--- ECHO_content/ECHO_helpers.py	2004/10/19 18:44:26	1.20
+++ ECHO_content/ECHO_helpers.py	2004/10/28 13:38:40	1.24
@@ -1,6 +1,49 @@
 import socket
 import urllib
+import xml.dom.minidom
+from types import *
+
+def toList(field):
+    """Einzelfeld in Liste umwandeln"""
+    if type(field)==StringType:
+        return [field]
+    else:
+        return field
+
+def getText(nodelist):
+
+    rc = ""
+    for node in nodelist:
+    	if node.nodeType == node.TEXT_NODE:
+           rc = rc + node.data
+    return rc
+
+
+def readFieldFromXML(meta_url,parent,field):
+	"""lesespezifisches metadatum"""
 	
+	try:
+		dom=xml.dom.minidom.parse(meta_url)
+
+	except:
+		try:
+			fh=urllib.urlopen(meta_url)
+			dom=xml.dom.minidom.parse(fh)
+	        except:
+			return None
+	if not dom: return None
+
+	parent=dom.getElementsByTagName(parent)
+	if not parent: return None
+
+	field=parent[0].getElementsByTagName(field)
+
+	if not field: return None
+
+	return getText(field[0].childNodes)
+	
+	
+	      
 def urlopen(url):
 	"""urlopen mit timeout"""
 	socket.setdefaulttimeout(2)