finlabsindia/wp-content/plugins/jetpack/json-endpoints/class.wpcom-json-api-get-media-endpoint.php

<?php

new WPCOM_JSON_API_Get_Media_Endpoint( array(
	'description' => 'Get a single media item (by ID).',
	'group'       => 'media',
	'stat'        => 'media:1',
	'method'      => 'GET',
	'path'        => '/sites/%s/media/%d',
	'deprecated'  => true,
	'new_version' => '1.1',
	'max_version' => '1',
	'path_labels' => array(
		'$site'    => '(int|string) Site ID or domain',
		'$media_ID' => '(int) The ID of the media item',
	),
	'response_format' => array(
		'id'    => '(int) The ID of the media item',
		'date' =>  '(ISO 8601 datetime) The date the media was uploaded',
		'parent'           => '(int) ID of the post this media is attached to',
		'link'             => '(string) URL to the file',
		'title'            => '(string) Filename',
		'caption'          => '(string) User-provided caption of the file',
		'description'      => '(string) Description of the file',
		'metadata'         => '(array) Array of metadata about the file, such as Exif data or sizes',
	),

	'example_request'      => 'https://public-api.wordpress.com/rest/v1/sites/82974409/media/934',
	'example_request_data' =>  array(
		'headers' => array(
			'authorization' => 'Bearer YOUR_API_TOKEN'
		)
	)
) );

class WPCOM_JSON_API_Get_Media_Endpoint extends WPCOM_JSON_API_Endpoint {
	function callback( $path = '', $blog_id = 0, $media_id = 0 ) {
		$blog_id = $this->api->switch_to_blog_and_validate_user( $this->api->get_blog_id( $blog_id ) );
		if ( is_wp_error( $blog_id ) ) {
			return $blog_id;
		}

		//upload_files can probably be used for other endpoints but we want contributors to be able to use media too
		if ( !current_user_can( 'edit_posts', $media_id ) ) {
			return new WP_Error( 'unauthorized', 'User cannot view media', 403 );
		}

		return $this->get_media_item( $media_id );
	}
}