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  1.  Home
  2. RPG400-L
  3. January 2024

RE: External RE: Base64Decode

Scott

Thank you for the great explanation.

This is my first time working with Base64 data. LOTS for me to learn.

-----Original Message-----
From: RPG400-L <rpg400-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of Scott Klement
Sent: Wednesday, January 17, 2024 4:18 PM
To: rpg400-l@xxxxxxxxxxxxxxxxxx
Subject: Re: External RE: Base64Decode

Jerry,

Your first mistake, I think, was not checking for errors after the SQL statement. If you had done it like this:

exec sql values QSys2.Base64_DeCode(:Base64String) Into :DecodedLabel; if %subst(Sqlstt:1:2) <> '00';
// error handling here
endif;

You would've seen right away that the statement was getting an error. Then, you could've looked in the job log and you would've seen this message:

SQL0303 Variable DECODEDLABEL not compatible or value too long.

So DecodedLabel -- the return value from Base64_Decode -- is incompatible with the function. If you look at the SQL manual, it says that it returns a variable length string that is defined as "for bit data" -- in other words, binary data. But you have yours declared as
CCSID(1208) -- in other words, UTF-8 text data rather that binary data.

So hopefully that explains why you could solve the problem by coding a VARBINARY value.

All of this makes a lot of sense when you think about the purpose of
base64 -- which is to allow arbitrary binary data to be converted to a text data that can be translated across different character sets without changing its meaning -- and then decoded back to the exact same binary value you started with.

I understand that in this particular scenario, the input just happened to be UTF-8 text -- but remember that base64 serves a lot of other purposes than just encoding Zebra labels. It's regularly used for things that aren't text at all (images, videos, sounds, documents of all
sorts.) So it is always binary data.

It is your job to know that the input happened to be UTF-8, and it is an extra step that you have to code if you want to convert it to EBCDIC . (Though, I don't really understand why you'd want to.)

But that's why there's an extra step needed.


On 1/17/2024 1:33 PM, (WalzCraft) Jerry Forss wrote:

Sorry about the image.

I was just a screen shot of debut with the value of ^XA████^FX
Spee-Dee Logo██^FO510,154^GFA,

Getting closer!

-----Original Message-----
From: RPG400-L <rpg400-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of
(WalzCraft) Jerry Forss
Sent: Wednesday, January 17, 2024 1:22 PM
To: RPG programming on IBM i <rpg400-l@xxxxxxxxxxxxxxxxxx>
Subject: RE: External RE: Base64Decode

I found an example of doing a bit differently but getting closer.



Add varibles

Dcl-S DecodedTextVarBinary sqltype(VARBINARY:4096);

Dcl-S DecodedLabel VARCHAR(4096) CCSID(1208);



And change code to do



// Decode the encoded text into an EBCDIC VarBinary field

Exec SQL Values QSYS2.BASE64_DECODE(:Base64String) Into
:DecodedTextVarBinary;



// Translate binary data in EBCDIC to UTF-8

DecodedLabel = DecodedTextVarBinary;



DecodedLabel

[cid:image002.png@01DA4948.23D733F0]



Why the second step? I have so much to learn.



-----Original Message-----
From: RPG400-L <rpg400-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of
(WalzCraft) Jerry Forss
Sent: Wednesday, January 17, 2024 1:06 PM
To: RPG programming on IBM i <rpg400-l@xxxxxxxxxxxxxxxxxx>
Subject: RE: External RE: Base64Decode



Scott



Here is the pgm stripped down but getting same results.

I am trying different methods with QSys2.Base64Decode and systools.base64decode.

I get all @ returned.



**Free

Ctl-opt option(*SrcStmt : *NoDebugIO)

Dftactgrp(*NO)

ActGrp(*Caller);



Dcl-S DecodedLabel VarChar(4096) CCSID(1208);

Dcl-S Done Ind Inz('0');

Dcl-S False Ind Inz('0');

Dcl-S True Ind Inz('1');

Dcl-S Base64String VarChar(4096) CCSID(1208)


Inz('XlhBDQoNCl5GWCBTcGVlLURlZSBMb2dvDQpeRk81MTAsMTU0XkdGQSw3NTAsNzUwL
DEwLCw6Ok4+


wMixRMDgsTDBDSjAxOCxLMDJMMDIsSzA4MDFGSjA4LEowMjAwM0YwMEMwMixKMDQwNzNDM
DFGMDE4LEs+


wM0UzRjAxRkMwNCxJMDIwM0MxRjMxREMwMixJMDQwM0Y5QzdCOUM0MSxJMDgzREYxRjgzO
UNGLDAwMTA+


3REUxRjg3QkNGOCwwMDIxQ0VGRDgwN0Y5RkMyLDAwNDFFQ0Y4STBGM0NDMSxJMDFGOEVJM
DEwN0UwMDg+


sMDA4MEY4SjA2ODc3MDA0LEkwQzc4MDFGRTAwM0ExQzQsMDAxQzNDMDdGQzAzMUMzQzIsM
DIzOTk4MUZ+


