README
AnySocket
An abstract networking layer over multiple transports, client/server agnostic with support for E2EE
Important
This is a work in progress and API is subject to change.
WIP Documentation
Features
- Client / Server agnostic
- Support for request/reply
- Custom AUTH method
- E2EE between peers with forward secrecy
- RPC support
- P2P using a proxy server (with support for direct E2EE between peers)
- Binary support (see:
AnySocket.Packer
) - Browser support - 31kb footprint (see:
/dist/anysocket.browser.js
) - Multiple transports *(implemented atm: ws/wss, http/https)
- All peers have a UUIDv4 associated
- Disconnect detection using a heartbeat
- Not Battle Tested ...yet
** http transport is experimental
Info: Binary RPC arguments and responses are auto packed/unpacked (AnySocket.Packer.pack
/AnySocket.Packer.unpack
).
Benchmark
nodejs - browser
Running PLAIN TEXT benchmark: 5518.838ms (test duration)
Latency: 0.86 ms
Running E2EE benchmark: 5986.633ms (test duration)
Latency: 1.06 ms
nodejs - nodejs
Running PLAIN TEXT benchmark: 5010.484ms (test duration)
Latency: 0.67 ms
Running E2EE benchmark: 5003.755ms (test duration)
Latency: 0.92 ms
You can run the benchmarks from: /examples/benchmark
Installation
npm install --save anysocket
or
<script src="/dist/anysocket.browser.js"></script>
or (if using AnySocketHTTP)
<script src="@anysocket"></script>
How to use
The following example starts a websocket server on port 3000.
const AnySocket = require("anysocket");
const server = new AnySocket();
const PORT = 3000;
server.listen("ws", PORT)
.then(() => {
console.log("Listening on port:", PORT);
})
.catch((err) => {
console.error("Failed to start server:", err);
});
server.on("connected", (peer) => {
console.log("Connected", peer.id);
peer.send({
hello: "world"
});
});
server.on("message", (packet) => {
console.log("From:", packet.peer.id, "Message:", packet.msg);
});
server.on("disconnected", (peer, reason) => {
console.log("Disconnected", peer.id, "Reason:", reason);
});
The following example connects to a websocket on port 3000
const AnySocket = require("anysocket");
const client = new AnySocket();
const PORT = 3000;
client.connect("ws", "127.0.0.1", PORT)
.then(() => {
// note: you cannot send messages from here, you need to wait for the "connected" event
console.log("Connected to server");
})
.catch((err) => {
console.error("Failed to connect to server:", err);
});
// after negotiating the AUTH packet, it will trigger the connect event
client.on("connected", (peer) => {
console.log("Connected", peer.id);
peer.send({
hello: "world"
});
});
client.on("message", (packet) => {
console.log("From:", packet.peer.id, "Message:", packet.msg);
});
client.on("disconnected", (peer, reason) => {
console.log("Disconnected", peer.id, "Reason:", reason);
});
More in the examples
folder.
Api
Documentation
AnySocket()
Creates a new AnySocket instance
AnySocket.id
Unique identifier (UUIDv4) that will be used for all connections originating this instance (client/server)
AnySocket.http
See: AnyHTTPRouter
AnySocket.server(scheme, options)
Alias for AnySocket.listen()
AnySocket.listen(scheme, options)
Attaches a new server transport based on the selected *scheme
Arguments:
scheme
- one of the implemented transportsoptions
- one of the options belowport
- port numberjson
{
ip: "0.0.0.0", // listening ip
port: 3000, // listening port
authTimeout: 5 * 1000, // auth timeout
e2eTimeout: 5 * 1000, // e2e timeout
replyTimeout: 30 * 1000, // reply timeout
heartbeatInterval: 5 * 1000 // heartbeat interval
}
Returns a Promise that resolves/rejects when the server has started listening or when it throws an error
AnySocket.connect(scheme, ip, port, [options])
Connects to AnySocket Server
Arguments:
scheme
- one of the implemented transportsip
- server ipport
- server portoptions
- options json
{
authTimeout: 5 * 1000, // auth timeout
e2eTimeout: 5 * 1000, // e2e timeout
replyTimeout: 30 * 1000, // reply timeout
heartbeatInterval: 5 * 1000 // heartbeat interval
}
Returns a Promise that resolves/rejects when a connection has been established
client.connect("ws", "127.0.0.1", 3000).then(peer => {
console.log("Connection established to peer", peer.id);
peer.send("Hello World");
}).catch(reason => {
console.log("Couldn't connect! Reason:", reason);
});
AnySocket.stop()
Stops all servers and disconnects all peers
Returns a Promise that resolves/rejects when finished
AnySocket.onAuth(packet)
You can overwrite this function to implement a custom auth validation. Arguments:
packet
- A JSON containing the Peer AnySocket.id and the custom AnySocket.authPacket
Returns true/false if validation passed or not
note: onAuth must be implemented in both server & client
AnySocket.authPacket()
You can overwrite this function to implement a custom auth packet.
