720 lines
20 KiB
C++
720 lines
20 KiB
C++
/*!
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* Copyright (c) 2015-2018, NADAL Jean-Baptiste. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*
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* @Author: NADAL Jean-Baptiste
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* @Date: 16/06/2017
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*/
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/*------------------------------- INCLUDES ----------------------------------*/
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#include <string>
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#include <algorithm>
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#include <fmt/format.h>
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#include <dirent.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdlib.h>
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extern "C" {
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#include <libubox/ustream.h>
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#include <libubus.h>
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}
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#include <json-c/json.h>
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#include "core/web-connection.h"
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#include "core/http-header.h"
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#include "rest/rest-connection.h"
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#include "rest/rest-controller.h"
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#include "etag-rest/etag-rest-controller.h"
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#include "notification/notification-controller.h"
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#include "uhttp-server.h"
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#include <uhttpd/uhttpd.h>
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#include <uhttpd/plugin.h>
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/*------------------------------- GLOBALS ----------------------------------*/
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#define kResourcesKey "resources"
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#define kEtagControllerKey "etag_controller"
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#define kNotificationKey "notification"
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#define kControllerPathKey "path"
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#define kControllerModelNameKey "model_name"
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#define kControllerEventNameKey "event_name"
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#define kControllerEtagKey "etag_key"
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#define kControllerGetMethodKey "get_method"
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#define kControllerSetMethodKey "set_method"
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#define kControllerRawResponseKey "raw_response"
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#define kdefaultGetMethod "get"
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#define kdefaultSetMethod "set"
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#define kJsonControlerNotFound "{{\n" \
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" \"id\": \"{}\",\n" \
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" \"status\": \"failed\",\n" \
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" \"error\": \"Controller Not Found\",\n" \
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" \"response_code\": 404\n}}"
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#define DEBUG_REQUEST 1
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#define BUFFER_SIZE 100
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#ifdef DEBUG_REQUEST
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/*! ----------------------------------------------------------------------------
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* @fn log_with_timestamp
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*
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* @brief method to log with time stamp.
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*/
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void log_with_timestamp(const char *a_msg)
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{
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char the_buffer[512];
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time_t the_time;
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struct timeval the_timeval;
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the_time = time(NULL);
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strftime(the_buffer, sizeof(the_buffer), "%m/%d/%Y %H:%M:%S", localtime(&the_time));
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gettimeofday(&the_timeval, NULL);
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fprintf(stdout, "%s.%09ld - %s\n", the_buffer, the_timeval.tv_usec * 1000, a_msg);
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}
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double time_diff(struct timeval x, struct timeval y)
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{
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double x_ms, y_ms, diff;
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x_ms = (double)x.tv_sec * 1000000 + (double)x.tv_usec;
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y_ms = (double)y.tv_sec * 1000000 + (double)y.tv_usec;
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diff = (double)y_ms - (double)x_ms;
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return diff;
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}
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#endif
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/*! ----------------------------------------------------------------------------
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* @fn get_uhttp_server_ctx
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*
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* @brief method to return ubux context to c plugin.
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*/
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extern "C" struct ubus_context *get_uhttp_server_ctx(void)
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{
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return UhttpServer::get_instance().get_context();
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}
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/*! ----------------------------------------------------------------------------
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* @fn set_uhttp_server_ctx
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*
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* @brief init method from c plugin to uhttp server.
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*/
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extern "C" int uhttp_server_setup(struct ubus_context *a_ctx, const struct uhttpd_ops *an_ops, const char *a_config_dir_path)
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{
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return UhttpServer::get_instance().setup(a_ctx, an_ops, a_config_dir_path);
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}
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/*! ----------------------------------------------------------------------------
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* @fn uhttp_server_check_url
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*
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* @brief Check if the url is managed by this plugin
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*/
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extern "C" bool uhttp_server_check_url(const char *an_url)
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{
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return UhttpServer::get_instance().check_url(an_url);
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}
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/*! ----------------------------------------------------------------------------
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* @fn uhttp_server_handle_request
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*
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* @brief Handle the request.
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*/
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extern "C" void uhttp_server_handle_request(struct client *a_cl, char *an_url, struct path_info *a_pi)
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{
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#ifdef DEBUG_REQUEST
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gettimeofday(&a_cl->start_request, NULL);
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char buffer[BUFFER_SIZE];
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snprintf(buffer, sizeof(buffer), "uhttp handle_request : client id: %d - %s", a_cl->id, an_url);
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log_with_timestamp(buffer);
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#endif
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UhttpServer::get_instance().handle_request(a_cl, an_url, a_pi);
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}
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/*! ----------------------------------------------------------------------------
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* @fn uhttp_server_data_send
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*
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* @brief callback called when data should .
