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如何处理多个错误以及快速验证错误

multer amazon-s3 express amazon-web-services node.js

j roc · 技术社区 · 5 年前

我正在努力将文件上传到S3,一切正常,但在为multer设置错误处理时遇到了一些问题。

我的表单发布路径以前是这样的( listController.list__post

// routes.js


const singleUpload = upload.array("image", 3);

router.post('/list-product', singleUpload, listController.list__post)

看完文件,, https://github.com/expressjs/multer#error-handling ,我对我的代码做了这些更改,它只在处理multer错误时起作用

// routes.js


router.post("/list-product", function (req, res, next) {
  singleUpload(req, res, function (err) {
    if (err instanceof multer.MulterError) {
      console.log("error 1");
      res.render("list", {
        form: req.body,
        imgErr:
          "Please make sure your images are JPG or PNG, and less than 1024 MB each",
      });
      return;
    } else if (err) {
      console.log("error 2");
      return;
    }
    // Everything went fine.
  });
});

listController.list\u post router.post("/list-product", listController.list__post, function (req, res, next) { 即使每个字段都填写了正确的信息,express验证器也会为每个字段返回错误。

我的express验证程序代码:

// listController.js

exports.list__post = [
  body("productName")
    .trim()
    .isLength({ min: 1 })
    .withMessage("Please enter the name of your product"),
  body("productPrice").isNumeric().withMessage("Please enter a valid price"),
  body("productCategory")
    .trim()
    .isLength({ min: 1 })
    .withMessage("Please select the category of your product"),
  body("productDescription")
    .trim()
    .isLength({ min: 50 })
    .withMessage("Please enter a product discription (minimum 50 characters)")
    .isLength({ max: 150 })
    .withMessage("Maximum 300 characters"),
  body("businessName")
    .trim()
    .isLength({ min: 1 })
    .withMessage("Please enter the name of your business"),
  body("website")
    .trim()
    .isURL()
    .withMessage("Please enter the URL for your product or business"),

  // body('image')
  // im going to set up a custom validation
  // here so that I won't have to rely
  // on multer's validation, multer will
  // just be a backup/extra security

  sanitizeBody("*").escape(),

  (req, res, next) => {
    const errors = validationResult(req);
    let errArray = errors.array();
  

    if (!errors.isEmpty()) {
      console.log(errors);
      res.render("list", {
        form: req.body,
        errors: errArray,
        msg: "Please check the form for errors",
        option: req.body.productCategory,
      });
      return;
    } else {
      let product = new Product({
        business: req.body.businessName,
        productName: req.body.productName,
        category: req.body.productCategory,
        price: req.body.productPrice,
        description: req.body.productDescription,
        website: req.body.website,
        imageURL:
          "https://mybucket.s3-us-west-2.amazonaws.com/" + req.imageName,
        imageURL2:
          "https://mybucket.s3-us-west-2.amazonaws.com/" + req.imageName,
      });
      product.save(function (err) {
        if (err) {
          console.log(err);
          return next(err);
        }
        res.redirect("/list-product");
      });
    }
  },
];

请让我知道,如果我可以提供任何更多的信息或背景,谢谢期待!

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