Bug 50267 - mod_mbox: % in message id, needs escaping as %25
Summary: mod_mbox: % in message id, needs escaping as %25
Alias: None
Product: Apache httpd-2
Classification: Unclassified
Component: mod_mbox (show other bugs)
Version: 2.5-HEAD
Hardware: PC Linux
: P2 normal (vote)
Target Milestone: ---
Assignee: Apache HTTPD Bugs Mailing List
Depends on:
Reported: 2010-11-13 15:34 UTC by jeremy carroll
Modified: 2013-05-21 19:51 UTC (History)
3 users (show)


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Description jeremy carroll 2010-11-13 15:34:53 UTC
I was trying to understand why in this archive

messages from Mattmann, Chris A (388J) do not load, such as the second.

Using firefox, if I open link in new tab, I get:

which has the obvious perecent escape problem of not having escaped the 
% in the message id.

Fix this and


returns appropriate XML content


The headers say:
Server: Apache/2.3.8 (Unix) mod_ssl/2.3.8 OpenSSL/1.0.0a
Comment 1 jeremy carroll 2010-11-13 15:48:24 UTC
It seems more complicated:

examine the source for 

at the end is:

<li>Unnamed multipart/alternative (inline, None, 0 bytes)</li>
<li><a rel="nofollow" href="/mod_mbox/incubator-general/201011.mbox/raw/<C8F432CA.238DB%Chris.A.Mattmann@jpl.nasa.gov>/1">Unnamed text/plain</a> (inline, Quoted Printable, 5490 bytes)</li>

   <tr class="raw">
    <td class="left"></td>
    <td class="right"><a href="/mod_mbox/incubator-general/201011.mbox/raw/%3cC8F432CA.238DB%25Chris.A.Mattmann@jpl.nasa.gov%3e" rel="nofollow">View raw message</a></td>

Notice the first link is bad (and 400s), the second is good (and 200s).
So the subtleties in %-escaping % seem to have defeated the programmer here.
Comment 2 Stefan Fritsch 2011-10-21 22:45:29 UTC
This should be fixed in r1187588, but I am waiting with closing the bug until that is installed on mail-archives.apache.org
Comment 3 Stefan Fritsch 2011-10-26 19:49:26 UTC
This is fixed now on mail-archives.apache.org
Comment 4 Stefan Fritsch 2011-10-26 19:52:03 UTC
*** Bug 52039 has been marked as a duplicate of this bug. ***
Comment 5 Sebb 2011-11-02 13:17:50 UTC
The Chris Mattmann mails no longer open in Firefox or Chrome in browse mode.

Has the fix been lost?
Comment 6 Sebb 2011-11-10 14:26:12 UTC
Still fails in Chrome 15.0.874.106 m

But has started working in Firefox 8.0.
This appears to be because that fixes the bad characters in the URL.

So it looks like the fix is still lost.
Comment 8 Stefan Fritsch 2012-04-14 10:24:23 UTC
Fixed with the merge of the convert-charset branch, r1326076
Now live on mail-archives.apache.org
Comment 9 Daniel Shahaf 2013-05-21 01:18:48 UTC
On mail-archives.apache.org, we now see a message that requires double-escaping:


At a guess, that is because the original message-id contains a percent sign followed by two hex digits.  (In the original example, the first two letters of "Chris" are not both hex digits.)

See: https://issues.apache.org/jira/browse/INFRA-6244
Comment 10 Rainer Jung 2013-05-21 19:51:55 UTC
Remaining case fixed with r1484915.

The msgId was percent decoded twice in the module, so that a percent sign in the msgID resulted in trouble.

Since the msgID was derived from path_info which was already percent decoded, there was no reason to percent decode the msgID itself again.

All links including a msgID should have already been single encoded before this commit so work well with single decoding.

Code is running on US instance of mail-archives.apache.org. Will update the EU instance during the next few hours as well.