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*/
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static int uhttp_server_data_send(struct client *a_cl, const char *a_data, int a_len)
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{
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#ifdef DEBUG_REQUEST
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log_with_timestamp("uhttp_server_data_send");
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#endif
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return UhttpServer::get_instance().data_send(a_cl, a_data, a_len);
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}
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/*! ----------------------------------------------------------------------------
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* @fn uhttp_server_data_done
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*
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* @brief callback called when the server is ready to launch the request.
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*/
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static void uhttp_server_data_done(struct client *a_cl)
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{
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UhttpServer::get_instance().invoke_request(a_cl);
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}
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/*! ----------------------------------------------------------------------------
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* @fn uhttp_server_request_free
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*
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* @brief callback call to free the request.
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*/
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static void uhttp_server_request_free(struct client *a_cl)
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{
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#ifdef DEBUG_REQUEST
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struct timeval the_current_timeval;
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gettimeofday(&the_current_timeval, NULL);
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char buffer[BUFFER_SIZE];
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snprintf(buffer, sizeof(buffer), "client id: %d duree: %.0lf ms", a_cl->id, time_diff(a_cl->start_request, the_current_timeval) / 1000);
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log_with_timestamp(buffer);
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#endif
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UhttpServer::get_instance().request_free(a_cl);
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}
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/*! ----------------------------------------------------------------------------
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* @fn uhttp_server_close_fds
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*
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* @brief callback call when the process close. (needed ? to be dfefined).
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*/
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static void uhttp_server_close_fds(struct client *cl)
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{
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// printf("uhttp_server_close_fds(%p)... client id: %d\n", cl, cl->id);
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}
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/*! ----------------------------------------------------------------------------
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* @fn get_instance
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*
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* @brief singleton to return the instance of UhttpServer.
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*/
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UhttpServer &UhttpServer::get_instance(void)
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{
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static UhttpServer m_ptr;
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return m_ptr;
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}
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/*! ----------------------------------------------------------------------------
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* @fn UhttpServer
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*
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* @brief Constructor of the Uhttp Server
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*/
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UhttpServer::UhttpServer(void) : m_ctx(NULL),
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m_ops(NULL)
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{
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}
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/*! ----------------------------------------------------------------------------
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* @fn ~UhttpServer
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*
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* @brief Destructor of the Uhttp Server
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*/
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UhttpServer::~UhttpServer(void)
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{
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ConnectionIterator the_cnx_it;
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m_controllers.clear();
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for (the_cnx_it = m_connections.begin(); the_cnx_it != m_connections.end(); ++the_cnx_it)
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{
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delete the_cnx_it->second;
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}
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ubus_free(m_ctx);
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}
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/*! ----------------------------------------------------------------------------
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* @fn setup
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*
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* @brief setup the http server.
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*/
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int UhttpServer::setup(struct ubus_context *a_ctx, const struct uhttpd_ops *an_ops, const char *a_config_dir_path)
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{
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m_ctx = a_ctx;
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m_ops = const_cast<struct uhttpd_ops *>(an_ops);
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return load_config_dir(a_config_dir_path);
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}
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/*! ----------------------------------------------------------------------------
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* @fn get_context
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*
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* @brief return the ubus context.
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*/
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struct ubus_context *UhttpServer::get_context(void)
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{
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return m_ctx;
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}
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/*! ----------------------------------------------------------------------------
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* @fn check_url
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*
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* @brief check if the url is managed by this plugin.
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*/
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bool UhttpServer::check_url(const std::string &an_url)
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{
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ControllerIterator the_it;
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printf("UhttpServer::check_url: %s\n", an_url.c_str());
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for (the_it = m_controllers.begin(); the_it != m_controllers.end(); ++the_it)
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{
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if ( the_it->second.get()->find(0, an_url))
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{
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return true;
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}
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}
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return false;
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}
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/*! ----------------------------------------------------------------------------
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* @fn handle_request
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*
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* @brief Handle the Request.
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*/
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void UhttpServer::handle_request(struct client *a_cl, const std::string &an_url, struct path_info *a_pi)
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{
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std::string the_url, the_parameters;
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std::size_t the_pos;
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WebController *the_controller;
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printf("uhttp_server_handle_request : url: <%s> client: %p\n", an_url.c_str(), a_cl);
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// Check if parameters are present on the url.
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the_pos = an_url.find_first_of("?", 0);
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if (the_pos != std::string::npos)
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{
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// parameters are present.
