Re: [MacPerl-WebCGI] Disabling caching of output?

[Riccardo Perotti <perotti@pobox.com>]

Thanks Bruce, but no, my IE still caches the first image and displays that
one while (instead of?) waiting for the other one.

Any other idea?

Riccardo
--
mailto:perotti@pobox.com
http://riccardoperotti.com


> From: Bruce Van Allen <bva@cruzio.com>
> Reply-To: Bruce Van Allen <bva@cruzio.com>
> Date: Fri, 29 Dec 2000 17:17:47 -0800
> To: <macperl-webcgi@macperl.org>
> Subject: Re: [MacPerl-WebCGI] Disabling caching of output?
> 
> At 7:49 PM 12/29/00, Riccardo Perotti wrote:
> [snip]
>> The problem is that once you have downloaded one image and choose another
>> one, the browser displays the first outputted image from its cache instead
>> of waiting for the script to send the new one. I've tried to disable caching
>> of the outputted image by means of http headers, but it's just not working.
>> 
>> I'm enclosing the code of the sub that does the actual outputting.
>> Any suggestions would be greatly appreciated.
>> 
>> 
>> -----snippet----
>> 
>> sub display_img {
>> my $img = shift;
>> my $buffer = '';
>> my $buffer_size = 4_096;  # Is this a good buffer size?
>> 
>> open (IMAGE, "$img");
>> print $q->header( -type => 'image/jpeg',
>> -expires => '-1d',
>> 'Pragma: no-cache');  ## Using CGI !
>> binmode STDOUT;
>> while ( read(IMAGE, $buffer, $buffer_size) ) {
>> print $buffer;
>> }
>> close (IMAGE);
>> }
> 
> Have you tried it this way?
> 
> print $q->header( -type    => 'image/jpeg',
>                                   -expires => '-1d',
>                                   -pragma  => 'no-cache');
> 
> HTH
> 
> 1;
> 
> - Bruce
> 
> __Bruce_Van_Allen___Santa_Cruz_CA__
> 
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