README

Validate-Box

Same I18n validation on server and client for web applications.

How It Works

Validate inputs in HTML form.
Fetch response to server optionally by ajax.

Usage

JS Applications

Suitable for web apps with a great variety of forms.

Show instructions

Install by npm:
```
 $ npm install validate-box
 
```

Config

Start http server for validate request examples from client.

    const fs = require("fs"); //file system
    const url = require("url"); //url parser
    const http = require("http"); //http server
    const qs = require("querystring"); //parse post data
    const valid = require("validate-box"); //validator

    const _maxFieldsSize= 20 * 1024 * 1024; //20mb

    //create server instance
    const server = http.createServer(function(req, res) {
        let parts = url.parse(req.url.toLowerCase(), true); //parse url
        let pathname = parts.pathname; //https://example.org/abc/xyz?123 = /abc/xyz
        //Static request => res.end()
        if (pathname.indexOf("/favicon.ico") > -1)
            return res.end(); //ignore icon request
        if ((pathname.indexOf("/css/") > -1) || (pathname.indexOf("/js/") > -1))
            return res.end(fs.readFileSync(__dirname + pathname).toString());

        valid.setI18n(parts.query.lang);
        if (req.method == "POST") { //post request
            let rawData = ""; //buffer
            req.on("data", function(chunk) {
                rawData += chunk;
                if (rawData.length > _maxFieldsSize) { //20mb
                    delete rawData; //free body memory
                    req.connection.destroy(); //FLOOD ATTACK OR FAULTY CLIENT, NUKE REQUEST
                }
            });
            req.on("end", function() {
                req.body = (req.headers["content-type"] == "application/json") ? JSON.parse(rawData) : qs.parse(rawData);
                console.log("----------", "Validating", "----------");
                console.log(req.body);

                let error = {}; //err container
                let fields = req.body; //request fields
                error.name = valid.vb.size(fields.name, 1, 200) || "Field name ame tot valid";
                error.subject = valid.vb.size(fields.subject, 0, 200) || "Field subject not valid";
                error.email = (fields.email && valid.vb.email(fields.email)) || "Invalid email format";
                error.idUsuario = fields.idUsuario || "User is required";
                error.id = error.idUsuario ? valid.nb.toFloat(fields.idUsuario) : 0;
                if (error.id <= 0)
                    error.idUsuario = "User not found";
                res.end(JSON.stringify(error), "application/json", () => {
                    console.log("----------", "Results", "----------");
                    console.log("Error:", error);
                });
            });
        }
        else //get request
            res.end(fs.readFileSync("src/views/index.html"), "text/html", () => {
                console.log(req.url, "->", "src/views/index.html");
            });
    });

test

Lunch jest testing

    $ npm test

Usage no npm install needed!