def getEndpointServiceData(self, endpoint, forceRefresh):
"""Returns service data for an endpoint.
"""
log.debug("getEndpointData called for %s", endpoint['wmsurl'])
wmsUrl = self.makeProxiedUrl(endpoint['wmsurl'])
wmcDoc = self.wmsCapabilityCache.getWmsCapabilities(wmsUrl, forceRefresh)
dom = xml.dom.minidom.parseString(wmcDoc)
# Get the namespace URI for the document root element.
ns = dom.documentElement.namespaceURI
# Get the version the WMS server responded with.
wmsVersion = dom.documentElement.getAttribute('version')
service = xml_util.getSingleChildByNameNS(dom.documentElement, ns, 'Service')
if service == None:
return None
title = xml_util.getSingleChildTextByNameNS(service, ns, 'Title')
abstract = xml_util.getSingleChildTextByNameNS(service, ns, 'Abstract')
# Break internal references to facilitiate garbage collection.
dom.unlink()
return {
'version': wmsVersion,
'title': title,
'abstract': abstract
}
def populateFromLayerElement(self, ns, layerEl, commonData):
"""Populates a WmsLayer instance from a WMS capabilities Layer element
@param ns: namespace in capabilities document
@param layerEl: Layer element
@param commonData: dict of capabilities data that is not specific to the layer
"""
self.title = xml_util.getSingleChildTextByNameNS(layerEl, ns, 'Title')
self.name = xml_util.getSingleChildTextByNameNS(layerEl, ns, 'Name')
self.abstract = xml_util.getSingleChildTextByNameNS(layerEl, ns, 'Abstract')
self.getMapUrl = commonData['getMapUrl']
self.getCapabilitiesUrl = commonData['getCapabilitiesUrl']
self.getFeatureInfoUrl = commonData['getFeatureInfoUrl']
self.wmsVersion = commonData['wmsVersion']
self.getCoverageUrl = commonData['getCoverageUrl']
# Parse Dimension element into attributes and list of values.
# First look for pre-WMS 1.3.0 Extent elements.
extents = {}
for extentEl in xml_util.getChildrenByNameNS(layerEl, ns, 'Extent'):
name = extentEl.getAttribute('name')
extentData = extentEl.firstChild
if extentData != None:
extentStr = extentEl.firstChild.data.strip()
extentValues = extentStr.split(',')
extents[name] = extentValues
# Find the Dimension elements.
self.dimensions = []
for dimensionEl in xml_util.getChildrenByNameNS(layerEl, ns, 'Dimension'):
name = dimensionEl.getAttribute('name')
units = dimensionEl.getAttribute('units')
unitSymbol = dimensionEl.getAttribute('unitSymbol')
default = dimensionEl.getAttribute('default')
dimensionData = dimensionEl.firstChild
if dimensionData != None:
dimensionStr = dimensionEl.firstChild.data.strip()
dimensionValues = dimensionStr.split(',')
elif name in extents:
dimensionValues = extents[name]
else:
dimensionValues = None
if dimensionValues:
dimension = {
'name': name,
'units': units,
'unitSymbol': unitSymbol,
'default': default,
'dimensionValues': dimensionValues
}
self.dimensions.append(dimension)
# Parse Style element into list of values.
self.styles = []
for styleEl in xml_util.getChildrenByNameNS(layerEl, ns, 'Style'):
name = xml_util.getSingleChildTextByNameNS(styleEl, ns, 'Name')
title = xml_util.getSingleChildTextByNameNS(styleEl, ns, 'Title')
style = {
'name': name,
'title': title,
}
legendUrlEl = xml_util.getSingleChildByNameNS(styleEl, ns, 'LegendURL')
if legendUrlEl != None:
width = legendUrlEl.getAttribute('width')
height = legendUrlEl.getAttribute('height')
onlineResourceEl = xml_util.getSingleChildByNameNS(legendUrlEl, ns, 'OnlineResource')
legendURL = onlineResourceEl.getAttributeNS(XLINK_URI, 'href')
style['legendURL'] = {
'width': width,
'height': height,
'onlineResource': legendURL
}
self.styles.append(style)
self.getDisplayOptionsUrl = None
for metadataUrlEl in xml_util.getChildrenByNameNS(layerEl, ns, 'MetadataURL'):
metadataUrlType = metadataUrlEl.getAttribute('type')
if metadataUrlType and (metadataUrlType == 'display_options') :
if xml_util.getSingleChildTextByNameNS(metadataUrlEl, ns, 'Format') == 'application/json':
onlineResourceEl = xml_util.getSingleChildByNameNS(metadataUrlEl, ns, 'OnlineResource')
if onlineResourceEl:
self.getDisplayOptionsUrl = onlineResourceEl.getAttributeNS(XLINK_URI, 'href')