我的node.js应用程序需要将文件上传到S3。大多数情况下,它会将文件上传到现有存储桶。但有时候,需要首先创建存储桶。有没有办法检查存储桶是否已存在,如果没有,请在启动上传之前创建它?这是我到目前为止所得到的:
function uploadit () {
'use strict';
console.log('Preparing to upload the verse.')
var s3 = new AWS.S3({apiVersion: '2006-03-01'});
var uploadParams = {Bucket: 'DynamicBucketName', key: '/test.mp3', Body: myvalue, ACL: 'public-read'};
var file = 'MyVerse.mp3';
var fs = require('fs');
var fileStream = fs.createReadStream(file);
fileStream.on('error', function(err) {
console.log('File Error', err);
});
uploadParams.Body = fileStream;
var path = require('path');
uploadParams.Key = book.replace(/ /g, "")+reference.replace(/ /g, "")+"_user"+userid+".mp3";
// call S3 to retrieve upload file to specified bucket
s3.upload (uploadParams, function (err, data) {
if (err) {
console.log("Error", err);
} if (data) {
console.log("Upload Success", data.Location);
linkit();
addanother();
}
});
}
答案 0 :(得分:3)
waitFor应该能够告诉您是否存在存储桶。
var params = {
Bucket: 'STRING_VALUE' /* required */
};
s3.waitFor('bucketNotExists', params, function(err, data) {
if (err) console.log(err, err.stack); // an error occurred
else console.log(data); // successful response
});
如果存储桶不存在,则可以创建它。
希望它有所帮助。