From 173ca6cdf88e5dfa618a1afd9792da71b641e19a Mon Sep 17 00:00:00 2001
From: Aaron Liu <912394456@qq.com>
Date: Sun, 11 Jun 2023 09:44:43 +0800
Subject: [PATCH] fix(preview): use absolute URL for local storage policy

---
 service/explorer/file.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/service/explorer/file.go b/service/explorer/file.go
index 0fa1b8e..02710fe 100644
--- a/service/explorer/file.go
+++ b/service/explorer/file.go
@@ -227,6 +227,10 @@ func (service *FileIDService) CreateDocPreviewSession(ctx context.Context, c *gi
 		return serializer.Err(serializer.CodeNotSet, err.Error(), err)
 	}
 
+	if strings.HasPrefix(downloadURL, "/") {
+		downloadURL = path.Join(model.GetSiteURL().String(), downloadURL)
+	}
+
 	var resp serializer.DocPreviewSession
 
 	// Use WOPI preview if available