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From "Giovanni Donelli" <giovanni.done...@gmail.com>
Subject Re: mod_proxy chaining with a .pac file - OFF-TOPIC?
Date Wed, 23 Jan 2008 17:45:12 GMT
I am trying to make Apache follow the same rules as the browser

On Jan 23, 2008 2:34 PM, Joe Lewis <joe@joe-lewis.com> wrote:

> Giovanni Donelli wrote:
> > Take this pac file:
> > $ curl http://wpad.wws.lan/wpad.dat
> > function FindProxyForURL(url, host)
> > {
> >     // simple hostname
> >     if (dnsDomainLevels(host) == 0) {return "DIRECT";}
> >
> >     // match Host against local domains (w/ optional :port)
> >     var dom = /(127\.\d+\.\d+\.\d+|\.wws\.lan\.?|\.local\.?)(:\d+)?/;
> >     if(dom.test(host)) { return "DIRECT"; }
> >
> >     // All other requests go through port 8080 of proxy
> >     // should that fail to respond, go direct:
> >     return "PROXY proxy.wws.lan:8080; DIRECT";
> > }
> >
> > Obviously the browser needs to evaluate the URL each time it wants to
> make
> > an http request. So I want to do that in my proxy.
> >
> > Currently proxy chaning in mod_proxy supports only say:
> > ProxyRemote * x.y.z.w
> >
> > Now not having found mod_proxy can help me in that, I thought about
> writing
> > a mod that in apache would interpret a pac file. In my configuration,
> the
> > browser can not be aware of the pac file, only my proxy.
> >
> > I tried to explain you what was my project doing, instead of asking how
> > override the connection to a server.
> >
> > if this is not a subject of interest of this group, I do apologize for
> > having misunderstood the aim of it. However I still don't understand why
> > this should be offtopic.
> >
> > Giovanni
> >
> > PS: I couldn't figure out a way to search into archives from
> > http://mail-archives.apache.org/mod_mbox/httpd-modules-dev/. I used
> google
> > "site:" option, and found no entry for "pac" or wpad.
> >
> >
> >
> > On Jan 22, 2008 6:20 PM, Joe Lewis <joe@joe-lewis.com> wrote:
> >
> >
> >> First, I want to apologize for keeping this off-topic conversation one
> >> last time on the mailing list.  I think if we allow this to be
> archived,
> >> any questions should be more easily answered using archives, hopefully
> >> reducing our work load.
> >>
> >>
> >> Giovanni Donelli wrote:
> >>
> >>> Hi
> >>>    Thanks for your reply. I do apologize for not being clear. I will
> >>> try to restate what I want to achieve. For the sake of this discussion
> >>> allow me to simplify the browser/internet interaction as follows:
> >>>
> >>> User enters URL in browser ->  **browser resolves domain name** ->
> >>> connect to server x -> HTTP request....
> >>>
> >>> In the way the browser **resolves** the DNS is where the pac file is
> >>>
> >> used.
> >>
> >> You may want to read and understand the specification first.  Remember
> >> that browsers do not reconfigure each time a page is hit - they obtain
> >> the configuration once (via a direct URL to a .pac, a DHCP response, or
> >> a DNS lookup for a wpad hostname - it's in the spec).
> >>
> >> The only time in those activities that apache could be involved is in
> >> the direct URL to a .pac file - and it's a static .pac file you drop on
> >> the web server, or serve the proxy.dat file that the DHCP specified or
> >> the DNS method is trying to find.  In any way, nothing according to
> >> apache is occurring that is dynamic - it's just serving a .pac or .dat
> >> file.
> >>
> >> Which means there is no need to set up an apache module that handles
> >> stuff like this unless you are really crazy and want to construct a
> >> dynamically generated .pac/.dat file (I would not suggest this).
> >>
> >> If that is the direction you want to go, we may be able to assist -
> >> however, I doubt that is what you want.  Most proxy servers have static
> >> IP addresses, which means the .pac/.dat file should be static as well.
> >>
> >> Once again, may apologies to those who are expecting module development
> >> assistance in this as we're not sure we even need it yet.
> >>
> >> Joe
> >> --
> >> Joseph Lewis <http://sharktooth.org/>
> >> "Divide the fire, and you will sooner put it out." - Publius Syrus
> >>
> >>
> >
> >
> Are you trying to make Apache follow the same rules as the browser when
> it proxies (as in a proxy that uses a proxy), or just trying to set it
> up?  (as in double proxy)?
>
> Joe
> --
> Joseph Lewis <http://sharktooth.org/>
> "Divide the fire, and you will sooner put it out." - Publius Syrus
>

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