add deferred reply to the ubus server example

diff --git a/ubus-example.c b/ubus-example.c
index 53d275b60d247faa85af7fc90804364f4ca48ec2..a7df06fd65487a068f3ff2aad0d9da5449d5f144 100644 (file)
--- a/ubus-example.c
+++ b/ubus-example.c
@@ -17,7 +17,7 @@
 
 static struct ubus_context *ctx;
 static struct ubus_watch_object test_event;
-struct blob_buf b;
+static struct blob_buf b;
 
 enum {
        HELLO_ID,
@@ -30,24 +30,43 @@ static const struct blobmsg_policy hello_policy[] = {
        [HELLO_MSG] = { .name = "msg", .type = BLOBMSG_TYPE_STRING },
 };
 
+struct hello_request {
+       struct ubus_request_data req;
+       struct uloop_timeout timeout;
+       char data[];
+};
+
+static void test_hello_reply(struct uloop_timeout *t)
+{
+       struct hello_request *req = container_of(t, struct hello_request, timeout);
+
+       blob_buf_init(&b, 0);
+       blobmsg_add_string(&b, "message", req->data);
+       ubus_send_reply(ctx, &req->req, b.head);
+       ubus_complete_deferred_request(ctx, &req->req, 0);
+       free(req);
+}
+
 static int test_hello(struct ubus_context *ctx, struct ubus_object *obj,
                      struct ubus_request_data *req, const char *method,
                      struct blob_attr *msg)
 {
+       struct hello_request *hreq;
        struct blob_attr *tb[__HELLO_MAX];
-       char *msgstr = "(unknown)";
-       char *strbuf;
+       const char *format = "%s received a message: %s";
+       const char *msgstr = "(unknown)";
 
        blobmsg_parse(hello_policy, ARRAY_SIZE(hello_policy), tb, blob_data(msg), blob_len(msg));
 
        if (tb[HELLO_MSG])
                msgstr = blobmsg_data(tb[HELLO_MSG]);
 
-       blob_buf_init(&b, 0);
-       strbuf = blobmsg_alloc_string_buffer(&b, "message", 64 + strlen(obj->name) + strlen(msgstr));
-       sprintf(strbuf, "%s received a message: %s", obj->name, msgstr);
-       blobmsg_add_string_buffer(&b);
-       ubus_send_reply(ctx, req, b.head);
+       hreq = calloc(1, sizeof(*hreq) + strlen(format) + strlen(obj->name) + strlen(msgstr) + 1);
+       sprintf(hreq->data, format, obj->name, msgstr);
+       ubus_defer_request(ctx, req, &hreq->req);
+       hreq->timeout.cb = test_hello_reply;
+       uloop_timeout_set(&hreq->timeout, 1000);
+
        return 0;
 }