[evolution] Add debugging for formatter requests

[Milan Crha <mcrha src gnome org>]

commit 6d96953703d24d146cdec1c25a97c07cd29c2c24
Author: Milan Crha <mcrha redhat com>
Date:   Wed Sep 25 09:19:47 2013 +0200

    Add debugging for formatter requests
    
    With CAMEL_DEBUG=emformat:requests the evolution prints a debug messages
    about requests being processed when formatting messages.

 mail/e-http-request.c |    5 +++++
 mail/e-mail-request.c |   21 ++++++++++++++++++---
 2 files changed, 23 insertions(+), 3 deletions(-)
---
diff --git a/mail/e-http-request.c b/mail/e-http-request.c
index a4a3556..996a993 100644
--- a/mail/e-http-request.c
+++ b/mail/e-http-request.c
@@ -188,6 +188,11 @@ handle_http_request (GSimpleAsyncResult *res,
 
        evo_uri = soup_uri_to_string (soup_uri, FALSE);
 
+       if (camel_debug_start ("emformat:requests")) {
+               printf ("%s: looking for '%s'\n", G_STRFUNC, evo_uri);
+               camel_debug_end ();
+       }
+
        /* Remove the "evo-" prefix from scheme */
        uri_len = strlen (evo_uri);
        uri = NULL;
diff --git a/mail/e-mail-request.c b/mail/e-mail-request.c
index e6338ee..bfbedc3 100644
--- a/mail/e-mail-request.c
+++ b/mail/e-mail-request.c
@@ -82,7 +82,14 @@ handle_mail_request (GSimpleAsyncResult *simple,
 
        registry = e_mail_part_list_get_registry ();
        part_list = camel_object_bag_get (registry, request->priv->uri_base);
-       g_return_if_fail (part_list != NULL);
+
+       if (camel_debug_start ("emformat:requests")) {
+               printf ("%s: found part-list %p for full_uri '%s'\n", G_STRFUNC, part_list, 
request->priv->full_uri);
+               camel_debug_end ();
+       }
+
+       if (!part_list)
+               return;
 
        val = g_hash_table_lookup (
                request->priv->uri_query, "headers_collapsed");
@@ -131,10 +138,17 @@ handle_mail_request (GSimpleAsyncResult *simple,
 
                part_id = soup_uri_decode (val);
                part = e_mail_part_list_ref_part (part_list, part_id);
+               if (!part) {
+                       if (camel_debug_start ("emformat:requests")) {
+                               printf ("%s: part with id '%s' not found\n", G_STRFUNC, part_id);
+                               camel_debug_end ();
+                       }
+
+                       g_free (part_id);
+                       goto no_part;
+               }
                g_free (part_id);
 
-               g_return_if_fail (part != NULL);
-
                mime_type = g_hash_table_lookup (
                        request->priv->uri_query, "mime_type");
 
@@ -171,6 +185,7 @@ handle_mail_request (GSimpleAsyncResult *simple,
                        context.flags, context.mode, cancellable);
        }
 
+ no_part:
        g_clear_object (&output_stream);
        g_clear_object (&context.part_list);