Re: Historic Curiosity Question: Websites in QSYS.LIB

Very well explained. The "<img src" often points to a file containing the
image, but in this case it points to a program that reads the image from a
blob in a table and sends it to the browser.

On Fri, Aug 18, 2023 at 10:14 AM VERNON HAMBERG Owner via MIDRANGE-L <
midrange-l@xxxxxxxxxxxxxxxxxx> wrote:

Hi Patrik


The code is definitely using CGIDEV2 - documentation for it is at
easy400.net - Googling for WrtNoSection gets you close - what that does
is write a block of bytes to a buffer, as described here -


WrtNoSection writes data without using a section name and without
performing variable substitution.
This subprocedure can be used when a large block of data is to be written.
This is more likely to happen when writing non-textual data such as images.
WrtNoSection's input parameters are the address of the data to be written
and the number of bytes to write.
In order to maximize performance, data are written into a dynamically
allocated buffer and are not sent to standard output until the user writes
the fictitious *fini section.<img src> is an HTML tag that contains the URL
for where the image is located, usually.


show_foto seems to be the program called from the Apache web server on the
IBM i.


That's about as much as I can get quickly this morning - have to get back
to work!


Cheers
Vern


On Fri, 18 Aug, 2023 at 4:04 AM, Patrik Schindler <poc@xxxxxxxxxx> wrote:


To: midrange systems technical discussion

Hello Raul,

Am 18.08.2023 um 01:20 schrieb Raul Alberto Jager Weiler <
raul.jager@xxxxxxxxx<mailto:raul.jager@xxxxxxxxx>>:

It is easy to store images in blob, and display them in the web. You can
find an example here:

https://docs.google.com/document/d/1pOIwR8os6zczzILUxxLlj_1Bvggf-XLUrtoW5U077bw/edit?pli=1#heading=h.f3wrturc4h2v

The comments are in spanish, Google can translate. There are two

programs,

one to load the other to display.

Thanks. I'm not fluent with free form RPG, so I need to guess things. Do I
understand correctly, <img src> is referring to a CGI script which in turn
loads the picture from the database field through SQL?

I admit failing to grok what show_foto does. WrtNoSection seems to be some
function of CGIdev2, outputting a header and the data (binary?) to stdout?

Maybe I want to look for generic information about "inline images" in HTML
pages? At least this is what I guess this example does.

:wq! PoC

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