(Perl) JSON: Nested Objects

Here we have a JSON object that contains nested JSON objects. This example demonstrates how to access the contents of the nested objects.

{
  "name": "donut",
  "image":
    {
    "fname": "donut.jpg",
    "w": 200,
    "h": 200
    },
  "thumbnail":
    {
    "fname": "donutThumb.jpg",
    "w": 32,
    "h": 32
    }
}

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat Perl Downloads Perl Module for Windows, MacOS, Linux, Alpine Linux

use chilkat();

$success = 0;

$json = chilkat::CkJsonObject->new();

# This is the above JSON with whitespace chars removed (SPACE, TAB, CR, and LF chars).
# The presence of whitespace chars for pretty-printing makes no difference to the Load
# method. 
$jsonStr = "{\"name\": \"donut\",\"image\":{\"fname\": \"donut.jpg\",\"w\": 200,\"h\": 200},\"thumbnail\":{\"fname\": \"donutThumb.jpg\",\"w\": 32,\"h\": 32}}";

$success = $json->Load($jsonStr);
if ($success == 0) {
    print $json->lastErrorText() . "\r\n";
    exit;
}

# Get the "image" object.
$imageObj = chilkat::CkJsonObject->new();
$json->ObjectOf2("image",$imageObj);

print "image: fname=" . $imageObj->stringOf("fname") . ", width=" . $imageObj->IntOf("w") . ", height=" . $imageObj->IntOf("h") . "\r\n";

# Get the "thumbnail" object.
$thumbObj = chilkat::CkJsonObject->new();
$json->ObjectOf2("thumbnail",$thumbObj);

print "thumbnail: fname=" . $thumbObj->stringOf("fname") . ", width=" . $thumbObj->IntOf("w") . ", height="
     . $thumbObj->IntOf("h") . "\r\n";