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metadata.py
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metadata.py
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# -*- coding: ISO-8859-15 -*-
# =================================================================
#
# Authors: Tom Kralidis <tomkralidis@gmail.com>
#
# Copyright (c) 2011 Tom Kralidis
#
# Permission is hereby granted, free of charge, to any person
# obtaining a copy of this software and associated documentation
# files (the "Software"), to deal in the Software without
# restriction, including without limitation the rights to use,
# copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following
# conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
# OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
# HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
# OTHER DEALINGS IN THE SOFTWARE.
#
# =================================================================
import logging
import uuid
from urlparse import urlparse
from lxml import etree
from owslib.util import build_get_url
from pycsw import util
LOGGER = logging.getLogger(__name__)
def parse_record(context, record, repos=None,
mtype='http://www.opengis.net/cat/csw/2.0.2',
identifier=None, pagesize=10):
''' parse metadata '''
if identifier is None:
identifier = uuid.uuid4().get_urn()
# parse web services
if (mtype == 'http://www.opengis.net/cat/csw/2.0.2' and
isinstance(record, str) and record.startswith('http')):
LOGGER.debug('CSW service detected, fetching via HTTP')
# CSW service, not csw:Record
try:
return _parse_csw(context, repos, record, identifier, pagesize)
except Exception, err:
# TODO: implement better exception handling
if str(err).find('ExceptionReport') != -1:
msg = 'CSW harvesting error: %s' % str(err)
LOGGER.debug(msg)
raise RuntimeError(msg)
LOGGER.debug('Not a CSW, attempting to fetch Dublin Core')
try:
content = util.http_request('GET', record)
except Exception, err:
raise RuntimeError('HTTP error: %s' % str(err))
return [_parse_dc(context, repos, etree.fromstring(content))]
elif mtype == 'urn:geoss:waf': # WAF
LOGGER.debug('WAF detected, fetching via HTTP')
return _parse_waf(context, repos, record, identifier)
elif mtype == 'http://www.opengis.net/wms': # WMS
LOGGER.debug('WMS detected, fetching via OWSLib')
return _parse_wms(context, repos, record, identifier)
elif mtype == 'http://www.opengis.net/wps/1.0.0': # WPS
LOGGER.debug('WPS detected, fetching via OWSLib')
return [_parse_wps(context, repos, record, identifier)]
elif mtype == 'http://www.opengis.net/wfs': # WFS
LOGGER.debug('WFS detected, fetching via OWSLib')
return _parse_wfs(context, repos, record, identifier)
elif mtype == 'http://www.opengis.net/wcs': # WCS
LOGGER.debug('WCS detected, fetching via OWSLib')
return _parse_wcs(context, repos, record, identifier)
elif mtype == 'http://www.opengis.net/sos/1.0': # SOS 1.0.0
LOGGER.debug('SOS 1.0.0 detected, fetching via OWSLib')
return _parse_sos(context, repos, record, identifier, '1.0.0')
elif mtype == 'http://www.opengis.net/sos/2.0': # SOS 2.0.0
LOGGER.debug('SOS 2.0.0 detected, fetching via OWSLib')
return _parse_sos(context, repos, record, identifier, '2.0.0')
elif (mtype == 'http://www.opengis.net/cat/csw/csdgm' and
record.startswith('http')): # FGDC
LOGGER.debug('FGDC detected, fetching via HTTP')
record = util.http_request('GET', record)
return _parse_metadata(context, repos, record)
def _set(context, obj, name, value):
''' convenience method to set values '''
setattr(obj, context.md_core_model['mappings'][name], value)
def _parse_metadata(context, repos, record):
"""parse metadata formats"""
if isinstance(record, str):
exml = etree.fromstring(record)
else: # already serialized to lxml
if hasattr(record, 'getroot'): # standalone document
exml = record.getroot()
else: # part of a larger document
exml = record
root = exml.tag
LOGGER.debug('Serialized metadata, parsing content model')
if root == '{%s}MD_Metadata' % context.namespaces['gmd']: # ISO
return [_parse_iso(context, repos, exml)]
elif root == '{http://www.isotc211.org/2005/gmi}MI_Metadata':
# ISO Metadata for Imagery
return [_parse_iso(context, repos, exml)]
elif root == 'metadata': # FGDC
return [_parse_fgdc(context, repos, exml)]
elif root == '{%s}Record' % context.namespaces['csw']: # Dublin Core CSW
return [_parse_dc(context, repos, exml)]
elif root == '{%s}RDF' % context.namespaces['rdf']: # Dublin Core RDF
return [_parse_dc(context, repos, exml)]
elif root == '{%s}DIF' % context.namespaces['dif']: # DIF
pass # TODO
else:
raise RuntimeError('Unsupported metadata format')
def _parse_csw(context, repos, record, identifier, pagesize=10):
from owslib.csw import CatalogueServiceWeb
recobjs = [] # records
serviceobj = repos.dataset()
# if init raises error, this might not be a CSW
md = CatalogueServiceWeb(record)
