Re: Is it possible to send a call to the CGI program without -- WEB400

It's interesting to see how many tangents this thread has taken, and
perhaps a little frustrating. It gets back to terminology. I understand
what Kevin is referring to by "web sockets" for example, which is a W3C
specification, which is beginning to be implemented in browsers, and
REQUIRES communication with a "web socket" server, which is separate from
and much different than an HTTP server. Actually, it would be nice if
mainstream HTTP servers were to implement the web-sockets protocol - but
for now you need to shop elsewhere.

We also went off into speculating about .net in the mix. And "web services"
in the mix, which also appears to be a detour. Daryl attempted to describe
a "button", which when clicked, would post a request to a CGIDEV program,
even though the page containing the button was generated by "a tool on the
AS/400".

So Daryl, can you modify the onClick event of the button to send a request
to a CGIDEV program?

Nathan.

On Fri, Jul 11, 2014 at 6:36 AM, Kevin Turner <
kevin.turner@xxxxxxxxxxxxxxxxxxxx> wrote:

Yes - I mentioned a new window/tag in a later email. You cannot do it
with ajax though - that is subject to the same cross-domain restrictions as
ordinary http requests.

Not wishing to derail the main topic too much, but things like GETURI and
HTTPAPI are not like web sockets at all. They enable a program to make a
request to a server and get a response back. It always has to be initiated
from the client and answered by the server. Web sockets are like normal
socket connections in that once the connection is established, the server
can push data to the client in an unsolicited fashion (no need for the
client to make a request to start it off). A web socket uses a special
protocol - one way that differentiates it from an ordinary by-directional
socket. They have the added benefit of enabling the cross-domain
capability that HTTP (ajax or otherwise) cannot.

The point is probably moot, however. I doubt Darryl is going to want to
invest the time and effort into web-sockets or cURL.

The simple "new tab" option is easiest.

-----Original Message-----
From: WEB400 [mailto:web400-bounces@xxxxxxxxxxxx] On Behalf Of Bradley
Stone
Sent: 11 July 2014 13:18
To: Web Enabling the IBM i (AS/400 and iSeries)
Subject: Re: [WEB400] Is it possible to send a call to the CGI program
without

GETURI is "web sockets" but not something used in HTML or Javascript
(similar to cURL as well). Now, I know web sockets is a term used for a
cURL type request made from HTML. They all do the same thing. Just done
in different places.

I just offered a solution to the problem. Darryl mentioned the data was
from a web service, so that would be easy enough to use a sockets solution
inside of a CGI application.

A hundred ways to do that, (ie, new window, new page, ajax, etc). It all
depends on the skill set and desire.

Brad
www.bvstools.com

On Fri, Jul 11, 2014 at 2:10 AM, Kevin Turner <
kevin.turner@xxxxxxxxxxxxxxxxxxxx> wrote:

What you are suggesting is subtly different Brad. You are talking
about a web service request that is initiated from the server-side
code. That is nothing to do with web sockets. Web sockets are a way
for the browser to have bidirectional ws conversation with a server
that is not necessarily in the same domain as the http server you are
connected to. With web sockets you can also push data to a browser
without it having to have initiated the conversation.

The crux of Darryl's problem is that the web page containing the data
(and
buttons) is being delivered from a different server/domain to the one
he wants to use to action the button click.so you can only do that if
the button is going to navigate away from the original domain.

Sent from my iPad

On 11 Jul 2014, at 01:22, "Bradley Stone" <bvstone@xxxxxxxxx> wrote:

Yep, that's exactly what I suggested.

You have a link on your page (or button, etc) that links to a CGI
(or

eRPG

as I like to call them) program (on your same IBMi server).

Your CGI program calls GETURI to do a sockets/web service request
and gather data from the other system. The data is returned and you
parse

if,

if needed, then the CGI program returns a web page with information
regarding that. Reporting errors, or the data returned, etc.

Done it thousands of times. Fun things for sure! Especially with web
services for virtually everything these days.

Brad
www.bvstools.com

On Thu, Jul 10, 2014 at 6:25 PM, Kevin Turner <
kevin.turner@xxxxxxxxxxxxxxxxxxxx> wrote:

Well put it this way, if you load the page (with the button) from
http://example1.com/somewhere then you cannot have a button that
interacts with http://myiseries.com/somewhereelse and then
continues to work with http://example1.com/somewhere after the
button click action

is

finished. That is the illegal cross-domain request we talked about

earlier.

You can only do that if your button click is going to navigate away
to http://myiseries.com/somewhereelse completely (i.e. waving

goodbye to

http://example1.com/somewhere ) The only way I know of to

circumvent

this is to use web sockets to initiate the request. Without that,

the

domain that delivers the list of data and the button(s) must be the
same domain as the one that processes the button request.

Clear as mud I guess...

-----Original Message-----
From: WEB400 [mailto:web400-bounces@xxxxxxxxxxxx] On Behalf Of
Darryl Freinkel
Sent: 10 July 2014 20:44
To: web400@xxxxxxxxxxxx
Subject: [WEB400] Is it possible to send a call to the CGI program

without

Let me try and clarify this a little more.

Firstly thanks for the comments.

We use a reporting tool on the AS/400 that displays data only. In
this instance, there is a list of programs that need permission to
be

promoted

into production. The manager will display the list on her screen,
iPad

or

cell phone and if she approves it, she will select an approve
button,

which

should then call something like a web service to process the approval.

The

button will do a "call" to a CGI program to update the new status.
It

would

at that point return a confirmation screen from CGIDEV.

Darryl Freinkel

Assignment 400 Group, Inc.

Tel: 770.321.8562 ext 111 | Fax 770.321.8562 | 2247 La Salle Dr,

Marietta

GA, 30062, USA | PO Box 72556, Marietta, GA 30007-2556

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