2014-04-22 08:31:43 +00:00
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/*
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* Copyright (c) 2013, Institute for Pervasive Computing, ETH Zurich
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*/
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/**
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* \file
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* ETSI Plugtest resource
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* \author
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* Matthias Kovatsch <kovatsch@inf.ethz.ch>
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*/
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#include <string.h>
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#include "rest-engine.h"
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2017-09-01 15:45:50 +00:00
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#include "coap.h"
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#include "coap-observe.h"
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#include "plugtest.h"
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2014-04-22 08:31:43 +00:00
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static void res_get_handler(void *request, void *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset);
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static void res_put_handler(void *request, void *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset);
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static void res_delete_handler(void *request, void *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset);
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static void res_periodic_handler(void);
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PERIODIC_RESOURCE(res_plugtest_obs,
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"title=\"Observable resource which changes every 5 seconds\";obs",
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res_get_handler,
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NULL,
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res_put_handler,
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res_delete_handler,
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5 * CLOCK_SECOND,
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res_periodic_handler);
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static int32_t obs_counter = 0;
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static char obs_content[MAX_PLUGFEST_BODY];
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static size_t obs_content_len = 0;
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static unsigned int obs_format = 0;
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static char obs_status = 0;
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static void
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obs_purge_list()
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{
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PRINTF("### SERVER ACTION ### Purging obs list");
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coap_remove_observer_by_uri(NULL, 0, res_plugtest_obs.url);
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}
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static void
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res_get_handler(void *request, void *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset)
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{
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/* Keep server log clean from ticking events */
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if(request != NULL) {
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PRINTF("/obs GET\n");
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}
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REST.set_header_content_type(response, obs_format);
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REST.set_header_max_age(response, 5);
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if(obs_content_len) {
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REST.set_header_content_type(response, obs_format);
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REST.set_response_payload(response, obs_content, obs_content_len);
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} else {
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REST.set_header_content_type(response, REST.type.TEXT_PLAIN);
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REST.set_response_payload(response, obs_content,
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snprintf(obs_content, MAX_PLUGFEST_PAYLOAD, "TICK %lu", obs_counter));
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}
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/* A post_handler that handles subscriptions will be called for periodic resources by the REST framework. */
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}
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static void
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res_put_handler(void *request, void *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset)
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{
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uint8_t *incoming = NULL;
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unsigned int ct = -1;
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REST.get_header_content_type(request, &ct);
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PRINTF("/obs PUT\n");
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if(ct != obs_format) {
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obs_status = 1;
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obs_format = ct;
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} else {
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obs_content_len = REST.get_request_payload(request,
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(const uint8_t **)&incoming);
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memcpy(obs_content, incoming, obs_content_len);
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res_periodic_handler();
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}
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REST.set_response_status(response, REST.status.CHANGED);
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}
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static void
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res_delete_handler(void *request, void *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset)
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{
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PRINTF("/obs DELETE\n");
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obs_status = 2;
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REST.set_response_status(response, REST.status.DELETED);
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}
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/*
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* Additionally, a handler function named [resource name]_handler must be implemented for each PERIODIC_RESOURCE.
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* It will be called by the REST manager process with the defined period.
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*/
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static void
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res_periodic_handler()
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{
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++obs_counter;
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/* PRINTF("TICK %u for /%s\n", obs_counter, r->url); */
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if(obs_status == 1) {
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/* Notify the registered observers with the given message type, observe option, and payload. */
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REST.notify_subscribers(&res_plugtest_obs);
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PRINTF("######### sending 5.00\n");
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obs_purge_list();
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} else if(obs_status == 2) {
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/* Notify the registered observers with the given message type, observe option, and payload. */
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REST.notify_subscribers(&res_plugtest_obs);
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obs_purge_list();
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obs_counter = 0;
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obs_content_len = 0;
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} else {
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/* Notify the registered observers with the given message type, observe option, and payload. */
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REST.notify_subscribers(&res_plugtest_obs);
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} obs_status = 0;
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}
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