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<h1 class="page-title">Source: controllers/validation.js</h1>
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<pre class="prettyprint source linenums"><code>/**
* A module to run JSON Schema based validation on request/response data.
* @module controllers/validation
* @author Miltos Skondras
* @see schemas/* for JSON Schema definition files
*/
const {Validator, ValidationError} = require('jsonschema');
const userSchema = require('../schemas/user.json').definitions.user;
const appSchema = require('../schemas/application.schema.js');
/**
* Wrapper that returns a Koa middleware validator for a given schema.
* @param {object} schema - The JSON schema definition of the resource
* @param {string} resource - The name of the resource e.g. 'article'
* @returns {function} - A Koa middleware handler taking (ctx, next) params
*/
const makeKoaValidator = (schema, resource) => {
const v = new Validator();
const validationOptions = {
throwError: true,
propertyName: resource
};
/**
* Koa middleware handler function to do validation
* @param {object} ctx - The Koa request/response context object
* @param {function} next - The Koa next callback
* @throws {ValidationError} a jsonschema library exception
*/
const handler = async (ctx, next) => {
const body = ctx.request.body;
try {
v.validate(body, schema, validationOptions);
await next();
} catch (error) {
if (error instanceof ValidationError) {
console.error(error);
ctx.body = {message: error.stack};
ctx.status = 400;
} else {
throw error;
}
}
}
return handler;
}
/** Validate data against user schema for creating new users */
exports.validateUser = makeKoaValidator(userSchema, 'user');
/** Validate data against application schema */
exports.validateApplication = makeKoaValidator(appSchema, 'application');</code></pre>
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<h2><a href="index.html">Home</a></h2><h3>Modules</h3><ul><li><a href="module-controllers_validation.html">controllers/validation</a></li><li><a href="module-helpers_database.html">helpers/database</a></li></ul><h3>Classes</h3><ul><li><a href="module-helpers_database-DatabaseException.html">DatabaseException</a></li></ul>
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Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 3.6.7</a> on Fri Nov 26 2021 03:00:19 GMT+0000 (GMT)
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