Source code for GeoHealthCheck.plugins.probe.wfs

from GeoHealthCheck.probe import Probe
from GeoHealthCheck.plugin import Plugin
from GeoHealthCheck.util import transform_bbox
from owslib.wfs import WebFeatureService

[docs]class WfsGetFeatureBbox(Probe): """ do WFS GetFeature in BBOX """ NAME = "WFS GetFeature in BBOX for SINGLE FeatureType" DESCRIPTION = """ WFS GetFeature in BBOX for SINGLE FeatureType. """ RESOURCE_TYPE = 'OGC:WFS' REQUEST_METHOD = 'POST' REQUEST_HEADERS = { 'content-type': 'text/xml;charset=UTF-8' } REQUEST_TEMPLATE = """<wfs:GetFeature xmlns:wfs="" service="WFS" version="1.1.0" outputFormat="text/xml; subtype=gml/3.1.1" xsi:schemaLocation="" xmlns:xsi=""> <wfs:Query typeName="{type_name}" srsName="{srs}" xmlns:{type_ns_prefix}="{type_ns_uri}"> <ogc:Filter xmlns:ogc=""> <ogc:BBOX> <gml:Envelope xmlns:gml="" srsName="{srs}"> <gml:lowerCorner>{bbox[0]} {bbox[1]}</gml:lowerCorner> <gml:upperCorner>{bbox[2]} {bbox[3]}</gml:upperCorner> </gml:Envelope> </ogc:BBOX> </ogc:Filter> </wfs:Query> </wfs:GetFeature> """ PARAM_DEFS = { 'type_name': { 'type': 'string', 'description': 'The WFS FeatureType name', 'default': None, 'required': True, 'range': None }, 'type_ns_prefix': { 'type': 'string', 'description': 'The WFS FeatureType namespace prefix', 'default': None, 'required': True, 'range': None }, 'type_ns_uri': { 'type': 'string', 'description': 'The WFS FeatureType namespace URI', 'default': '0', 'required': True, 'range': None }, 'geom_property_name': { 'type': 'string', 'description': 'Name of the geometry property within FeatureType', 'default': None, 'required': True, 'value': 'Not Required', 'range': None }, 'srs': { 'type': 'string', 'description': 'The SRS as EPSG: code', 'default': 'EPSG:4326', 'required': True, 'range': None }, 'bbox': { 'type': 'bbox', 'description': 'The tile image extension', 'default': ['-180', '-90', '180', '90'], 'required': True, 'range': None } } """Param defs""" CHECKS_AVAIL = { 'GeoHealthCheck.plugins.check.checks.XmlParse': { 'default': True }, 'GeoHealthCheck.plugins.check.checks.NotContainsOwsException': { 'default': True }, 'GeoHealthCheck.plugins.check.checks.ContainsStrings': { 'default': True, 'set_params': { 'strings': { 'name': 'Must contain FeatureCollection Element', 'description': """ Has FeatureCollection element in response doc """, 'value': ['FeatureCollection'] } } } } """ Checks for WFS GetFeature Response available. Optionally override Check PARAM_DEFS using set_params e.g. with specific `value` or even `name`. """ def __init__(self): Probe.__init__(self) self.layer_count = 0
[docs] def get_metadata(self, resource, version='1.1.0'): """ Get metadata, specific per Resource type. :param resource: :param version: :return: Metadata object """ return WebFeatureService(resource.url, version=version)
# Overridden: expand param-ranges from WFS metadata
[docs] def expand_params(self, resource): # Use WFS Capabilities doc to get metadata for # PARAM_DEFS ranges/defaults try: wfs = self.get_metadata_cached(resource, version='1.1.0') feature_types = wfs.contents feature_type_names = list(feature_types.keys()) self.layer_count = len(feature_type_names) ft_namespaces = set([name.split(':')[0] if ':' in name else None for name in feature_type_names]) ft_namespaces = filter(None, list(ft_namespaces)) # In some cases default NS is used: no FT NSs nsmap = None if len(ft_namespaces) > 0: try: # issue #243 this depends if lxml etree present # and used by OWSLib ! Otherwise fall-back. nsmap = wfs._capabilities.nsmap except Exception as err: # Fall-back pass if not nsmap: # Just build dummy NS map, to satisfy REQUEST_TEMPLATE ft_namespaces = ['dummyns'] nsmap = {ft_namespaces[0]: 'http://dummy.ns/'} self.PARAM_DEFS['type_ns_prefix']['value'] = ft_namespaces[0] self.PARAM_DEFS['type_ns_uri']['value'] = \ nsmap[ft_namespaces[0]] # FeatureTypes to select self.PARAM_DEFS['type_name']['range'] = feature_type_names self.PARAM_DEFS['type_ns_prefix']['range'] = ft_namespaces self.PARAM_DEFS['type_ns_uri']['range'] = \ [nsmap[ns] for ns in ft_namespaces] # Image Format # for oper in wfs.operations: # if == 'GetFeature': # self.PARAM_DEFS['format']['range'] = \ # oper.formatOptions # break # Take random feature_type to determine generic attrs for feature_type_name in feature_types: feature_type_entry = feature_types[feature_type_name] break # SRS crs_list = feature_type_entry.crsOptions srs_range = ['EPSG:%s' % crs.code for crs in crs_list] self.PARAM_DEFS['srs']['range'] = srs_range default_srs = srs_range[0] self.PARAM_DEFS['srs']['default'] = default_srs # bbox as list: 0-3 is bbox llx, lly, ulx, uly bbox = feature_type_entry.boundingBoxWGS84 # It looks like the first SRS is the default # if it is not EPSG:4326 we need to transform bbox if default_srs != 'EPSG:4326': bbox = transform_bbox('EPSG:4326', srs_range[0], bbox) # Convert bbox floats to str self.PARAM_DEFS['bbox']['default'] = \ [str(f) for f in bbox] # self.PARAM_DEFS['exceptions']['range'] = wfs.exceptions except Exception as err: raise err
[docs]class WfsGetFeatureBboxAll(WfsGetFeatureBbox): """ Do WFS GetFeature for each FeatureType in WFS. """ NAME = "WFS GetFeature in BBOX for ALL FeatureTypes" DESCRIPTION = """ WFS GetFeature in BBOX for ALL FeatureTypes. """ # Copy all PARAM_DEFS from parent to have own instance PARAM_DEFS = Plugin.merge(WfsGetFeatureBbox.PARAM_DEFS, {}) def __init__(self): WfsGetFeatureBbox.__init__(self) self.wfs = None self.feature_types = None # Overridden: expand param-ranges from WFS metadata # from single-layer GetFeature parent Probe and set layers # fixed to *
[docs] def expand_params(self, resource): WfsGetFeatureBbox.expand_params(self, resource) val = 'all %d feature types' % self.layer_count self.PARAM_DEFS['type_name']['range'] = [val] self.PARAM_DEFS['type_name']['value'] = val self.PARAM_DEFS['type_name']['default'] = val
[docs] def before_request(self): """ Before request to service, overridden from base class""" # Get capabilities doc to get all layers try: self.wfs = self.get_metadata_cached(self._resource, version='1.1.0') self.feature_types = self.wfs.contents.keys() except Exception as err: self.result.set(False, str(err))
[docs] def perform_request(self): """ Perform actual request to service, overridden from base class""" if not self.feature_types: self.result.set(False, 'Found no WFS Feature Types') return self.result.start() results_failed_total = [] for feature_type in self.feature_types: self._parameters['type_name'] = feature_type # Let the templated parent perform Probe.perform_request(self) self.run_checks() # Only keep failed feature_type results # otherwise with 100s of FTs the report grows out of hand... results_failed = self.result.results_failed if len(results_failed) > 0: # We have a failed feature_type: add to result message for result in results_failed: result.message = 'feature_type %s: %s' % \ (feature_type, result.message) results_failed_total += results_failed self.result.results_failed = [] self.result.results = [] self.result.results_failed = results_failed_total