BUG-2877: Allow hello message with no namespace

[controller.git] / opendaylight / netconf / netconf-client / src / main / java / org / opendaylight / controller / netconf / client / NetconfClientSessionNegotiator.java

diff --git a/opendaylight/netconf/netconf-client/src/main/java/org/opendaylight/controller/netconf/client/NetconfClientSessionNegotiator.java b/opendaylight/netconf/netconf-client/src/main/java/org/opendaylight/controller/netconf/client/NetconfClientSessionNegotiator.java
index 06c695c25a1941d74877234a7c030a45b34ac7e1..f4017fbe5897521e5589f36e987abdc454cfb895 100644 (file)
--- a/opendaylight/netconf/netconf-client/src/main/java/org/opendaylight/controller/netconf/client/NetconfClientSessionNegotiator.java
+++ b/opendaylight/netconf/netconf-client/src/main/java/org/opendaylight/controller/netconf/client/NetconfClientSessionNegotiator.java
@@ -8,7 +8,7 @@
 
 package org.opendaylight.controller.netconf.client;
 
-import com.google.common.base.Preconditions;
+import com.google.common.base.Strings;
 import com.google.common.collect.ImmutableList;
 import io.netty.channel.Channel;
 import io.netty.channel.ChannelFuture;
@@ -45,6 +45,9 @@ public class NetconfClientSessionNegotiator extends
     private static final XPathExpression sessionIdXPath = XMLNetconfUtil
             .compileXPath("/netconf:hello/netconf:session-id");
 
+    private static final XPathExpression sessionIdXPathNoNamespace = XMLNetconfUtil
+            .compileXPath("/hello/session-id");
+
     private static final String EXI_1_0_CAPABILITY_MARKER = "exi:1.0";
 
     protected NetconfClientSessionNegotiator(final NetconfClientSessionPreferences sessionPreferences,
@@ -113,16 +116,22 @@ public class NetconfClientSessionNegotiator extends
     }
 
     private long extractSessionId(final Document doc) {
-        final Node sessionIdNode = (Node) XmlUtil.evaluateXPath(sessionIdXPath, doc, XPathConstants.NODE);
-        Preconditions.checkState(sessionIdNode != null, "");
-        String textContent = sessionIdNode.getTextContent();
-        if (textContent == null || textContent.equals("")) {
-            throw new IllegalStateException("Session id not received from server");
+        String textContent = getSessionIdWithXPath(doc, sessionIdXPath);
+        if (Strings.isNullOrEmpty(textContent)) {
+            textContent = getSessionIdWithXPath(doc, sessionIdXPathNoNamespace);
+            if (Strings.isNullOrEmpty(textContent)) {
+                throw new IllegalStateException("Session id not received from server, hello message: " + XmlUtil.toString(doc));
+            }
         }
 
         return Long.valueOf(textContent);
     }
 
+    private String getSessionIdWithXPath(final Document doc, final XPathExpression sessionIdXPath) {
+        final Node sessionIdNode = (Node) XmlUtil.evaluateXPath(sessionIdXPath, doc, XPathConstants.NODE);
+        return sessionIdNode != null ? sessionIdNode.getTextContent() : null;
+    }
+
     @Override
     protected NetconfClientSession getSession(final NetconfClientSessionListener sessionListener, final Channel channel,
             final NetconfHelloMessage message) throws NetconfDocumentedException {