重命名上载的文件nodejs和multer

Question

problem with file name in Multer

i am using express.js and multer to upload images to server. i act like this:

var storage = multer.diskStorage({
        destination: function (req, file, callback) {
            callback(null, "../client/member/upload");
        },
        filename: function (req, file, callback) {
            console.log('1', 1);
            callback(null, file.fieldname + "_" + Date.now() + "_" + file.originalname);
        }
    });
    var upload = multer({ storage : storage}).single('userPhoto');

but the problem is that never file name changes. my uploader handler:

function memberUpload(request, response) {

    var storage = multer.diskStorage({
        destination: function (req, file, callback) {
            callback(null, "../client/member/upload");
        },
        filename: function (req, file, callback) {
            console.log('1', 1);
            callback(null, file.fieldname + "_" + Date.now() + "_" + file.originalname);
        }
    });
    var upload = multer({ storage : storage}).single('userPhoto');

    var folderName = path.join(__dirname, '../', 'client/member/upload');

    if (!fs.existsSync(folderName)) {
        fs.mkdir(folderName, function (err) {
            if (err) {
                return response.status(500).send(err);
            }
            else {
                upload(request, response, function (err) {
                    if (err) {
                        return response.status(400)
                            .send('No files were uploaded.');
                    }
                    var sentFile = request.files.file,
                        fileName = (request.files.file && request.files.file.name) ? request.files.file.name : 'test';

                    sentFile.mv(path.join(__dirname, '../', 'client/member/upload/', fileName), function (err) {
                        mime.lookup(path.join(__dirname, '../', 'client/member/upload/', fileName));         // => 'text/plain'
                        if (err) {
                            return response.status(500)
                                .send(err);
                        }
                        response.send({'location': '../member/upload/' + fileName});
                    });
                });
            }
        });
    }
    else {
        upload(request, response, function (err) {
            if (err) {
                return response.status(400)
                    .send('No files were uploaded.');
            }
            var sentFile = request.files.file,
                fileName = (request.files.file && request.files.file.name) ? request.files.file.name : 'test';

            sentFile.mv(path.join(__dirname, '../', 'client/member/upload/', fileName), function (err) {
                mime.lookup(path.join(__dirname, '../', 'client/member/upload/', fileName));         // => 'text/plain'
                if (err) {
                    return response.status(500)
                        .send(err);
                }
                response.send({'location': '../member/upload/' + fileName});
            });
        });
    }
}

the file save into correct directory with name "blobid0.jpeg", "blobid1.png" and so on ... what is my fault?

Answer 1

Here is my code for uploading any file(pdf, txt, png) to server.Hope this will help you.

exports.saveMedia = ((req, res) => {
        const storage = multer.diskStorage({
            destination: (req, file, callback) => {
                callback(null, (config.const.path.base + config.const.path.productReviewMedia));
            },
            filename: (req, file, callback) => {
                callback(null, Date.now() + '-' + file.originalname);

            }
        });

        const upload = multer({storage: storage}).any('file');

        upload(req, res, (err) => {
            if (err) {
                return res.status(400).send({
                    message: helper.getErrorMessage(err)
                });
            }
            let results = req.files.map((file) => {
                return {
                    mediaName: file.filename,
                    origMediaName: file.originalname,
                    mediaSource: 'http://' + req.headers.host + config.const.path.productReviewMedia + file.filename
                }
            });
            res.status(200).json(results);
        });
    });