Changes between Version 2 and Version 3 of HowToDoCSWTransactionOperations

Timestamp:

Oct 20, 2009, 9:48:38 AM (15 years ago)

Author:

fxp

Comment:

--

HowToDoCSWTransactionOperations

@@ -9 +9 @@
 
 === Python ===
-  * TODO
+{{{
+Python 2.6
+Wolfgang Grunberg
+Arizona Geological Survey
+10/20/2009
+"""
+
+# Library Imports
+import urllib
+import urllib2
+import cookielib
+
+# module globals and constants
+__author__ = "Wolfgang Grunberg"
+__credits__ = ["Wolfgang Grunberg", "the Internets"]
+__email__ = "wgrunberg@azgs.az.gov"
+__status__ = "Prototype"                  # "Prototype", "Development", or "Production"
+
+# GeoNetwork constants
+gn_username = "admin"
+gn_password = "admin"
+gn_baseURL = "http://localhost:8080"
+gn_loginURI = "/geonetwork/srv/en/xml.user.login"
+gn_logoutURI = "/geonetwork/srv/en/xml.user.logout"
+gn_cswURI = "/geonetwork/srv/en/csw"
+
+
+def gn_csw_transaction():
+   """
+   Execute GeoNetwork authentication and CSW transaction post
+   """
+   # HTTP header for authentication
+   header_urlencode = {"Content-type": "application/x-www-form-urlencoded", "Accept": "text/plain"}
+   # HTTP header for CSW request
+   header_xml = {"Content-type": "application/xml", "Accept": "text/plain"}
+   # authentication Post parameters
+   post_parameters = urllib.urlencode({"username": gn_username, "password": gn_password})
+
+   # Sample CSW transactions
+   xml_request = "<?xml version=\"1.0\"?>\
+           <csw:DescribeRecord xmlns:csw=\"http://www.opengis.net/cat/csw/2.0.2\"\
+           service=\"CSW\" version=\"2.0.2\" outputFormat=\"application/xml\"\
+           schemaLanguage=\"http://www.w3.org/XML/Schema\"/>"
+
+   # log in URL
+   url_in = gn_baseURL+gn_loginURI
+   # log out URL
+   url_out = gn_baseURL+gn_logoutURI
+   # CSW URL
+   url_csw = gn_baseURL+gn_cswURI
+
+
+   # first, always log out
+   request = urllib2.Request(url_out)
+   response = urllib2.urlopen(request)
+   #print response.read()       # debug
+
+   # send authentication request
+   request = urllib2.Request(url_in, post_parameters, header_urlencode)
+   response = urllib2.urlopen(request)
+   # a basic memory-only cookie jar instance
+   cookies = cookielib.CookieJar()
+   cookies.extract_cookies(response,request)
+   cookie_handler= urllib2.HTTPCookieProcessor( cookies )
+   # a redirect handler
+   redirect_handler= urllib2.HTTPRedirectHandler()
+   # save cookie and redirect handler for future HTTP Posts
+   opener = urllib2.build_opener(redirect_handler,cookie_handler)
+
+   # CSW request
+   request = urllib2.Request(url_csw, xml_request2, header_xml)
+   response = opener.open(request)
+   # CSW respons
+   xml_response = response.read()
+   print xml_response  # debug
+
+   # Do something with the response. For example:
+   #xmldoc = minidom.parseString(xml_response)
+   #for node in xmldoc.getElementsByTagName('ows:ExceptionText'):       # display <ows:ExceptionText /> value(s)
+   #    print "    EXCEPTION: "+node.firstChild.nodeValue
+   #xmldoc.unlink()     # cleanup DOM for improved performance
+
+   # more CSW requests if desired
+
+   # Last, alaways log out
+   request = urllib2.Request(url_out)
+   response = urllib2.urlopen(request)
+   #print response.read()       # debug
+
+
+if __name__=="__main__":
+   gn_csw_transaction()
+}}}