express-form

Express Form provides data filtering and validation as route middleware to your Express applications.

Usage:

var form = require("express-form"),
    filter = form.filter,
    validate = form.validate;

var app = express.createServer();

app.configure(function() {
  app.use(express.bodyDecoder());
  app.use(app.router);
});

app.post(

  // Route
  '/user',
  
  // Form filter and validation middleware
  form(
    filter("username").trim(),
    validate("username").required().is(/^[a-z]+$/),
    filter("password").trim(),
    validate("password").required().is(/^[0-9]+$/)
  ),
  
  // Express request handler now gets filtered and validated body
  function(req, res){
    // Now we can inspect the errors!  
    if (!req.form.isValid) {
      // Handle errors
      console.log(req.form.errors);
    }
  }
);

Documentation:

Coming soon! For now, just read the source.

Installation:

npm install express-form