base64图片损坏，无法上传到S3

问题描述

router.post('/image', multipartMiddleware , function(req, res) {

   var file_name = req.body.name;
   var data = req.body.data;

   return s3fsImpl.writeFile(file_name , data , 'base64').then(function (err) {

        res.status(200).end();
    });

});

上面的代码有什么问题?我的热敏电阻没有错误，我的s3中有文件，但下载时文件已损坏.

What's wrong in my code above? There's no error in my therminal, I have the file in my s3 but it's corrupted when I download it.

推荐答案

由于我不知道代码中的s3fsImpl是什么，因此无法对您的实现进行回答，但这是使用aws的方法-sdk:

Since I don't know what s3fsImpl is in your code, I can't answer this to your implementation but here's how I would do it using aws-sdk:

const AWS = require('aws-sdk');
const s3 = new AWS.S3({apiVersion: '2006-03-01'});
const file_name = req.body.name;
const data = req.body.data;
// We need to get the format of the file from the base64 string i.e. data:image/png;base64<base64String>
const format = data.substring(data.indexOf('data:')+5, data.indexOf(';base64'));

// We need to get the actual file data from the string without the base64 prefix
const base64String = data.replace(/^data:image\/\w+;base64,/, '');
const buff = new Buffer(base64String,'base64');

s3.upload({
    Bucket:'s3-bucket-name',
    Key: file_name,
    Body: buff,
    ContentEncoding:'base64',
    ContentType:format
}, function(err, data) {
        if (err) console.log(err, err.stack); // an error occurred
        else     console.log(data);           // successful response
   });

这篇关于base64图片损坏，无法上传到S3的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！