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Support cancellation of observe relationships using GET w/ Observe: 1.

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Adding and removal of observes is now handled by libcoap. The application's
GET handler only needs to add the Observe option (see server.c:hnd_get_time()).
This commit is contained in:
Olaf Bergmann committed 2014-03-09 02:27:52 +00:00
1 parent 1b3aa704e6
commit a3fae3ce3a
7 files changed
+108 -34
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examples/server.c
+3 -11
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@@ -83,7 +83,6 @@ hnd_get_time(coap_context_t *ctx, struct coap_resource_t *resource,
size_t len;
time_t now;
coap_tick_t t;
coap_subscription_t *subscription;
/* FIXME: return time, e.g. in human-readable by default and ticks
* when query ?ticks is given. */
@@ -92,19 +91,12 @@ hnd_get_time(coap_context_t *ctx, struct coap_resource_t *resource,
response->hdr->code =
my_clock_base ? COAP_RESPONSE_CODE(205) : COAP_RESPONSE_CODE(404);
if (request != NULL &&
coap_check_option(request, COAP_OPTION_OBSERVE, &opt_iter)) {
subscription = coap_add_observer(resource, peer, token);
if (subscription) {
subscription->non = request->hdr->type == COAP_MESSAGE_NON;
coap_add_option(response, COAP_OPTION_OBSERVE, 0, NULL);
}
}
if (resource->dirty == 1)
if (coap_find_observer(resource, peer, token)) {
/* FIXME: need to check for resource->dirty? */
coap_add_option(response, COAP_OPTION_OBSERVE,
coap_encode_var_bytes(buf, ctx->observe), buf);
}
if (my_clock_base)
coap_add_option(response, COAP_OPTION_CONTENT_FORMAT,
coap_encode_var_bytes(buf, COAP_MEDIATYPE_TEXT_PLAIN), buf);