I'm trying to make a discord bot that saves images sent to it into a folder, and I'm getting this error:
TypeError: [ERR_INVALID_ARG_TYPE]: The "data" argument must be of type string or an instance of Buffer, TypedArray, or DataView. Received undefined.
This is my code:
const Discord = require("discord.js");
const fs = require("fs");
const client = new Discord.Client();
var prefix = "."
client.on("ready", () => {
client.user.setStatus('online');
console.log("Bot is on.")
});
client.on("message", message => {
console.log(__dirname)
var image = message.attachments.first()
fs.writeFileSync(`./${image.name}`, image.file);
})
client.login(process.env.token);
Note: I'm using Discord.js v12.5.3
There is no file property on attachments. There is a url property though from where you can download the image. You can use node-fetch to fetch the file (you'll need to install it by running npm i node-fetch@2 in your command line). Once the file is fetched, you can use fs.writeFileSync().
The following code works fine:
// using discord.js v12
const { Client } = require('discord.js');
const fetch = require('node-fetch');
const fs = require('fs');
const client = new Client();
const prefix = '.';
client.on('message', async (message) => {
if (message.author.bot) return;
const image = message.attachments.first();
if (!image)
return console.log('No attached image found');
// add more if needed
const imageFiles = ['image/gif', 'image/jpeg', 'image/png', 'image/webp'];
if (!imageFiles.includes(image.contentType))
return console.log('Not an image file');
try {
const res = await fetch(image.url);
const buffer = await res.buffer();
fs.writeFileSync(`./${image.name}`, buffer);
} catch (error) {
console.log(`Error reading/writing image file:`, error);
}
});