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From Adam Prime <adam.pr...@utoronto.ca>
Subject Re: Download then display page
Date Tue, 30 Apr 2013 18:54:41 GMT
I think people still generally rely on meta redirects or javascript to 
accomplish this type of behaviour, though I'm curious to know if what 
you describe here actually works across browsers.

Adam


On 13-04-30 02:27 PM, Jim Schueler wrote:
> Yes, that's what I have in mind.  I only occassionally write headers.
> But I envision something similar to what you've got below:
>
>    $redirect = ... ;    ## URL to the spreadsheet
>
>    $r->content_type('text/html') ;
>    $r->headers_out->set( Location => $redirect ) ;
>    $r->send_http_header ;
>
>    $r->print( $content->output ) ;
>    return Apache2::Const::REDIRECT ;
>
> Originally, I wondered about using a "multipart/mixed" response type.
> I've never heard that any browser supports such a thing.  Although that
> seems like a more elegant solution.
>
>   -Jim
>
> On Tue, 30 Apr 2013, Chris Faust wrote:
>
>>>> But the response should be a redirect to a URL that returns the
>> spreadsheet instead of a 200 OK.  I believe that the body of the original
>> response will be displayed until the redirect succeeds.
>>
>> I'm not sure what I follow you, something like this?
>>
>> $r->content_type('text/html');
>> print $content->output;
>> $r->headers_out->set(Location => $redirect);
>> return Apache2::Const::REDIRECT;
>>
>> And the $redirect URL would then do the sending of the file itself?
>>
>> Thanks!
>>
>>
>> -----Original Message-----
>> From: Jim Schueler [mailto:jschueler@eloquency.com]
>> Sent: Tuesday, April 30, 2013 1:53 PM
>> To: Chris Faust
>> Cc: modperl@perl.apache.org
>> Subject: Re: Download then display page
>>
>> I believe the following will work  (never tried it though):
>>
>> The request should return a 'text/html' type document that displays the
>> instructions.  But the response should be a redirect to a URL that
>> returns
>> the spreadsheet instead of a 200 OK.  I believe that the body of the
>> original response will be displayed until the redirect succeeds.
>>
>> In the old days, we performed this trick by using meta tag equivalents of
>> the response headers.  And I expect browsers will respond to actual HTTP
>> headers the same way.  I say "the old days" because for last 18 years,
>> I've
>> relied on javascript.  But there may be reasons for not wanting a
>> different
>> type solution.
>>
>>  -Jim
>>
>>
>>
>>
>> On Tue, 30 Apr 2013, Chris Faust wrote:
>>
>>>
>>> Hi,
>>>
>>>
>>>
>>> I'm trying to have a form submission package up the results in a xls
>>> file and then start the download for the user as well as present a
>>> page where they can click on the file if the download has not already
>>> automatically started.
>>>
>>>
>>>
>>> I can do each separately but not both together, I have something like
>> this:
>>>
>>>
>>>
>>> ... Make up our xls file download and put it in $output
>>>
>>>
>>>
>>> $r->content_type('application/xls');
>>>
>>> $r->err_headers_out->add('Content-Disposition' => 'attachment;
>>> filename="'
>> .
>>> $download_name . '"');
>>>
>>> $r->print($output);
>>>
>>> $content->param('set some html template vars....');
>>>
>>> $r->content_type('text/html');
>>>
>>> print $content->output;
>>>
>>>
>>>
>>> When I due the above, then I get prompted for the download but that is
>>> it, I never get the page. Even if I reverse the order and try to do
>>> the page
>>> first:
>>>
>>>
>>>
>>> $r->content_type('text/html');
>>>
>>> print $content->output;
>>>
>>> $r->content_type('application/xls');
>>>
>>> $r->err_headers_out->add('Content-Disposition' => 'attachment;
>>> filename="'
>> .
>>> $download_name . '"');
>>>
>>> $r->print($output);
>>>
>>> $content->param('set some html template vars....');
>>>
>>>
>>>
>>> That still doesn't work. Probably not a mod_perl specific question but
>>> I'm hoping someone can shed some light
>>>
>>>
>>>
>>> TIA!
>>>
>>> -Chris
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>
>>
>>


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