|Internet Business Consultant|
|Home||Blog||Bio||Projects||Contact||Latest Blog (new site): How to Get to Genius|
XML-RPC is a simple, portable way to make remote procedure calls over HTTP. It can be used with Perl, Java, Python, C, C++, PHP and many other programming languages. Implementations are available for Unix, Windows and the Macintosh.
Here's a short XML-RPC client written in Perl. (We use Ken MacLeod's Frontier::Client module.)
When run, this program will connect to the remote server, get the state name, and print it. (State #41 should be South Dakota in this example.)
Here's the same program in Python. (This time, we use Fredrik Lundh's xmlrpclib.)
In the following chapters, you'll learn how to write XML-RPC clients and servers in a variety of programming languages.
XML-RPC is described fully in Dave Winer's official specification. If you're curious, go ahead and take a look—it's a quick and straight-forward read.
On the wire, XML-RPC values are encoded as XML:
This is verbose, but compresses readily. It's also faster than you might expect—according to measurements by Rick Blair, a round-trip XML-RPC call takes 3 milliseconds using Hannes Wallnöfer's Java implementation.
XML-RPC supports the following data types:
XML-RPC was inspired by two earlier protocols. The first is an anonymous RPC protocol designed by Dave Winer and announced in an old DaveNet essay. (This is why XML-RPC servers are often installed under /RPC2.) The other, more important inspiration was an early draft of the SOAP protocol.
A longer history of XML-RPC has been generously provided by Dave Winer. This also explains the relationship between XML-RPC and SOAP.
Services: Search Engine Optimization Promotion
|Electric Speed: Web Application Developer|