4.6 从minio上下载文件

示例是从mio上下载pdf结尾的文件

mio操作api：https://docs.min.io/docs/javascript-client-api-reference.html#fGetObject

src/config.js

module.exports = {
    endPoint: '192.168.1.3', //这里不能带http或者https
    port: 9000,
    useSSL: false, //不需要https
    accessKey: 'G2ga7dnJxg7M24C8',
    secretKey: 'ch7by1y17ytbXZOowW9PMz2lF69mzElX'
}

src/run.js

使用promise解决异步

const config = require('./config')
const Minio = require('minio')

let connect = async (config,client) => {
    return new Promise((resolve, reject) => {
        let bucket_name = null
        client.listBuckets(function (err, buckets) {
            if (err) return console.log(err)
            for (let i in buckets) {
                if (buckets[i]['name'] === "fileinspection") {
                    bucket_name = buckets[i]['name']
                    break
                }
            }
            resolve(bucket_name)
        })
    })
}
let listObject = async (bucket_name, prefix,client) => {
    return new Promise( (resolve, reject) => {
        let list = []
        let stream = client.listObjectsV2(`${bucket_name}`, prefix, true, '')
        stream.on('data', function (obj) {
            list.push(obj)
        })
        stream.on('error', function (err) {
            console.log(err)
        })
        stream.on('end',function (obj){
            resolve(list)
        })
    })
}

let download = async (bucket_name,object_name,path,client)=>{
    return new Promise((resolve,reject)=>{
        client.fGetObject(bucket_name,object_name,path,function (err) {
            if (err){
                return console.log(err)
            }
            resolve('success')
        })
    })
}
(async () => {
    let s3Client = new Minio.Client(config);
    let bucket = await connect(config,s3Client)
    let list = await listObject(bucket,'3f5bd3b113354297bcf13ec321b18127',s3Client)
    for(let i of list){
        if(i['name'].endsWith('.pdf')){
            await download(bucket,i['name'],`/tmp/${i['name']}`,s3Client)
        }
    }
})()