Returns a JSON containing the AUTH packet that will be validated in AnySocket.onAuth()
note: auth packet must be implemented in both server & client
AnySocket.broadcast(message, [awaitReply])
Broadcasts a message to all connected peers
Arguments:
message
- a JSON stringifiable objectawaitReply
- set to true if a reply is expected (optional) - default: false
Returns a Promise that resolves with a AnyPacket if waiting for a reply or rejects on error
note: it doesn't resolve if awaitReply is not set
AnySocket.setRPC(rpc)
This sets the RPC functions on the AnySocket object so they can be called using AnyPeer.rpc RPC object can be nested indefinitely, but the "this" object will always be the called method's parent
Each RPC function can return a value, object, Buffer/TypedArray or a Promise (awaits the promise to be resolved)
Binary info:
- If a RPC receives an argument as a Buffer/TypedArray it will be auto unpacked
- If a RPC returns a Buffer/TypedArray it will be auto packed
Arguments:
rpc
- object or class with RPC functions
Any throwed error / reject will be sent back to the client in the form:
{
error: "error message",
code: 500
}
AnySocket.canProxy(peerID, otherPeerID)
Checks if peerID can be proxied through otherPeerID. Defaults to: false
note: You need to override this function in order to allow proxying
Returns true/false
AnySocket.hasPeer(id)
note: returns true for proxies
Returns true/false
if AnySocket has a peer with the id
AnySocket.hasDirectPeer(id)
note: returns false for proxies
Returns true/false
if AnySocket has a direct peer (no proxy) with the id
AnySocket.proxy(peerID, throughPeerID)
Send a proxy request for peerID via throughPeerID as relay
note: A proxied peer uses the same flow as a new connection
Returns a Promise that resolves with a AnyPeer or rejects if proxy fails
connected
AnySocket event Emitted when the link has been established and it's ready for sending/receiving messages
Arguments:
peer
- AnyPeer instance
message
AnySocket event Emitted when a message is received
Arguments:
packet
- AnyPacket instance
e2e
AnySocket event Emitted when the link has been end-to-end encrypted and it's ready to be used
Arguments:
peer
- AnyPeer instance
disconnected
AnySocket event Emitted when a peer has disconnected
Arguments:
peer
- AnyPeer instancereason
- a string detailing the disconnect reason
AnyPacket()
Constructor should not be used directly
AnyPacket.seq
An incremental unique identifier per packet per peer (used internally)
AnyPacket.peer
An AnyPeer instance
AnyPacket.msg
An object that contains data sent/received from a peer
AnyPacket.reply(message)
Sends a reply to the current packet
Arguments:
message
- a JSON stringifiable object
note: you can only reply to a normal message, you cannot reply to a reply packet. It fails silently
AnySocket.Packer.pack(bytes)
Packs the bytes
Arguments:
bytes
- Buffer/TypedArray
Returns a string representation of the bytes
AnySocket.Packer.unpack(bytes)
Unpacks the bytes
Arguments:
bytes
- String representation of a Buffer/TypedArray
Returns a Buffer/TypedArray
AnyPeer()
Constructor should not be used directly
AnyPeer.id
Unique peer identifier (UUIDv4) - Peer AnySocket.id
AnyPeer.connectionID
Unique connection identifier (UUIDv4), used internally before getting a AnyPeer.id
AnyPeer.rpc(...args)
This is a special Proxy Object that can indefinitely nested and have any number of arguments
Example: peer.rpc.hello.world.user("LynxAegon")
- This will try to run a RPC on the peer and the RPC object should look like this:
AnySocket.setRPC({
hello: {
world: {
user: (name) => {
return new Promise((resolve, reject) => {
resolve("Hello World, " + name);
});
}
}
}
})
Returns a Promise that will resolve if success or reject in case of error
AnyPeer.e2e()
Enables E2E encryption using ECDH for exchange and then switches to AES-256-CBC with forward secrecy.
