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Re: curl_easy_perform occasionally responds even though the PC is disconnected from the network

From: Frank McGeough <fmcgeough_at_mac.com>
Date: Mon, 20 Sep 2010 13:16:51 -0400

>
> On Mon, Sep 20, 2010 at 9:31 AM, Daniel Stenberg <daniel_at_haxx.se> wrote:
>> On Mon, 20 Sep 2010, Alan Wolfe wrote:
>>
>>> To expand on that, i'm thinking if you are making a request with the same
>>> URL after disconnecting as you made before disconnecting, the response could
>>> be in the cache and so you are getting the same results back.
>>
>> No, they can't.
>>
>> libcurl has no HTML/data cache support so if it gets contents, it gets it
>> over the network.
>>
>> For a more detailed analysis exactly what's going on in Johnny's case, we
>> need detailed info of what actually happens that "once in every 80
>> requests".
>>
>> --
On Sep 20, 2010, at 1:03 PM, Alan Wolfe wrote:
>
> I was thinking of caching happening at the OS level. Is that a possibility?

Anything is possible but there is no o/s that I'm aware of that does that. Its not that it would be that hard to do, its just that 99% of the time it'd make no sense and just add overhead and security issues and it would be a surprising implementation of the socket api. o/s people tend to try and not pull rabbits out of their hats unnecessarily.
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Received on 2010-09-20