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"
#define DEBUG 1
#if DEBUG
#include <stdio.h>
#define PRINTF(...) printf(__VA_ARGS__)
#else
#define PRINTF(...)
#endif
/*FIXME it is possible to define some of the rest functions as MACROs rather than functions full of ifdefs.*/
LIST(restful_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*/
//start the coap server
process_start(SERVER_PROCESS, NULL);
}
void
rest_activate_resource(Resource_t* resource)
{
/*add it to the restful web service link list*/
list_add(restful_services, resource);
}
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*/
/*FIXME Need to make case insensitive?*/
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);
//DY FIX_ME resources can only handle 1 method currently anyway, fix this
if ( resource->methods_to_handle & method ) {
/*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;
}
void
rest_set_user_data(Resource_t* resource, void* user_data)
{
resource->user_data = user_data;
}
void*
rest_get_user_data(Resource_t* resource)
{
return resource->user_data;
}
void
rest_set_pre_handler(Resource_t* resource, restful_pre_handler pre_handler)
{
resource->pre_handler = pre_handler;
}
void
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
coap_set_code(response, (uint8_t)status);
#else /*WITH_COAP*/
http_set_status(response, status);
#endif /*WITH_COAP*/
}
method_t
rest_get_method_type(REQUEST* request)
{
#ifdef WITH_COAP
return (method_t)((request->code) << (request->code - 1));
#else
return (method_t)(request->request_type);
#endif
}
void
rest_set_payload(RESPONSE* response, uint8_t* payload, uint16_t size)
{
#ifdef WITH_COAP
coap_set_payload(response, payload, size);
#else
http_set_payload(response, 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*/
}