joi-dataURI v1.0.0

Adds a validator for dataURIs to Joi ( joi.dataURI().mediatype([mediatype]) ).

a quick example

const joiDataUri = require('joi-dataURI')
const Joi = require('joi').extend(joiDataUri)

let exampleData = (new Buffer('hello world')).toString('base64')
let mimetype = 'text/plain'

let exampleDataURI = 'data:' + mimetype + ';base64,' + exampleData

Joi.dataURI().validate(exampleDataURI)
/**
{ error: null,
  value: 'data:text/plain;base64,aGVsbG8gd29ybGQ=' }
**/

Joi.dataURI().base64().mediatype('text/plain').validate(exampleDataURI)
/**
{ error: null,
  value: 'data:text/plain;base64,aGVsbG8gd29ybGQ=' }
**/

As expected, a valid data URI (matching our constraints) passes!

But the same will be rejected if we specify the wrong mediatype:

Joi.dataURI().base64().mediatype('text/csv').validate(exampleDataURI)
/**
{ error:
   { ValidationError: "value" needs to have provided mediatype
       at Object.exports.process (/SomePath/joi-dataURI/node_modules/joi/lib/errors.js:154:19)
       at _validateWithOptions (/SomePath/joi-dataURI/node_modules/joi/lib/any.js:601:31)
       at validate (/SomePath/joi-dataURI/node_modules/joi/lib/any.js:616:21)
       at repl:1:46
       at REPLServer.defaultEval (repl.js:272:27)
       at bound (domain.js:280:14)
       at REPLServer.runBound [as eval] (domain.js:293:12)
       at REPLServer.<anonymous> (repl.js:441:10)
       at emitOne (events.js:101:20)
       at REPLServer.emit (events.js:188:7)
     isJoi: true,
     name: 'ValidationError',
     details: [ [Object] ],
     _object: 'data:text/plain;base64,aGVsbG8gd29ybGQ=',
     annotate: [Function] },
  value: 'data:text/plain;base64,aGVsbG8gd29ybGQ=' }
**/

tests

More examples are in tests.

After installing, run tests with npm test.