Re: Send PDF to Browser

[Jan Grove Vejlstrup <jgv@xxxxxxxx>]

Hello Mark

Thank you very much for your very interesting informations.

Jan

Am 16.06.2016 um 15:15 schrieb Mark S Waterbury:
> Hello, again, Jan:
>
> Sorry, something went very wrong and my e-mail client apparently 
> inserted multiple versions / editions / copies of my reply, and 
> somehow, I did not catch this error before sending my reply. Let me 
> try again...
>
>
> If you are on IBM i 7.1 or newer, you may be able to take advantage of 
> the following enhancements.
>
> IBM i 7.1+ addresses some IFS performance issues.  Search the 
> Knowledge Center for "temporary user defined file system" ... excerpts:
>
>    Temporary user defined file systems
>
>    The integrated file system performs auxiliary storage operations to
>    ensure that files and directories persist across IPLs or crashes of
>    the system. However, many applications use temporary working files
>    and directories that do not need to persist across IPLs of the
>    system. These applications are needlessly slowed down by objects
>    being forced to permanent storage. Users can create and mount a
>    special type of UDFS that contains only temporary objects. Temporary
>    objects do not require any extra auxiliary storage operations
>    because they are automatically deleted by the system when the system
>    is restarted, or when the file system is unmounted.
>
> A temporary UDFS improves performance by reducing or eliminating 
> unnecessary auxiliary storage I/O operations for ephemeral stream files.
>
> Note that the extra I/O operations (to force IFS data to disk) could 
> also have an adverse impact, depending on your DASD I/O configuration.
>
> By defining a "temporary UDFS," you can create an IFS directory that 
> is never written to DASD but remains in memory. Your PDF documents 
> remain "in memory" while your application program logic remain the 
> same, creating the .PDF files in the same way, then reading and 
> sending them to the browser, etc.
>
> Hope this helps,
>
> Mark S. Waterbury
>
> > On 6/16/2016 5:17 AM, Jan Grove Vejlstrup wrote:
> > Hello
> >
> > I create a webservice that receives a document-ID as input and shall 
> > deliver a PDF of the document back to the consumer. I generate a 
> > spooled file of the document and use the attributes wscst(*PDF) and 
> > tostmf of the printer-file to convert the spooled file to a PDF and 
> > store it in the IFS. With my program I read the PDF from the IFS, put 
> > a appropriate header before it and use STDOUT to send it to the 
> > consumer.
> >
> > Is there a way to do this without having to store the PDF temporarily 
> > in the IFS?
> >
> > Best regards
> >
> > Jan