GRTdGMENGRSwwMDM3QzA3RkZDRTM4M0ZGMSwwNDNGQzBKRkMzMDNGMywwMDNFQzFJRjM5Q
zQxREEwOCw+


wMDM5QzNJRkIyMjYwRDgsSTAzODdJRjUwMDMwRTAwNCxJMDMwN0ZGRUMwMDc4NjAwNCxLM
EZGRTY0MEM+


3OCxKMDFGRjAxRTQwRkMsSjAxRTIwMEU2MDdDLEowMzA0MDAyMjEzRSxKMDM4ODAwMTAzR
kUsMkkwMzM+


xMEMxRTAwRSxKMDM4MjA2MDQwMDYsSjA3ODQwNjAwNzYzLEowNzA0NjAwMTAxMyxKMDcyO
UkwMzAwQix+


KMDdBOEkwMjA0RCxKMDdDNEkwNjRFNyxKMDdDMDA0MEUyMDMsSjA3QzIzQzBBMDA3LDIwN
zAzRUJDMzN+


GMDA3MDA0LDIwRjAzRkM4MDdGQzdBMDIsMjA5MDNGRDE4MEZGQkUwNjgsMDBGMDFGQzAwM
UlGRTA3OCx+


KMDFGQzAwMUlGQzAzOCwwMDM4MUJDMDEwSUZDMEMsMDA3ODAwNTA3MDlGRjgwNywwMDdJM
DgxRDExRkY+


4MEYsSTA0SjBBMzNGRjAxRSwwMDFDMDIwMTczM0ZFMDA2LDAwMTgwMjAwRjMzRkMwMzgwO
CwwNDFCSTA+


zRkJGRjgwMUMsSTBGMDQzRkZCMUYsMDIwNDgwMUZGRDNDLEkwMUEwMEpGODAyLDAxMDFFM
DAxRkZDMDA+


3MiwwMDgxOThNMDdFLEowM0NMMDFCODA4LDAwNDAzQkwwMzEwMSwwMDIwMzM4SzBCNDAyL
DAwMTAwN0V+


KMDJEQyxJMDgwNzM4MDAxQUMsSTA0MDEzMEpFNDAxLEkwMjAwMjBDQ0U2MDAyLEkwMUowR
UNGSTA0LE4+


wRUU4MDAxOCxTMDIsSzA4TTA4LEswMkwwMixMMENKMDE4LE0wOEkwQywsOl5GUw0KDQoNC
l5GWCBTZXJ+


2aWNlIFN1bW1hcnleRlMNCl5GTzAsMF5HQjYwOSw4MTIsNV5GUw0KXkZPMjUsNDBeQTBOL
DM1LDQwXkZ+


ET1ZSXkZTDQpeRk8yNSw3NV5BME4sMzUsNDBeRkReRlMNCl5GTzI1LDExMF5BME4sMzUsN
DBeRkReRlM+


NCl5GTzI1LDE0NV5BME4sMzUsNDBeRkReRlMNCg0KXkZYIEJFR0lOX1NlbmRlciBJbmZvc
m1hdGlvbl5+


GUw0KXkZPMTE1LDQwXkFBTiwxOCwxMF5GRF5GUw0KXkZPMTE1LDY1XkFBTiwxOCwxMF5GR
FdhbHpDcmF+


mdF5GUw0KXkZPMTE1LDkwXkFBTiwxOCwxMF5GRDI2MDAgSGVtc3RvY2sgU3ReRlMNCl5GT
zExNSwxMTV+


eQUFOLDE4LDEwXkZEXkZTDQpeRk8xMTUsMTQwXkFBTiwxOCwxMF5GRExhIENyb3NzZSwgV
0kgNTQ2MDN+


eRlMNCl5GTzExNSwxNjVeQUFOLDE4LDEwXkZEXkZTDQpeRlggU2VuZGVyX0VORF5GUw0KD
QpeRlggUGx+


hY2VIb2xkZXJfZm9yX0VaUmV0dXJuXkZTDQoNCl5GWCBBenRlYyBiYXJjb2RlXkZTDQpeQ
jBSLDYsTiw+


wLE4sMSwwDQpeRk80NzAsNDBeRkQ1MzUzMlNQMDkwMDAwMjYwMTc5NDIzODAwXkZTDQoNC
l5GWCBTcGV+


lLURlZSBCYXJjb2RlLCB3ZWlnaHQsIHZlcnNpb25eRlMNCl5GTzI1LDE5MF5BQU4sMTgsM
TBeRkRTcGV+


lLURlZSBCYXJjb2RlIE5vOl5GUw0KXkZPMjUsMzc1XkFBTiwxOCwxMF5TTlNQRUUtREVFI
EFQSSAxLjA+


uMTUzLjBeRlMNCl5GTzI1LDIxNV5BQU4sMTgsMTBeRkRTUCAwOTAwMDAgMjYgMDE3MjQgM
jM4MDBeRlM+


