curl --request POST \
  --url https://api.example.com/api/v1/upload \
  --header 'Agent: <agent>' \
  --header 'Content-Type: multipart/form-data' \
  --form file='@example-file' \
  --form created_by=xiaoming

import requests

url = "https://api.example.com/api/v1/upload"

files = { "file": ("example-file", open("example-file", "rb")) }
payload = { "created_by": "xiaoming" }
headers = {"Agent": "<agent>"}

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

print(response.text)

const form = new FormData();
form.append('file', 'file:///Users/liueic/Downloads/607a919df57e2a8b6a7ab17022cdf663122166603.jpg');
form.append('created_by', 'xiaoming');

const options = {method: 'POST', headers: {Agent: '<agent>'}};

options.body = form;

fetch('https://api.example.com/api/v1/upload', 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://api.example.com/api/v1/upload",
  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\nfile:///Users/liueic/Downloads/607a919df57e2a8b6a7ab17022cdf663122166603.jpg\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"created_by\"\r\n\r\nxiaoming\r\n-----011000010111000001101001--",
  CURLOPT_HTTPHEADER => [
    "Agent: <agent>",
    "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://api.example.com/api/v1/upload"

	payload := strings.NewReader("-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"file\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\nfile:///Users/liueic/Downloads/607a919df57e2a8b6a7ab17022cdf663122166603.jpg\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"created_by\"\r\n\r\nxiaoming\r\n-----011000010111000001101001--")

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

	req.Header.Add("Agent", "<agent>")

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.example.com/api/v1/upload")
  .header("Agent", "<agent>")
  .body("-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"file\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\nfile:///Users/liueic/Downloads/607a919df57e2a8b6a7ab17022cdf663122166603.jpg\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"created_by\"\r\n\r\nxiaoming\r\n-----011000010111000001101001--")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.example.com/api/v1/upload")

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

request = Net::HTTP::Post.new(url)
request["Agent"] = '<agent>'
request.body = "-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"file\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\nfile:///Users/liueic/Downloads/607a919df57e2a8b6a7ab17022cdf663122166603.jpg\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"created_by\"\r\n\r\nxiaoming\r\n-----011000010111000001101001--"

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

{
  "code": 200,
  "msg": "File uploaded successfully",
  "data": {
    "id": "https://s3.juniortree.com/xiao-x-bao/uploads/2025/09/01/b9cb193906b145939dc3d9cb6240b933.jpg",
    "name": "607a919df57e2a8b6a7ab17022cdf663122166603.jpg",
    "size": 348514,
    "extension": "jpg",
    "mime_type": "image/jpeg",
    "created_by": "xiaoming",
    "created_at": 1756713029
  }
}