def describerecord(self, typename='csw:Record', format=outputformat):
"""
Construct and process DescribeRecord request
Parameters
----------
- typename: the typename to describe (default is 'csw:Record')
- format: the outputFormat (default is 'application/xml')
"""
# construct request
nsmap = {
'csw' : ns.get_namespace('csw'),
'xsi' : ns.get_namespace('xsi'),
}
node0 = setrootelement('csw:DescribeRecord', nsmap)
node0.set('outputFormat', format)
node0.set('schemaLanguage',ns.get_namespace('xs2'))
node0.set('service', self.service)
node0.set('version', self.version)
node0.set(nsp('xsi:schemaLocation'), schema_location)
etree.SubElement(node0, nsp('csw:TypeName')).text = typename
self.request = xml2string(etree.tostring(node0))
self._invoke()
def __init__(self, url, lang='en-US', version='2.0.2', timeout=10, skip_caps=False):
"""
Construct and process a GetCapabilities request
Parameters
----------
- url: the URL of the CSW
- lang: the language (default is 'en-US')
- version: version (default is '2.0.2')
- timeout: timeout in seconds
- skip_caps: whether to skip GetCapabilities processing on init (default is False)
"""
self.url = url
self.lang = lang
self.version = version
self.timeout = timeout
self.service = 'CSW'
self.exceptionreport = None
if not skip_caps: # process GetCapabilities
# construct request
nsmap = {
'csw' : ns.get_namespace('csw'),
'ows' : ns.get_versioned_namespace('ows',_ows_version),
'xsi' : ns.get_namespace('xsi'),
}
node0 = setrootelement('csw:GetCapabilities', nsmap)
node0.set('service', self.service)
node0.set(nsp('xsi:schemaLocation'), schema_location)
tmp = etree.SubElement(node0, nsp_ows('ows:AcceptVersions'))
etree.SubElement(tmp, nsp_ows('ows:Version')).text = self.version
tmp2 = etree.SubElement(node0, nsp_ows('ows:AcceptFormats'))
etree.SubElement(tmp2, nsp_ows('ows:OutputFormat')).text = outputformat
self.request = xml2string(etree.tostring(node0))
self._invoke()
if self.exceptionreport is None:
# ServiceIdentification
val = self._exml.find(nsp_ows('ows:ServiceIdentification'))
self.identification=ows.ServiceIdentification(val,ns.get_versioned_namespace('ows', _ows_version))
# ServiceProvider
val = self._exml.find(nsp_ows('ows:ServiceProvider'))
self.provider=ows.ServiceProvider(val)
# ServiceOperations metadata
op = self._exml.find(nsp_ows('ows:OperationsMetadata'))
self.operations = ows.OperationsMetadata(op, ns.get_versioned_namespace('ows', _ows_version)).operations
# FilterCapabilities
val = self._exml.find(nsp('ogc:Filter_Capabilities'))
self.filters=fes.FilterCapabilities(val)
def harvest(self, source, resourcetype, resourceformat=None, harvestinterval=None, responsehandler=None):
"""
Construct and process a Harvest request
Parameters
----------
- source: a URI to harvest
- resourcetype: namespace identifying the type of resource
- resourceformat: MIME type of the resource
- harvestinterval: frequency of harvesting, in ISO8601
- responsehandler: endpoint that CSW should responsd to with response
"""
# construct request
node0 = setrootelement('csw:Harvest')
node0.set('version', self.version)
node0.set('service', self.service)
node0.set(nsp('xsi:schemaLocation'), schema_location)
etree.SubElement(node0, nsp('csw:Source')).text = source
etree.SubElement(node0, nsp('csw:ResourceType')).text = resourcetype
if resourceformat is not None:
etree.SubElement(node0, nsp('csw:ResourceFormat')).text = resourceformat
if harvestinterval is not None:
etree.SubElement(node0, nsp('csw:HarvestInterval')).text = harvestinterval
if responsehandler is not None:
etree.SubElement(node0, nsp('csw:ResponseHandler')).text = responsehandler
self.request = xml2string(etree.tostring(node0))
self._invoke()
self.results = {}
if self.exceptionreport is None:
val = self._exml.find(nsp('csw:Acknowledgement'))
if testXMLValue(val) is not None:
ts = val.attrib.get('timeStamp')
