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coap-server: Add in FETCH example

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Jon Shallow committed 2021-05-21 13:52:45 +01:00
1 parent f726d0460a
commit 587f7e574c
1 file changed
+22 -10
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examples/coap-server.c
+22 -10
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@@ -241,16 +241,20 @@ hnd_get_index(coap_resource_t *resource,
}
static void
hnd_get_time(coap_resource_t *resource,
coap_session_t *session,
const coap_pdu_t *request,
const coap_string_t *query,
coap_pdu_t *response) {
hnd_get_fetch_time(coap_resource_t *resource,
coap_session_t *session,
const coap_pdu_t *request,
const coap_string_t *query,
coap_pdu_t *response) {
unsigned char buf[40];
size_t len;
time_t now;
coap_tick_t t;
(void)request;
coap_pdu_code_t code = coap_pdu_get_code(request);
size_t size;
const uint8_t *data;
coap_str_const_t *ticks = coap_make_str_const("ticks");
if (my_clock_base) {
@@ -258,11 +262,18 @@ hnd_get_time(coap_resource_t *resource,
coap_ticks(&t);
now = my_clock_base + (t / COAP_TICKS_PER_SECOND);
if (query != NULL
&& coap_string_equal(query, coap_make_str_const("ticks"))) {
/* output ticks */
len = snprintf((char *)buf, sizeof(buf), "%u", (unsigned int)now);
/* coap_get_data() sets size to 0 on error */
(void)coap_get_data(request, &size, &data);
if (code == COAP_REQUEST_CODE_GET && query != NULL &&
coap_string_equal(query, ticks)) {
/* parameter is in query, output ticks */
len = snprintf((char *)buf, sizeof(buf), "%u", (unsigned int)now);
}
else if (code == COAP_REQUEST_CODE_FETCH && size == ticks->length &&
memcmp(data, ticks->s, ticks->length) == 0) {
/* parameter is in data, output ticks */
len = snprintf((char *)buf, sizeof(buf), "%u", (unsigned int)now);
} else { /* output human-readable time */
struct tm *tmp;
tmp = gmtime(&now);
@@ -1738,7 +1749,8 @@ init_resources(coap_context_t *ctx) {
my_clock_base = clock_offset;
r = coap_resource_init(coap_make_str_const("time"), resource_flags);
coap_register_handler(r, COAP_REQUEST_GET, hnd_get_time);
coap_register_handler(r, COAP_REQUEST_GET, hnd_get_fetch_time);
coap_register_handler(r, COAP_REQUEST_FETCH, hnd_get_fetch_time);
coap_register_handler(r, COAP_REQUEST_PUT, hnd_put_time);
coap_register_handler(r, COAP_REQUEST_DELETE, hnd_delete_time);
coap_resource_set_get_observable(r, 1);