Call Web Service using proxy and http authentication
totobe at gmail.com
Fri May 15 00:13:45 EDT 2009
On May 13, 5:26 pm, Steve Howell <showel... at yahoo.com> wrote:
> On May 12, 12:51 pm, wdveloper <tot... at gmail.com> wrote:
> > On May 12, 8:38 pm, Steve Howell <showel... at yahoo.com> wrote:
> > > On May 12, 8:59 am, wdveloper <tot... at gmail.com> wrote:
> > > > Hi everyone,
> > > > I am trying to call a webservice which requires an http
> > > > authentication.
> > > > To reach the ws, I must pass from a proxy http. So in the whole I need
> > > > go through two authentications before getting the ws working. I am
> > > > using SOAPpy and I'm getting quite crazy.
> > > > I am able to arrange this problem with simple http calls using urllib2
> > > > but for the ws i dont see any way out.
> > > > Does anyone knows how I can manage this stuff? Is there any better
> > > > solution or example code?
> > > Your high level description of the problem is good, but I think you'll
> > > get more help if you provide a little more detail.
> > > For something like this you may want to try to do more at the HTTP
> > > level, where you have a little more control over the authentication,
> > > and then find a way to hook into SOAPpy just to build and parse the
> > > payloads.
> > > How good is your understanding of HTTP? Do you know the basics of how
> > > headers work? You might want to brush up a little on HTTP just to
> > > help understand what's going on; it will almost certainly be valuable
> > > for future projects as well.
> > > To understand how the proxy works in particular, if you can use the
> > > proxy to access a normal html-serving website, you can use the "Live
> > > HTTP Headers" tool under Firefox to see what's going on.
> > > But before all that, I would maybe just post a little more detail on
> > > the problem. Maybe show code you've written so far, and any error
> > > messages/tracebacks, to better indicate where you are stuck.
> > Thank you very much Steve,
> > I do have a good understanding of http and its headers rules, and of
> > course I can work on that.
> > On the other hand, I am new to python and SOAPpy toolkit and I dont
> > have much of an experience working with ws in general.
> > When it comes of working with simple call to WS, everything is
> > successfull; problems start cause I dont know how to use the toolkit
> > to compose the http request. I should code it in the way that it
> > connects to my proper proxy and it gets authenticated in the server
> > exposing the service.
> > What I have is something like:
> > from SOAPpy import WSDL
> > wsdl = 'http://myws?wsdl'
> > my_http_proxy = '10.x.x.x:8080'
> > proxy = WSDL.Proxy(wsdl, http_proxy=my_http_proxy)
> > res = proxy.myService( myparam='...' )
> > What I get is that connection reaches timeout since the server doesnt
> > see me coming from the right proxy.
> > First problem, I can't see where I can put my proxy authentication
> > username and password.
> > Second, when I will be able to pass through the right proxy, I need to
> > authenticate on the server via http through my credential.
> Have you looked at the URLopener class?
At the end what I did is to use the authentication components offered
Just I had to hand write the SOAP message outcoming, losing the chance
to use SOAPpy.
Anyway it seems to work this way,
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