Question

我已按照本文的说明操作，它可以作为魅力： https://aws.amazon.com/tw/blogs/compute/resize-images-on-the-fly-with-amazon-s3-aws-lambda-and-amazon-api-gateway/

而不是文章中调整大小的图像路径格式：http://YOUR_BUCKET_WEBSITE_HOSTNAME_HERE/300x300/blue_marble.jpg

我希望它是： http://YOUR_BUCKET_WEBSITE_HOSTNAME_HERE/blue_marble_300.jpg

所以我修改了index.js并上传了新函数，如下所示：

'use strict';

const AWS = require('aws-sdk');
const S3 = new AWS.S3({
    signatureVersion: 'v4',
});
const Sharp = require('sharp');

const BUCKET = process.env.BUCKET;
const URL = process.env.URL;

exports.handler = function(event, context, callback) {
    const key = event.queryStringParameters.key;
    const match = key.match(/([A-Za-z0-9/]*)((_\d+)?.([A-Za-z0-9/]*))$/);
    const size = match[2].split('.')[0].replace("_", "");
    let originalKey = key.replace("_" + size, "");
    console.log(originalKey);
    console.log(size);

    S3.getObject({ Bucket: BUCKET, Key: originalKey }).promise()
        .then(data => Sharp(data.Body)
            .resize(size, size)
            .toFormat('png')
            .toBuffer()
        )
        .then(buffer => S3.putObject({
            Body: buffer,
            Bucket: BUCKET,
            ContentType: 'image/png',
            Key: key,
        }).promise())
        .then(() => callback(null, {
            statusCode: '301',
            headers: { 'location': `${URL}/${key}` },
            body: '',
        }))
        .catch(err => callback(err));
}

但如果失败则显示错误消息：

{"message": "Internal server error"}

我应该如何实现这个并进行调试？顺便说一下，我检查了它显示的云监视日志

Syntax error in module 'index': SyntaxError
at Module.load (module.js:487:32)
at tryModuleLoad (module.js:446:12)
at Function.Module._load (module.js:438:3)
at Module.require (module.js:497:17)
at require (internal/module.js:20:19)

使用Amazon Lambda动态调整图像大小

0 个答案: