osd-contiki/examples/rest-example/rest-example.c

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#include <stdio.h>
#include <stdlib.h>
#include "contiki.h"
#include "contiki-net.h"
#include "dev/leds.h"
#include "rest.h"
PROCESS(rest_example, "Rest Example");
AUTOSTART_PROCESSES(&rest_example);
#define DEBUG 1
#if DEBUG
#include <stdio.h>
#define PRINTF(...) printf(__VA_ARGS__)
#define PRINT6ADDR(addr) PRINTF(" %02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x ", ((u8_t *)addr)[0], ((u8_t *)addr)[1], ((u8_t *)addr)[2], ((u8_t *)addr)[3], ((u8_t *)addr)[4], ((u8_t *)addr)[5], ((u8_t *)addr)[6], ((u8_t *)addr)[7], ((u8_t *)addr)[8], ((u8_t *)addr)[9], ((u8_t *)addr)[10], ((u8_t *)addr)[11], ((u8_t *)addr)[12], ((u8_t *)addr)[13], ((u8_t *)addr)[14], ((u8_t *)addr)[15])
#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])
#else
#define PRINTF(...)
#define PRINT6ADDR(addr)
#define PRINTLLADDR(addr)
#endif
char temp[100];
/* Resources are defined by RESOURCE macro, signature: resource name, the http methods it handles and its url*/
RESOURCE(helloworld, METHOD_GET, "helloworld");
/* For each resource defined, there corresponds an handler method which should be defined too.
* Name of the handler method should be [resource name]_handler
* */
void
helloworld_handler(REQUEST* request, RESPONSE* response)
{
sprintf(temp,"Hello World!\n");
rest_set_header_content_type(response, TEXT_PLAIN);
rest_set_payload(response, temp, strlen(temp));
}
/*A simple actuator example, depending on the color query parameter and post variable mode, corresponding led is activated or deactivated*/
RESOURCE(led, METHOD_POST | METHOD_PUT , "led");
void
led_handler(REQUEST* request, RESPONSE* response)
{
char color[10];
char mode[10];
uint8_t led = 0;
int success = 1;
if (rest_get_query_variable(request, "color", color, 10)) {
PRINTF("color %s\n", color);
if (!strcmp(color,"red")) {
led = LEDS_RED;
} else if(!strcmp(color,"green")) {
led = LEDS_GREEN;
} else if ( !strcmp(color,"blue") ) {
led = LEDS_BLUE;
} else {
success = 0;
}
} else {
success = 0;
}
if (success && rest_get_post_variable(request, "mode", mode, 10)) {
PRINTF("mode %s\n", mode);
if (!strcmp(mode, "on")) {
leds_on(led);
} else if (!strcmp(mode, "off")) {
leds_off(led);
} else {
success = 0;
}
} else {
success = 0;
}
if (!success) {
rest_set_response_status(response, BAD_REQUEST_400);
}
}
/*A simple getter example. Returns the reading from light sensor with a simple etag*/
RESOURCE(light, METHOD_GET, "light");
void
light_handler(REQUEST* request, RESPONSE* response)
{
sprintf(temp,"%d.%d", 131,6);
char etag[4] = "ABCD";
rest_set_header_content_type(response, TEXT_PLAIN);
rest_set_header_etag(response, etag, sizeof(etag));
rest_set_payload(response, temp, strlen(temp));
}
/*A simple actuator example. Toggles the red led*/
RESOURCE(toggle, METHOD_GET | METHOD_PUT | METHOD_POST, "toggle");
void
toggle_handler(REQUEST* request, RESPONSE* response)
{
leds_toggle(LEDS_RED);
}
RESOURCE(discover, METHOD_GET, ".well-known/core");
void
discover_handler(REQUEST* request, RESPONSE* response)
{
char temp[100];
int index = 0;
index += sprintf(temp + index, "%s\n", "<helloworld>;n=\"HelloWorld\"");
index += sprintf(temp + index, "%s\n", "<led>;n=\"LedControl\"");
index += sprintf(temp + index, "%s\n", "<light>;n=\"Light\"");
rest_set_payload(response, temp, strlen(temp));
rest_set_header_content_type(response, APPLICATION_LINK_FORMAT);
}
PROCESS_THREAD(rest_example, ev, data)
{
PROCESS_BEGIN();
PRINTF("REST Example\n");
rest_init();
rest_activate_resource(&resource_helloworld);
rest_activate_resource(&resource_led);
rest_activate_resource(&resource_light);
rest_activate_resource(&resource_toggle);
rest_activate_resource(&resource_discover);
PROCESS_END();
}