From df1c80fbbfc04e53132088f3fe91fb204f736663 Mon Sep 17 00:00:00 2001
From: Edward Betts <edward@4angle.com>
Date: Tue, 4 Dec 2018 15:17:47 +0000
Subject: [PATCH] Item.from_external() to support BASE_URL.

---
 sourcing/model.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sourcing/model.py b/sourcing/model.py
index edf1aba..6d2700d 100644
--- a/sourcing/model.py
+++ b/sourcing/model.py
@@ -236,10 +236,13 @@ span: {},start=0,length={}'''.format(self.external_url, title_source_doc.externa
 
     @classmethod
     def from_external(cls, url, home=None):
+        base = current_app.config.get('BASE_URL')
         if home is None:
             home = url_for('view.home', _external=True)
         if url.startswith(home):
             username, _, hashid = url[len(home):].partition('/')
+        elif base and url.startswith(base):
+            username, _, hashid = url[len(base):].lstrip('/').partition('/')
         else:
             m = re_server_url.match(url)
             if not m: