XML-RPC server via xinetd

[Jos Vos]

Hi,

I'm trying to figure out how to implement a XML-RPC server that
is called by xinetd i.s.o. listening on a TCP socket itself.

I already have implemented a stand-alone XML-RPC server using
SimpleXMLRPCSer ver, but I now want something similar, that is
started via xinetd (i.e. reading/writing via stdin/stdout).

Any hints or code examples?

Thanks,

--
-- Jos Vos <jo*@xos.nl>
-- X/OS Experts in Open Systems BV | Phone: [phone]
-- Amsterdam, The Netherlands | Fax: [phone]

[Fredrik Lundh]

Nick Craig-Wood wrote:

Look at /usr/lib/python2.4/SimpleXMLRPCSer ver.py (adjust as per your
distro) and in particular the definition of the CGIXMLRPCReques tHandler class.

That looks as thought it almost, or maybe completely, does what you
want, ie an XMLRPC subclass which reads from stdin and writes to
stdout.

except that if the OP's expecting the other end to use an ordinary XML-RPC
library, he needs to implement some minimal HTTP handling as well.

import sys
import mimetools, xmlrpclib

command = sys.stdin.readl ine()
# optional: check command syntax (POST url HTTP/1.X)

headers = mimetools.Messa ge(sys.stdin)
# optional: check content-type etc

bytes = int(headers.get ("content-length", 0))
# optional: check request size, etc

params, method = xmlrpclib.loads (sys.stdin.read (bytes))

# handle the method
result = ...

# marshaller expects a tuple
result = (result, )

response = xmlrpclib.dumps (result, methodresponse= 1)

print "HTTP/1.0 200 OK"
print "Content-Type: text/xml"
print "Content-Length:", len(response)
print
print response

(based on code from http://effbot.org/zone/xmlrpc-cgi.htm )

</F>

[Jos Vos]

On Mon, Apr 17, 2006 at 12:36:18PM +0200, Brian Quinlan wrote:

I don't know exactly what your usage pattern is, but you might be able
to use SimpleXMLRPCDis patcher directly e.g.

>>> s = SimpleXMLRPCDis patcher()
>>> s.register_func tion(pow)
>>> s._marshaled_di spatch('<?xml version="1.0".. .)

'<?xml version="1.0".. .

Will look at that too, but as I want to be able to use the same XML-RPC
client as I talk to with my SimpleXMLRPCSer ver (thus talking HTTP), I
think I need to CGI sugar.

Note that the main reason I'm looking to the "xinetd way" is that
I want to use proper SSL-based traffic and the SecureXMLRPCSer ver
flying around, using pyOpenSSL (or so), does not do a complete job
(because pyOpenSSL does not do a complete job IIRC) and needs to
be tweaked anyway, so I now hope to use stunnel.

--
-- Jos Vos <jo*@xos.nl>
-- X/OS Experts in Open Systems BV | Phone: [phone]
-- Amsterdam, The Netherlands | Fax: [phone]

[Jos Vos]

On Mon, Apr 17, 2006 at 12:42:00PM +0200, Fredrik Lundh wrote:

except that if the OP's expecting the other end to use an ordinary XML-RPC
library, he needs to implement some minimal HTTP handling as well.

Which makes me wondering why the classes (this also applies to
BaseHTTPServer / BaseHTTPRequest Handler) ae designed the way they
are. The underlying stream medium (TCP sockets or plain file
streams like stdin/stdout) should not be integrated with the
protocol (HTTP) handling, IMHO...

--
-- Jos Vos <jo*@xos.nl>
-- X/OS Experts in Open Systems BV | Phone: [phone]
-- Amsterdam, The Netherlands | Fax: [phone]