From d877282196bdf97f4edc63fd63b4f1a1445bc678 Mon Sep 17 00:00:00 2001
From: Mischa POSLAWSKY <perl@shiar.org>
Date: Wed, 16 Dec 2020 14:05:11 +0100
Subject: [PATCH] edit/page: enforce relative links to local domain

Replace <a href> and <img src> urls on save to fix common user mistake
breaking site deployment on a different [dev] domain.
---
 edit/page.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/edit/page.js b/edit/page.js
index f927c1f..45d9e64 100644
--- a/edit/page.js
+++ b/edit/page.js
@@ -28,6 +28,10 @@ CKEDITOR.plugins.add('inlinesave', {
 				});
 				// treat standalone placeholders as block elements
 				body = body.replace(/<p>(\[\[.*\]\])<\/p>/g, '$1');
+				// strip redundant domain in relative urls
+				var hostlink = 'https?://' + window.location.hostname.replace(/\W/g, '\\$&');
+				hostlink = new RegExp('(<a [^>]*href="|<img [^>]*src=")' + hostlink + '(?=/)', 'gi');
+				body = body.replace(hostlink, '$1');
 
 				var data = 'body='+encodeURIComponent(body);
 				var ajaxpost = new XMLHttpRequest();
-- 
2.30.0