forked from warrieka/geopunt4Qgis
/
metadata.py
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/
metadata.py
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# -*- coding: utf-8 -*-
import urllib2, urllib, json, sys, os.path, datetime
import xml.etree.ElementTree as ET
class MDdata:
def __init__(self, metadataXML):
self.start = int( metadataXML.attrib["from"] )
self.to = int( metadataXML.attrib["to"] )
self.count = int( metadataXML[0].attrib["count"] )
self.records = []
mds = metadataXML.findall("metadata")
for md in mds:
record = {}
geonet = md.find('{http://www.fao.org/geonetwork}info')
if geonet.find('uuid').text != None:
record['uuid'] = geonet.find('uuid').text
else:
continue #records with no id are just wrong
if (md.find('title') != None) and (md.find('title').text != None):
record['title'] = md.find('title').text
else:
record['title'] = ''
if (md.find('abstract') != None) and (md.find('abstract').text != None):
record['abstract'] = md.find('abstract').text
else:
record['abstract'] = ''
if (md.find('geoBox') != None) and (md.find('geoBox').text != None):
record['geoBox'] = md.find('geoBox').text #[float(i) for i in md.find('geoBox').text.split('|') ]
else:
record['geoBox'] = ""
record['wms'] = self._findWMS( md )
record['wfs'] = self._findWFS( md )
record['download'] = self._findDownload( md )
self.records.append(record)
def _findWFS(self , node ):
links = "|".join( [ n.text for n in node.findall("link") ] )
links = links.split('|')
for n in range(1, len( links )):
if "OGC:WFS" in links[n].upper():
if "http" in links[n - 1]: #some wfs are store with relative path's, ignore those
return links[n - 1]
return ""
def _findWMS(self , node ):
links = "|".join( [ n.text for n in node.findall("link") ] )
links = links.split('|')
for n in range(1, len( links )):
if "OGC:WMS" in links[n].upper():
if "http" in links[n - 1]: #some wms are stored with relative path's, ignore those
return links[n - 1]
return ""
def _findDownload(self , node):
links = "|".join( [ n.text for n in node.findall("link") ] )
links = links.split('|')
for n in range(1, len( links )):
if "DOWNLOAD" in links[n].upper():
if "http" in links[n - 1]: #some files are stored with relative path's, ignore those
return links[n - 1]
return ""
class MDReader:
def __init__(self, timeout=15, proxyUrl="", port="" ):
self.timeout = timeout
self.geoNetworkUrl = "https://metadata.geopunt.be/zoekdienst/srv/dut"
self.dataTypes = [["Dataset", "dataset"],["Datasetserie","series"],
["Objectencatalogus","model"],["Service","service"]]
self.inspireServiceTypes = ["Discovery","Transformation","View","Other","Invoke"]
self.inspireannex = ["i","ii","iii"]
if (isinstance(proxyUrl, unicode) or isinstance(proxyUrl, str)) & proxyUrl.startswith("http://"):
netLoc = proxyUrl.strip() + ":" + port
proxy = urllib2.ProxyHandler({'http': netLoc ,'https': netLoc })
self.opener = urllib2.build_opener(proxy)
else:
self.opener = None
def _createFindUrl(self, q="", start=1, to=20, themekey='', orgName='', dataType='', siteId='', inspiretheme='', inspireannex='', inspireServiceType=''):
geopuntUrl = self.geoNetworkUrl + "/q?fast=index&sortBy=changeDate&"
data = {}
data["any"] = "*" + unicode(q).encode('utf-8') + "*"
data["to"] = to
data["from"] = start
if themekey:
if " " in themekey and not " or " in themekey.lower():
data["themekey"] = '"' + themekey.lower() + '"'
else:
data["themekey"] = themekey.lower()
if orgName and not " or " in orgName.lower():
if " " in orgName:
data["orgName"] = '"' + orgName.lower() + '"'
else:
data["orgName"] = orgName.lower()
if dataType: data['type']= dataType
