discord.js发送带本地图片的embed消息提示Invalid Form Body如何修复

• 实例化MessageAttachment时错误传入了整个文件名数组files，而非选中的单个图片的完整路径
• MessageEmbed.setImage()方法仅接受字符串格式的资源链接，不能直接传入MessageAttachment实例，本地图片嵌入需要使用attachment://<文件名>的特殊协议格式指定
• 发送消息时没有将附件和embed一并传递，Discord无法匹配到embed引用的本地资源

const Discord = require('discord.js');
const { Intents } = Discord;
const fs = require('fs');

const config = require('config');
const authToken = config.get('authToken');

const myIntents = new Intents([
    Intents.FLAGS.GUILDS,
    Intents.FLAGS.GUILD_MESSAGES
]);
const client = new Discord.Client({ intents: myIntents });

client.on("ready", (client) => {
    console.log(`Logged in as ${client.user.tag}.`);
});

client.on("messageCreate", (message) => {
    if ('.pic' === message.content) {
        let files = fs.readdirSync('./assets/images/');
        let chosenFile = files[Math.floor(Math.random() * files.length)];
        // 传入单个选中图片的完整路径实例化附件
        const image = new Discord.MessageAttachment(`./assets/images/${chosenFile}`, chosenFile);
        const embed = new Discord.MessageEmbed()
              .setTitle('yeet')
              // 使用attachment协议指定嵌入图片
              .setImage(`attachment://${chosenFile}`)
              .setFooter('By K4STOR');
        // 发送时同时传递embed和附件数组
        message.channel.send({embeds: [embed], files: [image]});
    }
});

client.login(authToken);

内容的提问来源于stack exchange，提问作者Sky