An express.js middleware for node-validator.
This is basically a copy of a gist by node-validator author chriso.
npm install express-validator
var express = require('express'),
expressValidator = require('express-validator'),
app = express.createServer();
app.use(express.bodyParser());
app.use(expressValidator);
app.post('/:urlparam', function(req, res) {
var errors = [];
req.onValidationError(function(msg) {
console.log('Validation error: ' + msg);
errors.push(msg);
return this;
});
req.assert('postparam', 'Invalid postparam').notEmpty().isInt();
req.assert('getparam', 'Invalid getparam').isInt();
req.assert('urlparam', 'Invalid urlparam').isAlpha();
req.sanitize('postparam').toBoolean();
if (errors.length) {
res.send('There have been validation errors: ' + errors.join(', '), 500);
return;
}
res.json({
urlparam: req.param('urlparam'),
getparam: req.param('getparam'),
postparam: req.param('postparam')
});
});
app.listen(8888);Which will result in:
$ curl -d 'postparam=1' http://localhost:8888/test?getparam=1
{"urlparam":"test","getparam":"1","postparam":true}
$ curl -d 'postparam=1' http://localhost:8888/t1est?getparam=1
There have been validation errors: Invalid urlparam
$ curl -d 'postparam=1' http://localhost:8888/t1est?getparam=1ab
There have been validation errors: Invalid getparam, Invalid foo
You can extend the Validator and Filter objects to add custom validation
and sanitization methods:
var expressValidator = require('express-validator');
expressValidator.Filter.prototype.toLowerCase = function(){
this.modify(this.str.toLowerCase());
return this.str;
};- Readme update
- Expose Filter and Validator instances to allow adding custom methods
- Use req.param() method to get parameter values instead of accessing req.params directly.
- Remove req.mixinParams() method.
- Initial release
- Christoph Tavan [email protected] - Wrap the gist in an npm package
Copyright (c) 2010 Chris O'Hara [email protected], MIT License