自定义Multer存储 - 使用Sharp时非法操作

问题描述 投票:0回答:1

我正在使用MulterSharp来存储作为HTML表单一部分上传的图像。我想在将图像存储到磁盘之前调整大小并转换图像,并找到this线程,了解如何做到这一点。

我以为我已经正确设置了所有内容,但是当我尝试上传图片时,我得到了:

错误:EISDIR:对目录进行非法操作,打开'C:\ ... \ uploads'

以下是我的代码:

Routes.js:

var multer = require('multer');
var customStorage = require(path.join(__dirname, 'customStorage.js'));

var upload = multer({
    storage: new customStorage({
        destination: function (req, file, cb) {
            cb(null, path.join(__dirname, 'uploads'));
        },
        filename: function (req, file, cb) {
            cb(null, Date.now());
        }
    }),
    limits: { fileSize: 5000000 }
});
...
app.use('/upload', upload.single('file'), (req, res) => { ... });

customStorage.js:

var fs = require('fs');
var sharp = require('sharp');

function getDestination (req, file, cb) {
    cb(null, '/dev/null'); // >Implying I use loonix
};

function customStorage (opts) {
    this.getDestination = (opts.destination || getDestination);
};

customStorage.prototype._handleFile = function _handleFile(req, file, cb) {
    this.getDestination(req, file, function (err, path) {
        if (err) return cb(err);

        var outStream = fs.createWriteStream(path);
        var transform = sharp().resize(200, 200).background('white').embed().jpeg();

        file.stream.pipe(transform).pipe(outStream);
        outStream.on('error', cb);
        outStream.on('finish', function () {
            cb(null, {
                path: path,
                size: outStream.bytesWritten
            });
        });
    });
};

customStorage.prototype._removeFile = function _removeFile(req, file, cb) {
    fs.unlink(file.path, cb);
};

module.exports = function (opts) {
    return new customStorage(opts);
};
node.js multer sharp
1个回答
0
投票

错误错误:EISDIR:在此上下文中对目录的非法操作表示您将Multer的目标设置为目录,而该目录应该是目标文件的名称。

目标在Routes.js中的行cb(null, path.join(__dirname, 'uploads'));中设置。如果你把这一行改成像cb(null, path.join(__dirname, 'myDirectory\\mySubdirectory\\', myFilename + '.jpg'))这样的东西,那就行了。

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