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  1.  Home
  2. RPG400-L
  3. August 2020

RE: Manipulating a decoded UTF8 string

Sorry to ask, but how do I look at the base64Decoded in hex?

-----Original Message-----
From: RPG400-L [mailto:rpg400-l-bounces@xxxxxxxxxxxxxxxxxx] On Behalf Of Jon Paris
Sent: Tuesday, August 18, 2020 11:52 AM
To: RPG programming on IBM i <rpg400-l@xxxxxxxxxxxxxxxxxx>
Subject: Re: Manipulating a decoded UTF8 string

If it works even though you can't find the ^XZ' then one of two things is happening.

1) The ^XZ' isn't there at all or
2) It is there but due to charset changes it doesn't _appear_ as that character string.

The second one seems to be the most likely. i.e. you are scanning for the wrong value. Look at the value in base64Decoded in hex. Identify the position where the '^XZ' should be and identify the hex representation. Then scan for that,

For that matter you should be able to identify the base64 encoded version of that sequence.



On Aug 18, 2020, at 11:27 AM, Greg Wilburn <gwilburn@xxxxxxxxxxxxxxxxxxxxxxx> wrote:

Jon,

I'm receiving a SOAP XML response from the Endicia Label Server (Stamps.com) API when requesting a postage label. The response contains an element <Base64LabelImage> that contains the base64 encoded ZPLII string to produce the label (it can actually contain up to 4 label strings).

I'm using HTTPAPI to make the request and parse the response:

rc = http_post_xml(
url
: %addr(soap) + 2
: %len(soap)
: %paddr(StartOfElement)
: %paddr(EndOfElement)
: %addr(userData)
: HTTP_TIMEOUT
: *omit
: 'text/xml; charset=UTF-8; ' + GETLABELACTION
);

Inside the EndOfElement() procedure I base64_decode the value received... I'm not sure what else I would do with it??

dcl-s base64encoded varchar(65535) inz;
dcl-s base64decoded char(65535) inz;
dcl-s len uns(10) inz;

when name = 'Base64LabelImage';
base64Encoded = value;
len = base64_decode( %addr(base64Encoded:*data)
: %len(%trim(base64Encoded))
: %addr(base64Decoded)
: %size(base64Decoded)
);
GetLabelResponse.label(1) = %subst(base64Decoded:1:len);

I then write the label(s) data to IFS files before sending them directly to the appropriate Zebra Printer.
For x = 1 to labelCount;
labelFd = open(labelFile(x):flag:mode:1208:0); // Label is UTF8 per Endicia Label Server Support
Ifs_Write(labelFd:GetLabelResponse.label(x));
Ifs_CloseFile(labelFd);
Endfor;

This is working flawlessly.

For one particular process we do, I need to add text data to the END of the label... I want to do this just before I write the label to the IFS file.

To do this:
1. I scan the label data for '^XZ' (end of label)
2. I replace with ''
3. I add my string of ZPLII (generated by another service program) and '^XZ' (end of label)

The issue I'm encountering:

I'm not "Finding" the '^XZ' when I scan GetLabelResponse.label(x).
When I display the variable in debug, it looks nothing like the data written to the IFS - I can't "see" the '^XZ' (or any ZPLII characters). But when I write it to the IFS, it appears perfect in Notepad and it prints perfectly.

Things I've tried:
Place the label data into a variable with CCSID(1252) I can scan and find the string and manipulate it in RPG, but then I can't seem to write it to the IFS correctly.
Place the label data into a variable with CCSID(1208) I receive An error occurred during conversion from CCSID(1208) to CCSID(937)
*This particular label contains the superscript "TM" symbol

Maybe I'm still doing something wrong??
I'm at a loss.

Greg


-----Original Message-----
From: RPG400-L [mailto:rpg400-l-bounces@xxxxxxxxxxxxxxxxxx] On Behalf Of Jon Paris
Sent: Monday, August 17, 2020 4:55 PM
To: RPG programming on IBM i <rpg400-l@xxxxxxxxxxxxxxxxxx>
Subject: Re: Manipulating a decoded UTF8 string

Can you show us what you were trying?

Hex or Char would make no difference - which indicates that your character version is wrongly coded.

%Scan ( X'F1' : xxxxx ) will produce the same result as %Scan ( char : xxxxx ) where "char" has the value X'F1'.

I also don't see why you need to "decoding the string into an RPG variable" - past experience should have shown you by now that therein lie problems <grin>

If %Scan can find the string then %ScanRpl will find the string and replace it for you.



On Aug 17, 2020, at 4:44 PM, Greg Wilburn <gwilburn@xxxxxxxxxxxxxxxxxxxxxxx> wrote:

So in another thread I got some help using base64_decode to decode an XML element and write that to the IFS specifying CCSID (1208).

They data is a ZPLII label string. I need to scan for value that represents the "end" of the label and replace that value with my own string BEFORE I write it to IFS.

The issue is that upon decoding the string into an RPG variable, I can't seem to find (%SCAN) find the value. If I scan for the hex equivalent I can find it. But then I'm not sure how to add my string?
Do I have to convert everything to hex to manipulate that RPG variable?

I've tried messing with CCSIDs on the RPG Variables, but didn't have much luck.

What am I missing?

Thanks,
Greg

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