Re: [Virtuoso-users] Virtuoso as pass-thru HTTP Proxy

Thu, 24 Sep 2009 12:37:19 +0000 

Aldo,

On 19 Sep 2009, at 22:02, Aldo Bucchi wrote:


Hi,
On Sep 17, 2009, at 20:53, Hugh Williams <hwilli...@openlinksw.com> wrote: 


Aldo,
On 17 Sep 2009, at 08:16, Aldo Bucchi wrote:


Hugh,
On Wed, Sep 16, 2009 at 5:37 PM, Hugh Williams <hwilli...@openlinksw.com > wrote: 
Hi Aldo,
You should be able to create a URL rewrite rule to peform this pass-thru as 
detailed at:


http://docs.openlinksw.com/virtuoso/rdfiridereferencing.html#urlrewriteruleconductor

Note Virtuoso also has a http_proxy function as detailed at:

     http://docs.openlinksw.com/virtuoso/fn_http_proxy.html


Thanks, I managed to create one using the http_proxy function and a
one liner VSP.

However, my attempts at creating a URL Rewrite rule did not work if
the host/authority piece of the rewritten URL is different than the
original. Is this possible?
[Hugh] Note sure what you mean by host/authority piece, are you creating the rewrite rule via the Conductor or manually by hand using the functions ? If the latter can provide details of the calls being made ? 

[Aldo] I mean the domain of the URL.
For example:

Original URL:
http://myvirtuoso.com/foo/cars

Target URL:
http://bar.com/baz?q=cars

Where the second domain is hosted in a separate, unrelated machine.

I am using conductor UI, but currently on my phone;)
[Hugh] Ok, you could try to making a proxy virtual directory as detailed at: 

        http://docs.openlinksw.com/virtuoso/webserver.html#virtproxy
where physical path is the destination (http://bar.com/baz) and the logical is /baz. Then make a url rewrite rule which works on the logical path /foo and in the rule /foo/(.*) compose an internal redirect to /baz?q=$1, which should result in: 

1. Requests to /foo/cars will be redirected to /baz?q=cars
2. /baz will send requests to baz.com where it will get /baz?q=cars

I hope this works for you ...

Regards
Hugh





Regards
Hugh



Regards,
A



Best Regards
Hugh Williams
Professional Services
OpenLink Software
Web: http://www.openlinksw.com
Support: http://support.openlinksw.com
Forums: http://boards.openlinksw.com/support



On 16 Sep 2009, at 20:38, Aldo Bucchi wrote:


Hi,
I would like to use Virtuoso as a transparent, pass-thru HTTP proxy 
that works like follows:

http://myvirtuosoinstance.com/httpproxy?url=http%3A%2F%2Ffoo.com%2Fbar

and ends up calling

http://foo.com/bar
under the covers via Virtuoso HTTP Client, transferring unmodified raw 
data ( can be of any mime type ).

What's the simplest way to achieve this?
Can it be achieved with just a rule?

No need for authentication, etc. Just plain GETs for now.

Regards,
A

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http://aldobucchi.com/

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