重命名上传的文件nodejs和multer

Question

Multer中的文件名问题

我使用express.js和multer将图像上传到服务器。我的行为是这样的：

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'); 

但问题是，从来没有文件名称的变化。 我的上传处理程序：

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}); 
      }); 
     }); 
    } 
} 

将文件保存到正确的目录名称为“blobid0.jpeg”，“blobid1.png”等等... 什么是我的错？

Answer 1

这里是我上传任何文件（pdf，txt，png）到server.Hope的代码，这将帮助你。

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); 
     }); 
    });