WCF自动添加消息头

客户端自定义消息查看器实现IClientMessageInspector接口在消息发送之前添加消息头

class ClientMessageInspector : System.ServiceModel.Dispatcher.IClientMessageInspector, System.ServiceModel.Description.IEndpointBehavior
{
    public Dictionary<string, string> HeaderValue { get; set; }

    #region Implementation for IClientMessageInspector
    public void AfterReceiveReply(ref System.ServiceModel.Channels.Message reply, object correlationState) { }

    public object BeforeSendRequest(ref System.ServiceModel.Channels.Message request, System.ServiceModel.IClientChannel channel)
    {
        if (HeaderValue != null)
        {
            foreach (var v in HeaderValue)
            {
                request.Headers.Add(System.ServiceModel.Channels.MessageHeader.CreateHeader(v.Key, "client", v.Value));
            }
        }

        return null;
    }
    #endregion

    #region Implementation for IEndpointBehavior
    public void AddBindingParameters(System.ServiceModel.Description.ServiceEndpoint serviceEndpoint, System.ServiceModel.Channels.BindingParameterCollection bindingParameters) { }

    public void ApplyClientBehavior(System.ServiceModel.Description.ServiceEndpoint serviceEndpoint, ClientRuntime behavior)
    {
        //此处为Extension附加到ClientRuntime。
        behavior.MessageInspectors.Add(this);
    }

    public void ApplyDispatchBehavior(System.ServiceModel.Description.ServiceEndpoint serviceEndpoint, EndpointDispatcher endpointDispatcher)
    {
        //如果是扩展服务器端的MessageInspector，则要附加到EndpointDispacther上了。
        //endpointDispatcher.DispatchRuntime.MessageInspectors.Add(this);
    }

    public void Validate(System.ServiceModel.Description.ServiceEndpoint serviceEndpoint) { }
    #endregion
}

//添加消息头
client.ChannelFactory.Endpoint.Behaviors.Add(new ClientMessageInspector()
{
    HeaderValue = new Dictionary<string, string>() { 
        {"OrganID", GetAppSetting("OrganID")},
        {"HandshakeCode", GetAppSetting("HandshakeCode")}
    }
});

服务器端获取消息头

private string GetHeaderValue(string name)
{
    var headers = OperationContext.Current.IncomingMessageHeaders;
    var index = headers.FindHeader(name, "client");
    if (index > -1)
    {
        return headers.GetHeader<string>(index);
    }

    return string.Empty;
}