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https://github.com/Inevio/vertigo

Blazing fast communication between Node.js processes
https://github.com/Inevio/vertigo

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Blazing fast communication between Node.js processes

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![Vertigo](https://cloud.githubusercontent.com/assets/1794673/10267561/1b0eef2e-6a99-11e5-9770-71e13744166c.png)

Blazing fast communication between Node.js processes

## How to install Vertigo
You can install Vertigo using Node Package Manager (npm):
```
npm install vertigo
```

## Features
* Supports Request/Reply communication.
* Supports Send without Reply communication.
* Supports multiple server using round robin.
* Fault tolerant: clients will reconnect to servers even if server goes down and comes back later.
* Extremely fast (disables TCP Nagle's algorithm).
* Zero dependencies on other libraries.
* Block non-desired IPs.

## Examples
### Request/Reply: Server with one client
#### Server
```js
// Modules
var vertigo = require('vertigo');

// Create server
var server = vertigo.createServer( 8000 );

// Listen petitions
server.on( 'hello', function( name, callback ){
callback( null, 'Hi ' + name + ', I am the server' );
});

```
#### Client
```js
// Modules
var vertigo = require('vertigo');

// Create client
var client = vertigo.createClient( 8000 );

// Make a petition
client.request( 'hello', 'John', function( error, response ){
console.log( 'Server says', response );
});
```

### Request/Reply: 2 server with one client (Round robin)
#### Server 1
```js
// Modules
var vertigo = require('vertigo');

// Create server
var server = vertigo.createServer( 8000 );

// Listen petitions
server.on( 'hello', function( name, callback ){
callback( null, 'Hi ' + name + ', I am the server 1' );
});

```
#### Server 2
```js
// Modules
var vertigo = require('vertigo');

// Create server
var server = vertigo.createServer( 8001 );

// Listen petitions
server.on( 'hello', function( name, callback ){
callback( null, 'Hi ' + name + ', I am the server 2' );
});

```
#### Client
```js
// Modules
var vertigo = require('vertigo');

// Create client
var client = vertigo.createClient( 8000, 8001 );

// Make a petition
client.request( 'hello', 'John', function( error, response ){
console.log( 'Server says', response );
});
```

### Send: Server with one client
#### Server
```js
// Modules
var vertigo = require('vertigo');

// Create server
var server = vertigo.createServer( 8000 );

// Listen petitions
server.on( 'hello', function( name ){
console.log( 'I received a message from ' + name );
});

```
#### Client
```js
// Modules
var vertigo = require('vertigo');

// Create client
var client = vertigo.createClient( 8000 );

// Make a petition
client.send( 'hello', 'John' );
```

### Block non-desired connections from unknown IPs
#### Server
```js
// Modules
var vertigo = require('vertigo');

// Create server
var server = vertigo.createServer(

8000,
null, // Host definition, use falsy values for autoconfiguration
[ '127.0.0.1', '192.168.1.42' ] // Accepted IPs. If it isn't defined all IPs are accepted.

);

// Listen petitions
server.on( 'hello', function( name ){
console.log( 'I received a message from ' + name );
});

```

## Migrating from hermod
You can use Vertigo safely, currently the API is the same in both libraries.

## Changelog
* 0.0.15 ( 2017/10/17 ): Removed unnecessary operation.
* 0.0.14 ( 2017/10/16 ): `'ECONNRESET'` error is triggered on client when server connection is closed.
* 0.0.13 ( 2016/08/07 ): Improved `close()` client method.
* 0.0.12 ( 2016/08/07 ): Fixed bug with `close()` client method.
* 0.0.11 ( 2016/08/01 ): Fixed little bug with reconnect delay.
* 0.0.10 ( 2016/07/31 ): Support reconnect delay. Setted 100ms as default.
* 0.0.9 ( 2016/07/24 ): Allow again create clients with `opts` object as param.
* 0.0.8 ( 2016/07/21 ): Implemented `close()` client method.
* 0.0.7 ( 2016/05/09 ): Support TLS secure connections.
* 0.0.6 ( 2015/10/04 ): Support multirequests. Improved message transmission. Renamed from Hermod to Vertigo.
* 0.0.5 ( 2014/06/26 ): Limit connections for specific IPs. Support host definition in server.
* 0.0.4 ( 2014/04/02 ): Optimized and `send()` method support.
* 0.0.3 ( 2014/04/02 ): Optimized and better documentation.
* 0.0.2 ( 2014/04/02 ): Optimized and prevent chuncked commands.
* 0.0.1 ( 2014/03/20 ): First version.

## To Do List
* `shout()` client method
* Authentication support
* Middleware support