Call Web Service using proxy and http authentication
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? Thanks very much for your help, totobe -- http://mail.python.org/mailman/listinfo/python-list
Re: Call Web Service using proxy and http authentication
On May 12, 8:38 pm, Steve Howell wrote: > On May 12, 8:59 am, wdveloper 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. I am starting wondering whether python+SOAPpy is the right solution or I need to switch to other solutions (zsi?). I hope I've been more detailed now and my situation sounds little more clear. Thanks again for your precious help! -- http://mail.python.org/mailman/listinfo/python-list
Re: Call Web Service using proxy and http authentication
On May 13, 5:26 pm, Steve Howell wrote: > On May 12, 12:51 pm, wdveloper wrote: > > > > > On May 12, 8:38 pm, Steve Howell wrote: > > > > On May 12, 8:59 am, wdveloper 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 by urllib2. Just I had to hand write the SOAP message outcoming, losing the chance to use SOAPpy. Anyway it seems to work this way, thanks again -- http://mail.python.org/mailman/listinfo/python-list
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