如何使用axios nodejs将字符串内容的二进制流发送到第三方api

const axios = require('axios');
const fs = require('fs');

const fileContent = fs.readFileSync('file.txt');
const binaryData = Buffer.from(fileContent, 'utf-8');

const instance = axios.create({
  headers: {
    'Content-Type': 'application/octet-stream'
  }
});

instance.post('https://api.example.com/upload', binaryData)
  .then(response => {
    console.log(response.data);
  })
  .catch(error => {
    console.error(error);
  });