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  1.  Home
  2. RPG400-L
  3. August 2017

Re: RPG, retrieving JSON data from a web service

The parsing, etc. works.  Not as elegantly as your example though!  This is getting tucked away for future reference.  Thank you.

As the Subject says, retrieving the JSON data is where it fails.

    docNode = yajl_stmf_load_tree('home/bmartin/Louie.json': errMsg );
    if errMsg = '';

    node = YAJL_object_find(docNode: 'success');
    result.success = YAJL_is_true(node);

    node = YAJL_object_find(docNode: 'errmsg');
    result.errmsg = YAJL_get_string(node);

    list = YAJL_object_find(docNode: 'list');

...

The directory is copy/paste from wrklnk.
Louie.json has valid data.
Run in debug, errMsg is blank, list is empty.

On 8/23/2017 2:53 PM, Slanina, John wrote:
I don't know what you're looking for but here is one. I spend all day write JSON CODE.

Thanks
John Slanina


begsr parseOK;

// Clear out any control characters, replace with blanks
gXmlResponse = %ScanRpl(x'0D' : '' : gXmlResponse );
gXmlResponse = %ScanRpl(x'25' : ' ' : gXmlResponse );
gXmlResponse = %ScanRpl(x'00' : ' ' : gXmlResponse );

docNode = yajl_buf_load_tree(%addr(gXmlResponse:*data) : %len(gXmlResponse) : JsonErrMsg);
items = YAJL_object_find(docNode: 'items');
links = YAJL_object_find(docNode: 'links');

i = *zeros;

dow YAJL_ARRAY_LOOP( items : i: val );

clear ofiupd01Ds;

Node = YAJL_object_find(val : 'inventoryId');
ofiupd01DS.CBJJA4 = YAJL_get_Number(Node);

Node = YAJL_object_find(val : 'serialNumber');
ofiupd01DS.CBWPCS = YAJL_get_string(Node);

Node = YAJL_object_find(val : 'item_number');
ofiupd01DS.CBSXBT = YAJL_get_string(Node);

ofiupd01DS.CBJKA4 = resourceId_P;

Node = YAJL_object_find(val : 'status');
ofiupd01DS.CBW3CS = YAJL_get_string(Node);

ofiupd01DS.CBACDT = %dec(%date():*cymd);
ofiupd01DS.CBACTM = %dec(%Time():*ISO);
ofiupd01DS.CBH6NB = PGMSDS.JOB_NUM;
ofiupd01DS.CBADVN = PGMSDS.PROC_PGM;
ofiupd01DS.CBAFVN = PGMSDS.JOB_USER;

// Delete the prior value of this record if in file and replace.
delete (ofIupd01Ds.CBJJA4) ofiupd01;
write ofIup01f ofIupd01Ds;
enddo;

i = *zeros;

dow YAJL_ARRAY_LOOP( links : i: val );

Node = YAJL_object_find(val : 'rel');
relVal= YAJL_get_string(Node);
if relVal = 'next';
Node1 = YAJL_object_find(val : 'href');
uri = YAJL_get_string(Node1);
Endif;

enddo;

endsr;


