears to support only XPath 1.0 so does not support ends-with() (from XPath 2.0), but you can make your own with this ugly but effective construct:
$ curl -s 'http://localhost:8080/geoserver/wcs?service=WCS&version=2.0.1&request=GetCapabilities’ | xpath -q -e '//wcs:CoverageId/text()[substring(.,string-length(.)-string-length("Sample")+1)="Sample"]'
nurc__Arc_Sample
nurc__Img_Sample
In your case this would be:
curl -s 'http://localhost:8080/geoserver/wcs?service=WCS&version=2.0.1&request=GetCapabilities’ | xpath -q -e '//wcs:CoverageId/text()[substring(.,string-length(.)-string-length("RGB")+1)="RGB"]'
Kind regards,
Ben.
On 16/04/16 09:01, Ben Caradoc-Davies wrote:
Alberto,
the canonical way to discover resources via OGC web services is with a
GetCapabilities request. In the case of WCS, you can discover the names
of all enabled coverages. Use curl or any other HTTP client to retrieve
the capabilities document, then parse it as XML with your language or
tool of choice to extract the coverage names.For example, for the release configuration of GeoServer, with curl
output piped into the xpath tool (from the libxml-xpath-perl package on
Debian; what is your platform?):curl -s
"http://localhost:8080/geoserver/wcs?service=WCS&version=2.0.1&request=GetCapabilities"
| xpath -q -e '//wcs:CoverageId/text()'Output:
nurc__Arc_Sample
nurc__Img_Sample
nurc__mosaic
sf__sfdemFilter this output to obtain a list of coverages whose names end in
"RGB". You can do exactly the same thing in Java, Python, or any other
general purpose language with HTTP and XML parsing support.Kind regards,
Ben.On 16/04/16 04:43, Alberto Callejas Delgado wrote:
Dear GeoServer users,
I am working with the rest api and I need to get a list of coverages from
GeoServer via cURL but just those which are RGB products (layer name ending
in "RGB")I read in here that almost everything you can do in the GUI can be done
using cURL.Please, could anybody point me to the right way to find out a solution?
Thank you very much,
Alberto
------------------------------------------------------------------------------
Find and fix application performance issues faster with Applications Manager
Applications Manager provides deep performance insights into multiple tiers of
your business applications. It resolves application problems quickly and
reduces your MTTR. Get your free trial!
https://ad.doubleclick.net/ddm/clk/302982198;130105516;z_______________________________________________
Geoserver-users mailing list
Geoserver-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/geoserver-users
--
Ben Caradoc-Davies <ben@anonymised.com>
Director
Transient Software Limited <http://transient.nz/>
New Zealand
Hello Ben,
I really appreciate your help!
Definitely you have pointed the way out to solve my question.
Once I retrieve the. xml capabilities document I can extract the wcs:CoverageId using xml.etree.ElementTree
in Python (my platform is Windows).
It still surprises me the community support in GeoServer, it is just great.
I’ll get hands to work!
Alberto
On 16 April 2016 at 01:02, Ben Caradoc-Davies <ben@anonymised.com6881…> wrote:
Alberto,
rather than filtering the output, you could also include a predicate in the XPath to select only the CoverageId elements you want:
$ curl -s ‘http://localhost:8080/geoserver/wcs?service=WCS&version=2.0.1&request=GetCapabilities’ | xpath -q -e ‘//wcs:CoverageId/text()[contains(.,“Sample”)]’
nurc__Arc_Sample
nurc__Img_SampleThis example is not strictly what you want if you only want to match a substring at the end of the CoverageId text. xpath appears to support only XPath 1.0 so does not support ends-with() (from XPath 2.0), but you can make your own with this ugly but effective construct:
$ curl -s ‘http://localhost:8080/geoserver/wcs?service=WCS&version=2.0.1&request=GetCapabilities’ | xpath -q -e ‘//wcs:CoverageId/text()[substring(.,string-length(.)-string-length(“Sample”)+1)=“Sample”]’
nurc__Arc_Sample
nurc__Img_SampleIn your case this would be:
curl -s ‘http://localhost:8080/geoserver/wcs?service=WCS&version=2.0.1&request=GetCapabilities’ | xpath -q -e ‘//wcs:CoverageId/text()[substring(.,string-length(.)-string-length(“RGB”)+1)=“RGB”]’
Kind regards,
Ben.On 16/04/16 09:01, Ben Caradoc-Davies wrote:
Alberto,
the canonical way to discover resources via OGC web services is with a
GetCapabilities request. In the case of WCS, you can discover the names
of all enabled coverages. Use curl or any other HTTP client to retrieve
the capabilities document, then parse it as XML with your language or
tool of choice to extract the coverage names.For example, for the release configuration of GeoServer, with curl
output piped into the xpath tool (from the libxml-xpath-perl package on
Debian; what is your platform?):curl -s
“http://localhost:8080/geoserver/wcs?service=WCS&version=2.0.1&request=GetCapabilities”
| xpath -q -e ‘//wcs:CoverageId/text()’Output:
nurc__Arc_Sample
nurc__Img_Sample
nurc__mosaic
sf__sfdemFilter this output to obtain a list of coverages whose names end in
“RGB”. You can do exactly the same thing in Java, Python, or any other
general purpose language with HTTP and XML parsing support.Kind regards,
Ben.On 16/04/16 04:43, Alberto Callejas Delgado wrote:
Dear GeoServer users,
I am working with the rest api and I need to get a list of coverages from
GeoServer via cURL but just those which are RGB products (layer name ending
in “RGB”)I read in here that almost everything you can do in the GUI can be done
using cURL.Please, could anybody point me to the right way to find out a solution?
Thank you very much,
Alberto
Find and fix application performance issues faster with Applications Manager
Applications Manager provides deep performance insights into multiple tiers of
your business applications. It resolves application problems quickly and
reduces your MTTR. Get your free trial!
https://ad.doubleclick.net/ddm/clk/302982198;130105516;z
Geoserver-users mailing list
Geoserver-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/geoserver-users–
Ben Caradoc-Davies <ben@anonymised.com>
Director
Transient Software Limited <http://transient.nz/>
New Zealand