[英]How to upload 2 image different 2 folder with NodeJs Multer?
我遇到问题并坚持如何使用 NodeJs Multer 上传 2 个图像不同的 2 个文件夹? 我使用 s3 AWS 服务将我的图像上传到存储桶
我的路线代码:
const { s3Service } = require('../../services')
module.exports = (req, res, next) => {
const controller = new Controller()
const router = new express.Router()
router.route('/createEvent').post(
s3Service.upload.single('image'),
controller.createEvent
)
我的多重代码:
const multer = require('multer')
const AWS = require('aws-sdk')
const fs = require('fs')
const s3 = new AWS.S3({
accessKeyId: process.env.BUCKET_ACCESSKEYID,
secretAccessKey: process.env.BUCKET_SECRETACCESSKEY,
endpoint: process.env.BUCKET_ENDPOINT
})
const storage = multer.diskStorage({
filename: function (req, file, cb) {
let filename = file.originalname
filename = filename.replace(/ /g, '-')
cb(null, 'event' + '-' + Date.now() + '-' + filename)
}
})
const upload = multer({
storage
})
const uploadToBucket = (fileContent, folderName, fileName, fileType) => {
const params = {
Bucket: process.env.BUCKET_NAME,
Key: folderName + '/' + fileName,
Body: fs.createReadStream(fileContent),
ContentType: fileType,
ACL: 'public-read'
}
s3.upload(params, (err, data) => {
if (err) {
console.log(err)
}
if (data) {
fs.unlinkSync(fileContent)
const url = data.Location
console.log(url)
return url
}
})
}
我的控制器创建函数:
const path = req.file.path
s3Service.uploadToBucket(path, 'events', req.file.filename, req.file.mimetype)
payload.image = {
name: req.file.filename,
url: process.env.BUCKET_EVENTSTORAGE + req.file.filename,
type: req.file.mimetype,
size: req.file.size
}
const data = await Event.create(payload)
我已经上传了 1 张图片,但只有当 eventCertified 的值为true时,我才需要上传另一张名为certificate的图片。 我卡住了,以前从未尝试过。
使用 multer,通常只需更改即可处理多个文件
从
const upload = multer({
storage
})
到
const max_files_limit=2 // whatever that meets your need
const upload = multer({storage}).array('images',max_files_limit); // 'images', the first parameter, should be the name of your fields in the HTML form,etc
// In your code it should be like this I suppose
s3Service.upload.array('images',max_files_limit)
在 multer 中间件上传你的文件后,req 对象将具有 files 属性。
您可以像那样访问多个文件
const files = req.files // simply use req.files to retreive all your files
const events_promises=[]
for(let i=0;i<req.files.length;i++){
s3Service.uploadToBucket(files[i].path, 'events', files[i].filename, files[i].mimetype)
payload.image = {
name: files[i].filename,
url: process.env.BUCKET_EVENTSTORAGE + files[i].filename,
type: files[i].mimetype,
size: files[i].size
}
events.push(Event.create(payload)) // put all your promises / async in an array
}
let events_result=Promise.all(events); // wait for all your promises to finish at once
await events_result // or events_result.then("something else");
我试图遵循您的代码逻辑,但我没有对其进行测试或模拟,如果有错字或意外错误,我们深表歉意。 在我的示例中,我将所有承诺 Event.create() 放在一个数组中,一次等待所有承诺,如果一个事件创建失败,示例中的代码将无法正确捕获它。
希望能帮助到你
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