From 502e5b0ec87d988a64296ee4a0c2cdca63e58031 Mon Sep 17 00:00:00 2001
From: Manish Jethani <code@manishjethani.io>
Date: Mon, 2 Aug 2021 22:02:47 +0530
Subject: [PATCH] Use fs API to load serialized PSL (#3797)

---
 platform/nodejs/index.js | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/platform/nodejs/index.js b/platform/nodejs/index.js
index 50f25427c..d423bea69 100644
--- a/platform/nodejs/index.js
+++ b/platform/nodejs/index.js
@@ -25,6 +25,12 @@
 
 import { createRequire } from 'module';
 
+import { readFileSync } from 'fs';
+import { dirname, resolve } from 'path';
+import { fileURLToPath } from 'url';
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+
 import './lib/punycode.js';
 import './lib/publicsuffixlist/publicsuffixlist.js';
 
@@ -41,6 +47,10 @@ import {
 
 /******************************************************************************/
 
+function loadJSON(path) {
+    return JSON.parse(readFileSync(resolve(__dirname, path), 'utf8'));
+}
+
 function compileList(rawText, writer, options = {}) {
     const lineIter = new LineIterator(rawText);
     const parser = new StaticFilteringParser(true);
@@ -106,8 +116,13 @@ function pslInit(raw) {
 
         // Use serialized version if available
         try {
-            serialized = require('./build/publicsuffixlist.json');
+            // Use loadJSON() because require() would keep the string in memory.
+            serialized = loadJSON('build/publicsuffixlist.json');
         } catch (error) {
+            if (process.env.npm_lifecycle_event !== 'install') {
+                // This should never happen except during package installation.
+                console.error(error);
+            }
         }
 
         if (serialized !== null) {