self.timestamp = testXMLValue(ts, True)
id = val.find(nsp('csw:RequestId'))
self.id = testXMLValue(id)
else:
self._parsetransactionsummary()
self._parseinsertresult()
def getdomain(self, dname, dtype='parameter'):
"""
Construct and process a GetDomain request
Parameters
----------
- dname: the value of the Parameter or Property to query
- dtype: whether to query a parameter (parameter) or property (property)
"""
# construct request
dtypename = 'ParameterName'
nsmap = {
'csw' : ns.get_namespace('csw'),
'xsi' : ns.get_namespace('xsi'),
}
node0 = setrootelement('csw:GetDomain', nsmap)
node0.set('service', self.service)
node0.set('version', self.version)
node0.set(nsp('xsi:schemaLocation'), schema_location)
if dtype == 'property':
dtypename = 'PropertyName'
etree.SubElement(node0, nsp('csw:%s' % dtypename)).text = dname
self.request = xml2string(etree.tostring(node0))
self._invoke()
if self.exceptionreport is None:
self.results = {}
val = self._exml.find(nsp('csw:DomainValues')).attrib.get('type')
self.results['type'] = testXMLValue(val, True)
val = self._exml.find(nsp('csw:DomainValues/csw:%s' % dtypename))
self.results[dtype] = testXMLValue(val)
# get the list of values associated with the Domain
self.results['values'] = []
for f in self._exml.findall(nsp('csw:DomainValues/csw:ListOfValues/csw:Value')):
self.results['values'].append(testXMLValue(f))
def getrecordbyid(self, id=[], esn='full', outputschema=None, format=outputformat):
"""
Construct and process a GetRecordById request
Parameters
----------
- id: the list of Ids
- esn: the ElementSetName 'full', 'brief' or 'summary' (default is 'full')
- outputschema: the outputSchema (default is 'http://www.opengis.net/cat/csw/2.0.2')
- format: the outputFormat (default is 'application/xml')
"""
if outputschema is None:
outputschema = ns.get_namespace('csw')
nsmap = {
'csw' : ns.get_namespace('csw'),
'xsi' : ns.get_namespace('xsi')
}
# construct request
node0 = setrootelement('csw:GetRecordById', nsmap)
node0.set('outputFormat', format)
node0.set('outputSchema', outputschema)
node0.set('service', self.service)
node0.set('version', self.version)
node0.set(nsp('xsi:schemaLocation'), schema_location)
for i in id:
etree.SubElement(node0, nsp('csw:Id')).text = i
etree.SubElement(node0, nsp('csw:ElementSetName')).text = esn
self.request = xml2string(etree.tostring(node0))
self._invoke()
if self.exceptionreport is None:
self.results = {}
self.records = {}
self._parserecords(outputschema, esn)
def transaction(self, ttype=None, typename='csw:Record', record=None, propertyname=None, propertyvalue=None, bbox=None, keywords=[], cql=None, identifier=None):
"""
Construct and process a Transaction request
Parameters
----------
- ttype: the type of transaction 'insert, 'update', 'delete'
- typename: the typename to describe (default is 'csw:Record')
- record: the XML record to insert
- propertyname: the RecordProperty/PropertyName to Filter against
- propertyvalue: the RecordProperty Value to Filter against (for updates)
- bbox: the bounding box of the spatial query in the form [minx,miny,maxx,maxy]
- keywords: list of keywords
- cql: common query language text. Note this overrides bbox, qtype, keywords
- identifier: record identifier. Note this overrides bbox, qtype, keywords, cql
"""
# construct request
node0 = setrootelement('csw:Transaction')
node0.set('version', self.version)
node0.set('service', self.service)
node0.set(nsp('xsi:schemaLocation'), schema_location)
validtransactions = ['insert', 'update', 'delete']
if ttype not in validtransactions: # invalid transaction
raise RuntimeError, 'Invalid transaction \'%s\'.' % ttype
node1 = etree.SubElement(node0, nsp('csw:%s' % ttype.capitalize()))
if ttype != 'update':
node1.set('typeName', typename)
if ttype == 'insert':
if record is None:
raise RuntimeError, 'Nothing to insert.'
