From 943af3cd6f1cedfe14b4f60668be32d89b78c52b Mon Sep 17 00:00:00 2001
From: Alf Eaton <alf.eaton@overleaf.com>
Date: Thu, 9 Oct 2025 13:23:28 +0100
Subject: [PATCH] Use path.resolve for resolving paths (#28905)

GitOrigin-RevId: 8f549b410ebf35e330a472fd4de1e3343747794e
---
 package-lock.json                                     |  1 +
 .../frontend/js/infrastructure/project-snapshot.ts    | 11 ++++++-----
 services/web/package.json                             |  1 +
 3 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/package-lock.json b/package-lock.json
index b06ada26c6..3a1b180695 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -52822,6 +52822,7 @@
         "nock": "^13.5.6",
         "nvd3": "^1.8.6",
         "p-reflect": "^3.1.0",
+        "path-browserify": "^1.0.1",
         "pdfjs-dist": "5.1.91",
         "pirates": "^4.0.1",
         "postcss": "^8.4.31",
diff --git a/services/web/frontend/js/infrastructure/project-snapshot.ts b/services/web/frontend/js/infrastructure/project-snapshot.ts
index 6cd0b20982..0b564cc12b 100644
--- a/services/web/frontend/js/infrastructure/project-snapshot.ts
+++ b/services/web/frontend/js/infrastructure/project-snapshot.ts
@@ -2,6 +2,7 @@ import pLimit from 'p-limit'
 import { Change, Chunk, Snapshot, File } from 'overleaf-editor-core'
 import { RawChange, RawChunk } from 'overleaf-editor-core/lib/types'
 import { FetchError, getJSON, postJSON } from '@/infrastructure/fetch-json'
+import path from 'path-browserify'
 
 const DOWNLOAD_BLOBS_CONCURRENCY = 10
 
@@ -101,21 +102,21 @@ export class ProjectSnapshot {
 
     const snapshotPaths = new Set(this.snapshot.getFilePathnames())
 
-    const baseURLs = [
+    const basePaths = [
       // relative to the root of the compile directory
-      new URL('https://overleaf.invalid'),
+      '/',
     ]
 
     if (currentPath !== '/') {
       // relative to the current directory
-      baseURLs.push(new URL(currentPath, 'https://overleaf.invalid'))
+      basePaths.push(currentPath)
     }
 
     const extensionsToTest = ['', ...extensions]
 
-    for (const baseURL of baseURLs) {
+    for (const basePath of basePaths) {
       for (const extension of extensionsToTest) {
-        const { pathname } = new URL(`${filePath}${extension}`, baseURL)
+        const pathname = path.resolve(basePath, `${filePath}${extension}`)
         const snapshotPath = pathname.substring(1) // remove leading slash
         if (snapshotPaths.has(snapshotPath)) {
           return snapshotPath
diff --git a/services/web/package.json b/services/web/package.json
index efaaa1fe3d..e64ed6204e 100644
--- a/services/web/package.json
+++ b/services/web/package.json
@@ -351,6 +351,7 @@
     "mock-fs": "^5.1.2",
     "nock": "^13.5.6",
     "nvd3": "^1.8.6",
+    "path-browserify": "^1.0.1",
     "p-reflect": "^3.1.0",
     "pdfjs-dist": "5.1.91",
     "pirates": "^4.0.1",