How to send call data to the Yandex.Metrica API?

Question

PHP

Based on documentation https://tech.yandex.ru/metrika/doc/api2/management... I'm trying to load data from the example into Yandex metric:
UserId,DateTime,Price,Currency,PhoneNumber,TalkDuration,HoldDuration,CallMissed,Tag, FirstTimeCaller,URL , CallTrackerURL
133591247640966458.1481714026.678.90 +70987654321,17,23,0,,2, https://test.com/,https://test.com/ I do this with cURL:

$token  = "AAAAAAAAA";
    $counter_id = "XXXXXXXXXXXX";

    $url = 'https://api-metrika.yandex.ru/management/v1/counter/' . $counter_id . '/offline_conversions/upload_calls?client_id_type=USER_ID&oauth_token=' . $token;

    $file = "csv.csv";

    $curl = curl_init();

    curl_setopt($curl, CURLOPT_URL, $url);
    curl_setopt($curl, CURLOPT_POST, 1);
    curl_setopt($curl, CURLOPT_HTTPHEADER, ['Content-Type: text/csv']);

    $cfile = new CurlFile($file,  'text/csv');
    $data = array('data-binary' => $cfile);

    curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);

    $curl_response = curl_exec($curl);

    curl_close($curl);
    
    return $curl_response;

The text of the documentation says: Data is transferred as multipart/form-data, in CSV format, in the first line it is necessary to transfer the names of the columns. "But how to transfer the first line with the names of the columns first? Where I think is wrong?)

Answer 1

Oh, you moved it into a separate question)
In general, StaticCall,UserId - mandatory columns
Headers

Content-Type: multipart/form-data; boundary=-----------------------boundary
Content-Length: 12345

Body

--------------------------boundary\r\n
Content-Disposition: form-data; name="file"; filename="file.csv"\r\n
Content-Type: text/csv\r\n\r\n
DATA\r\n\r
----------------- ---------boundary--

Example (for curl everything is the same)

function request($url, $data, $headers){
  $opt = array(
    'http' => array(
      'method' => 'POST',
      'content' => $data,
      'header' => $headers
    )
  );

  $context = stream_context_create($opt);

  $response = @file_get_contents($url, FALSE, $context);
  
  return $response;
  
}

$oauth_token='xxx';
$boundary = "7zDUQOAIAE9hEWoV";
$filename = 'data.csv';

$calls = "StaticCall,UserId,DateTime,Price,Currency,PhoneNumber,TalkDuration,HoldDuration,CallMissed,Tag,FirstTimeCaller,URL,CallTrackerURL".PHP_EOL;
$calls .= "1,133591247640966458,1481714026,678.90,RUB,+71234567890,136,17,0,,1,https://test.com/,https://test.com/".PHP_EOL;
$calls .= "1,579124169844706072,1481718066,123.45,RUB,+70987654321,17,23,0,,2,https://test.com/,https://test.com/".PHP_EOL;
$calls .= "1,148059425477661429,1481718126,678.90,RUB,+71234509876,72,11,0,,0,https://test.com/,https://test.com/";

$data = "--------------------------$boundary\x0D\x0A";
$data .= "Content-Disposition: form-data; name=\"file\"; filename=\"$filename\"\x0D\x0A";
$data .= "Content-Type: text/csv\x0D\x0A\x0D\x0A";
$data .= $calls . "\x0A\x0D\x0A";
$data .= "--------------------------$boundary--";


$headers = array();
$headers[] = "Content-Type: multipart/form-data; boundary=------------------------$boundary";
$headers[] = 'Content-Length: '.strlen($data);
$headers = implode(PHP_EOL, $headers);

$url = "https://api-metrika.yandex.ru/management/v1/counter/39764535/offline_conversions/upload_calls?client_id_type=USER_ID&oauth_token=$oauth_token";

$result = request($url, $data, $headers);

var_dump($result);

For curl like that

CURLOPT_POSTFIELDS => $data
CURLOPT_HTTPHEADER => array(
    "Content-Type: multipart/form-data; boundary=------------------------$boundary",
    "Content-Length: " . strlen($data)