# generate record of service instance
_set(context, serviceobj, 'pycsw:Identifier', identifier)
_set(context, serviceobj, 'pycsw:Typename', 'csw:Record')
_set(context, serviceobj, 'pycsw:Schema', 'http://www.opengis.net/cat/csw/2.0.2')
_set(context, serviceobj, 'pycsw:MdSource', record)
_set(context, serviceobj, 'pycsw:InsertDate', util.get_today_and_now())
_set(context, serviceobj, 'pycsw:XML', md.response)
_set(context, serviceobj, 'pycsw:AnyText', util.get_anytext(md._exml))
_set(context, serviceobj, 'pycsw:Type', 'service')
_set(context, serviceobj, 'pycsw:Title', md.identification.title)
_set(context, serviceobj, 'pycsw:Abstract', md.identification.abstract)
_set(context, serviceobj, 'pycsw:Keywords', ','.join(md.identification.keywords))
_set(context, serviceobj, 'pycsw:Creator', md.provider.contact.name)
_set(context, serviceobj, 'pycsw:Publisher', md.provider.name)
_set(context, serviceobj, 'pycsw:Contributor', md.provider.contact.name)
_set(context, serviceobj, 'pycsw:OrganizationName', md.provider.contact.name)
_set(context, serviceobj, 'pycsw:AccessConstraints', md.identification.accessconstraints)
_set(context, serviceobj, 'pycsw:OtherConstraints', md.identification.fees)
_set(context, serviceobj, 'pycsw:Source', record)
_set(context, serviceobj, 'pycsw:Format', md.identification.type)
_set(context, serviceobj, 'pycsw:ServiceType', md.identification.type)
_set(context, serviceobj, 'pycsw:ServiceTypeVersion', md.identification.version)
_set(context, serviceobj, 'pycsw:Operation', ','.join([d.name for d in md.operations]))
_set(context, serviceobj, 'pycsw:CouplingType', 'tight')
links = [
'%s,OGC-CSW Catalogue Service for the Web,OGC:CSW,%s' % (identifier, md.url)
]
_set(context, serviceobj, 'pycsw:Links', '^'.join(links))
recobjs.append(serviceobj)
# get all supported typenames of metadata
# so we can harvest the entire CSW
csw_typenames = 'csw:Record'
# now get all records
# get total number of records to loop against
try:
md.getrecords2(typenames=csw_typenames, resulttype='hits')
matches = md.results['matches']
except: # this is a CSW, but server rejects query
raise RuntimeError(md.response)
if pagesize > matches:
pagesize = matches
LOGGER.debug('Harvesting %d CSW records' % matches)
# loop over all catalogue records incrementally
for r in range(1, matches, pagesize):
try:
md.getrecords2(typenames=csw_typenames, startposition=r,
maxrecords=pagesize)
except Exception, err: # this is a CSW, but server rejects query
raise RuntimeError(md.response)
for k, v in md.records.iteritems():
recobjs.append(_parse_dc(context, repos, etree.fromstring(v.xml)))
return recobjs
def _parse_waf(context, repos, record, identifier):
recobjs = []
content = util.http_request('GET', record)
LOGGER.debug(content)
try:
parser = etree.HTMLParser()
tree = etree.fromstring(content, parser=parser)
except Exception, err:
raise Exception('Could not parse WAF: %s' % str(err))
up = urlparse(record)
links = []
LOGGER.debug('collecting links')
for link in tree.xpath('//a/@href'):
link = link.strip()
if not link:
continue
if link.find('?') != -1:
continue
if not link.endswith('.xml'):
LOGGER.debug('Skipping, not .xml')
continue
if '/' in link: # path is embedded in link
if link[-1] == '/': # directory, skip
continue
if link[0] == '/':
# strip path of WAF URL
link = '%s://%s%s' % (up.scheme, up.netloc, link)
else: # tack on href to WAF URL
link = '%s/%s' % (record, link)
LOGGER.debug('URL is: %s', link)
links.append(link)
LOGGER.debug('%d links found', len(links))
for link in links:
LOGGER.debug('Processing link %s', link)
# fetch and parse
linkcontent = util.http_request('GET', link)
recobj = _parse_metadata(context, repos, linkcontent)[0]
recobj.source = link
recobj.mdsource = link
recobjs.append(recobj)
return recobjs
def _parse_wms(context, repos, record, identifier):
from owslib.wms import WebMapService
recobjs = []
serviceobj = repos.dataset()
md = WebMapService(record)
# generate record of service instance
_set(context, serviceobj, 'pycsw:Identifier', identifier)
_set(context, serviceobj, 'pycsw:Typename', 'csw:Record')
_set(context, serviceobj, 'pycsw:Schema', 'http://www.opengis.net/wms')
_set(context, serviceobj, 'pycsw:MdSource', record)
_set(context, serviceobj, 'pycsw:InsertDate', util.get_today_and_now())
_set(context, serviceobj, 'pycsw:XML', md.getServiceXML())
_set(context, serviceobj, 'pycsw:AnyText', util.get_anytext(md.getServiceXML()))
_set(context, serviceobj, 'pycsw:Type', 'service')
_set(context, serviceobj, 'pycsw:Title', md.identification.title)
_set(context, serviceobj, 'pycsw:Abstract', md.identification.abstract)
_set(context, serviceobj, 'pycsw:Keywords', ','.join(md.identification.keywords))
_set(context, serviceobj, 'pycsw:Creator', md.provider.contact.name)
_set(context, serviceobj, 'pycsw:Publisher', md.provider.name)
_set(context, serviceobj, 'pycsw:Contributor', md.provider.contact.name)
