Write YAJL docNode to IFS

[mjhaston]

Scott recently added a third parameter to this function so you can save your incoming JSON right to the IFS. It's awesome.

docNode = yajl_stdin_load_tree(*on : errMsg : filename);

However, now I'm finding I actually want to work with the incoming JSON a bit before saving it. Is there a command to write docNode, which I believe is a pointer (like yajl_val) to the IFS or would I need to convert that to a string and then do an IFS_WRITE?

[mjhaston]

In case it helps anyone else, I went this route. I probably found it in one of Scott's presentations

d retstr                  s                   sqltype(clob:2000000)
d VARPREF         c                   const(2)      
d VARPREF4       c                   const(4)      
d char                   s            1c   ccsid(1200)    ​



docNode = yajl_stdin_load_tree(*on : errMsg);

x = yajl_stringify( docNode                          
                  : %addr(retstr) + VARPREF4          
                  : %len(retstr) * %size(char)        
                  );                                  
if (x > 0);                                          
 ​   exec sql 
    CALL QSYS2.IFS_WRITE_UTF8(PATH_NAME => :filename,    
                              LINE => trim(:retstr),    
                         OVERWRITE => 'APPEND',          
                       END_OF_LINE => 'CRLF');          
endif;                                                    ​

[Scott Klement]

You certainly didn't gt that "CALL QSYS2.IFSWRITE" business from me. I would never do that...

Also, wouldn't you need an "EXEC SQL" in there to do that CALL statement? Pretty sure this code won't work as given.

[Scott Klement]

I really don't understand this whole thread. You want to receive a JSON document inside a program that's acting as a REST API. Then you apparently want to re-generate a whole new JSON document from it and save that to the IFS rather than saving the original one via yajl_stdin_load_tree. Why do that? Has the data in the JSON changed somehow?

Why not just read the JSON into your program instead of letting yajl_stdin_load_tree do it for you? Then parse it with yajl_string_load_tree or yajl_buf_load_tree?

I just don't understand what you're trying to do, here.

[mjhaston]

docNode = yajl_stdin_load_tree(*on : errMsg : filename);

This works great and is a perfect solution to save the JSON automatically, but later I found that I needed to make sure the sessionid sent with that JSON was valid before writing to the IFS.

[Barbara Morris]

By the way, instead of hardcoding the length of the varying length prefix like this:

%addr(retstr) + VARPREF4

you can use *DATA with %ADDR like this:

%addr(retstr : *data)

https://www.producthunt.com/discussions/three-step-checklist-for-successful-web3-nft-project-the-fracas-way