From f5d2b397fd174f7f3a1a9373056488a8b7dab49e Mon Sep 17 00:00:00 2001
From: Andrew McMillan <andrew@morphoss.com>
Date: Fri, 24 Feb 2012 11:17:54 +1300
Subject: [PATCH] Only send a Content-Length if the length is > 0

---
 inc/CalDAVRequest.php | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/inc/CalDAVRequest.php b/inc/CalDAVRequest.php
index 01711e09..a0af5c90 100644
--- a/inc/CalDAVRequest.php
+++ b/inc/CalDAVRequest.php
@@ -1199,8 +1199,10 @@ EOSQL;
       }
     }
 
-    header( "Content-Length: ".strlen($message) );
-    echo $message;
+    if ( $message != '' ) {
+      @header( "Content-Length: ".strlen($message) );
+      echo $message;
+    }
 
     if ( isset($c->dbg['caldav']) && $c->dbg['caldav'] ) {
       if ( strlen($message) > 100 || strstr($message, "\n") ) {