Impersonation is a technique that WCF Services use to authorize the caller’s identity to access to service resources such as files and database tables. Service resources can be located either on local service machine or remotely hosted. The resources are being accessed by WCF Service’s process identity or specific windows identity. Difference between Impersonation and Delegation in WCF...
How to choose right WCF binding?
Binding in WCF defines how clients can connect with your service. The base class for all bindings in WCF is System.ServiceModel.Channels.Binding. A Binding includes definition for WS-* protocols used, the message encoding and the transport protocol.
The available WCF Bindings are
wsHttpBinding
basicHttpBinding
netTcpBinding
netNamedPipeBinding
netMsmqBinding
wsDualHttpBinding
Transport and Message Security in WCF
This post discusses about transport and message security. In Transport Security user credentials and claims are passed using transport layer. The transport protocols are TCP, HTTP, MSMQ and IPC. Each of these protocols have their own mechanism for passing user credentials. The most common approach is using secure socket layer(SSL) for encrypting the details which sent over HTTPS.
Service Orientation vs Object Orientation
Services are good communication technique to use across application and platform boundaries. Service-oriented approach always preferred when you are building a distributed application. Object orientation approach provides a view of what a system should look and effective for producing logical models. Object based approach can fail to consider real-world factors like physical distribution and...
WCF 4.5 Features
This post discusses the new features in WCF 4.5. There have been significant improvements in WCF 4.5 on configuration. Simplifying the generated configuration file in client A client configuration file is generated when you add a service reference in Visual Studio 2010. The configuration files in earlier version of WCF contained the value of every binding property even if it is a default...
WebSockets in ASP.NET 4.5
This post discuss about using WebSockets in ASP.NET 4.5. You can read this post to get an understanding about WebSockets. This post shows piece of code which uses WebSockets in ASP.NET 4.5 and the code is related to simple chat application. The HTML of Web Form chat application looks as below It contains a text box where you can type your text message and button where it sends a...
WCF Services in Windows Azure
What is Windows Azure? Windows Azure provides developers computation power storage and can scale web applications on internet through Microsoft Datacenters. Developers can use Azure platform to build WCF service application using their existing Visual Studio 2010 expertise. Windows Azure supports the protocols and formats including SOAP, REST and XML. This post discuss about creating a...
WCF AJAX Service Without Configuration
This post discusses how to develop Windows Communication Foundation (WCF) service using AJAX and without any configuration settings for WCF. This service can be consumed from Javascript. The service uses a special setting in .svc file which automatically enables an AJAX endpoint.
WCF Service using MTOM in .NET FW 4
Web services having a greater interoperability to communicate messages across heterogeneous systems, however challenge is serializing the data into XML. Users may want to send images,videos, drawings, xml documents etc. together with SOAP message. What is MTOM? Message Transmission Optimization Mechanism (MTOM) is a mechanism of transferring transferring large amounts binary data as...
WCF Discovery with UDP
Inorder to call the WindowsCommunicationFoundation service, a port or pipe which assigned to the service must be available and the client must know the address endpoints before calling the services. If the service could use any available address then client can discover that address at runtime. There is a industry standard-based solution which helps in discovering the service addresses. Address...