HackMD/lib/web/imageRouter/s3.js

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'use strict'
const fs = require('fs')
const path = require('path')
const config = require('../../config')
const { getImageMimeType } = require('../../utils')
const logger = require('../../logger')
const AWS = require('aws-sdk')
const awsConfig = new AWS.Config(config.s3)
const s3 = new AWS.S3(awsConfig)
exports.uploadImage = function (imagePath, callback) {
if (!imagePath || typeof imagePath !== 'string') {
callback(new Error('Image path is missing or wrong'), null)
return
}
if (!callback || typeof callback !== 'function') {
logger.error('Callback has to be a function')
return
}
fs.readFile(imagePath, function (err, buffer) {
if (err) {
callback(new Error(err), null)
return
}
let params = {
Bucket: config.s3bucket,
Key: path.join('uploads', path.basename(imagePath)),
Body: buffer
}
const mimeType = getImageMimeType(imagePath)
if (mimeType) { params.ContentType = mimeType }
s3.putObject(params, function (err, data) {
if (err) {
callback(new Error(err), null)
return
}
let s3Endpoint = 's3.amazonaws.com'
if (config.s3.region && config.s3.region !== 'us-east-1') {
s3Endpoint = `s3-${config.s3.region}.amazonaws.com`
}
callback(null, `https://${s3Endpoint}/${config.s3bucket}/${params.Key}`)
})
})
}