aws lambda 上的 json 模式验证

Question

i need to validate my aws lambda event schema. i used vandium for validation. i have two diffrent cases.

1. lambda function support only one type of event.

like this

var vandium = require('vandium');

vandium.validation({
    name: vandium.types.string().required()
});

exports.handler = vandium(function (event, context, callback) {
    console.log('hello: ' + event.name);
    callback(null, 'Hello from Lambda');
});

in this case, vandium only validate , if key is present or not. But i need to check if any extra key is present or not.

2. lambda function support multiple type of events.

like this

var vandium = require('vandium');

vandium.validation({

    operation: vandium.types.string().required(),
    name: vandium.types.string().required(), });

exports.handler = vandium(function (event, context, callback) {

    const operation = event.operation;
    switch (operation) {
        case 'test1':
            test1(event);
            break;
        case 'test2':
            test2(event);
            break;

        default:
            callback(new Error("Unrecognized operation=" + operation));
            break;
    }


    function test1(event) {
        //console.log('hello: ' + event.name);
        callback(null, 'Hello from Lambda');
    }

    function test2(event) {
        //console.log('hello: ' + event.name);
        callback(null, 'Hello from Lambda');
    }

});

in this case, events for test1 & test2 are diffrent. like this

test1{"name":"hello","id":100 }

test2{"schoolName":"threni","teacher":"abcd" }

1. Which is the best scema validation npm package for problem like this?
2. is vandium is suitable for json validation.?

Answer 1

have you taken a look at ajv ? like in Validating Data With JSON-Schema

Answer 2

for those who need to validate events on aws lambda functions,@middy/validator would help.in this example case,you need to step 1:

import validator from '@middy/validator';

step2:define a schema

const schema = {
  properties: {
    body: {
      type: 'object',
      properties: {
        name: {
          type: 'string',
        },
      },
      required: ['name'],
    },
  },
  required: ['body'],
};

step3:use the validator middleware

export const handler = Your_Lambda_Function
  .use(validator({ inputSchema: schema }));