fixing cashing capabilities

OWS.py

@@ -78,9 +78,6 @@ class OWS:
             from owslib.wcs import WebCoverageService
             self.capabilities = WebCoverageService(url=self.url,version="1.0.0")
 
-        # cache capabilities document
-        open(os.path.join(self.cachedir,"capabilities.xml"),"w").write(ElementTree.tostring(self.capabilities._capabilities))
-
     def getParams(self):
         params =  urlparse.parse_qs(self.qstring)
 
@@ -199,9 +196,9 @@ class OWS:
             if md5.new(oldCaps).hexdigest() == md5.new(newXml).hexdigest():
                 newCapsFile = open(os.path.join(self.cachedir,"capabilities.xml"),"w")
                 newCapsFile.write(newXml)
-                logging.debug("Capabilities unchanged, using existing mapfile %s" % self.getMapfileLocation())
                 mapfilename = self.getMapfileLocation()
                 if os.path.exists(mapfilename):
+                    logging.debug("Capabilities unchanged, using existing mapfile %s" % self.getMapfileLocation())
                     return mapscript.mapObj(mapfilename)
                 
 
@@ -262,6 +259,11 @@ class OWS:
             # sense for other cases
             logging.info("Saving mapfile to %s" %  self.mapfilename)
             mapobj.save(self.mapfilename)
+
+            # cache capabilities document
+            logging.info("Saving service Capabilities to %s" % os.path.join(self.cachedir,"capabilities.xml"))
+            open(os.path.join(self.cachedir,"capabilities.xml"),"w").write(ElementTree.tostring(self.capabilities._capabilities))
+
         else:
             logging.info("Mapfile NOT saved")