Re: Is IWS useful for consuming json data with RPG?

Hi,

Just to clarify. The IWS server piece allows the automatic mapping of
JSON/XML to program parameters. The ILE program does not need to know
anything about XML or JSON.

The IWS client piece, as it relates to REST, allows you to send
user-defined payloads such as XML or JSON, but the burden of generating
and parsing the payloads is up to the client application.

So yes, you can use the IWS client to consume services, and it is as easy
as any other mechanism as far as the sending and receiving payloads.


"WEB400" <web400-bounces@xxxxxxxxxxxxxxxxxx> wrote on 11/04/2019 01:12:35
PM:

From: Peter Dow <petercdow@xxxxxxxxx>
To: web400@xxxxxxxxxxxxxxxxxx
Date: 11/04/2019 01:12 PM
Subject: [EXTERNAL] Re: [WEB400] Is IWS useful for consuming json
data with RPG?
Sent by: "WEB400" <web400-bounces@xxxxxxxxxxxxxxxxxx>

IWS accepts JSON or XML and parses it into the parameters you specified
when creating the web service client. When configuring IWS, you can tell

it to accept only one or the other (JSON or XML) or both. It's
transparent to the procedure that's processing the request -- either one

ends up in the parms you specified.

And when sending a response, IWS takes the parms from your service
program and formats them in either JSON or XML and sends it to the
requester.

But it does not provide any procedures for you to use in your program to

parse JSON or XML.

On 11/3/2019 12:31 AM, Jon Paris wrote:

To add to Vern's comment. The role IWS plays is in this area is

acting as a web service client. It has no inherent JSON consumption
capability (unless they've snuck that in and I didn't notice). What
it provides is the equivalent to Scott's HTTPAPI and personally I
think it is fair more complicated and less flexible than Scott's
ap[proach. I'm using IWS more as a provider of web services, but
still don't use it for consuming.

As Vern notes, YAJLINTO with DATA-INTO is a great tool. Or for

situations where that doesn't fit then just the "raw" YAJL APIs.

On Nov 2, 2019, at 11:19 PM, Vernon Hamberg

<vhamberg@xxxxxxxxxxxxxxx> wrote:

Booth - it might depend on how you will use IWS - do you mean to

consume a web service in your RPG program?

Even if it can be used, it is probably like using a bulldozer or

steam shovel to plant tulips.

I have 2 recommendations

- the DATA-INTO op code that is now available, combined with

Scott Klement's YAJL service program

- embedded SQL using the JSON_TABLE function that is similar to

what can be done with XMLTABLE.

I don't remember if JSON_TABLE has the underscore - it might be

JSONTABLE

HTH
Vern

On 11/2/2019 3:31 PM, Booth Martin wrote:

Is IWS useful for consuming json data with RPG? What are

solutions that you believe are useful?

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