中间件中打字稿的问题，用于nodejs express

问题描述

我有一个标准化响应的中间件。这是代码：

responses.js

const TYPE_JSON = 'application/json';
const STATUS_CODE_OK = 200;
const STATUS_CODE_CREATED_SUCCESSFULLY = 201;
const STATUS_CODE_BAD_REQUEST = 400;
const STATUS_CODE_UNAUTHORIZED = 401;
const STATUS_CODE_NOT_FOUND = 404;
const STATUS_CODE_SERVER_ERROR = 500;

const jsonOK = function (data,message) {
    const status = STATUS_CODE_OK;

    message = message ? message : 'Successful request.';

    this.status(STATUS_CODE_OK);
    this.type(TYPE_JSON);

    return this.json({ message,data,status: status });
};

const jsonCreated = function (data,message) {
    const status = STATUS_CODE_CREATED_SUCCESSFULLY;

    message = message ? message : 'Created successfully.';

    this.status(STATUS_CODE_CREATED_SUCCESSFULLY);
    this.type(TYPE_JSON);

    return this.json({ message,status: status });
}

const jsonBadRequest = function (data,message) {
    const status = STATUS_CODE_BAD_REQUEST;

    message = message ? message : 'Bad request.';

    this.status(STATUS_CODE_BAD_REQUEST);
    this.type(TYPE_JSON);

    return this.json({ message,status: status });
};

const jsonNotFound = function (data,message) {
    const status = STATUS_CODE_NOT_FOUND;

    message = message ? message : 'Not found.';

    this.status(STATUS_CODE_NOT_FOUND);
    this.type(TYPE_JSON);

    return this.json({ message,status: status });
};

const response = (req,res,next) => {
    res.jsonOK = jsonOK;
    res.jsonCreated = jsonCreated;
    res.jsonBadRequest = jsonBadRequest;

    next();
};

module.exports = response;

所以在我的控制器中，我这样称呼它：

router.get('/',(request,response) => {
   return response.jsonOK();
})

但是最近我开始将项目迁移到打字稿，所以...

import { Request,Response,NextFunction } from 'express';

const TYPE_JSON = 'application/json';
const STATUS_CODE_OK = 200;
const STATUS_CODE_CREATED_SUCCESSFULLY = 201;
const STATUS_CODE_BAD_REQUEST = 400;
const STATUS_CODE_UNAUTHORIZED = 401;
const STATUS_CODE_NOT_FOUND = 404;
const STATUS_CODE_SERVER_ERROR = 500;

const jsonOK = function (data: any,message: string) {
    const status = STATUS_CODE_OK;

    message = message ? message : 'Successful request.';

    this.status(STATUS_CODE_OK);
    this.type(TYPE_JSON);

    return this.json({ message,status: status });
};

const jsonCreated = function (data: any,message: string) {
    const status = STATUS_CODE_CREATED_SUCCESSFULLY;

    message = message ? message : 'Created successfully.';

    this.status(STATUS_CODE_CREATED_SUCCESSFULLY);
    this.type(TYPE_JSON);

    return this.json({ message,status: status });
}

const jsonBadRequest = function (data: any,message: string) {
    const status = STATUS_CODE_BAD_REQUEST;

    message = message ? message : 'Bad request.';

    this.status(STATUS_CODE_BAD_REQUEST);
    this.type(TYPE_JSON);

    return this.json({ message,status: status });
};

const jsonNotFound = function (data: any,message: string) {
    const status = STATUS_CODE_NOT_FOUND;

    message = message ? message : 'Not found.';

    this.status(STATUS_CODE_NOT_FOUND);
    this.type(TYPE_JSON);

    return this.json({ message,status: status });
};

const response = (req: Request,res: Response,next: NextFunction) => {
    res.jsonOK = jsonOK;
    res.jsonCreated = jsonCreated;
    res.jsonBadRequest = jsonBadRequest;

    next();
};

module.exports = response;

但是它抱怨很多事情，例如：

• 这个。具有任何隐式类型
在响应类型中找不到
• jsonOK，jsonCreated，jsonBadRequest

所以什么都没有了，我该如何解决？

解决方法

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