.wln messages import returns error 4

Karnaugh, hello. Sorry for long waiting of answer.
Error 4 you can get for this request only if file was not sent or sent with wrong parameters.
Your headers and content have some differencies with browser's ones:

1. content-type:multipart/form-data; boundary=----WebKitFormBoundarySpQSQhs0MtJaVfeg - no boundary was set
2. Content-Disposition: form-data; name="messages_filter_import_file"; filename="kind.zip" - name and filename in quotes
3. Content-Type: application/x-zip-compressed - insted of application/zip

I have testing with example. But not working.

// Convert the data array into URL Parameters like a=b&foo=bar etc.
        $data = http_build_query($data);
       
        // parse the given URL
        echo $url;
        $url = parse_url($url);
       
        print_r(    $url );
        //if ($url['scheme'] != 'http') {
        //    die('Error: Only HTTP request are supported !');
        //}
       
        // extract host and path:
        $host = $url['host'];
        $path = $url['path'];
       
        // open a socket connection on port 80 - timeout: 30 sec
        $fp = fsockopen($host, 80, $errno, $errstr, 30);
        echo $path.'<br/>';
        if ($fp){
           
            // send the request headers:
            fputs($fp, "POST $path HTTP/1.1\r\n");
            fputs($fp, "Host: $host\r\n");
           
            if ($referer != '')
            fputs($fp, "Referer: $referer\r\n");
            fputs($fp, "url:".$url."\r\n\r\n");
            //fputs($fp, "Content-type: application/x-www-form-urlencoded\r\n");
            //fputs($fp, "Content-length: ". strlen($data) ."\r\n");
            //fputs($fp, "Connection: close\r\n\r\n");
            fputs($fp, "Connection: keep-alive\r\n\r\n");
            fputs($fp, "Content-Length: 2744\r\n\r\n");
            fputs($fp, "Cache-Control: no-cache\r\n\r\n");
            fputs($fp, "Content-Type: multipart/form-data; boundary=----WebKitFormBoundarySpQSQhs0MtJaVfeg");
            fputs($fp, "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\n\r\n");
            fputs($fp, "Accept-Charset: windows-1251,utf-8;q=0.7,*;q=0.3\r\n\r\n");
            fputs($fp, "Accept-Encoding: gzip,deflate,sdch\r\n\r\n");
            fputs($fp, "Accept-Language: ru,en-US;q=0.8,en;q=0.6\r\n\r\n");
            fputs($fp, "------WebKitFormBoundarylvunQiir9AesO8qB\r\n\r\n");
            fputs($fp, 'Content-Disposition: form-data; name="params"\r\n\r\n');
            fputs($fp, '{"itemId":17928018,"eventHash":"jUploadForm'.time().'}\r\n\r\n');
            fputs($fp, "------WebKitFormBoundarylvunQiir9AesO8qB\r\n\r\n");
            fputs($fp, 'Content-Disposition:   form-data; name="messages_filter_import_file"; filename="17928018.zip"');
            fputs($fp, "------WebKitFormBoundarylvunQiir9AesO8qB\r\n\r\n");
            //fputs($fp, 'Content-Disposition: form-data; name="messages_filter_import_file"; filename="17928018.wln"\r\n\r\n');
            fputs($fp, "Content-Type: application/zip\r\n\r\n");
            fputs($fp, "------WebKitFormBoundarylvunQiir9AesO8qB--\r\n\r\n");
           
           
           
            fputs($fp, $data);
           
            $result = '';
            while(!feof($fp)) {
                // receive the results of the request
                $result .= fgets($fp, 128);
            }
        }
        else {
            return array(
            'status' => 'err',
            'error' => "$errstr ($errno)"
            );
        }
       
        // close the socket connection:
        fclose($fp);
       
        // split the result header from the content
        $result = explode("\r\n\r\n", $result, 2);
       
        $header = isset($result[0]) ? $result[0] : '';
        $content = isset($result[1]) ? $result[1] : '';
       
        // return as structured array:
        return array(
        'status' => 'ok',
        'header' => $header,
        'content' => $content
        );

{"error":4,"reason":"WRONG_PARAMS"}