(Perl) Get Individual Photo Info

Assuming we have the ID of a Photo, this example demonstrates how to retrieve the photo information and parse the JSON.

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

use chilkat();

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

# This example assumes a previously obtained an access token
$oauth2 = chilkat::CkOAuth2->new();
$oauth2->put_AccessToken("FACEBOOK-ACCESS-TOKEN");

$rest = chilkat::CkRest->new();

# Connect to Facebook...
$success = $rest->Connect("graph.facebook.com",443,1,1);
if ($success != 1) {
    print $rest->lastErrorText() . "\r\n";
    exit;
}

# Provide the authentication credentials (i.e. the access key)
$rest->SetAuthOAuth2($oauth2);

# Assumes we've already obtained a Photo ID.
$photoId = "10210199026347451";

$sbPath = chilkat::CkStringBuilder->new();
$sbPath->Append("/v2.7/");
$sbPath->Append($photoId);

# Select the fields we want.
# This example will select many of the possible fields.
# See https://developers.facebook.com/docs/graph-api/reference/photo/
$rest->AddQueryParam("fields","id,album,can_delete,can_tag,from,height,width,images,link,name,name_tags,picture,place,target");

$responseJson = $rest->fullRequestNoBody("GET",$sbPath->getAsString());
if ($rest->get_LastMethodSuccess() != 1) {
    print $rest->lastErrorText() . "\r\n";
    exit;
}

$json = chilkat::CkJsonObject->new();
$json->put_EmitCompact(0);
$json->Load($responseJson);

# Show the JSON in human-readable format.
print $json->emit() . "\r\n";

# A sample response is shown below.
# Demonstrate how to parse values from the JSON.
print "Album name: " . $json->stringOf("album.name") . "\r\n";
$canDelete = $json->BoolOf("can_delete");
print "Can Delete: " . $canDelete . "\r\n";
print "From Name: " . $json->stringOf("from.name") . "\r\n";
$height = $json->IntOf("height");
$width = $json->IntOf("width");
print "Dimensions: " . $width . "x" . $height . "\r\n";
print "First Image Source: " . $json->stringOf("images[0].source") . "\r\n";

# A sample JSON response is shown here.  
# { 
#   "id": "10210199026347451",
#   "album": { 
#     "created_time": "2009-10-19T00:06:46+0000",
#     "name": "Timeline Photos",
#     "id": "1237223526054"
#   },
#   "can_delete": true,
#   "can_tag": true,
#   "from": { 
#     "name": "Matt Smith",
#     "id": "10224048320139890"
#   },
#   "height": 120,
#   "width": 120,
#   "images": [
#     { 
#       "height": 120,
#       "source": "https:\/\/scontent.xx.fbcdn.net\/v\/t1.0-9\/14462791_10210199026347451_7830642117574407060_n.jpg?oh=a7f9ed10cf9cd81a82adeb541c60e2e2&oe=58ABB195",
#       "width": 120
#     }
#   ],
#   "link": "https:\/\/www.facebook.com\/photo.php?fbid=10210199026347451&set=a.1237223526054.2038240.1093202869&type=3",
#   "name": "Ignore my posts -- I'm doing some testing for Facebook related programming...",
#   "picture": "https:\/\/scontent.xx.fbcdn.net\/v\/t1.0-9\/14462791_10210199026347451_7830642117574407060_n.jpg?oh=a7f9ed10cf9cd81a82adeb541c60e2e2&oe=58ABB195"
# }
#