_set(context, serviceobj, 'pycsw:OrganizationName', md.provider.contact.name)
_set(context, serviceobj, 'pycsw:AccessConstraints', md.identification.accessconstraints)
_set(context, serviceobj, 'pycsw:OtherConstraints', md.identification.fees)
_set(context, serviceobj, 'pycsw:Source', record)
_set(context, serviceobj, 'pycsw:Format', md.identification.type)
for c in md.contents:
if md.contents[c].parent is None:
bbox = md.contents[c].boundingBoxWGS84
tmp = '%s,%s,%s,%s' % (bbox[0], bbox[1], bbox[2], bbox[3])
_set(context, serviceobj, 'pycsw:BoundingBox', util.bbox2wktpolygon(tmp))
break
_set(context, serviceobj, 'pycsw:CRS', 'urn:ogc:def:crs:EPSG:6.11:4326')
_set(context, serviceobj, 'pycsw:DistanceUOM', 'degrees')
_set(context, serviceobj, 'pycsw:ServiceType', md.identification.type)
_set(context, serviceobj, 'pycsw:ServiceTypeVersion', md.identification.version)
_set(context, serviceobj, 'pycsw:Operation', ','.join([d.name for d in md.operations]))
_set(context, serviceobj, 'pycsw:OperatesOn', ','.join(list(md.contents)))
_set(context, serviceobj, 'pycsw:CouplingType', 'tight')
links = [
'%s,OGC-WMS Web Map Service,OGC:WMS,%s' % (identifier, md.url),
]
_set(context, serviceobj, 'pycsw:Links', '^'.join(links))
recobjs.append(serviceobj)
# generate record foreach layer
LOGGER.debug('Harvesting %d WMS layers' % len(md.contents))
for layer in md.contents:
recobj = repos.dataset()
identifier2 = '%s-%s' % (identifier, md.contents[layer].name)
_set(context, recobj, 'pycsw:Identifier', identifier2)
_set(context, recobj, 'pycsw:Typename', 'csw:Record')
_set(context, recobj, 'pycsw:Schema', 'http://www.opengis.net/wms')
_set(context, recobj, 'pycsw:MdSource', record)
_set(context, recobj, 'pycsw:InsertDate', util.get_today_and_now())
_set(context, recobj, 'pycsw:XML', md.getServiceXML())
_set(context, recobj, 'pycsw:Type', 'dataset')
_set(context, recobj, 'pycsw:ParentIdentifier', identifier)
_set(context, recobj, 'pycsw:Title', md.contents[layer].title)
_set(context, recobj, 'pycsw:Abstract', md.contents[layer].abstract)
_set(context, recobj, 'pycsw:Keywords', ','.join(md.contents[layer].keywords))
_set(context, recobj, 'pycsw:AnyText',
util.get_anytext([md.contents[layer].title,
md.contents[layer].abstract,
','.join(md.contents[layer].keywords)]))
bbox = md.contents[layer].boundingBoxWGS84
if bbox is not None:
tmp = '%s,%s,%s,%s' % (bbox[0], bbox[1], bbox[2], bbox[3])
_set(context, recobj, 'pycsw:BoundingBox', util.bbox2wktpolygon(tmp))
_set(context, recobj, 'pycsw:CRS', 'urn:ogc:def:crs:EPSG:6.11:4326')
_set(context, recobj, 'pycsw:DistanceUOM', 'degrees')
else:
bbox = md.contents[layer].boundingBox
if bbox:
tmp = '%s,%s,%s,%s' % (bbox[0], bbox[1], bbox[2], bbox[3])
_set(context, recobj, 'pycsw:BoundingBox', util.bbox2wktpolygon(tmp))
_set(context, recobj, 'pycsw:CRS', 'urn:ogc:def:crs:EPSG:6.11:%s' % \
bbox[-1].split(':')[1])
params = {
'service': 'WMS',
'version': '1.1.1',
'request': 'GetMap',
'layers': md.contents[layer].name,
'format': 'image/png',
'height': '200',
'width': '200',
'srs': 'EPSG:4326',
'bbox': '%s,%s,%s,%s' % (bbox[0], bbox[1], bbox[2], bbox[3]),
'styles': ''
}
links = [
'%s,OGC-Web Map Service,OGC:WMS,%s' % (md.contents[layer].name, md.url),
'%s,Web image thumbnail (URL),WWW:LINK-1.0-http--image-thumbnail,%s' % (md.contents[layer].name, build_get_url(md.url, params))
]
_set(context, recobj, 'pycsw:Links', '^'.join(links))
recobjs.append(recobj)
return recobjs
def _parse_wfs(context, repos, record, identifier):
from owslib.wfs import WebFeatureService
bboxs = []
recobjs = []
serviceobj = repos.dataset()
md = WebFeatureService(record, '1.1.0')
# generate record of service instance
_set(context, serviceobj, 'pycsw:Identifier', identifier)
_set(context, serviceobj, 'pycsw:Typename', 'csw:Record')
_set(context, serviceobj, 'pycsw:Schema', 'http://www.opengis.net/wfs')
_set(context, serviceobj, 'pycsw:MdSource', record)
_set(context, serviceobj, 'pycsw:InsertDate', util.get_today_and_now())
_set(context, serviceobj, 'pycsw:XML', etree.tostring(md._capabilities))
_set(context, serviceobj, 'pycsw:AnyText', util.get_anytext(etree.tostring(md._capabilities)))
_set(context, serviceobj, 'pycsw:Type', 'service')
_set(context, serviceobj, 'pycsw:Title', md.identification.title)
_set(context, serviceobj, 'pycsw:Abstract', md.identification.abstract)
_set(context, serviceobj, 'pycsw:Keywords', ','.join(md.identification.keywords))
_set(context, serviceobj, 'pycsw:Creator', md.provider.contact.name)
_set(context, serviceobj, 'pycsw:Publisher', md.provider.name)
_set(context, serviceobj, 'pycsw:Contributor', md.provider.contact.name)
_set(context, serviceobj, 'pycsw:OrganizationName', md.provider.contact.name)
_set(context, serviceobj, 'pycsw:AccessConstraints', md.identification.accessconstraints)
_set(context, serviceobj, 'pycsw:OtherConstraints', md.identification.fees)
