Vasco Santos 711c721b03
feat: custom address filter (#116)
* feat: custom address filter

BREAKING CHANGE: Only DNS+WSS addresses are now returned on filter by default in the browser. This can be overritten by the filter option and filters are provided in the module.
2020-11-24 10:14:01 +01:00

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# js-libp2p-websockets
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[![](https://raw.githubusercontent.com/libp2p/interface-transport/master/img/badge.png)](https://github.com/libp2p/interface-transport)
[![](https://raw.githubusercontent.com/libp2p/interface-connection/master/img/badge.png)](https://github.com/libp2p/interface-connection)
> JavaScript implementation of the WebSockets module that libp2p uses and that implements the interface-transport interface
## Lead Maintainer
[Jacob Heun](https://github.com/jacobheun)
## Description
`libp2p-websockets` is the WebSockets implementation compatible with libp2p.
## Usage
## Install
### npm
```sh
> npm i libp2p-websockets
```
### Constructor properties
```js
const WS = require('libp2p-websockets')
const properties = {
upgrader,
filter
}
const ws = new WS(properties)
```
| Name | Type | Description | Default |
|------|------|-------------|---------|
| upgrader | [`Upgrader`](https://github.com/libp2p/interface-transport#upgrader) | connection upgrader object with `upgradeOutbound` and `upgradeInbound` | **REQUIRED** |
| filter | `(multiaddrs: Array<Multiaddr>) => Array<Multiaddr>` | override transport addresses filter | **Browser:** DNS+WSS multiaddrs / **Node.js:** DNS+{WS, WSS} multiaddrs |
You can create your own address filters for this transports, or rely in the filters [provided](./src/filters.js).
The available filters are:
- `filters.all`
- Returns all TCP and DNS based addresses, both with `ws` or `wss`.
- `filters.dnsWss`
- Returns all DNS based addresses with `wss`.
- `filters.dnsWsOrWss`
- Returns all DNS based addresses, both with `ws` or `wss`.
## Libp2p Usage Example
```js
const Libp2p = require('libp2p')
const Websockets = require('libp2p-websockets')
const filters = require('libp2p-websockets/src/filters')
const MPLEX = require('libp2p-mplex')
const { NOISE } = require('libp2p-noise')
const transportKey = Websockets.prototype[Symbol.toStringTag]
const node = await Libp2p.create({
modules: {
transport: [Websockets],
streamMuxer: [MPLEX],
connEncryption: [NOISE]
},
config: {
transport: {
[transportKey]: { // Transport properties -- Libp2p upgrader is automatically added
filter: filters.dnsWsOrWss
}
}
}
})
```
For more information see [libp2p/js-libp2p/doc/CONFIGURATION.md#customizing-transports](https://github.com/libp2p/js-libp2p/blob/master/doc/CONFIGURATION.md#customizing-transports).
## API
### Transport
[![](https://raw.githubusercontent.com/libp2p/interface-transport/master/img/badge.png)](https://github.com/libp2p/interface-transport)
### Connection
[![](https://raw.githubusercontent.com/libp2p/interface-connection/master/img/badge.png)](https://github.com/libp2p/interface-connection)