node1.append(etree.fromstring(record))
if ttype == 'update':
if record is not None:
node1.append(etree.fromstring(record))
else:
if propertyname is not None and propertyvalue is not None:
node2 = etree.SubElement(node1, nsp('csw:RecordProperty'))
etree.SubElement(node2, nsp('csw:Name')).text = propertyname
etree.SubElement(node2, nsp('csw:Value')).text = propertyvalue
self._setconstraint(node1, qtype, propertyname, keywords, bbox, cql, identifier)
if ttype == 'delete':
self._setconstraint(node1, None, propertyname, keywords, bbox, cql, identifier)
self.request = xml2string(etree.tostring(node0))
self._invoke()
self.results = {}
if self.exceptionreport is None:
self._parsetransactionsummary()
self._parseinsertresult()
def getrecords(self, qtype=None, keywords=[], typenames='csw:Record', propertyname='csw:AnyText', bbox=None, esn='summary', sortby=None, outputschema=None, format=outputformat, startposition=0, maxrecords=10, cql=None, xml=None):
"""
Construct and process a GetRecords request
Parameters
----------
- qtype: type of resource to query (i.e. service, dataset)
- keywords: list of keywords
- typenames: the typeNames to query against (default is csw:Record)
- propertyname: the PropertyName to Filter against
- bbox: the bounding box of the spatial query in the form [minx,miny,maxx,maxy]
- esn: the ElementSetName 'full', 'brief' or 'summary' (default is 'summary')
- sortby: property to sort results on (default is 'dc:title')
- outputschema: the outputSchema (default is 'http://www.opengis.net/cat/csw/2.0.2')
- format: the outputFormat (default is 'application/xml')
- startposition: requests a slice of the result set, starting at this position (default is 0)
- maxrecords: the maximum number of records to return. No records are returned if 0 (default is 10)
- cql: common query language text. Note this overrides bbox, qtype, keywords
- xml: raw XML request. Note this overrides all other options
"""
if outputschema is None:
outputschema = ns.get_namespace('csw')
if xml is not None:
self.request = xml
e=etree.fromstring(xml)
val = e.find(nsp('csw:Query/csw:ElementSetName'))
if val is not None:
esn = testXMLValue(val)
else:
# construct request
nsmap = {
'xsi' : ns.get_namespace('xsi'),
'ogc' : ns.get_namespace('ogc'),
'dif' : ns.get_namespace('dif'),
'ows' : ns.get_versioned_namespace('ows', _ows_version),
'fgdc': ns.get_namespace('fgdc'),
'gmd' : ns.get_namespace('gmd'),
'csw' : ns.get_namespace('csw')
}
node0 = setrootelement('csw:GetRecords', nsmap)
node0.set('outputSchema', outputschema)
node0.set('outputFormat', format)
node0.set('version', self.version)
node0.set('resultType', 'results')
node0.set('service', self.service)
if startposition > 0:
node0.set('startPosition', str(startposition))
node0.set('maxRecords', str(maxrecords))
node0.set(nsp('xsi:schemaLocation'), schema_location)
node1 = etree.SubElement(node0, nsp('csw:Query'))
node1.set('typeNames', typenames)
etree.SubElement(node1, nsp('csw:ElementSetName')).text = esn
self._setconstraint(node1, qtype, propertyname, keywords, bbox, cql)
if sortby is not None:
fes.setsortby(node1, sortby)
self.request = xml2string(etree.tostring(node0))
self._invoke()
if self.exceptionreport is None:
self.results = {}
# process search results attributes
val = self._exml.find(nsp('csw:SearchResults')).attrib.get('numberOfRecordsMatched')
self.results['matches'] = int(testXMLValue(val, True))
val = self._exml.find(nsp('csw:SearchResults')).attrib.get('numberOfRecordsReturned')
self.results['returned'] = int(testXMLValue(val, True))
val = self._exml.find(nsp('csw:SearchResults')).attrib.get('nextRecord')
self.results['nextrecord'] = int(testXMLValue(val, True))
# process list of matching records
self.records = {}
self._parserecords(outputschema, esn)