_set(context, serviceobj, 'pycsw:Source', record)
_set(context, serviceobj, 'pycsw:Format', md.identification.type)
_set(context, serviceobj, 'pycsw:CRS', 'urn:ogc:def:crs:EPSG:6.11:4326')
_set(context, serviceobj, 'pycsw:DistanceUOM', 'degrees')
_set(context, serviceobj, 'pycsw:ServiceType', md.identification.type)
_set(context, serviceobj, 'pycsw:ServiceTypeVersion', md.identification.version)
_set(context, serviceobj, 'pycsw:Operation', ','.join([d.name for d in md.operations]))
_set(context, serviceobj, 'pycsw:OperatesOn', ','.join(list(md.contents)))
_set(context, serviceobj, 'pycsw:CouplingType', 'tight')
links = [
'%s,OGC-WFS Web Feature Service,OGC:WFS,%s' % (identifier, md.url)
]
_set(context, serviceobj, 'pycsw:Links', '^'.join(links))
# generate record foreach featuretype
LOGGER.debug('Harvesting %d WFS featuretypes' % len(md.contents))
for featuretype in md.contents:
recobj = repos.dataset()
identifier2 = '%s-%s' % (identifier, md.contents[featuretype].id)
_set(context, recobj, 'pycsw:Identifier', identifier2)
_set(context, recobj, 'pycsw:Typename', 'csw:Record')
_set(context, recobj, 'pycsw:Schema', 'http://www.opengis.net/wfs')
_set(context, recobj, 'pycsw:MdSource', record)
_set(context, recobj, 'pycsw:InsertDate', util.get_today_and_now())
_set(context, recobj, 'pycsw:XML', etree.tostring(md._capabilities))
_set(context, recobj, 'pycsw:Type', 'dataset')
_set(context, recobj, 'pycsw:ParentIdentifier', identifier)
_set(context, recobj, 'pycsw:Title', md.contents[featuretype].title)
_set(context, recobj, 'pycsw:Abstract', md.contents[featuretype].abstract)
_set(context, recobj, 'pycsw:Keywords', ','.join(md.contents[featuretype].keywords))
_set(context, recobj, 'pycsw:AnyText',
util.get_anytext([md.contents[featuretype].title,
md.contents[featuretype].abstract,
','.join(md.contents[featuretype].keywords)]))
bbox = md.contents[featuretype].boundingBoxWGS84
if bbox is not None:
tmp = '%s,%s,%s,%s' % (bbox[0], bbox[1], bbox[2], bbox[3])
wkt_polygon = util.bbox2wktpolygon(tmp)
_set(context, recobj, 'pycsw:BoundingBox', wkt_polygon)
_set(context, recobj, 'pycsw:CRS', 'urn:ogc:def:crs:EPSG:6.11:4326')
_set(context, recobj, 'pycsw:DistanceUOM', 'degrees')
bboxs.append(wkt_polygon)
params = {
'service': 'WFS',
'version': '1.1.0',
'request': 'GetFeature',
'typename': md.contents[featuretype].id,
}
links = [
'%s,OGC-Web Feature Service,OGC:WFS,%s' % (md.contents[featuretype].id, md.url),
'%s,File for download,WWW:DOWNLOAD-1.0-http--download,%s' % (md.contents[featuretype].id, build_get_url(md.url, params))
]
_set(context, recobj, 'pycsw:Links', '^'.join(links))
recobjs.append(recobj)
# Derive a bbox based on aggregated featuretype bbox values
bbox_agg = util.bbox_from_polygons(bboxs)
if bbox_agg is not None:
_set(context, serviceobj, 'pycsw:BoundingBox', bbox_agg)
recobjs.insert(0, serviceobj)
return recobjs
def _parse_wcs(context, repos, record, identifier):
from owslib.wcs import WebCoverageService
bboxs = []
recobjs = []
serviceobj = repos.dataset()
md = WebCoverageService(record, '1.0.0')
# generate record of service instance
_set(context, serviceobj, 'pycsw:Identifier', identifier)
_set(context, serviceobj, 'pycsw:Typename', 'csw:Record')
_set(context, serviceobj, 'pycsw:Schema', 'http://www.opengis.net/wcs')
_set(context, serviceobj, 'pycsw:MdSource', record)
_set(context, serviceobj, 'pycsw:InsertDate', util.get_today_and_now())
_set(context, serviceobj, 'pycsw:XML', etree.tostring(md._capabilities))
_set(context, serviceobj, 'pycsw:AnyText', util.get_anytext(etree.tostring(md._capabilities)))
_set(context, serviceobj, 'pycsw:Type', 'service')
_set(context, serviceobj, 'pycsw:Title', md.identification.title)
_set(context, serviceobj, 'pycsw:Abstract', md.identification.abstract)
_set(context, serviceobj, 'pycsw:Keywords', ','.join(md.identification.keywords))
_set(context, serviceobj, 'pycsw:Creator', md.provider.contact.name)
_set(context, serviceobj, 'pycsw:Publisher', md.provider.name)
_set(context, serviceobj, 'pycsw:Contributor', md.provider.contact.name)
_set(context, serviceobj, 'pycsw:OrganizationName', md.provider.contact.name)
_set(context, serviceobj, 'pycsw:AccessConstraints', md.identification.accessConstraints)
_set(context, serviceobj, 'pycsw:OtherConstraints', md.identification.fees)
_set(context, serviceobj, 'pycsw:Source', record)
_set(context, serviceobj, 'pycsw:Format', md.identification.type)
_set(context, serviceobj, 'pycsw:CRS', 'urn:ogc:def:crs:EPSG:6.11:4326')
_set(context, serviceobj, 'pycsw:DistanceUOM', 'degrees')
_set(context, serviceobj, 'pycsw:ServiceType', md.identification.type)
_set(context, serviceobj, 'pycsw:ServiceTypeVersion', md.identification.version)
_set(context, serviceobj, 'pycsw:Operation', ','.join([d.name for d in md.operations]))
_set(context, serviceobj, 'pycsw:OperatesOn', ','.join(list(md.contents)))
