Re: [squid-users] pac and dat woes

David Gameau wrote:
>> -----Original Message-----
>> From: Adrian Chadd [mailto:adrian@creative.net.au]
>>
>> On Fri, May 11, 2007, David Gameau wrote:
>>>> I've made WPAD work but I've not made it work with a DHCP
>>>> configuration. I've done mine with DNS.
>>>>
>>>> Does anyone here have an example of a WPAD+DHCP
>>>> configuration? If so I'd like to talk to you and document
>>>> it on the Wiki.
>>>>
>>> Here's what we use to support WPAD+DHCP:
>>> [From dhcpd.conf, in the global section of the file]
>>> option option-252 code 252 = text;
>>> option option-252 "http://wpad.example.com/wpad.dat\n";
>>>
>>> Note that IE6 truncates the answer it gets (by dropping the
>>> last character), which is why you need to include something
>>> like '\n'.
>>>
>>> I'm not sure whether Firefox supports DHCP for its autodiscovery.
>> Hm! How interesting. Do you have any tech references for that IE6
>> WPAD behaviour?
>>
>> Adrian
>>
> I can't find the singular authoritative source for the problem.
> However, this is probably the best explanation I could find.
> [from
> http://homepages.tesco.net/J.deBoynePollard/FGA/web-browser-auto-proxy-c
> onfiguration.html]
>
> "One caveat: Microsoft's Internet Explorer version 6.01 expects the
> string in option 252 to be NUL-terminated. As such, it
> unconditionally
> strips off the final octet of the string before using it. Earlier
> versions
> of Microsoft's Internet Explorer do not do this. To satisfy all
> versions,
> simply explicitly include a NUL as the last octet of the string."
>

I can't find any notes for it in my configs but I'm sure I recall
finding something even more devious than a single-octet truncation being
done. My memories are of finding it would truncate "proxy.pac" =>
"proxy.pa" and others like "2007-proxy.pac" => "2007-pro"

Amos
Received on Fri May 11 2007 - 00:17:53 MDT