Invalid RPC Token

Hi,

I am trying to get XSRF Protected Services to work with my GWT project. I've coded everything and am trying to test. I get a strange error in JavaScript Console as follows:

Uncaught com.google.gwt.user.client.rpc.RpcTokenException: Invalid RPC token (Invalid RpcToken type: expected 'com.google.gwt.user.client.rpc.XsrfToken' but got 'class com.google.gwt.user.client.rpc.XsrfToken')

I downloaded the GWT 2.6 code using GIT and have grepped the code. I see that the file that is doing this is com.google.gwt.user.rebind.rpc.ProxyCreator.java in the method generateCheckRpcTokenTypeOverride. However, I'm at a loss to what it means. I have checked my class path for duplicate instances of XsrfToken but it is only found in gwt-servlet.jar in my war file.

Any ideas? Below is the copied generateCheckRpcTokenTypeOverride method.

Thanks in advance!

Patrick

  protected void generateCheckRpcTokenTypeOverride(SourceWriter srcWriter, TypeOracle typeOracle,
      SerializableTypeOracle typesSentFromBrowser) {

    JClassType rpcTokenType = typeOracle.findType(RpcToken.class.getName());
    JClassType[] rpcTokenSubtypes = rpcTokenType.getSubtypes();

    String rpcTokenImplementation = "";

    for (JClassType rpcTokenSubtype : rpcTokenSubtypes) {

      if (typesSentFromBrowser.isSerializable(rpcTokenSubtype)) {

        if (rpcTokenImplementation.length() > 0) {

          // >1 implematation of RpcToken, bail

          rpcTokenImplementation = "";

          break;

        } else {

          rpcTokenImplementation = rpcTokenSubtype.getQualifiedSourceName();

        }

      }

    }

    if (rpcTokenImplementation.length() > 0) {

      srcWriter.println("@Override");

      srcWriter.println("protected void checkRpcTokenType(RpcToken token) {");

      srcWriter.indent();

      srcWriter.println("if (!(token instanceof " + rpcTokenImplementation + ")) {");

      srcWriter.indent();

      srcWriter.println("throw new RpcTokenException(\"Invalid RpcToken type: " + "expected '"

          + rpcTokenImplementation + "' but got '\" + " + "token.getClass() + \"'\");");

      srcWriter.outdent();

      srcWriter.println("}");

      srcWriter.outdent();

      srcWriter.println("}");

    }

  }

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