_set(context, serviceobj, 'pycsw:CouplingType', 'tight')
links = [
'%s,OGC-WCS Web Coverage Service,OGC:WCS,%s' % (identifier, md.url)
]
_set(context, serviceobj, 'pycsw:Links', '^'.join(links))
# generate record foreach coverage
LOGGER.debug('Harvesting %d WCS coverages ' % len(md.contents))
for coverage in md.contents:
recobj = repos.dataset()
identifier2 = '%s-%s' % (identifier, md.contents[coverage].id)
_set(context, recobj, 'pycsw:Identifier', identifier2)
_set(context, recobj, 'pycsw:Typename', 'csw:Record')
_set(context, recobj, 'pycsw:Schema', 'http://www.opengis.net/wcs')
_set(context, recobj, 'pycsw:MdSource', record)
_set(context, recobj, 'pycsw:InsertDate', util.get_today_and_now())
_set(context, recobj, 'pycsw:XML', etree.tostring(md._capabilities))
_set(context, recobj, 'pycsw:Type', 'dataset')
_set(context, recobj, 'pycsw:ParentIdentifier', identifier)
_set(context, recobj, 'pycsw:Title', md.contents[coverage].title)
_set(context, recobj, 'pycsw:Abstract', md.contents[coverage].abstract)
_set(context, recobj, 'pycsw:Keywords', ','.join(md.contents[coverage].keywords))
_set(context, recobj, 'pycsw:AnyText',
util.get_anytext([md.contents[coverage].title,
md.contents[coverage].abstract,
','.join(md.contents[coverage].keywords)]))
bbox = md.contents[coverage].boundingBoxWGS84
if bbox is not None:
tmp = '%s,%s,%s,%s' % (bbox[0], bbox[1], bbox[2], bbox[3])
wkt_polygon = util.bbox2wktpolygon(tmp)
_set(context, recobj, 'pycsw:BoundingBox', wkt_polygon)
_set(context, recobj, 'pycsw:CRS', 'urn:ogc:def:crs:EPSG:6.11:4326')
_set(context, recobj, 'pycsw:DistanceUOM', 'degrees')
bboxs.append(wkt_polygon)
links = [
'%s,OGC-Web Coverage Service,OGC:WCS,%s' % (md.contents[coverage].id, md.url)
]
_set(context, recobj, 'pycsw:Links', '^'.join(links))
recobjs.append(recobj)
# Derive a bbox based on aggregated coverage bbox values
bbox_agg = util.bbox_from_polygons(bboxs)
if bbox_agg is not None:
_set(context, serviceobj, 'pycsw:BoundingBox', bbox_agg)
recobjs.insert(0, serviceobj)
return recobjs
def _parse_wps(context, repos, record, identifier):
from owslib.wps import WebProcessingService
serviceobj = repos.dataset()
md = WebProcessingService(record)
# generate record of service instance
_set(context, serviceobj, 'pycsw:Identifier', identifier)
_set(context, serviceobj, 'pycsw:Typename', 'csw:Record')
_set(context, serviceobj, 'pycsw:Schema', 'http://www.opengis.net/wps/1.0.0')
_set(context, serviceobj, 'pycsw:MdSource', record)
_set(context, serviceobj, 'pycsw:InsertDate', util.get_today_and_now())
_set(context, serviceobj, 'pycsw:XML', etree.tostring(md._capabilities))
_set(context, serviceobj, 'pycsw:AnyText', util.get_anytext(md._capabilities))
_set(context, serviceobj, 'pycsw:Type', 'service')
_set(context, serviceobj, 'pycsw:Title', md.identification.title)
_set(context, serviceobj, 'pycsw:Abstract', md.identification.abstract)
_set(context, serviceobj, 'pycsw:Keywords', ','.join(md.identification.keywords))
_set(context, serviceobj, 'pycsw:Creator', md.provider.contact.name)
_set(context, serviceobj, 'pycsw:Publisher', md.provider.name)
_set(context, serviceobj, 'pycsw:Contributor', md.provider.contact.name)
_set(context, serviceobj, 'pycsw:OrganizationName', md.provider.contact.name)
_set(context, serviceobj, 'pycsw:AccessConstraints', md.identification.accessconstraints)
_set(context, serviceobj, 'pycsw:OtherConstraints', md.identification.fees)
_set(context, serviceobj, 'pycsw:Source', record)
_set(context, serviceobj, 'pycsw:Format', md.identification.type)
_set(context, serviceobj, 'pycsw:ServiceType', md.identification.type)
_set(context, serviceobj, 'pycsw:ServiceTypeVersion', md.identification.version)
_set(context, serviceobj, 'pycsw:Operation', ','.join([d.name for d in md.operations]))
_set(context, serviceobj, 'pycsw:OperatesOn', ','.join([o.identifier for o in md.processes]))
_set(context, serviceobj, 'pycsw:CouplingType', 'loose')
links = [
'%s,OGC-WPS Web Processing Service,OGC:WPS,%s' % (identifier, md.url),
'%s,OGC-WPS Capabilities service (ver 1.0.0),OGC:WPS-1.1.0-http-get-capabilities,%s' % (identifier, build_get_url(md.url, {'service': 'WPS', 'version': '1.0.0', 'request': 'GetCapabilities'})),
]
_set(context, serviceobj, 'pycsw:Links', '^'.join(links))
return serviceobj
def _parse_sos(context, repos, record, identifier, version):
from owslib.sos import SensorObservationService
bboxs = []
recobjs = []
serviceobj = repos.dataset()
if version == '1.0.0':
schema = 'http://www.opengis.net/sos/1.0'
else:
schema = 'http://www.opengis.net/sos/2.0'
md = SensorObservationService(record, version=version)
# generate record of service instance
_set(context, serviceobj, 'pycsw:Identifier', identifier)
_set(context, serviceobj, 'pycsw:Typename', 'csw:Record')
_set(context, serviceobj, 'pycsw:Schema', schema)
_set(context, serviceobj, 'pycsw:MdSource', record)
