allow for a configurable websocket proxy

Author: ading2210

.gitignore

@@ -7,10 +7,6 @@ CMakeFiles/
 stk-editor/
 .vscode/
 tags.*
-wasm/build/
-wasm/prefix/
-wasm/emsdk/
-wasm/web/game
 
 # clangd
 .cache/

wasm/.gitignore

@@ -0,0 +1,5 @@
+/build/
+/prefix/
+/emsdk/
+/web/game
+/web/config.json

wasm/fragments/patch_ws.js

@@ -0,0 +1,10 @@
+/* REPLACE
+ws ?= ?new WebSocketConstructor\(url, ?opts\)
+*/
+if (globalThis.config.ws_enabled) {
+  ws = new WebSocket(url);
+}
+else {
+  console.error("websocket creation denied - disabled by config");
+  throw new TypeError("ws disabled");
+}

wasm/web/config_example.json

@@ -0,0 +1,4 @@
+{
+  "ws_enabled": false,
+  "ws_proxy": "wss://example.com/"
+}

wasm/web/script.js

@@ -13,6 +13,7 @@ let info_container = document.getElementById("info_container");
 let quality_select = document.getElementById("quality_select");
 
 let syncing_fs = false;
+let config = {};
 
 function load_db() {
   if (db) return db;
@@ -213,10 +214,20 @@ function set_websocket_url(url) {
   Module.websocket.url = url;
 }
 
+async function load_config() {
+  let response = await fetch("/config.json");
+  config = await response.json();
+  globalThis.config = config;
+}
+
 async function main() {
-  set_websocket_url("wss://anura.pro/");
   globalThis.ready = true;
+  await load_config();
   await load_idbfs();
+  if (config.ws_enabled) {
+    set_websocket_url(config.ws_proxy);
+  }
+
   start_button.onclick = start_game;
   start_button.disabled = false;
   status_text.innerText = "";