node.js - 从 URL 获取图像到 S3

Question

目标是让 AWS lambda 每天将特定的 jpg 从 URL 复制到 S3 存储桶。这看起来是一个 super 简单的 lambda 函数，但它就是不起作用。我将此设置为本地 NPM 项目，然后将压缩文件上传到 AWS lambda 控制台。下面的代码运行没有错误，但不复制图像。任何帮助将不胜感激。

"use strict";

const AWS = require("aws-sdk");
const Jimp = require("jimp");
const s3 = new AWS.S3();
const imageType = "image/jpeg";
const bucket = 'mybucket';

exports.handler = (event, context, callback) => {
    let objectKey = 'myimage.jpg';

    Jimp.read('sampleURL.com/image.jpg')
    .then(image => {
        s3.putObject({
            Bucket: bucket,
            Key: objectKey,
            Body: image,
            ContentType: imageType
        })
    })
    .catch(err => {
        // Handle an exception.
    });


};

AWS CloudWatch 日志

2019-10-24T12:48:23.105Z    bac7d80e-5544-4ea5-ae12-478281338389    INFO    { Error: Could not find MIME for Buffer <null>
    at Jimp.parseBitmap (/var/task/node_modules/@jimp/core/dist/utils/image-bitmap.js:120:15)
    at Jimp.parseBitmap (/var/task/node_modules/@jimp/core/dist/index.js:506:32)
    at /var/task/node_modules/@jimp/core/dist/index.js:448:15
    at /var/task/node_modules/@jimp/core/dist/index.js:176:14
    at /var/task/node_modules/@jimp/core/dist/request.js:66:9
    at IncomingMessage.<anonymous> (/var/task/node_modules/phin/lib/phin.compiled.js:1:2100)
    at IncomingMessage.emit (events.js:203:15)
    at IncomingMessage.EventEmitter.emit (domain.js:448:20)
    at endReadableNT (_stream_readable.js:1145:12)
    at process._tickCallback (internal/process/next_tick.js:63:19) methodName: 'constructor' }
END RequestId: bac7d80e-5544-4ea5-ae12-478281338389
REPORT RequestId: bac7d80e-5544-4ea5-ae12-478281338389  Duration: 612.63 ms Billed Duration: 700 ms Memory Size: 128 MB Max Memory Used: 97 MB  Init Duration: 557.69 ms    

Answer 1

如果这对其他人有帮助，则需要将图像写入缓冲区。以下行修复了它:

const buffer = await image.getBufferAsync(imageType);

然后缓冲区用于 S3 Body 参数。所以完整的脚本是:

    "use strict";

    const AWS = require("aws-sdk");
    const Jimp = require("jimp");
    const s3 = new AWS.S3();
    const imageType = "image/jpeg";
    const bucket = 'bucketxzy';

    exports.handler = async (event, context) => {
        let objectKey = 'sampleimage.jpeg';
        const image = await Jimp.read('https://www.sampleurl.com/sampleimage.jpg/');
        const buffer = await image.getBufferAsync(imageType);

        return s3.putObject({
            Bucket: bucket,
            Key: objectKey,
            Body: buffer,
            ContentType: imageType
        }).promise();


    };