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download and continue

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Jon Paynter-2

download and continue

Im trying to setup my application to provide a download link to a generated file, and then continue with the application flow after the user clicks the download link. My application generates a script file, then provides a download link. When the user clicks on the download link, it has to record that the download happened, and then exit the script generation component.

I have the following method:

downloadScript
    self markAsApplied.
    self requestContext respond: [ : response |
        response contentType: 'text/plain';
        attachmentWithFileName: 'EMS.conf';
        nextPutAll: self generatedScript.
    ].

Which marks as applied, and causes the browser to download the file. But I afterwards I need to call: "self answer: true" so the component will exit.
just adding: "self answer: true" at the end of the method doesnt work.

I found WARequestContext>>respondAndContinue: but that did not work -- the block argument is a url instead of the response object

How do I resume processing after doing a download?

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mmimica

Re: download and continue

Jon Paynter wrote:
> Which marks as applied, and causes the browser to download the file.
> But I afterwards I need to call: "self answer: true" so the component
> will exit.
> just adding: "self answer: true" at the end of the method doesnt work.

I asked the very same question not a while ago. The show answer is: you
can't. HTTP server can answer the client with only one response, either
a file download or a next HTML page. Its a design issue.
You could come up with some javascript that redirects shortly after the
download has started but personally, I like to keep things as they were
designed to work.

--
Milan Mimica
http://sparklet.sf.net

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carlo.t

RE: download and continue

In reply to this post by Jon Paynter-2

My Seaside is rusty but why can't you try:

html anchor
document: file contents
mimeType: file contentType
fileName: file fileName ;
callback: [self answer: true];
text: file fileName.

where file is a WAFile object e.g.
WAFile new
contents: multiStream contents ;
fileName: self action , '_RESPONSE.zip' ;
contentType: 'application/zip'

----------------------------------------------------------------------

Message: 1
Date: Tue, 26 Jul 2011 11:15:23 -0700
From: Jon Paynter <[hidden email]>
Subject: [Seaside] download and continue
To: [hidden email]
Message-ID:
<[hidden email]>
Content-Type: text/plain; charset="iso-8859-1"

Im trying to setup my application to provide a download link to a generated
file, and then continue with the application flow after the user clicks the
download link. My application generates a script file, then provides a
download link. When the user clicks on the download link, it has to record
that the download happened, and then exit the script generation component.

I have the following method:

downloadScript
self markAsApplied.
self requestContext respond: [ : response |
response contentType: 'text/plain';
attachmentWithFileName: 'EMS.conf';
nextPutAll: self generatedScript.
].

Which marks as applied, and causes the browser to download the file. But I
afterwards I need to call: "self answer: true" so the component will exit.
just adding: "self answer: true" at the end of the method doesnt work.

I found WARequestContext>>respondAndContinue: but that did not work -- the
block argument is a url instead of the response object

How do I resume processing after doing a download?
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Julian Fitzell-2

Re: download and continue

Both #document:mimeType:fileName: and #callback: set the href
attribute of the anchor, so one will override, the other.

As I responded to the earlier thread about this question, there are
ways of removing the called component prior to responding with the
document, but HTTP only allows for a single response per request.
Either you return an HTML page or you return a document; you can't
return both. To work around that you'd have to play tricks with
automatic refresh, iframes, javascript or the like.

Julian

On Wed, Jul 27, 2011 at 9:59 AM, Carlo <[hidden email]> wrote:

>
> My Seaside is rusty but why can't you try:
>
> html anchor
> document: file contents
> mimeType: file contentType
> fileName: file fileName ;
> callback: [self answer: true];
> text: file fileName.
>
> where file is a WAFile object e.g.
> WAFile new
> contents: multiStream contents ;
> fileName: self action , '_RESPONSE.zip' ;
> contentType: 'application/zip'
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Tue, 26 Jul 2011 11:15:23 -0700
> From: Jon Paynter <[hidden email]>
> Subject: [Seaside] download and continue
> To: [hidden email]
> Message-ID:
> <[hidden email]>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Im trying to setup my application to provide a download link to a generated
> file, and then continue with the application flow after the user clicks the
> download link. My application generates a script file, then provides a
> download link. When the user clicks on the download link, it has to record
> that the download happened, and then exit the script generation component.
>
> I have the following method:
>
> downloadScript
> self markAsApplied.
> self requestContext respond: [ : response |
> response contentType: 'text/plain';
> attachmentWithFileName: 'EMS.conf';
> nextPutAll: self generatedScript.
> ].
>
> Which marks as applied, and causes the browser to download the file. But I
> afterwards I need to call: "self answer: true" so the component will exit.
> just adding: "self answer: true" at the end of the method doesnt work.
>
> I found WARequestContext>>respondAndContinue: but that did not work -- the
> block argument is a url instead of the response object
>
> How do I resume processing after doing a download?
> -------------- next part --------------
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> URL: http://lists.squeakfoundation.org/pipermail/seaside/attachments/20110726/67b44e54/attachment-0001.htm
>
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>
>
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>

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