fix: handle YT new signature decode. Fixed #25

.gitignore

@@ -140,4 +140,5 @@ fabric.properties
 # End of https://www.gitignore.io/api/node,webstorm,visualstudiocode
 
 .DS_Store
-.parcel-cache
+.parcel-cache
+.vscode

package.json

@@ -1,6 +1,6 @@
 {
     "name": "youtube-stream-url",
-    "version": "2.4.1",
+    "version": "2.4.2",
     "description": "Get stream url from youtube link",
     "source": "src/index.js",
     "main": "dist/index.js",
@@ -28,5 +28,8 @@
     },
     "devDependencies": {
         "parcel": "^2.7.0"
+    },
+    "volta": {
+        "node": "18.18.0"
     }
-}
+}

src/index.js

@@ -56,9 +56,18 @@ const buildDecoder = async (watchHtml) => {
         return null;
     }
 
-    let varDeclaresMatches = jsFileContent.match(new RegExp(`(var ${varNameMatches[1]}={[\\s\\S]+}};)[a-zA-Z0-9]+\\.[a-zA-Z0-9]+\\.prototype`));
+    let varStartIndex = jsFileContent.indexOf(`var ${varNameMatches[1]}={`);
+    if (varStartIndex < 0) {
+        return null;
+    }
+    let varEndIndex = jsFileContent.indexOf('}};', varStartIndex);
+    if (varEndIndex < 0) {
+        return null
+    }
+
+    let varDeclares = jsFileContent.substring(varStartIndex, varEndIndex + 3);
 
-    if (!varDeclaresMatches) {
+    if (!varDeclares) {
         return null;
     }
 
@@ -67,7 +76,7 @@ const buildDecoder = async (watchHtml) => {
         let { s: signature, sp: signatureParam = 'signature', url } = Object.fromEntries(params);
         let decodedSignature = new Function(`
             "use strict";
-            ${varDeclaresMatches[1]}
+            ${varDeclares}
             return (${decodeFunction})("${signature}");
         `)();