236 lines
7.5 KiB
C
236 lines
7.5 KiB
C
/*
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* Copyright (c) 2011, Institute for Pervasive Computing, ETH Zurich
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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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* An abstraction layer for RESTful Web services
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* \author
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* Matthias Kovatsch <kovatsch@inf.ethz.ch>
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*/
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#include "contiki.h"
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#include <string.h> /*for string operations in match_addresses*/
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#include <stdio.h> /*for sprintf in rest_set_header_**/
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#include "erbium.h"
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#define DEBUG 0
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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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PROCESS_NAME(rest_manager_process);
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LIST(restful_services);
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LIST(restful_periodic_services);
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void
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rest_init_engine(void)
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{
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list_init(restful_services);
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REST.set_service_callback(rest_invoke_restful_service);
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/* Start the RESTful server implementation. */
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REST.init();
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/*Start rest manager process*/
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process_start(&rest_manager_process, NULL);
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}
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void
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rest_activate_resource(resource_t* resource)
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{
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PRINTF("Activating: %s", resource->url);
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if (!resource->pre_handler)
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{
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rest_set_pre_handler(resource, REST.default_pre_handler);
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}
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if (!resource->post_handler)
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{
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rest_set_post_handler(resource, REST.default_post_handler);
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}
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list_add(restful_services, resource);
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}
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void
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rest_activate_periodic_resource(periodic_resource_t* periodic_resource)
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{
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list_add(restful_periodic_services, periodic_resource);
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rest_activate_resource(periodic_resource->resource);
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rest_set_post_handler(periodic_resource->resource, REST.subscription_handler);
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}
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void
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rest_activate_event_resource(resource_t* resource)
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{
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rest_activate_resource(resource);
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rest_set_post_handler(resource, REST.subscription_handler);
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}
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list_t
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rest_get_resources(void)
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{
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return restful_services;
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}
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void*
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rest_get_user_data(resource_t* resource)
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{
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return resource->user_data;
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}
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void
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rest_set_user_data(resource_t* resource, void* user_data)
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{
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resource->user_data = user_data;
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}
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void
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rest_set_pre_handler(resource_t* resource, restful_pre_handler pre_handler)
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{
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resource->pre_handler = pre_handler;
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}
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void
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rest_set_post_handler(resource_t* resource, restful_post_handler post_handler)
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{
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resource->post_handler = post_handler;
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}
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void
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rest_set_special_flags(resource_t* resource, rest_resource_flags_t flags)
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{
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resource->flags |= flags;
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}
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int
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rest_invoke_restful_service(void* request, void* response, uint8_t *buffer, uint16_t buffer_size, int32_t *offset)
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{
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uint8_t found = 0;
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uint8_t allowed = 0;
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PRINTF("rest_invoke_restful_service url /%.*s -->\n", url_len, url);
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resource_t* resource = NULL;
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const char *url = NULL;
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for (resource = (resource_t*)list_head(restful_services); resource; resource = resource->next)
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{
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/*if the web service handles that kind of requests and urls matches*/
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if ((REST.get_url(request, &url)==strlen(resource->url) || (REST.get_url(request, &url)>strlen(resource->url) && (resource->flags & HAS_SUB_RESOURCES)))
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&& strncmp(resource->url, url, strlen(resource->url)) == 0)
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{
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found = 1;
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rest_resource_flags_t method = REST.get_method_type(request);
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PRINTF("method %u, resource->flags %u\n", (uint16_t)method, resource->flags);
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if (resource->flags & method)
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{
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allowed = 1;
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/*call pre handler if it exists*/
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if (!resource->pre_handler || resource->pre_handler(resource, request, response))
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{
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/* call handler function*/
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resource->handler(request, response, buffer, buffer_size, offset);
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/*call post handler if it exists*/
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if (resource->post_handler)
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{
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resource->post_handler(resource, request, response);
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}
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}
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} else {
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REST.set_response_status(response, REST.status.METHOD_NOT_ALLOWED);
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}
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break;
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}
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}
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if (!found) {
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REST.set_response_status(response, REST.status.NOT_FOUND);
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}
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return found & allowed;
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}
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/*-----------------------------------------------------------------------------------*/
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PROCESS(rest_manager_process, "Rest Process");
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PROCESS_THREAD(rest_manager_process, ev, data)
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{
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PROCESS_BEGIN();
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PROCESS_PAUSE();
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/* Initialize the PERIODIC_RESOURCE timers, which will be handled by this process. */
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periodic_resource_t* periodic_resource = NULL;
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for (periodic_resource = (periodic_resource_t*) list_head(restful_periodic_services); periodic_resource; periodic_resource = periodic_resource->next) {
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if (periodic_resource->period) {
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PRINTF("Periodic: Set timer for %s to %lu\n", periodic_resource->resource->url, periodic_resource->period);
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etimer_set(&periodic_resource->periodic_timer, periodic_resource->period);
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}
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}
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while (1) {
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PROCESS_WAIT_EVENT();
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if (ev == PROCESS_EVENT_TIMER) {
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for (periodic_resource = (periodic_resource_t*)list_head(restful_periodic_services);periodic_resource;periodic_resource = periodic_resource->next) {
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if (periodic_resource->period && etimer_expired(&periodic_resource->periodic_timer)) {
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PRINTF("Periodic: etimer expired for /%s (period: %lu)\n", periodic_resource->resource->url, periodic_resource->period);
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/* Call the periodic_handler function if it exists. */
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if (periodic_resource->periodic_handler) {
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(periodic_resource->periodic_handler)(periodic_resource->resource);
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}
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etimer_reset(&periodic_resource->periodic_timer);
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}
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}
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}
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}
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PROCESS_END();
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}
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