koa-body-inspector

Middleware for KOA that sanitizes and validates request bodies parameters. This package is compatible with KOA's body parser packages (koa-bodyparser or koa-body) and uses schema-inspector to do the actual santization/validation.

Installation

npm install --save koa-body-inspector

Usage

The package is a namespace that provides two function calls:

{
  sanitize: function(sanitizationRules),
  validate: function(validationRules, [onError])
}

Sanitization

Call sanitize with an object defining the sanitization rules as specified by schema-inspector.

For example:

const sanitize = require('koa-body-inspector').sanitize;
const KOA = require('koa');

const app = new KOA();

const rules = {
  id: { type: 'number', optional: false, def: 123}
};

app.use(sanitize(rules));
app.post(*function() {
  console.log(this.request.body.id); // will default to the number 123
});

Validation

Call validate with an object defining the validation rules as specified by schema-inspector. By default, any validation errors will by thrown with a status of 400. To override this behavior, simply specify an onError handler that accepts a list of errors.

For example:

const validate = require('koa-body-inspector').validate;
const Koa = require('koa');

const app = new Koa();

const rules = {
  id: { type: 'number', optional: false }
};

app.use(validate(rules, onError));
app.post(*function() {
  console.log(this.request.body);
});

function onError(errors) {
  console.log(errors); // errors will contain an error for each validation rule that failed
}

Testing

In a dev environment, call npm test to run unit tests. For coverage, run npm run coverage to generate code coverage in the ./build/coverage folder.