From 7426cf752459f24afce78cb439e2aea440ec0583 Mon Sep 17 00:00:00 2001
From: Magnus Hagander <magnus@hagander.net>
Date: Wed, 20 Jun 2018 16:31:36 +0200
Subject: [PATCH] Make flat messageview redirect to md5 of messageid

Redirecting to the full messageid pollutes the URL pretty badly. md5 is
not the best of hashes, but the likelihood of getting an md5 collission
on the messageid *within a single thread* is extremely low -- and of
course if it happens the only effect is on the initial scroll of the
window.
---
 django/archives/mailarchives/templates/message_flat.html | 4 +++-
 django/archives/mailarchives/templatetags/pgfilters.py   | 6 ++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/django/archives/mailarchives/templates/message_flat.html b/django/archives/mailarchives/templates/message_flat.html
index c72496f..fd3c530 100644
--- a/django/archives/mailarchives/templates/message_flat.html
+++ b/django/archives/mailarchives/templates/message_flat.html
@@ -1,4 +1,5 @@
 {%extends "page.html"%}
+{%load pgfilters%}
 {%block title%}{%if not msg.hiddenstatus%}{{msg.subject}}{%endif%}{%endblock%}
 {%load pgfilters%}
 {%block extrahead%}
@@ -7,7 +8,7 @@
 <script type="text/javascript">
 function load() {
    if (document.location.href.indexOf('#') < 0) {
-      document.location.href = document.location.href + '#' + '{{msg.messageid}}';
+      document.location.href = document.location.href + '#' + '{{msg.messageid|md5}}';
    }
 }
 window.onload = load;
@@ -26,6 +27,7 @@ window.onload = load;
 {%endif%}
 {%for m in allmsg %}
 <a name="{{m.messageid}}"></a>
+<a name="{{m.messageid|md5}}"></a>
 {% include '_message.html' with msg=m show_all=True %}
 {% if not forloop.last %}
   <hr style="margin-bottom: 0.5rem;" />
diff --git a/django/archives/mailarchives/templatetags/pgfilters.py b/django/archives/mailarchives/templatetags/pgfilters.py
index 6dd68a9..4f85e80 100644
--- a/django/archives/mailarchives/templatetags/pgfilters.py
+++ b/django/archives/mailarchives/templatetags/pgfilters.py
@@ -3,6 +3,7 @@ from django import template
 from email.utils import parseaddr
 
 import re
+import hashlib
 
 register = template.Library()
 
@@ -43,3 +44,8 @@ def nameonly(value):
 	if name:
 		return name
 	return email.split('@')[0]
+
+@register.filter(name='md5')
+@stringfilter
+def md5(value):
+	return hashlib.md5(value).hexdigest()
-- 
2.39.5