# WebSockets

Created for the need of low latency and high bandwidth web app traffic like that of social media chat windows. 

WebSocket features:

* Full duplex (send and rec simultaneously)
* Uses HTTP proto and port 443/80
* ws\:// (websocket) and wss\:// (secure websocket)
* no polling, send when you have data.

### Basic WS usage:

{% tabs %}
{% tab title="Connect" %}

```javascript
var ws=new WebSocket('ws://<WebsocketServerURL>');
```

{% endtab %}

{% tab title="Sending Message" %}

```javascript
ws.onopen=function(e){
alert("Conenction Made");
this.send('<Your message>');
)
```

{% endtab %}

{% tab title="Receive Message" %}

```
ws.onmessage=function(e){
alert("Recieved Message");
var msg=e.data;
alert(msg);
}
```

{% endtab %}
{% endtabs %}

{% hint style="danger" %}
WebSockets themselves are not insecure but they do fall victim to vulnerabilities in how the data is used if unsanitized. &#x20;
{% endhint %}


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