Web browser developer?

[ChrisChong]

Hi all

Would anyone happen to know of a web browser developer? We've an issue that seems to be linked to the caching component of the web browser, and would love to seek some advice.

Cheers

Chris

[Martin Bähr]

which web browser?
these things tend to be browser specific.

greetings, martin.
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[ChrisChong]

That's the darnest thing - this one doesn't seem to be. It's failed on various browsers at different times, and isn't always an issue that can be replicated. 

/Chris

Martin B�hr          http://societyserver.org/mbaehr/      

[Jeffrey 'jf' Lim]

On Mon, Oct 1, 2012 at 4:58 PM, ChrisChong <chris.ch...@gmail.com> wrote:
> That's the darnest thing - this one doesn't seem to be. It's failed on
> various browsers at different times, and isn't always an issue that can be
> replicated.
>

and u're sure this is nothing in between? caches, proxies, etc. etc.

-jf

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only shows himself to be a fool.

"Every nonfree program has a lord, a master --
and if you use the program, he is your master."
--Richard Stallman

[ChrisChong]

we think it might be a caching rule somewhere that causes this.. but let me get one of my guys who's been looking into this to write up a proper description of the problem maybe.. it might be easier that way.

/Chris

[Benjamin Scherrey]

Singapore has a very nasty caching proxy for non-commercial connections that has impacted clients many times even when accessing EC2 in Singapore. You definitely have to be explicit in your caching policy on any web services you deploy.

  -- Ben

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[Stefan van der Bijl]

I'll second that. When I have these errors I bypass I always check myself by using a VPN service like Witopia.

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[Gideon Simons]

Caching problems are always a pain to debug and as Stephan and Benjamin have mentioned they are usually on the ISP side.

If clearing the cache and cookies in the browser doesn't get you the new content then its most likely the ISP.

While caching can be a good thing in most cases, there are a few tricks to force fresh content.

I would start with the most fool proof one which is to add a random parameter (such as a timestamp) to the http calls you are making.

Gideon

Gideon

[Stefan van der Bijl]

Oh one more fun thing I've come across, and it may be related to the "great Singapore proxy" ...

If your server is based outside Singapore and you are browsing from inside Singapore, and you establish session security dependent on initial client IP 1 (for example to prevent replay attacks), be aware that a subsequent request from the same browser session as seen server-side may appear to originate from a different IP address 2, even if the IP with your ISP has not changed. Can't say how often this happens, I've just seen it happen, and it's aggravating. When my server is abroad I will usually VPN to avoid wasting time!

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[Jeffrey 'jf' Lim]

On 4 Oct 2012 08:23, "Stefan van der Bijl" <ste...@valdebrain.com> wrote:
>
> Oh one more fun thing I've come across, and it may be related to the "great Singapore proxy" ...
>

I'd like to question this "great Singapore proxy" statement. Really? As opposed to merely ISP-specific proxies? Because I can definitely tell u that the ISPs have their own proxies....

-jf

[Stefan van der Bijl]

Thanks for pointing it out. Since I use Starhub, I guess it could be Starhub's proxies. Never quite understood where proxy ownership lied, but now I understand that IDA requires every ISP to use a proxy.