_set(context, serviceobj, 'pycsw:InsertDate', util.get_today_and_now())
_set(context, serviceobj, 'pycsw:XML', etree.tostring(md._capabilities))
_set(context, serviceobj, 'pycsw:AnyText', util.get_anytext(etree.tostring(md._capabilities)))
_set(context, serviceobj, 'pycsw:Type', 'service')
_set(context, serviceobj, 'pycsw:Title', md.identification.title)
_set(context, serviceobj, 'pycsw:Abstract', md.identification.abstract)
_set(context, serviceobj, 'pycsw:Keywords', ','.join(md.identification.keywords))
_set(context, serviceobj, 'pycsw:Creator', md.provider.contact.name)
_set(context, serviceobj, 'pycsw:Publisher', md.provider.name)
_set(context, serviceobj, 'pycsw:Contributor', md.provider.contact.name)
_set(context, serviceobj, 'pycsw:OrganizationName', md.provider.contact.name)
_set(context, serviceobj, 'pycsw:AccessConstraints', md.identification.accessconstraints)
_set(context, serviceobj, 'pycsw:OtherConstraints', md.identification.fees)
_set(context, serviceobj, 'pycsw:Source', record)
_set(context, serviceobj, 'pycsw:Format', md.identification.type)
_set(context, serviceobj, 'pycsw:CRS', 'urn:ogc:def:crs:EPSG:6.11:4326')
_set(context, serviceobj, 'pycsw:DistanceUOM', 'degrees')
_set(context, serviceobj, 'pycsw:ServiceType', md.identification.type)
_set(context, serviceobj, 'pycsw:ServiceTypeVersion', md.identification.version)
_set(context, serviceobj, 'pycsw:Operation', ','.join([d.name for d in md.operations]))
_set(context, serviceobj, 'pycsw:OperatesOn', ','.join(list(md.contents)))
_set(context, serviceobj, 'pycsw:CouplingType', 'tight')
links = [
'%s,OGC-SOS Sensor Observation Service,OGC:SOS,%s' % (identifier, md.url),
]
_set(context, serviceobj, 'pycsw:Links', '^'.join(links))
# generate record foreach offering
LOGGER.debug('Harvesting %d SOS ObservationOffering\'s ', len(md.contents))
for offering in md.contents:
recobj = repos.dataset()
identifier2 = '%s-%s' % (identifier, md.contents[offering].id)
_set(context, recobj, 'pycsw:Identifier', identifier2)
_set(context, recobj, 'pycsw:Typename', 'csw:Record')
_set(context, recobj, 'pycsw:Schema', schema)
_set(context, recobj, 'pycsw:MdSource', record)
_set(context, recobj, 'pycsw:InsertDate', util.get_today_and_now())
_set(context, recobj, 'pycsw:XML', etree.tostring(md._capabilities))
_set(context, recobj, 'pycsw:Type', 'dataset')
_set(context, recobj, 'pycsw:ParentIdentifier', identifier)
_set(context, recobj, 'pycsw:Title', md.contents[offering].description)
_set(context, recobj, 'pycsw:Abstract', md.contents[offering].description)
_set(context, recobj, 'pycsw:TempExtent_begin', util.datetime2iso8601(md.contents[offering].begin_position))
_set(context, recobj, 'pycsw:TempExtent_end', util.datetime2iso8601(md.contents[offering].end_position))
_set(context, recobj, 'pycsw:AnyText',
util.get_anytext([md.contents[offering].description]))
bbox = md.contents[offering].bbox
if bbox is not None:
tmp = '%s,%s,%s,%s' % (bbox[0], bbox[1], bbox[2], bbox[3])
wkt_polygon = util.bbox2wktpolygon(tmp)
_set(context, recobj, 'pycsw:BoundingBox', wkt_polygon)
_set(context, recobj, 'pycsw:CRS', md.contents[offering].bbox_srs.id)
_set(context, recobj, 'pycsw:DistanceUOM', 'degrees')
bboxs.append(wkt_polygon)
recobjs.append(recobj)
# Derive a bbox based on aggregated featuretype bbox values
bbox_agg = util.bbox_from_polygons(bboxs)
if bbox_agg is not None:
_set(context, serviceobj, 'pycsw:BoundingBox', bbox_agg)
recobjs.insert(0, serviceobj)
return recobjs
def _parse_fgdc(context, repos, exml):
from owslib.fgdc import Metadata
recobj = repos.dataset()
links = []
md = Metadata(exml)
if md.idinfo.datasetid is not None: # we need an identifier
_set(context, recobj, 'pycsw:Identifier', md.idinfo.datasetid)
else: # generate one ourselves
_set(context, recobj, 'pycsw:Identifier', uuid.uuid1().get_urn())
_set(context, recobj, 'pycsw:Typename', 'fgdc:metadata')
_set(context, recobj, 'pycsw:Schema', context.namespaces['fgdc'])
_set(context, recobj, 'pycsw:MdSource', 'local')
_set(context, recobj, 'pycsw:InsertDate', util.get_today_and_now())
_set(context, recobj, 'pycsw:XML', md.xml)
_set(context, recobj, 'pycsw:AnyText', util.get_anytext(exml))
_set(context, recobj, 'pycsw:Language', 'en-US')
if hasattr(md.idinfo, 'descript'):
_set(context, recobj, 'pycsw:Abstract', md.idinfo.descript.abstract)
if hasattr(md.idinfo, 'keywords'):
if md.idinfo.keywords.theme:
_set(context, recobj, 'pycsw:Keywords', \
','.join(md.idinfo.keywords.theme[0]['themekey']))
if hasattr(md.idinfo.timeperd, 'timeinfo'):
if hasattr(md.idinfo.timeperd.timeinfo, 'rngdates'):
_set(context, recobj, 'pycsw:TempExtent_begin',
md.idinfo.timeperd.timeinfo.rngdates.begdate)
_set(context, recobj, 'pycsw:TempExtent_end',
md.idinfo.timeperd.timeinfo.rngdates.enddate)
if hasattr(md.idinfo, 'origin'):
_set(context, recobj, 'pycsw:Creator', md.idinfo.origin)