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the_url = an_url.substr(0, the_pos);
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the_parameters = an_url.substr(the_pos + 1);
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// printf("url: <%s> | parameters: <%s>\n", the_url.c_str(), the_parameters.c_str());
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}
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else
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{
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the_url = an_url;
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}
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the_controller = get_controller(a_cl->request.method, the_url);
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if (the_controller == NULL)
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{
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printf ("not found :( \n");
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std::string the_msg;
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the_msg = fmt::format(kJsonControlerNotFound, the_url);
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send_error(a_cl, 404, "Not Found", the_msg);
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return;
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}
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#warning TODO check if controller is available for this method.
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// We found the controller.
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// printf("method: %d\n", a_cl->request.method);
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struct dispatch *d = &a_cl->dispatch;
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switch (a_cl->request.method)
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{
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case UH_HTTP_MSG_GET:
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case UH_HTTP_MSG_PUT:
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case UH_HTTP_MSG_POST:
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case UH_HTTP_MSG_DELETE:
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d->data_send = uhttp_server_data_send;
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d->data_done = uhttp_server_data_done;
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d->close_fds = uhttp_server_close_fds;
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d->free = uhttp_server_request_free;
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m_connections[a_cl->id] = the_controller->new_connection(m_ops, a_cl, the_parameters);
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break;
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case UH_HTTP_MSG_OPTIONS:
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{
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HttpHeader the_http_header;
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the_http_header.send_option(m_ops, a_cl, 200);
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}
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break;
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default:
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printf("Invalid Request\n");
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send_error(a_cl, 400, "Bad Request", "Invalid Request");
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}
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printf("uhttp_server_handle_request -done.\n");
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}
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/*! ----------------------------------------------------------------------------
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* @fn invoke_request
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*
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* @brief This method to invoke the request.
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*/
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void UhttpServer::invoke_request(struct client *a_client)
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{
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uh_client_ref(a_client);
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// printf("UhttpServer::invoke_request\n");
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m_connections[a_client->id]->invoke(m_ctx);
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uh_client_unref(a_client);
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}
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/*! ----------------------------------------------------------------------------
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* @fn request_free
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*
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* @brief This method free the complete request.
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*/
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void UhttpServer::request_free(struct client *a_client)
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{
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ConnectionIterator the_it;
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// printf("UhttpServer::request_free id:%d nb connection: %ld\n", a_client->id, m_connections.size());
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uh_client_ref(a_client);
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the_it = m_connections.find(a_client->id);
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if (the_it != m_connections.end())
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{
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if ((the_it->second)->should_be_removed())
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{
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delete the_it->second;
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m_connections.erase(the_it);
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}
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}
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uh_client_unref(a_client);
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// printf("UhttpServer::request_free-done\n");
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}
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/*! ----------------------------------------------------------------------------
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* @fn data_send
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*
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* @brief This method called when data arrived from the client.
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*/
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int UhttpServer::data_send(struct client *a_client, const char *a_data, int a_len)
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{
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return m_connections[a_client->id]->add_data(a_data, a_len);
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}
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/*! ----------------------------------------------------------------------------
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* @fn load_config_dir
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*
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* @brief Load config from the configuration directory
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*/
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int UhttpServer::load_config_dir(const char *a_config_dir_path)
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{
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DIR *the_rep = NULL;
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struct dirent *the_dir_ent = NULL;
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std::string the_path;
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struct json_object *the_root_node;
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the_rep = opendir(a_config_dir_path);
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if (the_rep == NULL) {
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fprintf (stderr, "Impossible to open the config directory (%s).\n", a_config_dir_path);
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return -1;
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}
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while ((the_dir_ent = readdir(the_rep)) != NULL)
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{
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if (strcmp(the_dir_ent->d_name, ".") != 0 && strcmp(the_dir_ent->d_name, "..") != 0)
