json: add API

src/modules/json/api.h

@@ -0,0 +1,57 @@
+/**
+ *
+ * Copyright (C) 2010 Daniel-Constantin Mierla (asipto.com)
+ *
+ * This file is part of kamailio, a free SIP server.
+ *
+ * kamailio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version
+ *
+ * kamailio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef _JSON_API_H_
+#define _JSON_API_H_
+
+#include "../../core/sr_module.h"
+
+typedef struct json_object *(*json_parse_f) (const char *str);
+typedef str (*json_extract_field_f)(
+		struct json_object *json_obj, char *json_name);
+
+typedef struct json_api {
+	json_parse_f json_parse;
+	json_extract_field_f extract_field;
+} json_api_t;
+
+typedef int (*bind_json_f) (json_api_t *api);
+int bind_json(json_api_t *api);
+
+/**
+ * @brief Load the JSON API
+ */
+static inline int json_load_api(json_api_t *api) {
+	bind_json_f bindjson;
+
+	bindjson = (bind_json_f)find_export("bind_json", 0, 0);
+	if (bindjson == 0) {
+		LM_ERR("cannot find bind_json\n");
+		return -1;
+	}
+	if (bindjson(api) < 0) {
+		LM_ERR("cannot bind json api\n");
+		return -1;
+	}
+	return 0;
+}
+
+#endif

src/modules/json/json_mod.c

@@ -27,6 +27,7 @@
 #include "../../core/mod_fix.h"
 #include "../../core/sr_module.h"
 
+#include "api.h"
 #include "json_funcs.h"
 #include "json_trans.h"
 
@@ -41,11 +42,11 @@ char tr_json_escape_char = '%';
 static tr_export_t mod_trans[] = {
 		{{"json", sizeof("json") - 1}, json_tr_parse}, {{0, 0}, 0}};
 
-static cmd_export_t cmds[]={
-	{"json_get_field", (cmd_function)json_get_field, 3,
-		fixup_get_field, fixup_get_field_free, ANY_ROUTE},
-	{0, 0, 0, 0, 0, 0}
-};
+static cmd_export_t cmds[] = {
+		{"json_get_field", (cmd_function)json_get_field, 3, fixup_get_field,
+				fixup_get_field_free, ANY_ROUTE},
+		{"bind_json", (cmd_function)bind_json, 0, 0, 0, ANY_ROUTE},
+		{0, 0, 0, 0, 0, 0}};
 
 static param_export_t params[] = {
 		{"json_escape_char", PARAM_STR, &tr_json_escape_str}, {0, 0, 0}};
@@ -64,6 +65,26 @@ struct module_exports exports = {
 		0						 /* per-child init function */
 };
 
+str _json_extract_field(struct json_object *json_obj, char *json_name)
+{
+	str val;
+	json_extract_field(json_name, val);
+	return val;
+}
+
+/**
+ *
+ */
+int bind_json(json_api_t *api) {
+	if (!api) {
+		ERR("Invalid parameter value\n");
+		return -1;
+	}
+	api->json_parse = json_parse;
+	api->extract_field = _json_extract_field;
+	return 0;
+}
+
 int mod_register(char *path, int *dlflags, void *p1, void *p2)
 {
 	if(json_tr_init_buffers() < 0) {