_set(context, recobj, 'pycsw:Publisher', md.idinfo.origin)
_set(context, recobj, 'pycsw:Contributor', md.idinfo.origin)
if hasattr(md.idinfo, 'ptcontac'):
_set(context, recobj, 'pycsw:OrganizationName', md.idinfo.ptcontac.cntorg)
_set(context, recobj, 'pycsw:AccessConstraints', md.idinfo.accconst)
_set(context, recobj, 'pycsw:OtherConstraints', md.idinfo.useconst)
_set(context, recobj, 'pycsw:Date', md.metainfo.metd)
if hasattr(md.idinfo, 'spdom') and hasattr(md.idinfo.spdom, 'bbox'):
bbox = md.idinfo.spdom.bbox
else:
bbox = None
if hasattr(md.idinfo, 'citation'):
if hasattr(md.idinfo.citation, 'citeinfo'):
_set(context, recobj, 'pycsw:Type', md.idinfo.citation.citeinfo['geoform'])
_set(context, recobj, 'pycsw:Title', md.idinfo.citation.citeinfo['title'])
_set(context, recobj,
'pycsw:PublicationDate', md.idinfo.citation.citeinfo['pubdate'])
_set(context, recobj, 'pycsw:Format', md.idinfo.citation.citeinfo['geoform'])
if md.idinfo.citation.citeinfo['onlink']:
for link in md.idinfo.citation.citeinfo['onlink']:
tmp = ',,,%s' % link
links.append(tmp)
if hasattr(md, 'distinfo') and hasattr(md.distinfo, 'stdorder'):
for link in md.distinfo.stdorder['digform']:
tmp = ',%s,,%s' % (link['name'], link['url'])
links.append(tmp)
if len(links) > 0:
_set(context, recobj, 'pycsw:Links', '^'.join(links))
if bbox is not None:
try:
tmp = '%s,%s,%s,%s' % (bbox.minx, bbox.miny, bbox.maxx, bbox.maxy)
_set(context, recobj, 'pycsw:BoundingBox', util.bbox2wktpolygon(tmp))
except: # coordinates are corrupted, do not include
_set(context, recobj, 'pycsw:BoundingBox', None)
else:
_set(context, recobj, 'pycsw:BoundingBox', None)
return recobj
def _parse_iso(context, repos, exml):
from owslib.iso import MD_Metadata
recobj = repos.dataset()
links = []
md = MD_Metadata(exml)
_set(context, recobj, 'pycsw:Identifier', md.identifier)
_set(context, recobj, 'pycsw:Typename', 'gmd:MD_Metadata')
_set(context, recobj, 'pycsw:Schema', context.namespaces['gmd'])
_set(context, recobj, 'pycsw:MdSource', 'local')
_set(context, recobj, 'pycsw:InsertDate', util.get_today_and_now())
_set(context, recobj, 'pycsw:XML', md.xml)
_set(context, recobj, 'pycsw:AnyText', util.get_anytext(exml))
_set(context, recobj, 'pycsw:Language', md.language)
_set(context, recobj, 'pycsw:Type', md.hierarchy)
_set(context, recobj, 'pycsw:ParentIdentifier', md.parentidentifier)
_set(context, recobj, 'pycsw:Date', md.datestamp)
_set(context, recobj, 'pycsw:Modified', md.datestamp)
_set(context, recobj, 'pycsw:Source', md.dataseturi)
if md.referencesystem is not None:
_set(context, recobj, 'pycsw:CRS','urn:ogc:def:crs:EPSG:6.11:%s' %
md.referencesystem.code)
if hasattr(md, 'identification'):
_set(context, recobj, 'pycsw:Title', md.identification.title)
_set(context, recobj, 'pycsw:AlternateTitle', md.identification.alternatetitle)
_set(context, recobj, 'pycsw:Abstract', md.identification.abstract)
_set(context, recobj, 'pycsw:Relation', md.identification.aggregationinfo)
if hasattr(md.identification, 'temporalextent_start'):
_set(context, recobj, 'pycsw:TempExtent_begin', md.identification.temporalextent_start)
if hasattr(md.identification, 'temporalextent_end'):
_set(context, recobj, 'pycsw:TempExtent_end', md.identification.temporalextent_end)
if len(md.identification.topiccategory) > 0:
_set(context, recobj, 'pycsw:TopicCategory', md.identification.topiccategory[0])
if len(md.identification.resourcelanguage) > 0:
_set(context, recobj, 'pycsw:ResourceLanguage', md.identification.resourcelanguage[0])
if hasattr(md.identification, 'bbox'):
bbox = md.identification.bbox
else:
bbox = None
if (hasattr(md.identification, 'keywords') and
len(md.identification.keywords) > 0):
all_keywords = [item for sublist in md.identification.keywords for item in sublist['keywords'] if item is not None]
_set(context, recobj, 'pycsw:Keywords', ','.join(all_keywords))
_set(context, recobj, 'pycsw:KeywordType', md.identification.keywords[0]['type'])
if hasattr(md.identification, 'creator'):
_set(context, recobj, 'pycsw:Creator', md.identification.creator)
if hasattr(md.identification, 'publisher'):
_set(context, recobj, 'pycsw:Publisher', md.identification.publisher)
if hasattr(md.identification, 'contributor'):
_set(context, recobj, 'pycsw:Contributor', md.identification.contributor)
if (hasattr(md.identification, 'contact') and
hasattr(md.identification.contact, 'organization')):
_set(context, recobj, 'pycsw:OrganizationName', md.identification.contact.organization)
if len(md.identification.securityconstraints) > 0:
_set(context, recobj, 'pycsw:SecurityConstraints',
md.identification.securityconstraints[0])
if len(md.identification.accessconstraints) > 0:
_set(context, recobj, 'pycsw:AccessConstraints',
md.identification.accessconstraints[0])
if len(md.identification.otherconstraints) > 0:
_set(context, recobj, 'pycsw:OtherConstraints', md.identification.otherconstraints[0])
