Validation for REST Services built with node-restify in node.js

• node-restify-validation requires at least restify 2.6.0 since the validation model is defined in the route-object. (restify/node-restify#408)

Goal of this little project is to have the validation rules / schema as close to the route itself as possible on one hand without messing up the logic with further LOCs on the other hand.

Example:

    var server = restify.createServer();
    server.use(restify.queryParser());
    server.use(restifyValidation.validationPlugin( {
        // Shows errors as an array
        errorsAsArray: false,
        // Not exclude incoming variables not specified in validator rules
        forbidUndefinedVariables: false,
        errorHandler: restify.errors.InvalidArgumentError
    }));

    server.get({url: '/test/:name', validation: {
      resources: {
        name: { isRequired: true, isIn: ['foo','bar'] }
      },
      queries : {
        status: { isRequired: true, isIn: ['foo','bar'] },
        email: { isRequired: false, isEmail: true },
        age: { isRequired: true, isNatural: true }
      }
    }}, function (req, res, next) {
        res.send(req.params);
    });

    server.put({url: '/products/:id/labels/:label', validation: {
      resources: {
        id: { isRequired: true, isNatural: true },
        label: { isRequired: true }
      },
      queries : {
        status: { isRequired: true, isIn: ['foo','bar'] }
      },
      content: {
        label: { isRequired: true }
      }
    }}, function (req, res, next) {
        res.send(req.params);
    });

    server.listen(8001, function () {
        console.log('%s listening at %s', server.name, server.url);
    });

Simply install it through npm

npm install node-restify-validation

On top of the validation schema the node-restify-swagger library should later-on generate the swagger resources to provide a hands-on documentation.

    isRequired: true | function()
    equalTo: {'fieldName'}

Powered by node-validator.

contains
equals
is
isAfter
isAlpha
isAlphanumeric
isBefore
isBoolean
isCreditCard
isDate
isDecimal
isDivisibleBy
isEmail
isFloat
isHexColor
isHexadecimal
isIP
isIPNet
isIPv4
isIPv6
isIn
isInt
isNatural
isLowercase
isNumeric
isUUID
isUUIDv3
isUUIDv4
isUppercase
isUrl
max
min
not
notContains
notIn
notRegex
regex

All validation parameters are able to deal with functions as parameters.

For instance the parameterMatches-Condition:

module.exports.paramMatches = function (params) {
    return conditionalChecker(params, function (matches, value) {
        var result;
        if (_.isArray(matches)) {
            result = _.contains(matches, value);
        } else {
            result = _.isEqual(matches, value);
        }
        return result;
    });
};

Which will be used for instance as follows:

    var validation = isRequired: require('node-restify-validation');
    //...
    parameter: { isRequired: validation.when.paramMatches({(scope: '...',) variable: 'param1', matches: ['a', 'b']}) }

As result the parameter will only be required when param1 matches a or b. The called method will have a context (this) containing the following information:

• req: the request object
• scope: (real) current scope validation
• validationModel: the complete validation model
• validationRules: the validationRules for the current atribute
• options: the options which have initially been passed
• recentErrors: errors which have been computed until now

node-restify-validation was & is inspired by backbone.validation. In terms of validation node-restify-validation makes use of node-validator.

The MIT License (MIT)

Copyright (c) 2014 Timo Behrmann, Guillaume Chauvet

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.