osd-contiki/apps/rest-common/rest.c

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#include "contiki.h"
#include <string.h> /*for string operations in match_addresses*/
#include "rest.h"
#include "buffer.h"
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#define DEBUG 0
#if DEBUG
#include <stdio.h>
#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 ", ((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(...)
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#define PRINT6ADDR(addr)
#define PRINTLLADDR(addr)
#endif
/*FIXME it is possible to define some of the rest functions as MACROs rather than functions full of ifdefs.*/
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PROCESS_NAME(rest_manager_process);
LIST(restful_services);
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LIST(restful_periodic_services);
void
rest_init(void)
{
list_init(restful_services);
#ifdef WITH_COAP
coap_set_service_callback(rest_invoke_restful_service);
#else /*WITH_COAP*/
http_set_service_callback(rest_invoke_restful_service);
#endif /*WITH_COAP*/
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/*Start rest framework process*/
process_start(&rest_manager_process, NULL);
}
void
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rest_activate_resource(resource_t* resource)
{
/*add it to the restful web service link list*/
list_add(restful_services, resource);
}
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void
rest_activate_periodic_resource(periodic_resource_t* periodic_resource)
{
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list_add(restful_periodic_services, periodic_resource);
rest_activate_resource(periodic_resource->resource);
}
void
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rest_set_user_data(resource_t* resource, void* user_data)
{
resource->user_data = user_data;
}
void*
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rest_get_user_data(resource_t* resource)
{
return resource->user_data;
}
void
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rest_set_pre_handler(resource_t* resource, restful_pre_handler pre_handler)
{
resource->pre_handler = pre_handler;
}
void
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rest_set_post_handler(resource_t* resource, restful_post_handler post_handler)
{
resource->post_handler = post_handler;
}
list_t
rest_get_resources(void)
{
return restful_services;
}
void
rest_set_response_status(RESPONSE* response, status_code_t status)
{
#ifdef WITH_COAP
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coap_set_code(response, status);
#else /*WITH_COAP*/
http_set_status(response, status);
#endif /*WITH_COAP*/
}
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#ifdef WITH_COAP
static method_t coap_to_rest_method(coap_method_t method)
{
return (method_t)(1 << (method - 1));
}
static coap_method_t rest_to_coap_method(method_t method)
{
coap_method_t coap_method = COAP_GET;
switch (method) {
case METHOD_GET:
coap_method = COAP_GET;
break;
case METHOD_POST:
coap_method = COAP_POST;
break;
case METHOD_PUT:
coap_method = COAP_PUT;
break;
case METHOD_DELETE:
coap_method = COAP_DELETE;
break;
default:
break;
}
return coap_method;
}
#endif /*WITH_COAP*/
method_t
rest_get_method_type(REQUEST* request)
{
#ifdef WITH_COAP
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return coap_to_rest_method(coap_get_method(request));
#else
return (method_t)(request->request_type);
#endif
}
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/*Only defined for COAP for now.*/
#ifdef WITH_COAP
void
rest_set_method_type(REQUEST* request, method_t method)
{
coap_set_method(request, rest_to_coap_method(method));
}
#endif /*WITH_COAP*/
void
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rest_set_response_payload(RESPONSE* response, uint8_t* payload, uint16_t size)
{
#ifdef WITH_COAP
coap_set_payload(response, payload, size);
#else
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http_set_res_payload(response, payload, size);
#endif /*WITH_COAP*/
}
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/*Only defined for COAP for now.*/
#ifdef WITH_COAP
void
rest_set_request_payload(REQUEST* request, uint8_t* payload, uint16_t size)
{
coap_set_payload(request, payload, size);
}
#endif /*WITH_COAP*/
int
rest_get_query_variable(REQUEST* request, const char *name, char* output, uint16_t output_size)
{
#ifdef WITH_COAP
return coap_get_query_variable(request, name, output, output_size);
#else
return http_get_query_variable(request, name, output, output_size);
#endif /*WITH_COAP*/
}
int
rest_get_post_variable(REQUEST* request, const char *name, char* output, uint16_t output_size)
{
