WCF Address Types and Formats

This article will help to understand the basics of WCF Addresses.

Introduction

 
The three important components of an endpoint is address, binding and contract. Address is the heart of an endpoint or the main important component of the endpoint. Without the address we cannot find the endpoint to begin with; basically without the address the endpoints are useless. Address specifies where the service endpoint is. Every endpoint must have an address to which the endpoint is associated.
 
For example, an address might look like: http://www.c-sharpcorner.com/Publish
 
Here, http: -: the transport protocol.
 
   //www.c-sharpcorner.com -: website or machine running the service.
  /Publish -: the path to the specific service endpoint.
 

Address Types

 
Different types of addresses are associates with each endpoints and it is through addresses that the client communicates with the end point.
  • Endpoint Address

    The example given above specifies the address of a specific service endpoint which client can access.

    Once the client has accessed the service from above endpoint address, all the communication happens

  • Base Address

    Base address provide a way to specify a single, primary address for a given service and assign relative addresses to each individual endpoint.

    For example this base address assigned to a service: http://www.c-sharpcorner.com/Publish.

    Also we can have multiple individual endpoints to the address above.

    http://www.c-sharpcorner.com/Publish/service1
    http://www.c-sharpcorner.com/Publish/service2
    http://www.c-sharpcorner.com/Publish/service3
    http://www.c-sharpcorner.com/Publish/service4 etc..

  • MEX (Metadata exchange) Address

    Address allows a client to gather information about a particular service. MEX is an http endpoint address used to obtain service information.

    The information is provided through the service metadata, which describes the service.

    For example: http://www.c-sharpcorner.com/Publish/mex

Address Formats

 
Endpoint addresses are formatted based on the selected transport used in communication. As in the example above, most address formats contain the following parts:
  • Scheme that specifies the protocol.
  • A fully qualified domain name.
  • Based on requirements some services uses ports (default 80)
  • The specific or multiples paths of the services.
Now we will list different Address Formats and the differences.
  • HTTP Address

    The most common address format for a service is HTTP Address.

    format: http://domainname|machinename [:port]/path or paths

  • HTTPS Address

    Same as HTTP Address but HTTPS ca be secured by using SSL (Secure Socket Layer) and need to obtain a valid certificates.

    format: https://domainname|machinename [:port]/path or paths

  • TCP Address

    WCF provides a new TCP based network protocol for high performance communication.

    format: net.tcp://domainname|machinename [:port]/path or paths

  • MSMQ Address

    MSMQ address format differs from others.

    format: net.msmq://host name/ [private]/queue-name

    • Scheme that specifies the MSMQ protocol.
    • A fully qualified domain name of the machine running MSMQ or localhost.
    • [private] is optional, but when used it contains the address of a target queue that is private queue.
    • Queue-name is the name of the MSMQ name.

  • Named Pipe Address

    This address has no port number and communication using named pipes cannot be "cross-machine" (between two machines).

    format: net.pipe://localhost/service

  • IIS Address

    Here also a different in address format because IIS address requires a virtual directory name as well as a service (.svc) filename.

    format: http://domainname|machinename [:port]/virtual directory name [.svc filename]
Hope this articles helps you all, in understanding different types of address formats