[Zope] XML-RPC vs External method?

[Ender]

if the xml format is simple you could just do it dtml, it would end up
with some extra white space but it would still be valid.

a dtml method akin to 

<?xml version="1.0"?>
<dtml-in mysqlretrieve>
<item>
	<content><dtml-var content></content>
	<squishy><dtml-var squishy></content>
</item>
</dtml-in>


kapil


Irene Barg wrote:
> 
> Hello all,
> 
> I have setup a query form to query a small MySQL database using
> Zope.  It consists of:
> 
> 1.  ZMySQL Database Connection (ZMySQLDA)
> 2.  ZSQL method
> 3.  A search interface.
> 
> Now, what I want is the user to have the option of viewing the
> results in HTML or raw XML.  I think there can be two approaches
> to this:  1. External method, or 2. XML-RPC.
> 
> 1.  External method:  Replaces the ZMySQL database connection
> with an external Python function called 'mysqldb_XML', pieces
> of which follow:
> 
> def mysqldb_XML(self,query):
>     """
>     Use a MySQL SAX driver to map relational data to XML.
>     Hacked from PyXML saxdemo.py.  The MySQL driver is a modified
>     version of Sean McGrath's drv_mysql.py ("XML Processing with
> Python").
>     """
>     from xml.sax import saxexts, saxlib, saxutils, writer
>     import sys,urllib
> 
>     #Our MySQLdb XML driver;
>     driver="xml.sax.drivers.drv_mysqldb"
>     .....
>     out = sys.stdout;
>     p=saxexts.make_parser(driver)
>     dh=writer.PrettyPrinter(out,dtdinfo=info)
>     try:
>         p.setDocumentHandler(dh)
>         return p.parse(query)
>     except IOError,e:
>         return in_sysID+": "+str(e)
>     except saxlib.SAXException,e:
>         return str(e)
> 
> Inside Zope, I get the ZSQL 'query' and do something like:
> 
> <dtml-call "RESPONSE.setHeader('content-type','text/xml')">
> <dtml-in "mysqldb_XML(query)">
>   <dtml-var sequence-item>
> </dtml-in>
> 
> 2.  XML-RPC:  It seems to me XML-RPC could do this too, but
> I don't know how one would print out the raw XML response.
> Could I have a Zope client request the ZSQL method above,
> but instead of sending it to my output DTML method, I just
> print the raw-XML stream?  Examples would be helpful:-)
> 
> It seems to me if XML-RPC already produces an XML formatted
> stream, it would be more efficient to just use it (unless
> there is yet another way in Zope I'm not aware of).  Is it
> possible?  Is there any reason to want to use the external
> method instead?
> 
> Thanks for your comments,
> 
> --irene
> 
> ------------------------------------------------------------------
> Irene Barg                      Email:  ibarg@as.arizona.edu
> Steward Observatory             Phone:  520-621-2602
> 933 N. Cherry Ave.
> University of Arizona           FAX:    520-621-1891
> Tucson, AZ  85721               http://nickel.as.arizona.edu/~barg
> ------------------------------------------------------------------
> 
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