NCl5GTzM2MCwyMTVeQUFOLDE4LDEwXkZEV1Q6MjleRlMNCl5GTzI1LDIzNV5CWTMsXkJDT
iwxMzUsTix+


ZLCxBDQpeQUJeRkRTUDA5MDAwMDI2MDE3OTQyMzgwMF5GUw0KDQpeRlggU2VydmljZSBEZ
XRhaWxeRlM+


NCl5GTzI1LDQwNV5BQU4sMTgsMTBeRkReRlMNCl5GTzUwMCw0MDUsMV5BQU4sMTgsMTBeR
kReRlMNCl5+


GTzI1LDQzMF5BQU4sMTgsMTBeRkReRlMNCl5GTzUwMCw0MzAsMV5BQU4sMTgsMTBeRkReR
lMNCl5GTzI+


1LDQ1NV5BQU4sMTgsMTBeRkReRlMNCl5GTzI1LDQ4MF5BQU4sMTgsMTBeRkReRlMNCg0KX
kZYIFNoaXA+


gVG8gRGV0YWlsXkZTIA0KXkZPMjAwLDUyMF5BRk4sMTgsMTBeRkRTaGlwIFRvOl5GUw0KX
kZPNDAsNTU+


wXkFBTiwxOCwxMF5GREplcnJ5IEZvcnNzXkZTDQpeRk80MCw1NzVeQUFOLDE4LDEwXkZES
mVycnkgRm9+


yc3NeRlMNCl5GTzQwLDYwMF5BQU4sMTgsMTBeRkQ2NjY5IENodXJjaCBIaWxsIEN0XkZTD
QpeRk80MCw+


2MjVeQUFOLDE4LDEwXkZEXkZTDQpeRk80MCw2NTBeQUROLDE4LDEwXkZEXkZTDQpeRk81M
DAsNjUwLDF+


eQUROLDE4LDEwXkZEXkZTDQpeRk80MCw2NzVeQUROLDE4LDEwXkZEXkZTDQpeRk81MDAsN
jc1LDFeQUR+


OLDE4LDEwXkZEXkZTDQpeRk80MCw3MDBeQUVOLDE4LDEwXkZERGVGb3Jlc3ReRlMNCl5GT
zQwLDczMF5+


BRU4sMTgsMTBeRkReRlMNCl5GTzI2MCw3MzBeQUVOLDE4LDEwXkZEV0leRlMNCl5GTzM4M
Cw3MzBeQUV+


OLDE4LDEwXkZENTM1MzJeRlMNCl5GTzQwLDc2MF5BRE4sMTgsMTBeRkQ2MDg3OTcwOTI2X
kZTDQoNCl5+


GWCBTaWRlIEJhciBDb2RlXkZTDQpeRk81MTUsMzgwDQpeQlkyXkJDQiw2NSxOLE4sLEENC
l5GRFNQMDk+


wMDAwMjYwMTc5NDIzODAwXkZTDQoNCl5GTzIwLDUyMF5HQjYwLDMsMl5GUw0KXkZPMjAsN
TIwXkdCMyw+


yNzAsMl5GUw0KXkZPMjAsNzg3XkdCNjAsMywyXkZTDQpeRk80NDAsNTIwXkdCNjAsMywyX
kZTDQpeRk8+


1MDAsNTIwXkdCMywyNzAsMl5GUw0KXkZPNDQwLDc4N15HQjYwLDMsMl5GUw0KDQpeRlggU
29ydCBDb2R+


lXkZTDQpeRk81MTUsNzIwXkEwTiw1NCw3MF5GRDExXkZTDQpeRk81MzAsNzcwXkFETiwxO
CwxMF5GRDA+

wMF5GUw0KDQpeWFoNCg==');



// Convert From Base64Data To ZPL

exec sql values QSys2.Base64_DeCode(:Base64String) Into :DecodedLabel;



*InLr = True;

Return;



-----Original Message-----

From: RPG400-L
<rpg400-l-bounces@xxxxxxxxxxxxxxxxxx<mailto:rpg400-l-bounces@xxxxxxxxx
range.com>> On Behalf Of Scott Klement

Sent: Wednesday, January 17, 2024 12:44 PM

To: rpg400-l@xxxxxxxxxxxxxxxxxx<mailto:rpg400-l@xxxxxxxxxxxxxxxxxx>

Subject: Re: External RE: Base64Decode



Jerry,



I don't know how to help you with this. I feel that your original message is not technical enough for me to delve into it.



Can you provide a code example with hard-coded values that show what is provided on input, and lets me run it to see what you are getting on output, along with an explanation of what you are expecting to be different?





On 1/17/2024 8:27 AM, (WalzCraft) Jerry Forss wrote:

Is anyone actually using the base64decode from RPG and it's working?
Honestly the IBM doc is no help and my other research isn't bring up anything of a working example.
--

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