無法使用 discord.js 發送圖像緩沖區附件

Question

我有一個 bot 命令，我在其中訪問 Wolfram Alpha API 以返回圖像並回答用戶提出的問題，但由於某種原因，圖像緩沖區未定義，使用時出現以下錯誤命令

C:\Users\ACER PREDATOR 300\Desktop\MathBot\node_modules\discord.js\src\util\DataResolver.js:127
    throw new TypeError('REQ_RESOURCE_TYPE');
          ^

TypeError [REQ_RESOURCE_TYPE]: The resource must be a string, Buffer or a valid file stream.
    at Function.resolveFile (C:\Users\ACER PREDATOR 300\Desktop\MathBot\node_modules\discord.js\src\util\DataResolver.js:127:11)
    at Function.resolveFile (C:\Users\ACER PREDATOR 300\Desktop\MathBot\node_modules\discord.js\src\structures\MessagePayload.js:257:41)
    at C:\Users\ACER PREDATOR 300\Desktop\MathBot\node_modules\discord.js\src\structures\MessagePayload.js:222:85
    at Array.map (<anonymous>)
    at MessagePayload.resolveFiles (C:\Users\ACER PREDATOR 300\Desktop\MathBot\node_modules\discord.js\src\structures\MessagePayload.js:222:56)
    at TextChannel.send (C:\Users\ACER PREDATOR 300\Desktop\MathBot\node_modules\discord.js\src\structures\interfaces\TextBasedChannel.js:175:50)       
    at Object.execute (C:\Users\ACER PREDATOR 300\Desktop\MathBot\commands\misc\ask.js:40:25)
    at Object.execute (C:\Users\ACER PREDATOR 300\Desktop\MathBot\events\messageCreate.js:159:12)
    at Client.<anonymous> (C:\Users\ACER PREDATOR 300\Desktop\MathBot\bot.js:41:35)
    at Client.emit (node:events:538:35) {
  [Symbol(code)]: 'REQ_RESOURCE_TYPE'
}

這是我的機器人命令的代碼

/**
 * @type {import('../../typings').LegacyCommand}
 */

const { MessageAttachment } = require("discord.js");
const WolframAlphaAPI = require('wolfram-alpha-api');
const waApi = WolframAlphaAPI('API-KEY-REMOVED-FOR-QUESTION');

// Make a getImage function
function getImage(question) {
    // Returns the buffer of the image
    waApi.getSimple(question).then((url) => {
        // Extract the base64 string from the url
        const sfbuff = new Buffer.from(url.split(",")[1]);

        // Convert the base64 string to base64
        const base64 = sfbuff.toString('base64');

        // Convert the base64 to a buffer
        const buffer = Buffer.from(base64, 'base64');

        return buffer;
    });
}

module.exports = {
    name: "ask",
    // Refer to typings.d.ts for available properties.

    execute(message, args) {

        // Get the question from the args
        let question = args.join(" ");

        // Using the getImage function, get the image of the answer.
        const buffer = getImage(question);
        const imageAttachment = new MessageAttachment(buffer, "image-attachment.png");

        // Send the image
        message.channel.send({
            content: `Image:\n⁣`,
            files: [
                { attachment: imageAttachment }
            ]
        });
    },
};

我已經提取了 base64 字符串並將其放入在線 imageToBase64 轉換器中，它確實可以工作，但我似乎無法將其正確轉換為緩沖區。 我懷疑這可能與處理時間有關，但我可能是錯的。

任何幫助將不勝感激，謝謝。

Answer 1

getImage返回一個承諾，但您沒有正確處理它我會以這種方式更改代碼：

 /**
 * @type {import('../../typings').LegacyCommand}
 */

const { MessageAttachment } = require("discord.js");
const WolframAlphaAPI = require('wolfram-alpha-api');
const waApi = WolframAlphaAPI('API-KEY-REMOVED-FOR-QUESTION');

// Make a getImage function
function getImage(question) {
    // Returns the promise
    return waApi.getSimple(question);
}

module.exports = {
    name: "ask",
    // Refer to typings.d.ts for available properties.

    execute(message, args) {

        // Get the question from the args
        let question = args.join(" ");

        // Using the getImage function, get the image of the answer.
        const buffer = getImage(question).then((url) => {
            // Extract the base64 string from the url
            const sfbuff = new Buffer.from(url.split(",")[1]);
    
            // Convert the base64 string to base64
            const base64 = sfbuff.toString('base64');
    
            // Convert the base64 to a buffer
            const buffer = Buffer.from(base64, 'base64');
    
            const imageAttachment = new MessageAttachment(buffer, "image-attachment.png");

            // Send the image
            message.channel.send({
                content: `Image:\n⁣`,
                files: [
                    { attachment: imageAttachment }
                ]
            });
        })
    },
};