* Add Subject header to statistics

* Write log message about symbols that are removed when composite symbol is inserted

src/controller.c

@@ -845,7 +845,9 @@ controller_read_socket (f_str_t * in, void *arg)
 			session->state = STATE_REPLY;
 			return TRUE;
 		}
-	
+
+		/* Take care of subject */
+		tokenize_subject (task, &tokens);
 
 		/* Init classifier */
 		cls_ctx = session->learn_classifier->classifier->init_func (session->session_pool, session->learn_classifier);

src/filter.c

@@ -319,6 +319,8 @@ composites_foreach_callback (gpointer key, gpointer value, void *data)
 	GQueue                         *stack;
 	GList                          *symbols = NULL, *s;
 	gsize                           cur, op1, op2;
+	gchar                           logbuf[256];
+	gint                            r;
 
 	stack = g_queue_new ();
 
@@ -367,8 +369,15 @@ composites_foreach_callback (gpointer key, gpointer value, void *data)
 		if (op1) {
 			/* Remove all symbols that are in composite symbol */
 			s = g_list_first (symbols);
+			r = rspamd_snprintf (logbuf, sizeof (logbuf), "<%s>, insert symbol %s instead of symbols: ", cd->task->message_id, key);
 			while (s) {
 				g_hash_table_remove (cd->metric_res->symbols, s->data);
+				if (s->next) {
+					r += rspamd_snprintf (logbuf + r, sizeof (logbuf) -r, "%s, ", s->data);
+				}
+				else {
+					r += rspamd_snprintf (logbuf + r, sizeof (logbuf) -r, "%s", s->data);
+				}
 				s = g_list_next (s);
 			}
 			/* Add new symbol */
@@ -432,6 +441,8 @@ process_autolearn (struct statfile *st, struct worker_task *task, GTree * tokens
 
 	if (check_autolearn (st->autolearn, task)) {
 		if (tokens) {
+			/* Take care of subject */
+			tokenize_subject (task, &tokens);
 			msg_info ("message with id <%s> autolearned statfile '%s'", task->message_id, filename);
 			
 			/* Get or create statfile */
@@ -527,6 +538,8 @@ classifiers_callback (gpointer value, void *arg)
 		return;
 	}
 
+	/* Take care of subject */
+	tokenize_subject (task, &tokens);
 	cl->classifier->classify_func (ctx, task->worker->srv->statfile_pool, tokens, task);
 
 	/* Autolearning */

src/tokenizers/tokenizers.c

@@ -222,6 +222,44 @@ tokenize_headers (memory_pool_t * pool, struct worker_task *task, GTree ** tree)
 	return TRUE;
 }
 
+void
+tokenize_subject (struct worker_task *task, GTree ** tree)
+{
+	f_str_t                         subject, subject_name;
+	const gchar                    *sub;
+	token_node_t                   *new = NULL;
+
+	if (*tree == NULL) {
+		*tree = g_tree_new (token_node_compare_func);
+		memory_pool_add_destructor (task->task_pool, (pool_destruct_func) g_tree_destroy, *tree);
+	}
+
+	subject_name.begin = "Subject:";
+	subject_name.len = sizeof ("Subject:") - 1;
+
+	/* Try to use pre-defined subject */
+	if (task->subject != NULL) {
+		new = memory_pool_alloc (task->task_pool, sizeof (token_node_t));
+		subject.begin = task->subject;
+		subject.len = strlen (task->subject);
+		new->h1 = fstrhash (&subject_name) * primes[0];
+		new->h2 = fstrhash (&subject) * primes[1];
+		if (g_tree_lookup (*tree, new) == NULL) {
+			g_tree_insert (*tree, new, new);
+		}
+	}
+	if ((sub = g_mime_message_get_subject (task->message)) != NULL) {
+		new = memory_pool_alloc (task->task_pool, sizeof (token_node_t));
+		subject.begin = (gchar *)sub;
+		subject.len = strlen (sub);
+		new->h1 = fstrhash (&subject_name) * primes[0];
+		new->h2 = fstrhash (&subject) * primes[1];
+		if (g_tree_lookup (*tree, new) == NULL) {
+			g_tree_insert (*tree, new, new);
+		}
+	}
+}
+
 /*
  * vi:ts=4
  */

src/tokenizers/tokenizers.h

@@ -40,6 +40,8 @@ int osb_tokenize_text (struct tokenizer *tokenizer, memory_pool_t *pool, f_str_t
 int tokenize_urls (memory_pool_t *pool, struct worker_task *task, GTree **cur);
 /* Common tokenizer for headers */
 int tokenize_headers (memory_pool_t *pool, struct worker_task *task, GTree **cur);
+/* Make tokens for a subject */
+void tokenize_subject (struct worker_task *task, GTree ** tree);
 
 /* Array of all defined tokenizers */
 extern struct tokenizer tokenizers[];