Allow restriction of methods for paths.

Now Kore will automatically send a 400 bad request in case the
method was not allowed on the path.

conf/kore.conf.example

@@ -267,6 +267,10 @@ domain localhost {
 	static		/params-test		serve_params_test
 	static		/private		serve_private
 
+	# Restrict some URIs to certain methods
+	restrict /private post
+	restrict /validator post get head
+
 	# Page handlers with authentication.
 	static		/private/test	serve_private_test	auth_example
 

include/kore/http.h

@@ -188,13 +188,17 @@ struct http_file {
 	TAILQ_ENTRY(http_file)	list;
 };
 
-#define HTTP_METHOD_GET		0
-#define HTTP_METHOD_POST	1
-#define HTTP_METHOD_PUT		2
-#define HTTP_METHOD_DELETE	3
-#define HTTP_METHOD_HEAD	4
-#define HTTP_METHOD_OPTIONS	5
-#define HTTP_METHOD_PATCH	6
+#define HTTP_METHOD_GET		0x0001
+#define HTTP_METHOD_POST	0x0002
+#define HTTP_METHOD_PUT		0x0004
+#define HTTP_METHOD_DELETE	0x0010
+#define HTTP_METHOD_HEAD	0x0020
+#define HTTP_METHOD_OPTIONS	0x0040
+#define HTTP_METHOD_PATCH	0x0080
+
+#define HTTP_METHOD_ALL		(HTTP_METHOD_GET | HTTP_METHOD_POST | \
+    HTTP_METHOD_PUT | HTTP_METHOD_DELETE | HTTP_METHOD_HEAD | \
+    HTTP_METHOD_OPTIONS | HTTP_METHOD_PATCH)
 
 #define HTTP_REQUEST_COMPLETE		0x0001
 #define HTTP_REQUEST_DELETE		0x0002

include/kore/kore.h

@@ -351,6 +351,7 @@ struct kore_module_handle {
 	struct kore_runtime_call	*rcall;
 #if !defined(KORE_NO_HTTP)
 	struct kore_auth			*auth;
+	int					methods;
 	TAILQ_HEAD(, kore_handler_params)	params;
 #endif
 	TAILQ_ENTRY(kore_module_handle)		list;

src/config.c

@@ -78,6 +78,7 @@ static int		configure_client_verify_depth(char *);
 
 #if !defined(KORE_NO_HTTP)
 static int		configure_filemap(char *);
+static int		configure_restrict(char *);
 static int		configure_handler(int, char *);
 static int		configure_static_handler(char *);
 static int		configure_dynamic_handler(char *);
@@ -160,6 +161,7 @@ static struct {
 	{ "static",			configure_static_handler },
 	{ "dynamic",			configure_dynamic_handler },
 	{ "accesslog",			configure_accesslog },
+	{ "restrict",			configure_restrict },
 	{ "http_media_type",		configure_http_media_type },
 	{ "http_header_max",		configure_http_header_max },
 	{ "http_body_max",		configure_http_body_max },
@@ -714,6 +716,60 @@ configure_accesslog(char *path)
 	return (KORE_RESULT_OK);
 }
 
+static int
+configure_restrict(char *options)
+{
+	struct kore_module_handle	*hdlr;
+	int				i, cnt;
+	char				*argv[10];
+
+	if (current_domain == NULL) {
+		printf("restrict not used in domain context\n");
+		return (KORE_RESULT_ERROR);
+	}
+
+	cnt = kore_split_string(options, " ", argv, 10);
+	if (cnt < 2) {
+		printf("bad restrict option '%s', missing methods\n", options);
+		return (KORE_RESULT_ERROR);
+	}
+
+	hdlr = NULL;
+	TAILQ_FOREACH(hdlr, &(current_domain->handlers), list) {
+		if (!strcmp(hdlr->path, argv[0]))
+			break;
+	}
+
+	if (hdlr == NULL) {
+		printf("bad restrict option handler '%s' not found", argv[0]);
+		return (KORE_RESULT_ERROR);
+	}
+
+	hdlr->methods = 0;
+
+	for (i = 1; i < cnt; i++) {
+		if (!strcasecmp(argv[i], "post")) {
+			hdlr->methods |= HTTP_METHOD_POST;
+		} else if (!strcasecmp(argv[i], "get")) {
+			hdlr->methods |= HTTP_METHOD_GET;
+		} else if (!strcasecmp(argv[i], "put")) {
+			hdlr->methods |= HTTP_METHOD_PUT;
+		} else if (!strcasecmp(argv[i], "delete")) {
+			hdlr->methods |= HTTP_METHOD_DELETE;
+		} else if (!strcasecmp(argv[i], "head")) {
+			hdlr->methods |= HTTP_METHOD_HEAD;
+		} else if (!strcasecmp(argv[i], "patch")) {
+			hdlr->methods |= HTTP_METHOD_PATCH;
+		} else {
+			printf("unknown method: %s in restrict for %s\n",
+			    argv[i], argv[0]);
+			return (KORE_RESULT_ERROR);
+		}
+	}
+
+	return (KORE_RESULT_OK);
+}
+
 static int
 configure_filemap_ext(char *ext)
 {

src/http.c

@@ -1372,6 +1372,11 @@ http_request_new(struct connection *c, const char *host,
 		return (NULL);
 	}
 
+	if (!(hdlr->methods & m)) {
+		http_error_response(c, 400);
+		return (NULL);
+	}
+
 	req = kore_pool_get(&http_request_pool);
 	req->end = 0;
 	req->total = 0;

src/module.c

@@ -235,6 +235,7 @@ kore_module_handler_new(const char *path, const char *domain,
 	hdlr->type = type;
 	hdlr->path = kore_strdup(path);
 	hdlr->func = kore_strdup(func);
+	hdlr->methods = HTTP_METHOD_ALL;
 
 	TAILQ_INIT(&(hdlr->params));