1 files changed, 62 insertions, 0 deletions
diff --git a/src/events/Connection.ts b/src/events/Connection.ts
new file mode 100644
index 00000000..1ef9fb48
--- /dev/null
+++ b/src/events/Connection.ts
@@ -0,0 +1,62 @@
+import WebSocket, { Server } from "../util/WebSocket";
+import { IncomingMessage } from "http";
+import { Close } from "./Close";
+import { Message } from "./Message";
+import { setHeartbeat } from "../util/setHeartbeat";
+import { Send } from "../util/Send";
+import { CLOSECODES, OPCODES } from "../util/Constants";
+import { createDeflate } from "zlib";
+var erlpack: any;
+try {
+ erlpack = require("erlpack");
+} catch (error) {}
+
+// TODO: check rate limit
+// TODO: specify rate limit in config
+// TODO: check msg max size
+
+export async function Connection(this: Server, socket: WebSocket, request: IncomingMessage) {
+ try {
+ socket.on("close", Close);
+ socket.on("message", Message);
+
+ const { searchParams } = new URL(`http://localhost${request.url}`);
+ // @ts-ignore
+ socket.encoding = searchParams.get("encoding") || "json";
+ if (!["json", "etf"].includes(socket.encoding)) {
+ if (socket.encoding === "etf" && erlpack) throw new Error("Erlpack is not installed: 'npm i -D erlpack'");
+ return socket.close(CLOSECODES.Decode_error);
+ }
+
+ // @ts-ignore
+ socket.version = Number(searchParams.get("version")) || 8;
+ if (socket.version != 8) return socket.close(CLOSECODES.Invalid_API_version);
+
+ // @ts-ignore
+ socket.compress = searchParams.get("compress") || "";
+ if (socket.compress) {
+ if (socket.compress !== "zlib-stream") return socket.close(CLOSECODES.Decode_error);
+ socket.deflate = createDeflate({ chunkSize: 65535 });
+ socket.deflate.on("data", (chunk) => socket.send(chunk));
+ }
+
+ socket.permissions = {};
+ socket.sequence = 0;
+
+ setHeartbeat(socket);
+
+ await Send(socket, {
+ op: OPCODES.Hello,
+ d: {
+ heartbeat_interval: 1000 * 30,
+ },
+ });
+
+ socket.readyTimeout = setTimeout(() => {
+ return socket.close(CLOSECODES.Session_timed_out);
+ }, 1000 * 30);
+ } catch (error) {
+ console.error(error);
+ return socket.close(CLOSECODES.Unknown_error);
+ }
+}
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