Node.js module to validate JSON objects against a JSON Schema, including remote references ($ref).

Features

Uses tv4 for validation, but asynchronously loads missing remote schemas automatically. Just input a JSON Schema or a URI to a JSON Schema, and it will do the rest. No more manual loading of remote schemas!

Install

$ npm install --save json-schema-remote

Usage

The module can be used from a Node.js script, or directly on command line.

Module usage

Node.js ≥ 4.0.0 is required.

const validator = require('json-schema-remote');

validator.validate(data, schema)
.then(() => {
  // data is valid!
})
.catch((error) => {
  // handle error
});

Optionally, a callback can be provided as third parameter. It will be called with (error, isValid).

Command line usage

# when installed globally
json-schema-remote dataURL schemaURL
# when installed locally
./bin/json-schema-remote.js dataURL schemaURL

API

validator.validate(data, schema[, callback])

Validate a JSON against a JSON Schema.

• data is either a JSON object or the URL to a JSON object.

• schema is either a valid JSON schema or the URL to a valid JSON schema.

• callback (optional) is called when validation is finished. Signature:

  callback(error, isValid)

  • error will contain validation errors (error.errors) or be null if validation succeeded.
  • isValid is true when validation succeeded, or false otherwise.

If no callback is provided, the function returns a Promise.

validator.preload([url, ]schema)

Preload a JSON Schema so it will not be necessary to remotely load it when validating. Synchronous function.

• url can be the id of the schema. May be omitted if schema contains the id property. Otherwise, it will overwrite it.
• schema the Schema to add as JSON

Calls tv4.addSchema internally.

validator.getSchema(url)

Get a JSON Schema from tv4 cache.

• url URL/ID of the JSON Schema

Calls tv4.getSchema internally.

validator.setLoggingFunction(fn)

Set a custom Logging function. Will take console.log else. It is logged when data is loaded over the network. Throws an error if fn is no function.

Tests

mocha

Note that the tests need internet access for testing download of remote schemas.

Changelog

1.5.1

• adds new webpack build

1.5.0

• patchday with new version of validator

1.3.7

• readd meta schema on dropSchemas

1.3.6

• use packaged schema for metaSchema validation, should fix Mixed-Content warnings

1.3.5

• adds dropSchema to type definitions

1.3.4

• add option to remove all schemas from cache

1.3.3

• allow string only "jsons"
• improved require_tld logic in requests

1.3.2

• fixed infinity loop when schema has broken refs

1.3.1

• add request cache

1.3.0

• adds typescript typings

1.2.5 / 1.2.6

• fixed bufferhandling in browser with superagent

1.2.1

• updated Dependencies, fixed Tests for Chai 4

1.2.0

• adds getSchema(url)

1.1.6

• version 3.0.0 tv4-formats with fixed typescript usage

1.1.4 - 1.1.5

• bugfixes

1.1.3

• removed lodash
• split shell usage into single file

1.1.2

• updated dependencies

1.1.1

• made the feature from 1.1.0 actually work

1.1.0

• added function setLoggingFunction(fn) to add a custom logger function instead of console.log

1.0.0

• breaking change: Node.js >= 4.0.0 is required due to the usage of Promises and Arrow functions. Use [email protected] for older node versions.
• added support for Promises (callbacks still work, too)
• removed dependency on async
• updated dependencies

0.1.7

• removed deprecation caused by validator.js

0.1.6

• updated dependencies

0.1.5

• updated dependencies

0.1.4

• updated dependencies
• added mocha and mocha-bamboo-reporter to dev dependencies

0.1.3

• updated dependencies

0.1.2

• updated dependencies

0.1.1

• updated dependencies
• updated tests for chai 2.x
• updated test for remote schema and data

0.1.0

• added preload function

0.0.2

• fix for package.json file

0.0.1

• initial release

License

MIT © entrecode GmbH