if siteId: data['siteId']= siteId
if inspiretheme:
if " " in inspiretheme and not " or " in inspiretheme.lower():
data["inspiretheme"] = '"' + inspiretheme + '"'
else:
data["inspiretheme"] = inspiretheme
if inspireannex and (inspireannex.lower() in self.inspireannex ) :
data["inspireannex"] = inspireannex.lower()
if inspireServiceType :
data["serviceType"] = inspireServiceType.lower()
values = urllib.urlencode(data)
result = geopuntUrl + values
return result
def list_GDI_theme(self, q=''):
url = self.geoNetworkUrl + "/xml.search.keywords?pNewSearch=true&pTypeSearch=1&pThesauri=external.theme.GDI-Vlaanderen-trefwoorden&pKeyword=*" + unicode(q).encode('utf-8') +"*"
try:
if self.opener: response = self.opener.open(url, timeout=self.timeout)
else: response = urllib2.urlopen(url, timeout=self.timeout)
except (urllib2.HTTPError, urllib2.URLError) as e:
raise metaError( str( e.reason ))
except:
raise metaError( str( sys.exc_info()[1] ))
else:
result = ET.parse(response)
r= result.getroot()
themes = [ n.find("value").text for n in r[0].findall('keyword') ]
themes.sort()
return themes
def list_inspire_theme(self, q=''):
url = self.geoNetworkUrl + "/xml.search.keywords?pNewSearch=true&pTypeSearch=1&pThesauri=external.theme.inspire-theme&pKeyword=*" + unicode(q).encode('utf-8') +"*"
try:
if self.opener: response = self.opener.open(url, timeout=self.timeout)
else: response = urllib2.urlopen(url, timeout=self.timeout)
except (urllib2.HTTPError, urllib2.URLError) as e:
raise metaError( str( e.reason ))
except:
raise metaError( str( sys.exc_info()[1] ))
else:
result = ET.parse(response)
r= result.getroot()
themes = [ n.find("value").text for n in r[0].findall('keyword') ]
themes.sort()
return themes
def list_suggestionKeyword(self, q=''):
url = self.geoNetworkUrl + "/main.search.suggest?field=any"
if q:
url= url + "&q=" + unicode(q).encode('utf-8')
try:
if self.opener: response = self.opener.open(url, timeout=self.timeout)
else: response = urllib2.urlopen(url, timeout=self.timeout)
except (urllib2.HTTPError, urllib2.URLError) as e:
raise metaError( str( e.reason ))
except:
raise metaError( str( sys.exc_info()[1] ))
else:
result = json.load(response)
return result[1]
def list_organisations(self, q=''):
url = self.geoNetworkUrl + "/main.search.suggest?field=orgName"
if q:
url= url + "&q=" + unicode(q).encode('utf-8')
try:
if self.opener: response = self.opener.open(url, timeout=self.timeout)
else: response = urllib2.urlopen(url, timeout=self.timeout)
except (urllib2.HTTPError, urllib2.URLError) as e:
raise metaError( str( e.reason ))
except:
raise metaError( str( sys.exc_info()[1] ))
else:
result = json.load(response)
if len( result ) <= 2:
organisations = result[1]
organisations.sort()
return organisations
else:
return []
def list_bronnen(self):
url = self.geoNetworkUrl + "/xml.info?type=sources"
try:
if self.opener: response = self.opener.open(url, timeout=self.timeout)
else: response = urllib2.urlopen(url, timeout=self.timeout)
except (urllib2.HTTPError, urllib2.URLError) as e:
raise metaError( str( e.reason ))
except:
raise metaError( str( sys.exc_info()[1] ))
else:
result = ET.parse(response)
r= result.getroot()
bronnen = [ ( n.find("uuid").text, n.find("name").text )
for n in r[0].findall('source') ]
bronnen.sort()
return bronnen
def search(self, q="", start=1, to=20, themekey='', orgName='', dataType='', siteId='', inspiretheme='', inspireannex='', inspireServiceType='' ):
url = self._createFindUrl( q, start, to, themekey, orgName, dataType, siteId, inspiretheme, inspireannex, inspireServiceType)
try:
