/// <summary>
/// Just after the request has arrives on the server
/// </summary>
/// <param name="request"></param>
/// <param name="channel"></param>
/// <param name="instanceContext"></param>
/// <returns></returns>
public object AfterReceiveRequest(ref Message request, IClientChannel channel, InstanceContext instanceContext)
{
if (IsNeedToAppendHeader(request))
{
// Read the custom context data from the headers
ServiceHeader header = CustomHeader.ReadHeader(request);
if (header == null)
{
throw new FaultException("The request is invalid. Authorization header could not be found.");
}
if (string.IsNullOrWhiteSpace(header.UserToken))
{
throw new FaultException("Authorization token value could not be found in service header.");
}
//check if supplied header and current service session ID matches
//if not then throw the exception
if (!OperationContext.Current.SessionId.Equals(header.UserToken, StringComparison.OrdinalIgnoreCase))
{
throw new FaultException("Invalid User token.");
}
}
return(null);
}
/// <summary>
/// Just before the response leaves the server
/// </summary>
/// <param name="request"></param>
/// <param name="channel"></param>
/// <returns></returns>
public object BeforeSendRequest(ref Message request, IClientChannel channel)
{
var actionName = request.Headers.Action.Substring(request.Headers.Action.LastIndexOf("/", StringComparison.OrdinalIgnoreCase) + 1);
//if action name is login then allow the request to the service
if (actionName.Equals("validatelogin", StringComparison.OrdinalIgnoreCase))
{
return(null);
}
ServiceHeader customData = new ServiceHeader();
customData.UserToken = ClientContext.UserToken;
CustomHeader header = new CustomHeader(customData);
request.Headers.Add(header);
return(request);
}
public static ServiceHeader ReadHeader(Message request)
{
int headerPosition = request.Headers.FindHeader(CUSTOM_HEADER_NAME, CUSTOM_HEADER_NAMESPACE);
if (headerPosition == -1)
{
return(null);
}
MessageHeaderInfo headerInfo = request.Headers[headerPosition];
XmlNode[] content = request.Headers.GetHeader <XmlNode[]>(headerPosition);
string text = content[0].InnerText;
XmlSerializer deserializer = new XmlSerializer(typeof(ServiceHeader));
TextReader textReader = new StringReader(text);
ServiceHeader customData = (ServiceHeader)deserializer.Deserialize(textReader);
textReader.Close();
return(customData);
}
public CustomHeader(ServiceHeader customData)
{
_customData = customData;
}