koa使用validator.js对参数进行验证

var validator = require('validator');
validator.isEmail('foo@bar.com'); //=> true

例如对传递的id进行校验，判读是否是数字，新建一个文件，写入以下代码：

var validator = require('validator');
var isEmpty = require('../../utils/isEmpty')
function validatorIsNumber(data) {
    let errors = {};

    if (!validator.isInt(data)) {
        errors.message = '参数类型错误'
        errors.code = 400
    }
    return {
        errors: errors,
        isValid: isEmpty(errors)
    };
}
module.exports = validatorIsNumber;

errors错误信息，isValid是否存在错误信息false代表有错误信息

使用方法：

const Router = require('koa-router');
const router = new Router();
const validatorIsNumber = require('../../../utils/validator/book.validator')
var validator = require('validator');
router.get('/v1/book/lates/:id', async (ctx, next) => {
    const params = ctx.params;
    const { errors, isValid } = validatorIsNumber('456456dsa');
    console.log(isValid)
    if (!isValid) {
        const error = new global.errs(errors.code, errors.message, errors.code);
        throw error;
    }

    ctx.body = { code: params }

})

module.exports = router

错误码列表

• 100 "continue"

• 101 "switching protocols"

• 102 "processing"

• 200 "ok"

• 201 "created"

• 202 "accepted"

• 203 "non-authoritative information"

• 204 "no content"

• 205 "reset content"

• 206 "partial content"

• 207 "multi-status"

• 208 "already reported"

• 226 "im used"

• 300 "multiple choices"

• 301 "moved permanently"

• 302 "found"

• 303 "see other"

• 304 "not modified"

• 305 "use proxy"

• 307 "temporary redirect"

• 308 "permanent redirect"

• 400 "bad request"

• 401 "unauthorized"

• 402 "payment required"

• 403 "forbidden"

• 404 "not found"

• 405 "method not allowed"

• 406 "not acceptable"

• 407 "proxy authentication required"

• 408 "request timeout"

• 409 "conflict"

• 410 "gone"

• 411 "length required"

• 412 "precondition failed"

• 413 "payload too large"

• 414 "uri too long"

• 415 "unsupported media type"

• 416 "range not satisfiable"

• 417 "expectation failed"

• 418 "I'm a teapot"

• 422 "unprocessable entity"

• 423 "locked"

• 424 "failed dependency"

• 426 "upgrade required"

• 428 "precondition required"

• 429 "too many requests"

• 431 "request header fields too large"

• 500 "internal server error"

• 501 "not implemented"

• 502 "bad gateway"

• 503 "service unavailable"

• 504 "gateway timeout"

• 505 "http version not supported"

• 506 "variant also negotiates"

• 507 "insufficient storage"

• 508 "loop detected"

• 510 "not extended"

• 511 "network authentication required"

参考：https://koa.bootcss.com/

https://blog.csdn.net/djjj123456789/article/details/81982627