squeezelite-esp32/components/wifi-manager/wifi_manager_http_server.c

/*
 *  Squeezelite for esp32
 *
 *  (c) Sebastien 2019
 *      Philippe G. 2019, philippe_44@outlook.com
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#include "http_server_handlers.h"
#include "esp_log.h"
#include "esp_http_server.h"
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include "esp_system.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "messaging.h"
#include "platform_esp32.h"
static const char TAG[] = "http_server";

static httpd_handle_t _server = NULL;
rest_server_context_t *rest_context = NULL;
RingbufHandle_t messaging=NULL;

void register_common_handlers(httpd_handle_t server){
	httpd_uri_t css_get = { .uri = "/css/*", .method = HTTP_GET, .handler = resource_filehandler, .user_ctx = rest_context };
	httpd_register_uri_handler(server, &css_get);
	httpd_uri_t js_get = { .uri = "/js/*", .method = HTTP_GET, .handler = resource_filehandler, .user_ctx = rest_context };
	httpd_register_uri_handler(server, &js_get);
	httpd_uri_t icon_get = { .uri = "/icons*", .method = HTTP_GET, .handler = resource_filehandler, .user_ctx = rest_context };
	httpd_register_uri_handler(server, &icon_get);	
	httpd_uri_t png_get = { .uri = "/favicon*", .method = HTTP_GET, .handler = resource_filehandler, .user_ctx = rest_context };
	httpd_register_uri_handler(server, &png_get);	

}
void register_regular_handlers(httpd_handle_t server){
	httpd_uri_t root_get = { .uri = "/", .method = HTTP_GET, .handler = root_get_handler, .user_ctx = rest_context };
	httpd_register_uri_handler(server, &root_get);

	httpd_uri_t ap_get = { .uri = "/ap.json", .method = HTTP_GET, .handler = ap_get_handler, .user_ctx = rest_context };
	httpd_register_uri_handler(server, &ap_get);
	httpd_uri_t scan_get = { .uri = "/scan.json", .method = HTTP_GET, .handler = ap_scan_handler, .user_ctx = rest_context };
	httpd_register_uri_handler(server, &scan_get);
	httpd_uri_t config_get = { .uri = "/config.json", .method = HTTP_GET, .handler = config_get_handler, .user_ctx = rest_context };
	httpd_register_uri_handler(server, &config_get);
	httpd_uri_t status_get = { .uri = "/status.json", .method = HTTP_GET, .handler = status_get_handler, .user_ctx = rest_context };
	httpd_register_uri_handler(server, &status_get);
	httpd_uri_t messages_get = { .uri = "/messages.json", .method = HTTP_GET, .handler = messages_get_handler, .user_ctx = rest_context };
	httpd_register_uri_handler(server, &messages_get);

	httpd_uri_t commands_get = { .uri = "/commands.json", .method = HTTP_GET, .handler = console_cmd_get_handler, .user_ctx = rest_context };
	httpd_register_uri_handler(server, &commands_get);
	httpd_uri_t commands_post = { .uri = "/commands.json", .method = HTTP_POST, .handler = console_cmd_post_handler, .user_ctx = rest_context };
	httpd_register_uri_handler(server, &commands_post);

	httpd_uri_t config_post = { .uri = "/config.json", .method = HTTP_POST, .handler = config_post_handler, .user_ctx = rest_context };
	httpd_register_uri_handler(server, &config_post);
	httpd_uri_t connect_post = { .uri = "/connect.json", .method = HTTP_POST, .handler = connect_post_handler, .user_ctx = rest_context };
	httpd_register_uri_handler(server, &connect_post);

	httpd_uri_t reboot_ota_post = { .uri = "/reboot_ota.json", .method = HTTP_POST, .handler = reboot_ota_post_handler, .user_ctx = rest_context };
	httpd_register_uri_handler(server, &reboot_ota_post);

	httpd_uri_t reboot_post = { .uri = "/reboot.json", .method = HTTP_POST, .handler = reboot_post_handler, .user_ctx = rest_context };
	httpd_register_uri_handler(server, &reboot_post);

	httpd_uri_t recovery_post = { .uri = "/recovery.json", .method = HTTP_POST, .handler = recovery_post_handler, .user_ctx = rest_context };
	httpd_register_uri_handler(server, &recovery_post);

	httpd_uri_t connect_delete = { .uri = "/connect.json", .method = HTTP_DELETE, .handler = connect_delete_handler, .user_ctx = rest_context };
	httpd_register_uri_handler(server, &connect_delete);

	if(is_recovery_running){
		httpd_uri_t flash_post = { .uri = "/flash.json", .method = HTTP_POST, .handler = flash_post_handler, .user_ctx = rest_context };
		httpd_register_uri_handler(server, &flash_post);
	}
	// from https://github.com/tripflex/wifi-captive-portal/blob/master/src/mgos_wifi_captive_portal.c
	// https://unix.stackexchange.com/questions/432190/why-isnt-androids-captive-portal-detection-triggering-a-browser-window
	 // Known HTTP GET requests to check for Captive Portal

	///kindle-wifi/wifiredirect.html Kindle when requested with com.android.captiveportallogin
	///kindle-wifi/wifistub.html Kindle before requesting with captive portal login window (maybe for detection?)


	httpd_uri_t connect_redirect_1 = { .uri = "/mobile/status.php", .method = HTTP_GET, .handler = redirect_200_ev_handler, .user_ctx = rest_context };// Android 8.0 (Samsung s9+)
	httpd_register_uri_handler(server, &connect_redirect_1);
	httpd_uri_t connect_redirect_2 = { .uri = "/generate_204", .method = HTTP_GET, .handler = redirect_200_ev_handler, .user_ctx = rest_context };// Android
	httpd_register_uri_handler(server, &connect_redirect_2);
	httpd_uri_t connect_redirect_3 = { .uri = "/gen_204", .method = HTTP_GET, .handler = redirect_ev_handler, .user_ctx = rest_context };// Android 9.0
	httpd_register_uri_handler(server, &connect_redirect_3);
//	httpd_uri_t connect_redirect_4 = { .uri = "/ncsi.txt", .method = HTTP_GET, .handler = redirect_ev_handler, .user_ctx = rest_context };// Windows
//	httpd_register_uri_handler(server, &connect_redirect_4);
	httpd_uri_t connect_redirect_5 = { .uri = "/hotspot-detect.html", .method = HTTP_GET, .handler = redirect_ev_handler, .user_ctx = rest_context }; // iOS 8/9
	httpd_register_uri_handler(server, &connect_redirect_5);
	httpd_uri_t connect_redirect_6 = { .uri = "/library/test/success.html", .method = HTTP_GET, .handler = redirect_ev_handler, .user_ctx = rest_context };// iOS 8/9
	httpd_register_uri_handler(server, &connect_redirect_6);
	httpd_uri_t connect_redirect_7 = { .uri = "/hotspotdetect.html", .method = HTTP_GET, .handler = redirect_ev_handler, .user_ctx = rest_context }; // iOS
	httpd_register_uri_handler(server, &connect_redirect_7);
	httpd_uri_t connect_redirect_8 = { .uri = "/success.txt", .method = HTTP_GET, .handler = redirect_ev_handler, .user_ctx = rest_context }; // OSX
	httpd_register_uri_handler(server, &connect_redirect_8);



	ESP_LOGD(TAG,"Registering default error handler for 404");
	httpd_register_err_handler(server, HTTPD_404_NOT_FOUND,&err_handler);

}


esp_err_t http_server_start()
{
	ESP_LOGI(TAG, "Initializing HTTP Server");
	messaging = messaging_register_subscriber(10, "http_server");
    rest_context = calloc(1, sizeof(rest_server_context_t));
    if(rest_context==NULL){
    	ESP_LOGE(TAG,"No memory for http context");
    	return ESP_FAIL;
    }
    strlcpy(rest_context->base_path, "/res/", sizeof(rest_context->base_path));

    httpd_config_t config = HTTPD_DEFAULT_CONFIG();
    config.max_uri_handlers = 25;
    config.max_open_sockets = 3;
	config.lru_purge_enable = true;
	config.backlog_conn = 1;
    config.uri_match_fn = httpd_uri_match_wildcard;
	config.task_priority = ESP_TASK_PRIO_MIN;
    //todo:  use the endpoint below to configure session token?
    // config.open_fn

    ESP_LOGD(TAG, "Starting HTTP Server");
    esp_err_t err= httpd_start(&_server, &config);
    if(err != ESP_OK){
    	ESP_LOGE_LOC(TAG,"Start server failed");
    }
    else {

    	register_common_handlers(_server);
    	register_regular_handlers(_server);
    }

    return err;
}


/* Function to free context */
void adder_free_func(void *ctx)
{
    ESP_LOGD(TAG, "/adder Free Context function called");
    free(ctx);
}


void stop_webserver(httpd_handle_t server)
{
    // Stop the httpd server
    httpd_stop(server);
}