(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
    }
}

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

use chilkat();

$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 != 1) {
    print $json->lastErrorText() . "\r\n";
    exit;
}

# Get the "image" object.
# imageObj is a JsonObject
$imageObj = $json->ObjectOf("image");
if ($json->get_LastMethodSuccess() == 0) {
    print "image object not found." . "\r\n";
    exit;
}

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

# Get the "thumbnail" object.
# thumbObj is a JsonObject
$thumbObj = $json->ObjectOf("thumbnail");
if ($json->get_LastMethodSuccess() == 0) {
    print "thumbnail object not found." . "\r\n";
    exit;
}

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