Each message is encrypted with a different key derrived from the master key
AnyPeer.send(message, [awaitReply, [timeout]])
Sends a message to the peer
Arguments:
message
- a JSON stringifiable objectawaitReply
- set to true if a reply is expected (optional) - default: falsetimeout
- set a custom reply packet timeout in milliseconds (optional)
Returns a Promise that resolves with a AnyPacket if waiting for a reply or rejects on error
note: it doesn't resolve if awaitReply is not set
note: you can only reply to a normal message, you cannot reply to a reply packet. It fails silently
AnyPeer.disconnect(reason)
Disconnects the peer
Arguments:
reason
- a string that explains why the peer was disconnected
AnyPeer.isProxy()
Returns true
if the AnyPeer instance is a proxy (see: AnySocket.proxy)
AnyPeer.isE2EEnabled()
Returns true
if the connection has been end-to-end encrypted (see: AnyPeer.e2e)
message
AnyPeer event Emitted when a message is received
Arguments:
packet
- AnyPacket instance
e2e
AnyPeer event Emitted when the link has been end-to-end encrypted and it's ready to be used
Arguments:
peer
- AnyPeer instance
disconnected
AnyPeer event Emitted when the peer has disconnected
Arguments:
peer
- AnyPeer instancereason
- a string detailing the disconnect reason
AnyHTTPRouter()
Constructor should not be used directly
AnyHTTPRouter.on(method, path, callback)
Raw method to link to a HTTP query.
Example:
AnySocket.on("GET", "/index", (peer) => {
peer
.status(200)
.body("hello world")
.end();
});
Arguments:
method
- GET/POST/DELETE/Any Custom Method. Use "_" for any methodpath
- HTTP path, can be a string or RegExp instancecallback
- executed when the path matches a HTTP Path (arguments: AnyHTTPPeer)
AnyHTTPRouter.any(path, callback)
Matches a path with any method
Example:
AnySocket.any("/index", (peer) => {
peer
.status(200)
.body("hello world")
.end();
});
Arguments:
path
- HTTP path, can be a string or RegExp instancecallback
- executed when the path matches a HTTP Path (arguments: AnyHTTPPeer)
AnyHTTPRouter.get(path, callback)
Matches a path with GET method
Example:
AnySocket.get("/index", (peer) => {
peer
.status(200)
.body("hello world")
.end();
});
Arguments:
path
- HTTP path, can be a string or RegExp instancecallback
- executed when the path matches a HTTP Path (arguments: AnyHTTPPeer)
AnyHTTPRouter.post(path, callback)
Matches a path with POST method
Example:
AnySocket.post("/index", (peer) => {
peer
.status(200)
.body("hello world")
.end();
});
Arguments:
path
- HTTP path, can be a string or RegExp instancecallback
- executed when the path matches a HTTP Path (arguments: AnyHTTPPeer)
AnyHTTPRouter.delete(path, callback)
Matches a path with DELETE method
Example:
AnySocket.delete("/index", (peer) => {
peer
.status(200)
.body("hello world")
.end();
});
Arguments:
path
- HTTP path, can be a string or RegExp instancecallback
- executed when the path matches a HTTP Path (arguments: AnyHTTPPeer)
AnyHTTPRouter.error(callback)
Executes when a HTTP error is catched.
Arguments:
callback
- an error callback (arguments: AnyHTTPPeer, error)
AnyHTTPPeer()
Constructor should not be used directly
AnyHTTPPeer.url
Returns the HTTP Path without query string
AnyHTTPPeer.query
Returns an object like
{
headers: req.headers, // headers
cookies: req.headers.cookie, // cookies
method: req.method.toLowerCase(), // method lowercased
body: req.body, // post body
qs: qs.query // query string
}
AnyHTTPPeer.cookies
Returns the HTTP Cookies
AnyHTTPPeer.status(code)
Sets the return status code
Arguments:
code
- HTTP Status code (int)
Returns AnyHTTPPeer for chaining
AnyHTTPPeer.header(name, value)
Sets a header
Arguments:
name
- header name (string)value
- header value (string)
Returns AnyHTTPPeer for chaining
AnyHTTPPeer.body(chunk)
Appends a chunk(part) of the return body
Arguments:
chunk
- HTTP Body (string)
Returns AnyHTTPPeer for chaining
AnyHTTPPeer.setCookie(key, value, [expires])
Sets a cookie with key, value and expires.
Cookies are set on the same domain and path "/"
Arguments:
key
- cookie name (string)value
- cookie value (string)expires
- cookie expire time (UnixTimestamp in millis). If not set, expires = 1
Returns AnyHTTPPeer for chaining
AnyHTTPPeer.deleteCookie(key)
Sets a cookie with key and expires = 1
Arguments:
key
- cookie name (string)
Returns AnyHTTPPeer for chaining
AnyHTTPPeer.end()
Flush data and close the connection
AnyHTTPPeer.isClosed()
Check if the connection has already been ended / closed.
Upcoming Features
- Mesh Network
- Multiple transports: tcp, udp*, ipc
- Client reconnection
* this will require a change in the protocol, as the protocol assumes the packets are sent using a reliable, ordered connection
License
MIT