{
"totalResults": 1482,
"limit": 10,
"offset": 0,
"items": [
{
"inventoryId": 28282912,
"status": "resource",
"serialNumber": "PKGRVSSQG",
"quantity": 1,
"resourceId": "81333",
"resourceInternalId": 259,
"item_number": "S425HDC",
"port_info": "1:C",
"icoms_techid": "81333",
"links": [
{
"rel": "canonical",
"href": "https://api.etadirect.com/rest/ofscCore/v1/inventories/28282912";
},
{
"rel": "describedby",
"href": "https://api.etadirect.com/rest/ofscCore/v1/metadata-catalog/inventories";
}
]
},
{
"inventoryId": 26351924,
"status": "resource",
"serialNumber": "A9200019076F452",
"quantity": 1,
"resourceId": "81333",
"resourceInternalId": 259,
"item_number": "TIVMINI",
"port_info": "1:C",
"icoms_techid": "81333",
"links": [
{
"rel": "canonical",
"href": "https://api.etadirect.com/rest/ofscCore/v1/inventories/26351924";
},
{
"rel": "describedby",
"href": "https://api.etadirect.com/rest/ofscCore/v1/metadata-catalog/inventories";
}
]
},
{
"inventoryId": 28282903,
"status": "resource",
"serialNumber": "PKGTVKSQK",
"quantity": 1,
"resourceId": "81333",
"resourceInternalId": 259,
"item_number": "S425HDC",
"port_info": "1:C",
"icoms_techid": "81333",
"links": [
{
"rel": "canonical",
"href": "https://api.etadirect.com/rest/ofscCore/v1/inventories/28282903";
},
{
"rel": "describedby",
"href": "https://api.etadirect.com/rest/ofscCore/v1/metadata-catalog/inventories";
}
]
},
{
"inventoryId": 28282916,
"status": "resource",
"serialNumber": "PKCPJXJPT",
"quantity": 1,
"resourceId": "81333",
"resourceInternalId": 259,
"item_number": "S425HDC",
"port_info": "1:C",
"icoms_techid": "81333",
"links": [
{
"rel": "canonical",
"href": "https://api.etadirect.com/rest/ofscCore/v1/inventories/28282916";
},
{
"rel": "describedby",
"href": "https://api.etadirect.com/rest/ofscCore/v1/metadata-catalog/inventories";
}
]
},
{
"inventoryId": 28282913,
"status": "resource",
"serialNumber": "PKGSQQXLD",
"quantity": 1,
"resourceId": "81333",
"resourceInternalId": 259,
"item_number": "S425HDC",
"port_info": "1:C",
"icoms_techid": "81333",
"links": [
{
"rel": "canonical",
"href": "https://api.etadirect.com/rest/ofscCore/v1/inventories/28282913";
},
{
"rel": "describedby",
"href": "https://api.etadirect.com/rest/ofscCore/v1/metadata-catalog/inventories";
}
]
},
{
"inventoryId": 28282914,
"status": "resource",
"serialNumber": "PKCQVPWNR",
"quantity": 1,
"resourceId": "81333",
"resourceInternalId": 259,
"item_number": "S425HDC",
"port_info": "1:C",
"icoms_techid": "81333",
"links": [
{
"rel": "canonical",
"href": "https://api.etadirect.com/rest/ofscCore/v1/inventories/28282914";
},
{
"rel": "describedby",
"href": "https://api.etadirect.com/rest/ofscCore/v1/metadata-catalog/inventories";
}
]
},
{
"inventoryId": 28282900,
"status": "resource",
"serialNumber": "PKCQKGSSV",
"quantity": 1,
"resourceId": "81333",
"resourceInternalId": 259,
"item_number": "S425HDC",
"port_info": "1:C",
"icoms_techid": "81333",
"links": [
{
"rel": "canonical",
"href": "https://api.etadirect.com/rest/ofscCore/v1/inventories/28282900";
},
{
"rel": "describedby",
"href": "https://api.etadirect.com/rest/ofscCore/v1/metadata-catalog/inventories";
}
]
},
{
"inventoryId": 28282902,
"status": "resource",
"serialNumber": "PKGTMCDGG",
"quantity": 1,
"resourceId": "81333",
"resourceInternalId": 259,
"item_number": "S425HDC",
"port_info": "1:C",
"icoms_techid": "81333",
"links": [
{
"rel": "canonical",
"href": "https://api.etadirect.com/rest/ofscCore/v1/inventories/28282902";
},
{
"rel": "describedby",
"href": "https://api.etadirect.com/rest/ofscCore/v1/metadata-catalog/inventories";
}
]
},
{
"inventoryId": 28282832,
"status": "resource",
"serialNumber": "EVY616D22179",
"quantity": 1,
"resourceId": "81333",
"resourceInternalId": 259,
"item_number": "EDTA200",
"port_info": "1:C",
"icoms_techid": "81333",
"links": [
{
"rel": "canonical",
"href": "https://api.etadirect.com/rest/ofscCore/v1/inventories/28282832";
},
{
"rel": "describedby",
"href": "https://api.etadirect.com/rest/ofscCore/v1/metadata-catalog/inventories";
}
]
},
{
"inventoryId": 28282898,
"status": "resource",
"serialNumber": "PKCPXJNLS",
"quantity": 1,
"resourceId": "81333",
"resourceInternalId": 259,
"item_number": "S425HDC",
"port_info": "1:C",
"icoms_techid": "81333",
"links": [
{
"rel": "canonical",
"href": "https://api.etadirect.com/rest/ofscCore/v1/inventories/28282898";
},
{
"rel": "describedby",
"href": "https://api.etadirect.com/rest/ofscCore/v1/metadata-catalog/inventories";
}
]
}
],
"links": [
{
"rel": "canonical",
"href": "https://api.etadirect.com/rest/ofscCore/v1/resources/81333/inventories";
},
{
"rel": "describedby",
"href": "https://api.etadirect.com/rest/ofscCore/v1/metadata-catalog/resources#definitions/inventories";
},
{
"rel": "next",
"href": "https://api.etadirect.com/rest/ofscCore/v1/resources/81333/inventories?offset=10";
}
]
}



-----Original Message-----
From: RPG400-L [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Booth Martin
Sent: Wednesday, August 23, 2017 3:37 PM
To: RPG programming on the IBM i (AS/400 and iSeries)
Subject: Re: RPG, retrieving JSON data from a web service

are there a couple of examples of other programmer's versions of using Scott Klement's YAGL library to retrieve JSON data?  I am missing some important aspect.  Whether it is a typo, a total mess-up, or what  I do not know.  I am thinking that perhaps if I see how others have used his hard work then I will have it working too.

I can retrieve the data with javascript in a non-iSeries environment so I am presuming I have a stupid tucked away in there and am being blind to it.


On 8/20/2017 5:58 PM, Booth Martin wrote:
I am failing to understand something.

 * I am using Scott Klement's YAJL library for the iSeries.
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