Hi Daniel,
Thanks for your response,
I have tried all following option and it doesn't seems to work for me.
//pHeader=curl_slist_append(pHeader,"Pragma: no-cache");
// Option 1
pHeader=curl_slist_append(pHeader,"Cache-Control: no-cache");
// Option 2
//pHeader=curl_slist_append(pHeader,"Cache-Control:
must-revalidate"); // Option 3
//pHeader=curl_slist_append(pHeader,"Cache-Control:
max-age=0"); // Option 4
//pHeader=curl_slist_append(pHeader,"Expires: Thu, 01 Dec 1994
16:00:00 GMT"); // Option 5
curl_easy_setopt(handle,CURLOPT_HTTPHEADER,pHeader);
First Attempt : Tried only option 1
Second Attempt : Tried option 1 + Option 2
Third Attempt : Tried option 1 + Option 2 + Option 5
Fourth Attempt : Tried only option 3
fifth Attempt : Tried only option 4
but none of these seems to have worked ,
I saw one more post http://curl.haxx.se/mail/lib-2005-04/0022.html
But it seems I have already tried all these options.
I have monitored my network traffic using the "Microsoft Network Monitor 3.4"
And I see the http request packet ,
ProtocolVersion is HTTP/1.1
and there then I see all the headers that I have set Pragma, ChacheControl,
Expires etc.
since ProtocolVersion is HHTP/1.1 ChacheControl should have worked ideally
isn't it?
Is there anything that I am still missing.
-Arif
------------------------------
Message: 2
Date: Wed, 11 Jan 2012 13:56:28 +0100 (CET)
From: Daniel Stenberg <[email protected]>
To: libcurl development <[email protected]>
Subject: Re: Query regarding the caching problem faced with curl
7.19.3, how to disable cache usage ?
Message-ID: <[email protected]>
Content-Type: TEXT/PLAIN; format=flowed; charset=US-ASCII
On Wed, 11 Jan 2012, Arif Ali Saiyed wrote:
> my problem is even after the file is being updated on web server, It's
> still downloading the cached copy of it.
This is not due to any caching done by curl though, as curl has no caching of
contents at all - ever.
> after some search I found that there is something called "Pragma:nochache"
> header, but I am not sure how to use this ? there is no
> curl_easy_setopt for doing this.
You insert that header into a request by yourself with CURLOPT_HTTPHEADER. See
http://curl.haxx.se/libcurl/c/curl_easy_setopt.html#CURLOPTHTTPHEADER
--
/ daniel.haxx.se
----------------------------------------------------------------------
Message: 1
Date: Wed, 11 Jan 2012 18:10:31 +0530
From: Arif Ali Saiyed <[email protected]>
To: "[email protected]" <[email protected]>,
"[email protected]" <[email protected]>
Subject: Query regarding the caching problem faced with curl 7.19.3,
how to disable cache usage ?
Message-ID:
<b815c26f687d26448a336840033924ed4203329...@indiambx01.corp.adobe.com>
Content-Type: text/plain; charset="us-ascii"
Hi There,
I am using curl 7.19.3 in my C++ code.
My code fetches some http file, my problem is even after the file is being
updated on web server, It's still downloading the cached copy of it.
I want to know how to disable this behavior I have tried following easy set
option but it did not work me
curl_easy_setopt(handle, CURLOPT_FRESH_CONNECT, 1); // I
guess this has got nothing to do with cache but still I tried and it did not
help
curl_easy_setopt(handle, CURLOPT_FORBID_REUSE, 1); // I
guess this has got nothing to do with cache but still I tried and it did not
help
curl_easy_setopt(handle, CURLOPT_SSL_SESSIONID_CACHE, 0); // I
guess this has got nothing to do with cache but still I tried and it did not
help
after some search I found that there is something called "Pragma:nochache"
header, but I am not sure how to use this ? there is no curl_easy_setopt for
doing this.
Though its not needed following is the codesnippet of how I am using curl
CURL* handle = curl_easy_init();
CURLcode err = CURLE_READ_ERROR;
if(handle)
{
currentStatus = kInitiated;
curl_easy_setopt(handle, CURLOPT_URL, myFileName);
curl_easy_setopt(handle, CURLOPT_WRITEFUNCTION,
my_write_data_handler);
err = curl_easy_perform(handle);
curl_easy_cleanup(handle);
curl_global_cleanup();
currentStatus = kCompleted;
}
-asaiyed
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