osd-contiki/apps/time/resource_gmtime.c
Ralf Schlatterbeck f48566d51f Add wallclock time handling
New application and new example.
We use the built-in timer routines and add an offset to get the
wallclock time. The offset can be set by time-changing routines
(currently only settimeofday).
We also maintain an offset for timezone handling but this isn't
currently fully implemented.
2014-05-29 17:31:19 +02:00

127 lines
2.8 KiB
C

/**
* \file
* Resource for gmtime (utc) / localtime handling
* \author
* Ralf Schlatterbeck <rsc@runtux.com>
*
* \brief get time as a string in utc or localtime
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "contiki.h"
#include "time.h"
#include "time_resource.h"
#include "jsonparse.h"
/* Only coap 13 for now */
#include "er-coap-13.h"
RESOURCE \
( localtime
, METHOD_GET
, "clock/localtime"
, "title=\"Time\";rt=\"localtime\""
);
RESOURCE \
( gmtime
, METHOD_GET
, "clock/utc"
, "title=\"Time\";rt=\"utc\""
);
void
time_handler
( void* request
, void* response
, uint8_t *buffer
, uint16_t preferred_size
, int32_t *offset
, struct tm *(*method)(const time_t *,struct tm *)
)
{
int success = 1;
char temp[100];
int index = 0;
int length = 0; /* |<-------->| */
struct timeval tv;
struct tm tm;
int i = 0;
int n_acc = 0;
const uint16_t *accept = NULL;
uint16_t a_ctype = REST.type.APPLICATION_JSON; /* for now json is default */
/* Looks like accepted content-type isn't currently supported */
n_acc = REST.get_header_accept (request, &accept);
for (i=0; i<n_acc; i++) {
if ( accept [i] == REST.type.TEXT_PLAIN
|| accept [i] == REST.type.APPLICATION_JSON
)
{
a_ctype = accept [i];
break;
}
}
switch(REST.get_method_type(request)){
case METHOD_GET:
gettimeofday (&tv, NULL);
method (&tv.tv_sec, &tm);
if (a_ctype == REST.type.TEXT_PLAIN) {
index += sprintf
( temp + index
, "%lu-%02u-%02u %02u:%02u:%02u\n"
, 1900 + tm.tm_year
, tm.tm_mon, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec
);
} else { // jSON Format
index += sprintf
( temp + index
,"{\n \"localtime\" : \"%lu-%02u-%02u %02u:%02u:%02u\"\n"
, 1900 + tm.tm_year
, tm.tm_mon, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec
);
index += sprintf(temp + index,"}\n");
}
length = strlen(temp);
memcpy (buffer, temp, length);
REST.set_header_content_type (response, REST.type.APPLICATION_JSON);
REST.set_response_payload (response, buffer, length);
break;
default:
success = 0;
}
if (!success) {
REST.set_response_status(response, REST.status.BAD_REQUEST);
}
}
void
localtime_handler
( void* request
, void* response
, uint8_t *buffer
, uint16_t preferred_size
, int32_t *offset
)
{
return time_handler
(request, response, buffer, preferred_size, offset, &localtime_r);
}
void
gmtime_handler
( void* request
, void* response
, uint8_t *buffer
, uint16_t preferred_size
, int32_t *offset
)
{
return time_handler
(request, response, buffer, preferred_size, offset, &gmtime_r);
}