curl --request POST \
  --url https://app.zenedu.io/api/v1/bot/{bot}/products/{product}/steps/{step}/cover \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: multipart/form-data' \
  --form file=@example-file

import requests

url = "https://app.zenedu.io/api/v1/bot/{bot}/products/{product}/steps/{step}/cover"

files = { "file": ("example-file", open("example-file", "rb")) }
headers = {"Authorization": "Bearer <token>"}

response = requests.post(url, files=files, headers=headers)

print(response.text)

const form = new FormData();
form.append('file', '<string>');

const options = {method: 'POST', headers: {Authorization: 'Bearer <token>'}};

options.body = form;

fetch('https://app.zenedu.io/api/v1/bot/{bot}/products/{product}/steps/{step}/cover', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://app.zenedu.io/api/v1/bot/{bot}/products/{product}/steps/{step}/cover",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => "-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"file\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001--",
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: multipart/form-data"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://app.zenedu.io/api/v1/bot/{bot}/products/{product}/steps/{step}/cover"

	payload := strings.NewReader("-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"file\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001--")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://app.zenedu.io/api/v1/bot/{bot}/products/{product}/steps/{step}/cover")
  .header("Authorization", "Bearer <token>")
  .body("-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"file\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001--")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://app.zenedu.io/api/v1/bot/{bot}/products/{product}/steps/{step}/cover")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request.body = "-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"file\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001--"

response = http.request(request)
puts response.read_body

{
  "data": {
    "id": 123,
    "product_id": 123,
    "section_id": 123,
    "type": "message",
    "name": "<string>",
    "text": "<string>",
    "active": true,
    "sort": 123,
    "link_preview": true,
    "task_autocheck": true,
    "custom_field_id": 123,
    "sending_time": {
      "option": "immediately",
      "delay_number": 123,
      "delay_type": "seconds",
      "delay_at": "2023-11-07T05:31:56Z",
      "skip_past_date": true,
      "delay_time": "2023-11-07T05:31:56Z",
      "delay_limit": {
        "time_from": 719,
        "time_to": 719,
        "weekdays": [
          "mon"
        ]
      }
    },
    "menu_time": {
      "type": "immediately",
      "delay_number": 123,
      "delay_type": "seconds",
      "delay_at": "2023-11-07T05:31:56Z",
      "delay_time": "2023-11-07T05:31:56Z"
    },
    "settings": {
      "attach_file": true,
      "has_spoiler": true,
      "attach_style": "<string>",
      "autodelete": 123,
      "protect_content": true,
      "save_profile": true,
      "subtype": "<string>",
      "question_error_message": "<string>",
      "quiz_explanation": "<string>"
    },
    "cover_url": "<string>",
    "attachments": [
      {
        "id": 123,
        "type": "<string>",
        "name": "<string>"
      }
    ],
    "buttons": [
      {
        "id": 123,
        "type": "link",
        "name": "<string>",
        "link": "<string>",
        "offer_id": 123,
        "actions": [
          {}
        ],
        "settings": {},
        "sort": 123
      }
    ],
    "options": [
      {
        "id": 123,
        "text": "<string>",
        "is_correct": true
      }
    ],
    "created_at": "2023-11-07T05:31:56Z",
    "updated_at": "2023-11-07T05:31:56Z"
  }
}

{
  "message": "<string>",
  "errors": {}
}

{
  "message": "<string>",
  "errors": {}
}

{
  "message": "<string>",
  "errors": {}
}

{
  "message": "<string>",
  "errors": {}
}