trim-request/index.js

Express middleware to trim all incoming request object

// trim all string prpoerties of an object
function trimStringProperties (obj) {

    if (obj !== null && typeof obj === 'object') {

        for ( var prop in obj ) {

            // if the property is an object trim it too
            if ( typeof obj[prop] === 'object' ) {
                return trimStringProperties(obj[prop]);
            } 
            
            // if it's a string remove begin and end whitespaces
            if ( typeof obj[prop] === 'string' ) {
                obj[prop] = obj[prop].trim();
            }

        }

    }

}


// trimRequest middleware: trim all request object: body, params, query
var all = function ( req, res, next ) {

    if ( req.body ) {
        trimStringProperties(req.body);
    }

    if ( req.params ) {
        trimStringProperties(req.params);
    }

    if ( req.query ) {
        trimStringProperties(req.query);
    }

    next();

}

// trimBody middleware: trim only the body object
var body = function (req, res, next) {
    if ( req.body ) {
        trimStringProperties(req.body);
    }
    next();
}

var param = function (req, res, next) {
    if ( req.params ) {
        trimStringProperties(req.params);
    }
    next();
}

var query = function (req, res, next) {
    if ( req.query ) {
        trimStringProperties(req.query);
    }
    next();
}

module.exports = {
    all: all,
    body: body,
    param: param,
    query: query
};