EONC

EONC is a fast Rest-Application framework for NodeJS, makes building rest applications easy. EONC framework supports endpoints (known as api's), types, global schemas and express/connect middlewares.

const eonc = require('./');
const http = require('http');
 
const app = eonc.server();
 
// gzip/deflate outgoing responses
const compression = require('compression');
app.use(compression());
 
// store session state in browser cookie
const cookieSession = require('cookie-session');
app.use(cookieSession({
    keys: ['secret1', 'secret2']
}));
 
const ep = eonc.endpoint();
 
ep.GET({
        id: "long",
        name: {
            type: "string",
            minSize: 3,
            maxSize: 15,
            onvalidate: function (type, inp) {
                return inp + " validated";
            }
        },
        date: "date?", // optional
        obj: {
            type: "object",
            optional: true,
            minOccurs: 0,
            maxOccurs: 0,
            items: {
                a: "integer",
                b: "number?",
                c: "string"
            }
        }
    },
    function (req, res) {
        res.end(JSON.stringify(req.args));
    });
 
ep.PUT("id:long; name:string(3-15); date:date?", function (req, res) {
    res.end(JSON.stringify(req.args));
});
 
 
app.use('/app/ping', ep);
 
//create node.js http server and listen on port
http.createServer(app).listen(5000);

Getting Started

EONC is a extensible framework that supports both middleware and endpoint.

Install EONC

$ npm install eonc

Create an app

The main component is a EONC "app". This will store all the middleware and endpoint added and is, itself, a function.

const app = eonc.server();

Create endpoints

Endpoints are the api's in your rest application. An endpoint can handle one, many or all http methods. EONC process type checking and converting for input parameters before calling endpoint handler.

let ep = eonc.endpoint();
 
// Endpoint will handle GET, PUT and DELETE methods
ep.GET("id:long", function (req, res) {
    res.end("Your id is " + req.args.id);
});
ep.PUT("id:long; name:string(3-15)", function (req, res) {
    res.end("Your name updated with " + req.args.name);
});
ep.DELETE("id:long", function (req, res) {
    res.end("Your id is delete");
});
app.use("/path/to/api1", ep);
 
ep = eonc.endpoint();
// Endpoint will handle all methods
ep.ALL("foo:string", function (req, res) {
    res.end(req.attr.foo);
});
app.use("/path/to/api2", ep);

Use types

Type checking and conversion is the powerful part of the EONC framework. It quaranties you will get the exact type of request parameters in your endpoint handler. Defining types is very easy.

1.Type definition objects

ep.GET(
    {
        field1: {
            type: "integer",
            optional: true,     // default false
            minValue: 1,
            maxValue: 100,      // field value must be between 1-100
            minOccurs: 0,
            maxOccurs: 10,      // this is an array field that can have 10 items max
            onvalidate: function (type, inp) {
                // custom validation handler
                return inp;
            }
        },          // Integer field
        field2: {
            type: "string",
            minSize: 3,
            maxSize: 15,        // String length must between 3 and 15
            pattern: /^\w+$/    // Value must match the regex pattern.
        },
        date: "date?",          // optional date value
        obj: {                  // Object field with 3 sub items
            type: "object",
            optional: true,
            items: {
                a: "integer",
                b: "number?",
                c: "string"
            }
        }
    },
    handler);

2.Type definition strings

ep.GET(
    {
        field1: "integer",                // Integer field
        field2: "integer[]",              // Integer array field
        field3: "integer?[1-10]",         // Optional field can have integer array that have at least 1, max 10 items
        field4: "integer(1-100)",         // Field must have integer values between 1 and 100 
        field5: "integer?(1-100)[1-10]",  // Optional array field with value range checking   
        field6: "string?(3-15)/\w+/",     // Optional string field with value pattern checking
    },
    handler);

Use global schemas

Global schemas can be used in an EONC application. This helps you define global types and use them in your endpoints.

let schema1 = eonc.schema("ns1:http://app1.anyurl.com");
schema1.define("ID", "number");
schema1.define("Name", "string(3-30)");
 
let schema2 = eonc.schema("ns2:http://app2.anyurl.com");
schema2.define("CustomType", {
    type: "object",
    items: {
        a: "number",
        b: "string",
        c: "date?"
    }
});

Once you created a schema object and define types in it, you can use that types anywhere in your application.

let ep = eonc.endpoint();
 
ep.GET("id:ns1:ID; name:ns1:Name; data:ns2:CustomType", handler);
 
 

Use middleware

The core of middleware support is extended from connect project. Take a look at connect repository for detailed use of middlewares.

Node Compatibility

• node >= 6.x;

License

MIT