d5284eebe1
Now there is a generic resource that can generate and parse application/json as well as text/plain. It can be re-used, only the from_string and to_string routines have to be written and the resource properly set up. A new resource format is specified, see GENERIC_RESOURCE in, e.g., examples/osd/pwm-example. This is now used in all my examples, namely pwm-example, arduino-sketch, wallclock-time. There was an off by one error for the month in time formatting (in gmtime and localtime). And the leap-year computation was broken. Both fixed now, so we get a correct date. For localtime we are still 2 hours off because daylight saving isn't implemented yet. Also renamed gmtime to utc.
298 lines
10 KiB
C
298 lines
10 KiB
C
/*
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* Copyright (C) 2011, Matthias Kovatsch and other contributors.
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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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* Erbium (Er) Wallclock REST Engine example (with CoAP-specific code)
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* \author
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* Matthias Kovatsch <kovatsch@inf.ethz.ch>
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* Ralf Schlatterbeck <rsc@runtux.com>
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "contiki.h"
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#include "contiki-net.h"
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#include "time.h"
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#include "time_resource.h"
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#include "jsonparse.h"
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/* Define which resources to include to meet memory constraints. */
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#define REST_RES_INFO 1
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#define REST_RES_LEDS 1
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#define REST_RES_TOGGLE 0
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#define REST_RES_BATTERY 1
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#include "erbium.h"
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#if defined (PLATFORM_HAS_BUTTON)
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#include "dev/button-sensor.h"
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#endif
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#if defined (PLATFORM_HAS_LEDS)
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#include "dev/leds.h"
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#endif
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#if defined (PLATFORM_HAS_BATTERY)
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#include "dev/battery-sensor.h"
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#endif
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/* For CoAP-specific example: not required for normal RESTful Web service. */
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#if WITH_COAP == 3
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#include "er-coap-03.h"
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#elif WITH_COAP == 7
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#include "er-coap-07.h"
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#elif WITH_COAP == 12
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#include "er-coap-12.h"
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#elif WITH_COAP == 13
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#include "er-coap-13.h"
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#else
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#warning "Erbium example without CoAP-specifc functionality"
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#endif /* CoAP-specific example */
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#define DEBUG 1
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#if DEBUG
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#define PRINTF(...) printf(__VA_ARGS__)
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#define PRINT6ADDR(addr) PRINTF("[%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x]", ((uint8_t *)addr)[0], ((uint8_t *)addr)[1], ((uint8_t *)addr)[2], ((uint8_t *)addr)[3], ((uint8_t *)addr)[4], ((uint8_t *)addr)[5], ((uint8_t *)addr)[6], ((uint8_t *)addr)[7], ((uint8_t *)addr)[8], ((uint8_t *)addr)[9], ((uint8_t *)addr)[10], ((uint8_t *)addr)[11], ((uint8_t *)addr)[12], ((uint8_t *)addr)[13], ((uint8_t *)addr)[14], ((uint8_t *)addr)[15])
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#define PRINTLLADDR(lladdr) PRINTF("[%02x:%02x:%02x:%02x:%02x:%02x]",(lladdr)->addr[0], (lladdr)->addr[1], (lladdr)->addr[2], (lladdr)->addr[3],(lladdr)->addr[4], (lladdr)->addr[5])
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#else
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#define PRINTF(...)
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#define PRINT6ADDR(addr)
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#define PRINTLLADDR(addr)
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#endif
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/******************************************************************************/
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#if REST_RES_INFO
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/*
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* Resources are defined by the RESOURCE macro.
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* Signature: resource name, the RESTful methods it handles, and its URI path (omitting the leading slash).
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*/
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RESOURCE(info, METHOD_GET, "info", "title=\"Info\";rt=\"text\"");
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/*
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* A handler function named [resource name]_handler must be implemented for each RESOURCE.
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* A buffer for the response payload is provided through the buffer pointer. Simple resources can ignore
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* preferred_size and offset, but must respect the REST_MAX_CHUNK_SIZE limit for the buffer.
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* If a smaller block size is requested for CoAP, the REST framework automatically splits the data.