if self.opener: response = self.opener.open(url, timeout=self.timeout)
else: response = urllib2.urlopen(url, timeout=self.timeout)
except (urllib2.HTTPError, urllib2.URLError) as e:
raise metaError( str( e.reason ) +' on '+ url )
except:
raise metaError( str( sys.exc_info()[1] ))
else:
result = ET.parse(response)
resultXML = result.getroot()
return resultXML
def searchAll(self, q="", themekey='', orgName='', dataType='', siteId='', inspiretheme='', inspireannex='', inspireServiceType=''):
start= 1
step= 100
searchResult = self.search(q, start, step, themekey, orgName, dataType, siteId, inspiretheme, inspireannex, inspireServiceType)
count = int( searchResult[0].attrib["count"] )
start += step
while (start) <= count: #https://metadata.geopunt.be/zoekdienst/srv/dut/q?fast=index&sortBy=changeDate&to=&from=Herbruikbaar&any=%2A%2A'
result = self.search(q, start, (start + step -1), themekey, orgName, dataType, siteId, inspiretheme, inspireannex, inspireServiceType)
mds= result.findall("metadata")
for md in mds: searchResult.append( md )
start += step
return searchResult
class metaError(Exception):
def __init__(self, message):
self.message = message
def __str__(self):
return repr(self.message)
def getWmsLayerNames( url, proxyUrl='', port=''):
if (not "request=GetCapabilities" in url.lower()) or (not "service=wms" in url.lower()):
capability = url.split("?")[0] + "?request=GetCapabilities&version=1.3.0&service=wms"
else:
capability = url
if (isinstance(proxyUrl, unicode) or isinstance(proxyUrl, str)) & proxyUrl.startswith("http://"):
netLoc = proxyUrl.strip() + ":" + port
proxy = urllib2.ProxyHandler({'http': netLoc ,'https': netLoc })
opener = urllib2.build_opener(proxy)
responseWMS = opener.open(capability)
else:
responseWMS = urllib2.urlopen(capability)
result = ET.parse(responseWMS)
layers = result.findall( ".//{http://www.opengis.net/wms}Layer" )
layerNames=[]
for lyr in layers:
name= lyr.find("{http://www.opengis.net/wms}Name")
title = lyr.find("{http://www.opengis.net/wms}Title")
style = lyr.find("{http://www.opengis.net/wms}Style/{http://www.opengis.net/wms}Name")
if ( name != None) and ( title != None ):
if style == None: layerNames.append(( name.text, title.text, ''))
else: layerNames.append(( name.text, title.text, style.text))
return layerNames
def getWFSLayerNames( url, proxyUrl='', port=''):
if (not "request=GetCapabilities" in url.lower()) or (not "service=wfs" in url.lower()):
capability = url.split("?")[0] + "?request=GetCapabilities&version=1.0.0&service=wfs"
else:
capability = url
if (isinstance(proxyUrl, unicode) or isinstance(proxyUrl, str)) & proxyUrl.startswith("http://"):
netLoc = proxyUrl.strip() + ":" + port
proxy = urllib2.ProxyHandler({'http': netLoc ,'https': netLoc })
opener = urllib2.build_opener(proxy)
responseWFS = opener.open(capability)
else:
responseWFS = urllib2.urlopen(capability)
result = ET.parse(responseWFS)
layers = result.findall( ".//{http://www.opengis.net/wfs}FeatureType" )
layerNames=[]
for lyr in layers:
name= lyr.find("{http://www.opengis.net/wfs}Name")
title = lyr.find("{http://www.opengis.net/wfs}Title")
srs = lyr.find("{http://www.opengis.net/wfs}SRS")
if ( name != None) and ( title != None ):
if srs == None: layerNames.append(( name.text, title.text, 'EPSG:31370'))
else: layerNames.append(( name.text, title.text, srs.text))
return layerNames
def makeWFSuri( url, name='', srsname="EPSG:31370", version='1.0.0' ):
params = { 'SERVICE': 'WFS',
'VERSION': version ,
'REQUEST': 'GetFeature',
'TYPENAME': name,
'SRSNAME': srsname }
uri = url.split("?")[0] + '?' + urllib.unquote( urllib.urlencode(params) )
return uri