#ifdef WITH_COAP
return coap_get_post_variable(request, name, output, output_size);
#else
return http_get_post_variable(request, name, output, output_size);
#endif /*WITH_COAP*/
}
content_type_t
rest_get_header_content_type(REQUEST* request)
{
#ifdef WITH_COAP
return coap_get_header_content_type(request);
#else
return http_get_header_content_type(request);
#endif /*WITH_COAP*/
}
int
rest_set_header_content_type(RESPONSE* response, content_type_t content_type)
{
#ifdef WITH_COAP
return coap_set_header_content_type(response, content_type);
#else
return http_set_res_header(response, HTTP_HEADER_NAME_CONTENT_TYPE, http_get_content_type_string(content_type), 1);
#endif /*WITH_COAP*/
}
int
rest_set_header_etag(RESPONSE* response, uint8_t* etag, uint8_t size)
{
#ifdef WITH_COAP
return coap_set_header_etag(response, etag, size);
#else
/*FIXME for now etag should be a "/0" ending string for http part*/
char temp_etag[10];
memcpy(temp_etag, etag, size);
temp_etag[size] = 0;
return http_set_res_header(response, HTTP_HEADER_NAME_ETAG, temp_etag, 1);
#endif /*WITH_COAP*/
}
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int
rest_invoke_restful_service(REQUEST* request, RESPONSE* response)
{
int found = 0;
const char* url = request->url;
uint16_t url_len = request->url_len;
PRINTF("rest_invoke_restful_service url %s url_len %d -->\n", url, url_len);
resource_t* resource = NULL;
for (resource = (resource_t*)list_head(restful_services); resource; resource = resource->next) {
/*if the web service handles that kind of requests and urls matches*/
if (url && strlen(resource->url) == url_len && strncmp(resource->url, url, url_len) == 0){
found = 1;
method_t method = rest_get_method_type(request);
PRINTF("method %u, resource->methods_to_handle %u\n", (uint16_t)method, resource->methods_to_handle);
if (resource->methods_to_handle & method) {
/*FIXME Move somewhere else*/
#ifdef WITH_COAP
uint32_t lifetime = 0;
if (coap_get_header_subscription_lifetime(request, &lifetime)) {
PRINTF("Lifetime %lu\n", lifetime);
periodic_resource_t* periodic_resource = NULL;
for (periodic_resource = (periodic_resource_t*)list_head(restful_periodic_services);
periodic_resource;
periodic_resource = periodic_resource->next) {
if (periodic_resource->resource == resource) {
PRINTF("Periodic Resource Found\n");
PRINT6ADDR(&request->addr);
periodic_resource->lifetime = lifetime;
uip_ipaddr_copy(&periodic_resource->addr, &request->addr);
}
}
}
#endif /*WITH_COAP*/
/*call pre handler if it exists*/
if (!resource->pre_handler || resource->pre_handler(request, response)) {
/* call handler function*/
resource->handler(request, response);
/*call post handler if it exists*/
if (resource->post_handler) {
resource->post_handler(request, response);
}
}
} else {
rest_set_response_status(response, METHOD_NOT_ALLOWED_405);
}
break;
}
}
if (!found) {
rest_set_response_status(response, NOT_FOUND_404);
}
return found;
}
PROCESS(rest_manager_process, "Rest Process");
PROCESS_THREAD(rest_manager_process, ev, data)
{
PROCESS_BEGIN();
/*start the coap or http server*/
process_start(SERVER_PROCESS, NULL);
PROCESS_PAUSE();
/*Periodic resources are only available to COAP implementation*/
#ifdef WITH_COAP
periodic_resource_t* periodic_resource = NULL;
for (periodic_resource = (periodic_resource_t*)list_head(restful_periodic_services); periodic_resource; periodic_resource = periodic_resource->next) {
if (periodic_resource->period) {
PRINTF("Set timer for Res: %s to %u\n", periodic_resource->resource->url, periodic_resource->period);
etimer_set(periodic_resource->timer, CLOCK_SECOND * periodic_resource->period);
}
}
while(1) {
PROCESS_WAIT_EVENT();
if (ev == PROCESS_EVENT_TIMER) {
for (periodic_resource=(periodic_resource_t*)list_head(restful_periodic_services);periodic_resource;periodic_resource = periodic_resource->next) {
if (periodic_resource->period && etimer_expired(periodic_resource->timer)) {
PRINTF("Etimer expired for %s (period:%u life:%lu)\n", periodic_resource->resource->url, periodic_resource->period, periodic_resource->lifetime);
/*call the periodic handler function if exists*/
if (periodic_resource->periodic_handler) {
if ((periodic_resource->periodic_handler)(periodic_resource->resource) && periodic_resource->lifetime) {
resource_changed(periodic_resource);
}
/*Update lifetime*/
if (periodic_resource->lifetime > periodic_resource->period) {
periodic_resource->lifetime -= periodic_resource->period;
} else {
periodic_resource->lifetime = 0;
}
PRINTF("%s life upd:%lu\n", periodic_resource->resource->url, periodic_resource->lifetime);
}
etimer_reset(periodic_resource->timer);
}
}
}
}
#endif /*WITH_COAP*/
PROCESS_END();
}