[Zope] external method strangeness

[garry saddington]

On Wed, 2006-10-18 at 15:07 -0400, Paul Winkler wrote:
> On Wed, Oct 18, 2006 at 06:13:38PM +0100, garry saddington wrote:
> > Can anyone explain what is happening here. I am using Saxon to transform
> > an xml file(source) using a stylesheet(style) the result is then written
> > to Postgres. The contents of source are uploaded in Zope and passed to
> > the external method as a string. When I run this external method:
> > 
> > import psycopg, string, re, subprocess
> > def scholarpack_xml_transform(source):
> >     f=open('/opt/scholarpack/ancillary/source.xml','w')
> >     f.write(source) 
> 
> I have no idea what's causing your problem, but this raises
> red flags for me: if two people upload sources at the same time,
> you'll have problems here.
There is no chance of this as it is a one-off populate the db exercise.


>  If you really really must read/write
> files on the filesystem, either use locks or use python's
> tempfile module.
> 
> >     f.close
> >     source= '/opt/scholarpack/ancillary/source.xml'
> >     style='/opt/scholarpack/ancillary/style.xml'
> >     source1=source.replace(''','`')
> >     source2=source1.replace('NLPGaddress','BS7666address')
> >     p=re.compile("\'")
> >     source3=p.sub( '`' , source2)
> >     r = subprocess.Popen(['/opt/scholarpack/ancillary/jre/bin/java','-jar','./saxon.jar',source3,style], stdout = subprocess.PIPE,cwd = '/opt/scholarpack/ancillary/')
> 
> Are you just using saxon for xslt processing?  If so, IMO using an
> external process for that is severe overkill.  Get lxml and try
> something like this:
> 
>     from lxml import etree
>     style = etree.XSLT(etree.parse(some_file_object))
>     transformed = style.apply(source_data)
Thank you I've never heard of this, I'll give it a try. I was using
4suite but it started to misbehave in the way that I wanted to use it.
regards
Garry

> 
> but again, this doesn't address your immediate problem :)
>