Apple

I understand how WPAD is supposed to work, getting the IP of the wpad.dat via DHCP or DNS, etc.

But WPAD is used when there is no proxy info set in the client, so not sure what you mean about the system proxy dictionary containing a PAC URL if one was set in my case.

Are you saying that the MAC does WPAD and there is somewhere to lookup the result of the IP of where to find wpad.dat?

Or do I have to do the DHCP/DNS stuff myself to find the IP?

I have been using CFProxySupport APIs to get any manually configured settings whether PAC file or IP/port of the proxy.

Thanks

alf

From: Mark Pauley [mailto:email@hidden]
Sent: Tuesday, August 19, 2008 6:05 PM
To: Alfred J. Eisenberg
Cc: email@hidden
Subject: Re: CFProxySupport APIs and WPAD?

We're aware of this issue.

In the meantime, you can take a look at <CFNetwork/CFProxySupport.h> and the CFNetworkExecuteProxyAutoConfigurationURL API. WPAD is just some DNS / DHCP foobage to get the name of the PAC url. I recommend that you use the System Configuration API for getting the system proxy dictionary which will contain the PAC URL if any is set.

On Aug 19, 2008, at 1:12 PM, Alfred J. Eisenberg wrote:

I’m not sure if I’m missing something somewhere or not, but does the concept of Web Proxy Automatic Discovery exist in the Mac environment? A lot of corporate networks use this feature for PCs to locate pac files with no configuration on the client/browser, but I don’t find a setting or API for it on the Mac.

Any ideas/pointers other than implementing it ourselves in our application?

Thanks

alf

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References:
	>CFProxySupport APIs and WPAD? (From: "Alfred J. Eisenberg" <email@hidden>)
	>Re: CFProxySupport APIs and WPAD? (From: Mark Pauley <email@hidden>)