[Geoserver-devel] About scripting in geoserver

INFANTE_Jorge_Luis · August 5, 2016, 11:45am

Hi to all.
I did resolve (after a lot of research), my first problem:
I can get from geoserver, in a wps jython process, the layer’s catalog authorized to me.
The little program:

from geoserver.wps import process
from geoscript.geom import Geometry
from geoserver.catalog import Catalog, Workspace, Layer, Store
import org.springframework.security.core.context.SecurityContextHolder as SecurityContextHolder
import org.geoserver.catalog as catalog
from org.geoserver.platform import GeoServerExtensions

@process(
title=‘Sample’,
description=‘Sample’,
inputs={‘login’: (str, ‘login’),
‘password’: (str, ‘password’)},
outputs={‘result’: (str, ‘login status’)})

def run(login, password):
user=SecurityContextHolder.getContext().getAuthentication()
debug_file=“/tmp/geoserver.log”
f=open(debug_file, “a”)
f.write(str(user.getAuthorities().size()))
if user==None or user.getAuthorities().size()==0:
f.write(“anonymous access\n”)
else:
f.write(str(SecurityContextHolder.getContext().getAuthentication().getAuthorities()))

Devuelve: [ROLE_AUTHENTICATED, ROLE_ADMINISTRATOR, ROLE_CARTOGRAFIA_RO, ROLE_GROUP_ADMIN]

f.write(“\n”)

cat=Catalog()
try:
for workspace in cat.keys():
w=Workspace(workspace)
for datastore in w.keys():
d=Store(datastore)
for layer in d.keys():
l=Layer(layer)
cat1=GeoServerExtensions.bean(‘catalog’)
store1=cat1.getStoreByName(workspace, datastore, catalog.StoreInfo)
if store1 is None:
type=“”
else:
ft=cat1.getFeatureTypeByDataStore(store1, layer)
type=str(ft.getFeatureType().getGeometryDescriptor().getType())
type=type.split(" “)[1]
f.write(type+”|“+workspace+”:“+layer+”|“+l.title+”|“+”\n")

except Exception, e:
f.write(str(e)+“\n”)
pass

But, now, I need:
a) wath is the vartype on outputs to return a string list?. I’m writting to a local file, to do debug, but, I’m thinking to talk with a specific plugin in qgis.
b) I’d like to do better code (I’m using catalog, workspace, store and layer extensions, but, I’m thinking I can to access to the java api, like I’m using springframework api). Any idea? All information I did obtain from the source code.
c) I’d like to know my access level to each layer, to show to the user.

Can any help me?

Thanks a lot in advance

jorge infante
rosario - santa fe - argentina

···

2016-07-07 7:40 GMT-03:00 Jorge Infante <joluinfante@anonymised.com>:

I’m seeing my problem is:

The caller is putting user and password.

The wps python script is running in anonymous mode.

What is the method to init the session on geoserver (from wps python script) with the user and password received?

TIA

jorge infante

2016-07-05 17:40 GMT-03:00 Jorge Infante <joluinfante@anonymised.com>:

Is not working.
I did try with --user and --http-user, and, I’m receiving:

–2016-07-05 17:38:12-- http://localhost:8080/geoserver/wps?service=WPS&version=1.0.0&request=Execute&identifier=py:sample1&datainputs=param1=xx;param2=xx
Resolving localhost (localhost)… ::1, 127.0.0.1
Connecting to localhost (localhost)|::1|:8080… connected.
HTTP request sent, awaiting response… 200 OK
Length: unspecified [application/xml]
Saving to: ‘STDOUT’

[<=> ] 0 --.-KB/s <
?xml version=“1.0” encoding=“UTF-8”?><wps:ExecuteResponse xmlns:xs=“http://www.w3.org/2001/XMLSc
hema” xmlns:wps=“http://www.opengis.net/wps/1.0.0” xmlns:ows=“http://www.opengis.net/ows/1.1” xm
lns:xlink=“http://www.w3.org/1999/xlink” xml:lang=“en” service=“WPS” serviceInstance=“http://loc
alhost:8080/geoserver/ows?” version=“1.0.0”><wps:Process wps:processVersion=“1.0.0”><ows:Identif
ier>py:sample1</ows:Identifier>ows:TitleSample</ows:Title>ows:AbstractSample</ows:Abstract><
/wps:Process><wps:Status creationTime=“2016-07-05T20:38:12.595Z”>wps:ProcessFailed<ows:Excepti
onReport version=“1.1.0”><ows:Exception exceptionCode=“NoApplicableCode”>ows:ExceptionTextProc
ess failed during execution
Traceback (most recent call last):
File "pyclasspath/geoserver/wps.py", line 19, in wrapped
File "/instalar/geoserver/geoserver-2.8.1/bin/…/data_dir/scripts/wps/sample1.py&
quot;, line 24, in run
manzanas=Layer('muni:manzanas') ← I can’t to access because the access was by anonymous
File "pyclasspath/geoserver/catalog/layer.py", line 54, in init
Exception: Unable to find store for layer muni:manzanas
</ows:ExceptionText></ows:Exception></ows:ExceptionReport></wps:ProcessFailed></wps:Status></wps

[ <=> ] 1.22K --.-KB/s in 0s

2016-07-05 17:38:12 (78.7 MB/s) - written to stdout [1251]

The wps/python script:

from geoserver.wps import process
from geoserver.catalog import Catalog, Workspace, Layer

@process(
title=‘Sample’,
description=‘Sample’,
inputs={‘login’: (str, ‘login’),
‘password’: (str, ‘password’)},
outputs={‘result’: (str, ‘login status’)})

def run(login, password):
debug_file=“/tmp/geoserver.log”
f=open(debug_file, “a”)
f.write(“login=”+login+" password=“+password+”\n")
cat=Catalog()
f.write(str(cat.keys()))
f.write(“\n”)

topp=Workspace(‘muni’)
f.write(topp.name+“\n”)
f.write(topp.uri+“\n”)
f.write(str(topp.keys()))
f.write(“\n”)
manzanas=Layer(‘muni:manzanas’)
f.write(manzanas.name+“\n”)
f.write(str(manzanas.data.schema)+“\n”)
f.write(str(manzanas.data.count())+“\n”)
f.close()
return “OK”;

2016-07-05 9:05 GMT-03:00 Ian Turton <ijturton@anonymised.com>:

You need to provide the --user & --password options to WGET or if you use curl the option is -u username:passwd

Ian

On 5 July 2016 at 12:16, Jorge Infante <joluinfante@anonymised.com> wrote:

Hi!
I’m trying to execute my wps script, using wget (to test), but, I need “login to geoserver” (like “Authenticate (will run the request as anonymous otherwise” checkbox on “WPS request builder”).
What is the method to do it?

I’m using the sentence:
wget “http://localhost:8080/geoserver/wps?service=WPS&version=1.0.0&request=Execute&identifier=py:sample1&datainputs=param1=xx;param2=yy” -O -

Thanks

jorge infante
rosario - santa fe - argentina

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Ian Turton

2016-06-29 8:21 GMT-03:00 Jorge Infante <joluinfante@anonymised.com>:

Ok. I did resolve it:

from geoserver.wps import process
#from geoscript.geom import Geometry
from StringIO import StringIO

@process(
title=‘Sample’,
description=‘Sample’,
inputs={‘arg1’: (int, ‘first argument’),
‘arg2’: (int, ‘second argument’)},
outputs={‘result’: (str, ‘The buffered geometry’)}
)
def run(arg1, arg2):
#return “hello world”;
return str(arg1+arg2);

I’ll continue working on it. Thanks for the help.

2016-06-29 8:06 GMT-03:00 Jorge Infante <joluinfante@anonymised.com>:

Ok, Justin.
I’m trying to use wps to implement my service.
I did try a basic “hello world” sample. My sample try to return a string with “hello world”:

#more scripts/wps/sample.py

from geoserver.wps import process
from StringIO import StringIO

@process(
title=‘Sample’,
description=‘Sample’,
inputs={},
outputs={‘result’: (StringIO, ‘The constant hello world’)}
)
def run():
buff = StringIO(“hello world”)
return buff;

When I try to execute the process with:
wget “http://localhost:8080/geoserver/wps?service=WPS&version=1.0.0&request=Execute&identifier=py:sample” -O -

I don’t have errors, but, I can’t to see the “hello world” text.
I’m thinking the problem is the output definition. What is the list of datatypes on this?

2016-06-02 10:33 GMT-03:00 Justin Deoliveira <jdeolive@…403…>:

Hi Jorge,

The docs you are looking at are for the old “python” extension that pre-dates the “script” extension. You should follow the documentation located here:

http://docs.geoserver.org/stable/en/user/community/scripting/index.html

In particular if you are looking to hook into wps you can find some details and samples here:

http://docs.geoserver.org/stable/en/user/community/scripting/hooks.html#web-processing-service

Hope that helps.

-Justin

On Thu, Jun 2, 2016 at 5:36 AM Jorge Infante <joluinfante@anonymised.com> wrote:

Hi.
I’m using geoserver 2.8.1, builded from sources, and on runtime format.

I’m trying to run python code to do customs, in geoserver.

I did install the wps extension, create the data_dir/scripts/wps directory, and put my sample.py on it.
I’m not getting type py:sample on the demo/wps request builder.
I did detect (in the builded from sources version), a message “2016-06-01 18:14:22,784 DEBUG [script.wps] - Skipping sample.py, no hook found”

I did try, too, to install the python extension (documented on http://docs.geoserver.org/2.6.x/en/user/community/python/installation.html).
This method is no longer available in versions 2.8.x or higher? It was replaced by something else?

Surely I’m wrong in the process. someone can give me a hint?

TIA

jorge infante
rosario - santa fe - argentina

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