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{
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// printf ("load: %s\n", the_dir_ent->d_name);
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the_path = a_config_dir_path;
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the_path += the_dir_ent->d_name;
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the_root_node = load(the_path);
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if (the_root_node == NULL)
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{
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fprintf(stderr, "Failed to load controller configuration file (%s).\n", the_path.c_str());
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return -1;
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}
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add_controller_from_json(the_root_node);
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json_object_put(the_root_node);
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}
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}
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closedir(the_rep);
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return 0;
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}
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/*! ----------------------------------------------------------------------------
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* @fn add_controller_from_json
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*
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* @brief Load config from the configuration directory
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*/
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int UhttpServer::add_controller_from_json(struct json_object *a_root_node)
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{
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struct json_object *the_ctr_array_node, *the_ctrl_node, *the_note_array_node, *the_etag_ctrl_array_node;
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std::string the_path, the_model_name, the_event_name, the_etag_key, the_get_method, the_set_method;
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bool the_raw_response = false;
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int the_len;
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int i;
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if (json_object_object_get_ex(a_root_node, kResourcesKey, &the_ctr_array_node))
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{
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RestController *the_rest_controller;
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the_len = json_object_array_length(the_ctr_array_node);
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for (i = 0; i < the_len; i++)
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{
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the_ctrl_node = json_object_array_get_idx(the_ctr_array_node, i);
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the_rest_controller = new RestController;
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if (the_rest_controller->from_json(the_ctrl_node))
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{
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//new RestController(the_model_name, the_get_method, the_set_method, kDefaultTimeout, the_raw_response)
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add_controller(the_rest_controller->get_endpoint(), the_rest_controller);
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}
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}
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}
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if (json_object_object_get_ex(a_root_node, kEtagControllerKey, &the_etag_ctrl_array_node))
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{
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the_len = json_object_array_length(the_etag_ctrl_array_node);
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for (i = 0; i < the_len; i++)
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{
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the_ctrl_node = json_object_array_get_idx(the_etag_ctrl_array_node, i);
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if (get_controller_fields(the_ctrl_node, the_path, the_model_name, the_event_name, the_etag_key, the_get_method, the_set_method, the_raw_response))
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{
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EtagRestController *the_etag_rest_controller;
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the_etag_rest_controller = new EtagRestController(the_model_name, the_event_name, the_etag_key, the_get_method, the_set_method, kDefaultTimeout, the_raw_response);
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add_controller(the_path, the_etag_rest_controller);
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}
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}
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}
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if (json_object_object_get_ex(a_root_node, kNotificationKey, &the_note_array_node))
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{
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the_len = json_object_array_length(the_note_array_node);
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for (i = 0; i < the_len; i++)
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{
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the_ctrl_node = json_object_array_get_idx(the_note_array_node, i);
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if (get_controller_fields(the_ctrl_node, the_path, the_model_name, the_event_name, the_etag_key, the_get_method, the_set_method, the_raw_response))
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{
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NotificationController *the_notification_controller;
|
|
the_notification_controller = new NotificationController(the_event_name);
|
|
add_controller(the_path, the_notification_controller);
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*! ----------------------------------------------------------------------------
|
|
* @fn get_controller_fields
|
|
*
|
|
* @brief This method extract the controller fields from a json node.
|
|
*/
|
|
bool UhttpServer::get_controller_fields(struct json_object *a_node, std::string &a_path, std::string &a_model_name,
|
|
std::string &an_event_name, std::string &an_etag_key,
|
|
std::string &a_get_method, std::string &a_set_method, bool &a_raw_response)
|
|
{
|
|
bool the_result = false;
|
|
|
|
struct json_object *the_path_node, *the_ubus_model_node, *the_ubus_event_node, *the_get_method_node, *the_etag_key_node;
|
|
struct json_object *the_set_method_node, *the_raw_response_node;
|
|
|
|
// path
|
|
if (json_object_object_get_ex(a_node, kControllerPathKey, &the_path_node))
|
|
{
|
|
a_path = json_object_get_string(the_path_node);
|
|
the_result = true;
|
|
}
|
|
else
|
|
{
|
|
a_path.clear();
|
|
}
|
|
// model_name
|
|
if (json_object_object_get_ex(a_node, kControllerModelNameKey, &the_ubus_model_node))
|
|
{
|
|
a_model_name = json_object_get_string(the_ubus_model_node);
|
|
}
|
|
else
|
|
{
|
|
a_model_name.clear();
|
|
}
|
|
// event name
|
|
if (json_object_object_get_ex(a_node, kControllerEventNameKey, &the_ubus_event_node))
|
|
{
|
|
an_event_name = json_object_get_string(the_ubus_event_node);
|
|
}
|
|
else
|
|
{
|
|
an_event_name.clear();
|
|
}
|
|
// etag key
|
|
if (json_object_object_get_ex(a_node, kControllerEtagKey, &the_etag_key_node))
|
|
{
|
|
an_etag_key = json_object_get_string(the_etag_key_node);
|
|
}
|
|
else
|
|
{
|
|
an_etag_key.clear();
|
|
}
|
|
// get_method
|
|
if (json_object_object_get_ex(a_node, kControllerGetMethodKey, &the_get_method_node))
|
|
{
|
|
a_get_method = json_object_get_string(the_get_method_node);
|
|
}
|
|
else
|
|
{
|
|
a_get_method = kdefaultGetMethod;
|
|
}
|
|
// set_method
|
|
if (json_object_object_get_ex(a_node, kControllerSetMethodKey, &the_set_method_node))
|
|
{
|
|
a_set_method = json_object_get_string(the_set_method_node);
|
|
}
|
|
else
|
|
{
|
|
a_set_method = kdefaultSetMethod;
|
|
}
|
|
// raw_response
|
|
if (json_object_object_get_ex(a_node, kControllerRawResponseKey, &the_raw_response_node))
|
|
{
|
|
a_raw_response = json_object_get_boolean(the_raw_response_node);
|
|
}
|
|
else
|
|
{
|
|
a_raw_response = false;
|
|
}
|
|
|
|
return the_result;
|
|
}
|
|
|
|
/*! ----------------------------------------------------------------------------
|
|
* @fn load
|
|
*
|
|
* @brief This method load the restd controllers and file it into a json object.
