SvelteWebSocketServer 2.0.0-alpha

SvelteWebSocketServer

Basic C# implementation of a WebSocket server for use with svelte-websocket-stores

Usage

Basic Initialization

using SvelteWebSocketServer;

var wss = new WebSocketServer();
var wsw = wss.webSocketWrapper; // Main entry-point

wss.Start(); // Non-blocking

Initialization using the WebSocketWrapperListener for easy event handling

using SvelteWebSocketServer;

var wss = new WebSocketServer();
var wsw = wss.webSocketWrapper; // Main entry-point
var wswListener = new WebSocketWrapperListener(wsw);

wss.Start(); // Non-blocking

Basic event handling

wsw.OnNumberSet += (id, value) => ...

Event handling using WebSocketWrapperListener

wswListener.AddBooleanHandler("tp1.some.state", (id, value) => ... );
wswListener.AddBooleanRegexHandler(new Regex("(.+?)\\.some\\.state"), (match, value) => ... );

WebSocket Message Format

All communication between a client and this library is over WebSocket.

All WebSocket messages are interpreted as JSON objects.

The message object is defined as:

type Message = {
	id: string,
	type: string,
	value: boolean | number | string,
}

The field type determines how the value field is interpreted as well as which of the tables (booleans, numbers, or strings) the id field will be indexing into.

Server

Client Connected

1. Send the client messages for all the variables currently stored values

Message Received

1. The incoming text data is parsed as JSON.
2. The object's type field is switched on with the cases "boolean", "number", and "string". If there is no match, the message is discarded.
3. Using the values from the id and value fields, set the value of the respective variable to the new value.
4. Send all clients a message for the new value.
5. Handle any events.

Client [^1]

Message Received

1. The incoming text data is parsed as JSON.
2. The object's id field is checked if it starts with the client's local ID prefix (for example "id1.") or the global ID prefix ("global.").
3. If it does, the id field is rewritten without that prefix and continues. Otherwise, the message is discarded.
4. The object's type field is switched on with the cases "boolean", "number", and "string". If there is no match, the message is discarded.
5. The value field is cast to its respective type.

[^1]: This is the behavior expected by this WebSocket client