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*/
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void
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info_handler(void* request, void* response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset)
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{
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char message[100];
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int index = 0;
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int length = 0; /* |<-------->| */
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/* Some data that has the length up to REST_MAX_CHUNK_SIZE. For more, see the chunk resource. */
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// jSON Format
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index += sprintf(message + index,"{\n \"Version\" : \"V1.0pre1\",\n");
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index += sprintf(message + index," \"name\" : \"Wallclock-time\"\n");
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index += sprintf(message + index,"}\n");
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length = strlen(message);
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memcpy(buffer, message,length );
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REST.set_header_content_type(response, REST.type.APPLICATION_JSON);
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REST.set_response_payload(response, buffer, length);
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}
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#endif
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/******************************************************************************/
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#if defined (PLATFORM_HAS_LEDS)
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/******************************************************************************/
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#if REST_RES_LEDS
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/*A simple actuator example, depending on the color query parameter and post variable mode, corresponding led is activated or deactivated*/
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RESOURCE(leds, METHOD_POST | METHOD_PUT , "actuators/leds", "title=\"LEDs: ?color=r|g|b, POST/PUT mode=on|off\";rt=\"Control\"");
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void
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leds_handler(void* request, void* response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset)
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{
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size_t len = 0;
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const char *color = NULL;
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const char *mode = NULL;
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uint8_t led = 0;
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int success = 1;
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if ((len=REST.get_query_variable(request, "color", &color))) {
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PRINTF("color %.*s\n", len, color);
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if (strncmp(color, "r", len)==0) {
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led = LEDS_RED;
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} else if(strncmp(color,"g", len)==0) {
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led = LEDS_GREEN;
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} else if (strncmp(color,"b", len)==0) {
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led = LEDS_BLUE;
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} else {
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success = 0;
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}
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} else {
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success = 0;
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}
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if (success && (len=REST.get_post_variable(request, "mode", &mode))) {
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PRINTF("mode %s\n", mode);
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if (strncmp(mode, "on", len)==0) {
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leds_on(led);
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} else if (strncmp(mode, "off", len)==0) {
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leds_off(led);
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} else {
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success = 0;
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}
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} else {
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success = 0;
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}
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if (!success) {
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REST.set_response_status(response, REST.status.BAD_REQUEST);
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}
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}
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#endif
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/******************************************************************************/
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#if REST_RES_TOGGLE
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/* A simple actuator example. Toggles the red led */
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RESOURCE(toggle, METHOD_GET | METHOD_PUT | METHOD_POST, "actuators/toggle", "title=\"Red LED\";rt=\"Control\"");
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void
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toggle_handler(void* request, void* response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset)
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{
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leds_toggle(LEDS_RED);
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}
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#endif
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#endif /* PLATFORM_HAS_LEDS */
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/******************************************************************************/
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/******************************************************************************/
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/******************************************************************************/
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#if REST_RES_BATTERY && defined (PLATFORM_HAS_BATTERY)
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/* A simple getter example. Returns the reading from light sensor with a simple etag */
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RESOURCE(battery, METHOD_GET, "sensors/battery", "title=\"Battery status\";rt=\"battery-mV\"");
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void
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battery_handler(void* request, void* response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset)
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{
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int battery = battery_sensor.value(0);
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const uint16_t *accept = NULL;
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int num = REST.get_header_accept(request, &accept);
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if ((num==0) || (num && accept[0]==REST.type.TEXT_PLAIN))
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{
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REST.set_header_content_type(response, REST.type.TEXT_PLAIN);
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snprintf((char *)buffer, REST_MAX_CHUNK_SIZE, "%d", battery);
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REST.set_response_payload(response, (uint8_t *)buffer, strlen((char *)buffer));
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}
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else if (num && (accept[0]==REST.type.APPLICATION_JSON))
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{
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REST.set_header_content_type(response, REST.type.APPLICATION_JSON);
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snprintf((char *)buffer, REST_MAX_CHUNK_SIZE, "{'battery':%d}", battery);
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REST.set_response_payload(response, buffer, strlen((char *)buffer));
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}
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else
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{
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REST.set_response_status(response, REST.status.NOT_ACCEPTABLE);
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const char *msg = "Supporting content-types text/plain and application/json";
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REST.set_response_payload(response, msg, strlen(msg));
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}
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}
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#endif /* PLATFORM_HAS_BATTERY */
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/******************************************************************************/
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void
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hw_init()
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{
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#if defined (PLATFORM_HAS_LEDS)
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leds_off(LEDS_RED);
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#endif
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}
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PROCESS(rest_server_example, "Erbium Example Server");
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AUTOSTART_PROCESSES(&rest_server_example, &sensors_process);
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PROCESS_THREAD(rest_server_example, ev, data)
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{
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PROCESS_BEGIN();
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PRINTF("Starting Erbium Example Server\n");
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#ifdef RF_CHANNEL
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PRINTF("RF channel: %u\n", RF_CHANNEL);
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#endif
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#ifdef IEEE802154_PANID
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PRINTF("PAN ID: 0x%04X\n", IEEE802154_PANID);
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#endif
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PRINTF("uIP buffer: %u\n", UIP_BUFSIZE);
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PRINTF("LL header: %u\n", UIP_LLH_LEN);
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PRINTF("IP+UDP header: %u\n", UIP_IPUDPH_LEN);
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PRINTF("REST max chunk: %u\n", REST_MAX_CHUNK_SIZE);
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/* if static routes are used rather than RPL */
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#if !UIP_CONF_IPV6_RPL && !defined (CONTIKI_TARGET_MINIMAL_NET) && !defined (CONTIKI_TARGET_NATIVE)
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set_global_address();
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configure_routing();
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#endif
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/* Initialize the OSD Hardware. */
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hw_init();
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/* Initialize the REST engine. */
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rest_init_engine();
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/* Activate the application-specific resources. */
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#if REST_RES_INFO
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rest_activate_resource(&resource_info);
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#endif
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#if defined (PLATFORM_HAS_LEDS)
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#if REST_RES_LEDS
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rest_activate_resource(&resource_leds);
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#endif
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#if REST_RES_TOGGLE
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rest_activate_resource(&resource_toggle);
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#endif
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#endif /* PLATFORM_HAS_LEDS */
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#if defined (PLATFORM_HAS_BATTERY) && REST_RES_BATTERY
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SENSORS_ACTIVATE(battery_sensor);
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rest_activate_resource(&resource_battery);
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#endif
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rest_activate_resource(&resource_timestamp);
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rest_activate_resource(&resource_localtime);
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rest_activate_resource(&resource_utc);
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/* Define application-specific events here. */
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while(1) {
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PROCESS_WAIT_EVENT();
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} /* while (1) */
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PROCESS_END();
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}
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