|
|
* return null otherwise.
|
|
*/
|
|
struct json_object *UhttpServer::load(const std::string &a_file)
|
|
{
|
|
struct json_object *the_root_node = NULL;
|
|
struct stat the_stat;
|
|
int the_fd;
|
|
char *the_addr;
|
|
|
|
the_fd = open(a_file.c_str(), O_RDONLY);
|
|
if (the_fd == -1)
|
|
{
|
|
perror("open");
|
|
return NULL;
|
|
}
|
|
if (fstat(the_fd, &the_stat) == -1)
|
|
{
|
|
perror("fstat");
|
|
close(the_fd);
|
|
return NULL;
|
|
}
|
|
|
|
the_addr = (char *)mmap(NULL, the_stat.st_size, PROT_READ, MAP_PRIVATE, the_fd, 0);
|
|
if (the_addr == MAP_FAILED)
|
|
{
|
|
perror("mmap");
|
|
close(the_fd);
|
|
return NULL;
|
|
}
|
|
|
|
the_root_node = json_tokener_parse(the_addr);
|
|
|
|
close(the_fd);
|
|
|
|
return the_root_node;
|
|
}
|
|
|
|
/*! ----------------------------------------------------------------------------
|
|
* @fn add_rest_controller
|
|
*
|
|
* @brief add a rest controller.
|
|
*/
|
|
int UhttpServer::add_controller(const std::string &an_uri, WebController *a_controller)
|
|
{
|
|
std::string the_path;
|
|
std::size_t the_pos;
|
|
|
|
if (a_controller == NULL)
|
|
return -1;
|
|
|
|
a_controller->set_name(an_uri);
|
|
m_controllers[an_uri] = std::unique_ptr<WebController>(a_controller);
|
|
|
|
//m_controller_array[an_uri] = a_controller;
|
|
|
|
#if 0
|
|
printf("add: an_uri:%s\n", an_uri.c_str());
|
|
|
|
// Keep a list of the API root. to check if a controller is managed by this plugin or not.
|
|
the_pos = an_uri.find_first_of("/", 1);
|
|
if (the_pos != std::string::npos)
|
|
{
|
|
the_path = an_uri.substr(0, the_pos + 1);
|
|
if (std::find(m_path_list.begin(), m_path_list.end(), the_path) == m_path_list.end())
|
|
{
|
|
// uniq version. we add it.
|
|
m_path_list.push_back(the_path);
|
|
}
|
|
}
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
/*! ----------------------------------------------------------------------------
|
|
* @fn send_error
|
|
*
|
|
* @brief Send an error message to the client.
|
|
*/
|
|
WebController *UhttpServer::get_controller(uint8_t a_method, const std::string &an_url)
|
|
{
|
|
ControllerIterator the_it;
|
|
WebController *the_controller = NULL;
|
|
|
|
for (the_it = m_controllers.begin(); the_it != m_controllers.end(); ++the_it)
|
|
{
|
|
if (the_it->second.get()->find(a_method, an_url))
|
|
{
|
|
printf ("return the controller.\n");
|
|
return the_it->second.get();
|
|
}
|
|
}
|
|
|
|
return the_controller;
|
|
}
|
|
|
|
/*! ----------------------------------------------------------------------------
|
|
* @fn send_error
|
|
*
|
|
* @brief Send an error message to the client.
|
|
*/
|
|
void UhttpServer::send_error(struct client *a_cl, int a_code, const char *a_summary, const std::string &a_msg)
|
|
{
|
|
m_ops->http_header(a_cl, a_code, a_summary);
|
|
ustream_printf(a_cl->us, "Content-Type: application/json\r\n\r\n");
|
|
|
|
m_ops->chunk_printf(a_cl, "%s", a_msg.c_str());
|
|
|
|
m_ops->request_done(a_cl);
|
|
}
|