How to filter JSON objects according to "schema"

Question

I build a RESTful api with node.js and express / koa.

I want to filter the JSON data input - for security reasons as well to have only the needed business specific properties. After filtering the business-specific validation takes place.

How can I throw away unwanted JSON / JS object properties - i.e. properties not in my database schema as well as empty properties?

• Define Schema & filter according to this? Using e.g. https://github.com/alank64/json-schema-filter
• Any configurable filtering available?

Answer 1

I think joi is a good library for validation and normalization. You can also sometimes get away with something as simple as _.pick from lodash/underscore.

Answer 2

You may consider using JSON-schema validators.

http://json-schema.org/implementations.html

Validators benchmark: https://github.com/ebdrup/json-schema-benchmark

Disclaimer: I created ajv