| Re: Generating "download" pages [message #186402 is a reply to message #186400] |
Sat, 19 July 2014 15:38   |
Lew Pitcher
Messages: 60
Registered: April 2013
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Member |
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Thanks for the response, Thomas.
Next time, please contain your snark. It ill suits you.
On Friday 18 July 2014 11:39, in comp.lang.php, "Thomas 'PointedEars' Lahn"
<PointedEars(at)web(dot)de> wrote:
> Lew Pitcher wrote:
>
>> On response to a trigger on one web page, I want to be able to generate
>> and display a new web page, /and/ at the same time, send an associated
>> file as a download.
>>
>> The user selects (in this case) "Export recipes" (I'm developing a
>> PHP/MySQL recipe management application), which causes
>> 1) the page to change to a "Download in progress" page, and
>> 2) a file (in this case, an XML file containing the recipes) to be sent
>> to the client.
>>
>> Is this doable?
>
> Yes. There are plenty of productive examples on the Web, for example when
> you download from sourceforge.net and use the additional download link
> (client-side scripting will trigger the download dialog automatically, but
> you can cancel that)
I can, by viewing the source of web pages that use multiple javascript files
with intentionally convoluted logic, and filtering out (in a masterly way)
all that extraneous stuff, find that the web page in question (such as the
download page for a sourceforge project) does *not* include the "server
side" logic that does this. I can /then/ examine the headers from such a
working page, *deduce* that the page sent both html
and "Content-Disposition" (etc.) headers, and *assume* the method of
generating such.
Indeed, this is how I've done it in the past, with poor results.
>> How do I do this with PHP?
>
> There are several ways. Another is:
And, the first was?
>
> <?php
> header('Content-Disposition: attachment; filename="foo.bar"'); …
> header('Location: http://download.example/foo.bar');
> ?>
>
> displayed content
>
> This not just a (PHP) language feature, it is using a language-independent
> HTTP feature.
But, to set headers, you need some sort of active language. Mine is PHP..
> You can use browser developer tools to inspect the HTTP
> response headers, then use the corresponding PHP functions to achieve the
> same.
Or, I can ask in a forum that specializes in such programming, and save
myself the blind alleys, false starts, and mis-assumptions that such an
inspection of the outside effects would bring
[snip suggested tools]
>
> Next time, do your homework, please.
Condescending, no?
In fact, I've done my homework. And *this* is part of that homework.
Thomas, either be helpful or don't reply. Such snark is not helpful.
--
Lew Pitcher
"In Skills, We Trust"
PGP public key available upon request
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