A WCF Service from IronPython

By Michael Foord -
Windows Communication Foundation (WCF) is part of .NET 3 and makes creating and interacting with web services from C# substantially easier. WCF makes extensive use of .NET attributes, making it difficult to use from IronPython versions before 2.6 without wrapping the use of attributes in some C#.

IronPython 2.6 brings in support for attributes through the __clrtype__ metaclass. It doesn't yet allow you to create a .NET interface from pure Python code (although you can implement existing interfaces just by inheriting from them), so *some* C# is still needed for full use of WCF with IronPython 2.6. The dynamic languages team are looking at ways that __clrtype__ could be extended to allow the creation of interfaces in a future release.

In his latest blog post Lukáš Čenovský demonstrates how to create a WCF service from C# and then shows the same code from IronPython, along with the minimal C# still needed.
Until IronPython 2.6, it was not possible to create WCF service host in pure IronPython. The closest way was to create stub in C# and subclass it in IronPython or create the whole service in C# and run it from IronPython. It is now much simpler with IronPython 2.6 although you still have to write a little C# code.

Comments

  1. Lukáš Čenovský11/10/2009 11:11 pm

    Looks like it will be possible to create WCF service in pure IronPython without any C# - see this checkin where there is a comment:

    Changeset Id: 1258596
    Date: 11/6/2009 2:16:40 PM

    (sborde) Adds support to declare intefaces in the clrtype sample

    ReplyDelete

Post a Comment

Popular posts from this blog

Extending Abobe Flash Player and AIR with Python and Ruby

By Michael Foord -
An intriguing blog entry about an Adobe experimental project. It is a C/C++ cross- compiler for the flash player and AIR. This means that you can (will be able to?) cross-compile the Python / Ruby/ lots of other language runtimes and then run them in Flash. The blog entry contrasts this approach to the DLR which requires the re-implementation of dynamic languages - hence IronPython and IronRuby. The project is already beyond proof-of concept, they even have Quake III cross-compiled and running in Flash. Extending Adobe Flash Player and AIR with C/C++ Cross-Compiler Quake 3 has already been ported to managed code , but this is even more impressive. Whether the Python interpreter can be cross-compiled to run on top of another runtime (with completely different basic types), without changing the language semantics at all, has yet to be proved - but it is a very interesting project. (It also means that Python/Ruby will possibly be enabled only by additional optional downloads - but don...
Read more

IronPython Tools for Visual Studio CTP3

By Michael Foord -
At PyCon this year Dino Veihland announced IronPython Tools for Visual Studio, an extension to Visual Studio 2010 for working with IronPython. It features Python syntax highlighting, awesome auto-complete (intellisense) and a host of other features for working with IronPython code in Visual Studio. It can be used with the free Visual Studio shell and doesn't require you to own a full copy of Visual Studio. The third CTP (Community Technology Preview) has been made available for download. IronPython Tools for Visual Studio We are happy to announce a minor update to the IronPython Tools for Visual Studio.  IronPython Tools for Visual Studio (IPyTools) is a set of extensions available for Visual Studio 2010 which supports development of IronPython applications.  This release is our 3rd Community Technical Preview (CTP) and builds upon the previous two releases.  The release is a minor update which includes bug fixes and a number of small features.  You can download...
Read more

Further Adventures of the Debugger

By Michael Foord -
Harry Pierson (Microsoft IronPython PM) has been experimenting with writing an IronPython debugger ( ipydbg ) on top of the .NET MDbg APIs. When we last left him , he had implemented Just My Code (JMC) support allowing you to step into IronPython code. Since then he has made a lot of progress including a colourful REPL (interactive console) and solving some difficult problems around getting to real values behind boxed IronPython variables (needed for showing local variables). He has blogged extensively on what he has been up to (more recent posts last): Showing Source Code Colorful Console IronPython ConsoleColorMgr (the colorful console code pulled out into a separate IronPython module) A Little Hack...err...Cleanup Getting Local Variables Displaying Values Command Routing Getting Arguments REPL Console A lot of functionality is now present. In the command routing entry Harry outlines the seven commands supported by the debugger so far: Continue, Quit, Show Stack Trace, Show Locals, ...
Read more