Nodejs - 捕捉多個文件大小錯誤

Question

我使用此代碼「multer」將文件上傳到我的服務器。即使我有限制filesize它只是忽略它並上傳文件。

const multer = require("multer"); 
const path = require("path"); 
const storage = multer.diskStorage({ 
    destination: function (req, file, cb) { 
     cb(null, "uploads/"); 
    }, 
    limits: { 
     fileSize: 1024 * 1024 
    } 
}); 

const upload = multer(
{ 
    storage: storage 
} 
).single("file"); 

router.post("/files/postfile", function (req: any, res: any, next) { 

    upload(req, res, function (err) { 
     if (err) { 
      return res.json({error: err}); 
     } 
     return res.json({success: true}); 
    }); 

}); 

Answer 1

const upload = multer({ 
    storage: storage, 
    limits: { 
     fileSize: 1024 * 1024 
    } 
}).single("file"); 

取出limits從multer.diskStorage

Answer 2

你的代碼是非常低效的。

const multer = require("multer"); 
const path = require("path"); 
const storage = multer.diskStorage({ 
    destination: function (req, file, cb) { 
     cb(null, "uploads/"); 
    } 
}); 

const upload = multer({ 
    storage: storage, 
    limits: { 
     fileSize: 1024 * 1024 
    } 
}); 

router.post("/files/postfile", upload.single("file"); function (req: any, res: any, next) { 
    // . . . . code . . . . 

}); 

通過使用中間件，你可以寫高效的代碼 我推薦這種方法。 如果在調用multer.diskStorage（）時使用filename屬性，則可以創建文件名chage。

destination: function (req, file, cb) { 
     cb(null, "uploads/"); 
    }, 
    filename: function(req, file, cb){ 
     cb(null, 'unique_name.jpg'); # example: timestamp, utc, etc 
    }, 
    limits: { 
     fileSize: 1024 * 1024 
    } 

文件名可以重複。