Question

我正在处理node.js服务器应用程序中的请求错误处理。我已经定义了一个处理这些错误的回调函数：

app.use(function errorHandler(err, req, res, next) {    
    res.send(err, {status: err, message: 'error'}); 

  }
);

这对我作为开发人员来说很好，因为它会打印出这样的堆栈跟踪：

{
"status": {
  "stack": "Error\\\n    at MongooseError.ValidationError (/home/osboxes/skipodium_rest_server/node_modules/mongoose/lib/error/validation.js:22:16)\\\n    at model.Document.invalidate (/home/osboxes/skipodium_rest_server/node_modules/mongoose/lib/document.js:1216:32)\\\n    at /home/osboxes/skipodium_rest_server/node_modules/mongoose/lib/document.js:1090:18\\\n    at validate (/home/osboxes/skipodium_rest_server/node_modules/mongoose/lib/schematype.js:653:7)\\\n    at /home/osboxes/skipodium_rest_server/node_modules/mongoose/lib/schematype.js:681:9\\\n    at Array.forEach (native)\\\n    at SchemaString.SchemaType.doValidate (/home/osboxes/skipodium_rest_server/node_modules/mongoose/lib/schematype.js:658:19)\\\n    at /home/osboxes/skipodium_rest_server/node_modules/mongoose/lib/document.js:1088:11\\\n    at process._tickCallback (node.js:415:13)",
  "message": "User validation failed",
  "name": "ValidationError",
  "errors": {
    "email": {
      "properties": {
        "regexp": {},
        "type": "regexp",
        "message": "Path `{PATH}` is invalid ({VALUE}).",
        "path": "email",
        "value": "test@exa@mple.com"
      },
      "stack": "Error\\\n    at MongooseError.ValidatorError (/home/osboxes/skipodium_rest_server/node_modules/mongoose/lib/error/validator.js:25:16)\\\n    at validate (/home/osboxes/skipodium_rest_server/node_modules/mongoose/lib/schematype.js:652:13)\\\n    at /home/osboxes/skipodium_rest_server/node_modules/mongoose/lib/schematype.js:681:9\\\n    at Array.forEach (native)\\\n    at SchemaString.SchemaType.doValidate (/home/osboxes/skipodium_rest_server/node_modules/mongoose/lib/schematype.js:658:19)\\\n    at /home/osboxes/skipodium_rest_server/node_modules/mongoose/lib/document.js:1088:11\\\n    at process._tickCallback (node.js:415:13)",
      "message": "Path `email` is invalid (test@exa@mple.com).",
      "name": "ValidatorError",
      "kind": "regexp",
      "path": "email",
      "value": "test@exa@mple.com"
    }
  }
},
"message": "error"
}

但是，我希望以生动，用户友好的格式显示生产版本，而不会泄漏整个堆栈跟踪。现在我可以在每个请求处理函数中指定错误状态和消息，但是仍然存在特定信息，如上所述，输入的电子邮件无效，并且我不想手动为每个字段键入它由验证员检查。是否有任何现有的样板供我使用？

Answer 1

Mongoose验证错误是一个难以处理的问题。我的一般方法是只采取第一个错误（让用户一次处理一个错误）并发送路径和消息，因为其余部分确实为非开发人员提供了更多额外的意义。

first = err.errors[Object.keys(err.errors)[0]]
res.send({
    path: first.path,
    message: first.message
});

我还建议您使用自定义API样式的错误格式，以便对所有错误采用这种格式 - 这样可以使维护更加轻松。

我有一套我依赖的预定义错误模板 - 这里是一个。

// If the client missed a required parameter
exports.missingParam = function (res, domain, param) {
   res.status(400).send({
      status: "failed",
      errors: [
         {
            status: "400",
            domain: domain,
            reason: "required",
            message: "Required parameter: "+param,
            locationType: "parameter",
            location: param
         }
      ]
   });
}

node.js中的生产质量错误处理

1 个答案: