【转】ZSI + mod_wsgi

ZSI in mod_wsgi

Hello,I've been using the dispatch.AsCGI handler from ZSI behind an apache for
quite a while. Now that the load is increasing on the server,the cost
of forking CGIs becomes a bottleneck. After making my handling process
thread safe,I've integrated it in mod_wsgi environment.

While looking for this list,I stumbled upon
http://sourceforge.net/mailarchive/message.php?msg_id=9982866
I haven't looked at the ZSI.ServiceContainer,but for the ZSI.dispatch,based on AsCGI,I've added the following,which works for me:

--8<--
def _WSGISendXML(text,code = "200 OK",**kw):
    response_headers = [('Content-type','text/xml; charset="%s"'
%UNICODE_ENCODING),('Content-Length',str(len(text)))]
    kw['start_response'](code,response_headers)
    return [text]

def _WSCGISendFault(f,**kw):
    return _WSGISendXML(f.AsSOAP(),"500 Internal Server Error",**kw)

def AsWSGI(environ,start_response,nsdict={},typesmodule=None,rpc=False,modules=None):
    '''Dispatch within mod_wsgi
    '''
    if environ.get('REQUEST_METHOD') != 'POST':
        return _WSCGISendFault(Fault(Fault.Client,'Must use POST'),start_response = start_response)
    ct = environ['CONTENT_TYPE']
    try:
        if ct.startswith('multipart/'):
            cid = resolvers.MIMEResolver(ct,environ['wsgi.input'])
            xml = cid.GetSOAPPart()
            ps = ParsedSoap(xml,resolver=cid.Resolve)
        else:
            length = int(environ['CONTENT_LENGTH'])
            ps = ParsedSoap(environ['wsgi.input'].read(length))
    except ParseException,e:
        return _WSCGISendFault(FaultFromZSIException(e),start_response =
start_response)
    except ExpatError,start_response =
start_response)
    return dispatch._Dispatch(ps,modules,_WSGISendXML,_WSCGISendFault,nsdict=nsdict,typesmodule=typesmodule,rpc=rpc,start_response = start_response)
--
Note: in AsWSGI,the ExpatError exception is raised when an incorrectly
formatted XML flow is received. But shouldn't it be trapped in
ParsedSoad and raised as a ParseException?

Then,my .wsgi script looks like:
--8<--
from ZSI import dispatch
import sessionManagement

def application(environ,start_response):
    return dispatch.AsWSGI(environ,modules =
(sessionManagement,))
--

Best Regards,

原始链接：

http://permalink.gmane.org/gmane.comp.python.pywebsvcs.general/3594