if hasattr(md.identification, 'date'):
for datenode in md.identification.date:
if datenode.type == 'revision':
_set(context, recobj, 'pycsw:RevisionDate', datenode.date)
elif datenode.type == 'creation':
_set(context, recobj, 'pycsw:CreationDate', datenode.date)
elif datenode.type == 'publication':
_set(context, recobj, 'pycsw:PublicationDate', datenode.date)
if hasattr(md.identification, 'extent') and hasattr(md.identification.extent, 'description_code'):
_set(context, recobj, 'pycsw:GeographicDescriptionCode', md.identification.extent.description_code)
if len(md.identification.denominators) > 0:
_set(context, recobj, 'pycsw:Denominator', md.identification.denominators[0])
if len(md.identification.distance) > 0:
_set(context, recobj, 'pycsw:DistanceValue', md.identification.distance[0])
if len(md.identification.uom) > 0:
_set(context, recobj, 'pycsw:DistanceUOM', md.identification.uom[0])
if len(md.identification.classification) > 0:
_set(context, recobj, 'pycsw:Classification', md.identification.classification[0])
if len(md.identification.uselimitation) > 0:
_set(context, recobj, 'pycsw:ConditionApplyingToAccessAndUse',
md.identification.uselimitation[0])
if hasattr(md.identification, 'format'):
_set(context, recobj, 'pycsw:Format', md.distribution.format)
if md.serviceidentification is not None:
_set(context, recobj, 'pycsw:ServiceType', md.serviceidentification.type)
_set(context, recobj, 'pycsw:ServiceTypeVersion', md.serviceidentification.version)
_set(context, recobj, 'pycsw:CouplingType', md.serviceidentification.couplingtype)
#if len(md.serviceidentification.operateson) > 0:
# _set(context, recobj, 'pycsw:operateson = VARCHAR(32),
#_set(context, recobj, 'pycsw:operation VARCHAR(32),
#_set(context, recobj, 'pycsw:operatesonidentifier VARCHAR(32),
#_set(context, recobj, 'pycsw:operatesoname VARCHAR(32),
if hasattr(md.identification, 'dataquality'):
_set(context, recobj, 'pycsw:Degree', md.dataquality.conformancedegree)
_set(context, recobj, 'pycsw:Lineage', md.dataquality.lineage)
_set(context, recobj, 'pycsw:SpecificationTitle', md.dataquality.specificationtitle)
if hasattr(md.dataquality, 'specificationdate'):
_set(context, recobj, 'pycsw:specificationDate',
md.dataquality.specificationdate[0].date)
_set(context, recobj, 'pycsw:SpecificationDateType',
md.dataquality.specificationdate[0].datetype)
if hasattr(md, 'contact') and len(md.contact) > 0:
_set(context, recobj, 'pycsw:ResponsiblePartyRole', md.contact[0].role)
LOGGER.info('Scanning for links')
if hasattr(md, 'distribution'):
dist_links = []
if hasattr(md.distribution, 'online'):
LOGGER.debug('Scanning for gmd:transferOptions element(s)')
dist_links.extend(md.distribution.online)
if hasattr(md.distribution, 'distributor'):
LOGGER.debug('Scanning for gmd:distributorTransferOptions element(s)')
for dist_member in md.distribution.distributor:
dist_links.extend(dist_member.online)
for link in dist_links:
linkstr = '%s,%s,%s,%s' % \
(link.name, link.description, link.protocol, link.url)
links.append(linkstr)
try:
LOGGER.debug('Scanning for srv:SV_ServiceIdentification links')
for sident in md.identificationinfo:
if hasattr(sident, 'operations'):
for sops in sident.operations:
for scpt in sops['connectpoint']:
LOGGER.debug('adding srv link %s', scpt.url)
linkstr = '%s,%s,%s,%s' % \
(scpt.name, scpt.description, scpt.protocol, scpt.url)
links.append(linkstr)
except Exception, err: # srv: identification does not exist
LOGGER.debug('no srv:SV_ServiceIdentification links found')
if len(links) > 0:
_set(context, recobj, 'pycsw:Links', '^'.join(links))
if bbox is not None:
try:
tmp = '%s,%s,%s,%s' % (bbox.minx, bbox.miny, bbox.maxx, bbox.maxy)
_set(context, recobj, 'pycsw:BoundingBox', util.bbox2wktpolygon(tmp))
except: # coordinates are corrupted, do not include
_set(context, recobj, 'pycsw:BoundingBox', None)
else:
_set(context, recobj, 'pycsw:BoundingBox', None)
return recobj
def _parse_dc(context, repos, exml):
from owslib.csw import CswRecord
recobj = repos.dataset()
links = []
md = CswRecord(exml)
if md.bbox is None:
bbox = None
else:
bbox = md.bbox
_set(context, recobj, 'pycsw:Identifier', md.identifier)
_set(context, recobj, 'pycsw:Typename', 'csw:Record')
_set(context, recobj, 'pycsw:Schema', context.namespaces['csw'])
_set(context, recobj, 'pycsw:MdSource', 'local')
_set(context, recobj, 'pycsw:InsertDate', util.get_today_and_now())
_set(context, recobj, 'pycsw:XML', md.xml)
_set(context, recobj, 'pycsw:AnyText', util.get_anytext(exml))
_set(context, recobj, 'pycsw:Language', md.language)
_set(context, recobj, 'pycsw:Type', md.type)
_set(context, recobj, 'pycsw:Title', md.title)
_set(context, recobj, 'pycsw:AlternateTitle', md.alternative)
_set(context, recobj, 'pycsw:Abstract', md.abstract)
if len(md.subjects) > 0 and None not in md.subjects:
_set(context, recobj, 'pycsw:Keywords', ','.join(md.subjects))