From aa5c338086f575ed62f799ea2ad726c2a6481ee4 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Thu, 12 Feb 2026 09:22:26 +0000
Subject: [PATCH] Improve absolute path detection for cross-platform
 compatibility

Co-authored-by: Tyrrrz <1935960+Tyrrrz@users.noreply.github.com>
---
 DiscordChatExporter.Core/Utils/Url.cs | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/DiscordChatExporter.Core/Utils/Url.cs b/DiscordChatExporter.Core/Utils/Url.cs
index 1250c604..21f3017d 100644
--- a/DiscordChatExporter.Core/Utils/Url.cs
+++ b/DiscordChatExporter.Core/Utils/Url.cs
@@ -11,8 +11,13 @@ public static class Url
         var buffer = new StringBuilder();
         var position = 0;
 
-        // Check if the path is absolute
-        var isAbsolute = Path.IsPathRooted(filePath);
+        // Check if the path is absolute (either Unix-style or Windows-style)
+        // Unix: starts with /
+        // Windows: starts with drive letter followed by colon (e.g., C:)
+        var isUnixAbsolute = filePath.StartsWith('/') || filePath.StartsWith('\\');
+        var isWindowsAbsolute =
+            filePath.Length >= 2 && char.IsLetter(filePath[0]) && filePath[1] == ':';
+        var isAbsolute = isUnixAbsolute || isWindowsAbsolute;
 
         // For absolute paths, prepend file:// protocol for proper browser handling
         if (isAbsolute)
@@ -21,7 +26,7 @@ public static class Url
 
             // On Windows, we need to add an extra slash before the drive letter
             // e.g., file:///C:/path instead of file://C:/path
-            if (!filePath.StartsWith('/') && !filePath.StartsWith('\\'))
+            if (isWindowsAbsolute)
             {
                 buffer.Append('/');
             }