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The single one should be sufficient -- it will store in the credentials in memory and re-use them until you clear them (by calling HTTP_setAuth again with HTTP_AUTH_NONE) or until the activation group is reclaimed.

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The difference seems to be that you are base64 encoding it, whereas the online converters you cite are outputting hex strings instead of base64 encoding. If you translated the base64 letters to lowercase, you'd change their meaning -- so don't do that. But if you output data in hex instead, you can ...

The JSON standard does not allow for a number to start with zero, except for the number zero itelf. See here: https://www.json.org/json-en.html If other JSON parsers allow the leading zero, then they are allowing non-standard values. Whether a field is packed or not is not, as far as I can tell, ger...

1.32 is 13 releases of HTTPAPI out-of-date. To my knowledge it will work (as well as expected for an old release with known bugs) on v6r1 or newer, but I doubt very much that anyone has ever tested a release that old on v7r4, so can't say for certain. To my knowledge, it will work the same on v7r4 o...

I'm not sure that I follow you. What part is meant to be lowercase only?

What is your question? How to translate something to lowercase?

Also, calling Java from RPG is done using the Java Invocation API, which can disable certain types of optimization -- and therefore can negatively affect performance. The "best" way to do this is to run the Java code in an application server, and code it as a REST API that you can call fro...

Sorry, I don't understand the question. What sort of authentication are you asking about?

http_setOption is for setting options in HTTPAPI - it has nothing whatsoever to do with YAJL. You will need to troubleshoot what's happening. Use the WRKLNK command to see what the CCSID on your JSON file is. Use DSPF and F10=Display Hex to see the hex value of the accented character. Look on a tabl...

No, there's nothing special -- it just locates the object in the library list (or hard-coded library if you set it up that way) just like any other disk object. No magic here!