calcurse-caldav: Support custom HTTP headers

Add support for specifying additional HTTP headers, such as the
User-Agent, in the configuration file.

Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>

contrib/caldav/calcurse-caldav.py

@@ -83,7 +83,8 @@ def get_auth_headers():
     return headers
 
 def remote_query(cmd, path, additional_headers, body):
-    headers = get_auth_headers()
+    headers = custom_headers.copy()
+    headers.update(get_auth_headers())
     if cmd == 'PUT':
         headers['Content-Type'] = 'text/calendar; charset=utf-8'
     else:
@@ -380,6 +381,11 @@ if config.has_option('Auth', 'Password'):
 else:
     password = None
 
+if config.has_section('CustomHeaders'):
+    custom_headers = dict(config.items('CustomHeaders'))
+else:
+    custom_headers = {}
+
 # Show disclaimer when performing a dry run.
 if dry_run:
     print('Dry run. Nothing is actually imported/exported.')

contrib/caldav/config.sample

@@ -29,3 +29,7 @@ Verbose = Yes
 #[Auth]
 #Username = user
 #Password = pass
+
+# Optionally specify additional HTTP headers here.
+#[CustomHeaders]
+#User-Agent = Mac_OS_X/10.9.2 (13C64) CalendarAgent/176