使用 node sharp 包调整图像大小并上传到 s3 时，它会旋转

Question

我正在使用这个节点包：

https://www.npmjs.com/package/sharp

我使用它来调整图像大小，然后将其上传到亚马逊 S3。

可以找到大多数图像，但其中一些（我假设基于纵横比）会被旋转。

有没有办法防止这种情况或原因？

这是我正在使用的代码的副本。 imageData 是从文件上传的 s3 存储桶文件中获取的数据。 如您所见，我没有调用旋转函数。无论如何要“锁定”旋转？

module.exports.resize = function(imageData, width, fileName){
    sharp(imageData).resize(parseInt(width), null).toBuffer(function (err, data) {
        if (err) throw err;

        s3.putObject({
            Bucket: aws.bucket,
            Key: 'images/' + width + '/' + fileName,
            Body: data
        }, function (err, data) {
            if (err) {
                console.log('Failed to resize image due to an error: ' + err);
                return {
                    message: 'Failed to resize image due to an error: ' + err
                };
            } else {
                console.log('s3 image uploaded to ' + 'images/' + width + '/' + fileName);
                return {
                    message: 's3 image uploaded to ' + 'images/' + width + '/' + fileName
                };
            }
        });
    });
});

Answer 1

从 url(s3 url) 获取图像的工作代码，调整大小，然后将调整大小的图像上传到 s3

var sharp = require('sharp')
var request = require('request').defaults({encoding: null})
var s3Upload = require('./s3Upload')

module.exports = function (fileLocation) {
  request(fileLocation, function (error, response, body) {
  var fileInstance400x400 = sharp(body)
  var inst400x400 = fileInstance400x400.resize(400, 400)
  s3Upload('filename400x400', inst400X400)
  })
}
// fileLocation iabsolute url of image

s3上传模块

var aws = require('aws-sdk')
var config = require('../config')
/**
 * @param fileName: filename to be saved
 * @param file: bufferd data
 */

function defaultContentType(req, file, cb) {
  setImmediate(function () {
    var ct = file.contentType || file.mimetype || 'application/octet-stream'
    cb(null, ct);
  });
}

module.exports = function (fileName, file) {
  aws.config.update({
    accessKeyId: config.S3_CONF.access_key_id,
    secretAccessKey: config.S3_CONF.access_key,
    region: config.S3_CONF.region,
    contentType: defaultContentType,
    limits: {fileSize: 1000000, files: config.MAX_FILE_COUNT || 6}
  })

  var s3bucket = new aws.S3({params: {Bucket: config.S3_CONF.media_bucket}});

  var params = {Key: fileName, Body: file};
  // TODO setting proper header for s3
  s3bucket.upload(params, function (err, data) {
    if (err) {
      console.log('Error uploading data: ', err);
    } else {
      console.log('Successfully uploaded data to myBucket/myKey');
    }
  });

}

希望对你有帮助