Upload a file to the task task.item.addfile

curl -X POST \
        -H "Content-Type: application/json" \
        -H "Accept: application/json" \
        -d '{"TASK_ID":"140","FILE":{"NAME":"desc.txt","CONTENT":"BASE64_ENCODED_CONTENT_OF_DESC.TXT"},"auth":"z3eamwwkpgl7u18kx14q1s4c0ffckqsn"}' \
        https://**put_your_bitrix24_address**/rest/task.item.addfile
        

try
        {
        	const response = await $b24.callMethod(
        		"task.item.addfile",
        		{
        			TASK_ID: "140",
        			FILE: {
        				NAME: "desc.txt",
        				CONTENT: "BASE64_ENCODED_CONTENT_OF_DESC.TXT"
        			}
        		}
        	);
        	
        	const result = response.getData().result;
        	console.log(result);
        }
        catch( error )
        {
        	console.error(error);
        }
        

try {
            $response = $b24Service
                ->core
                ->call(
                    'task.item.addfile',
                    [
                        'TASK_ID' => '140',
                        'FILE'    => [
                            'NAME'    => 'desc.txt',
                            'CONTENT' => 'BASE64_ENCODED_CONTENT_OF_DESC.TXT',
                        ],
                    ]
                );
        
            $result = $response
                ->getResponseData()
                ->getResult();
        
            if ($result->error()) {
                error_log($result->error());
                echo 'Error: ' . $result->error();
            } else {
                echo 'Success: ' . print_r($result->data(), true);
            }
        
        } catch (Throwable $e) {
            error_log($e->getMessage());
            echo 'Error adding file to task: ' . $e->getMessage();
        }
        

BX24.callMethod(
            "task.item.addfile",
            {
                TASK_ID: "140",
                FILE: {
                    NAME: "desc.txt",
                    CONTENT: "BASE64_ENCODED_CONTENT_OF_DESC.TXT"
                }
            },
            function(result) {
                if(result.error())
                    console.error(result.error());
                else
                    console.log(result.data());
            }
        );
        

require_once('crest.php');
        
        $result = CRest::call(
            'task.item.addfile',
            [
                'TASK_ID' => "140",
                'FILE' => [
                    'NAME' => 'desc.txt',
                    'CONTENT' => base64_encode(file_get_contents($_SERVER['DOCUMENT_ROOT'] .'/desc.txt'))
                ]
            ]
        );
        
        echo '<PRE>';
        print_r($result);
        echo '</PRE>';