chris
/
Weather_ESP


			
				
					
						
						
							
							/*
 * server.c
 *
 *  Created on: 21 Apr 2020
 *      Author: Chris
 */

#include "server.h"

static const char *TAG = "server";
char cur_value_str[255] = "No measurements yet!";

void server_set_values(int32_t temp_raw, uint32_t pressure_raw, uint32_t humidity_raw,
		int32_t temp2_raw, uint32_t pressure2_raw, uint32_t humidity2_raw)
{
	sprintf(cur_value_str, "<html><body><p>%d %d %d</p><p>%d %d %d</p></body></html>", temp_raw, pressure_raw, humidity_raw, temp2_raw, pressure2_raw, humidity2_raw);
}

static esp_err_t get_handler(httpd_req_t *req)
{
    char*  buf;
    size_t buf_len;

    /* Get header value string length and allocate memory for length + 1,
     * extra byte for null termination */
    buf_len = httpd_req_get_hdr_value_len(req, "Host") + 1;
    if (buf_len > 1) {
        buf = malloc(buf_len);
        /* Copy null terminated value string into buffer */
        if (httpd_req_get_hdr_value_str(req, "Host", buf, buf_len) == ESP_OK) {
            ESP_LOGI(TAG, "Found header => Host: %s", buf);
        }
        free(buf);
    }

//    buf_len = httpd_req_get_hdr_value_len(req, "Test-Header-2") + 1;
//    if (buf_len > 1) {
//        buf = malloc(buf_len);
//        if (httpd_req_get_hdr_value_str(req, "Test-Header-2", buf, buf_len) == ESP_OK) {
//            ESP_LOGI(TAG, "Found header => Test-Header-2: %s", buf);
//        }
//        free(buf);
//    }
//
//    buf_len = httpd_req_get_hdr_value_len(req, "Test-Header-1") + 1;
//    if (buf_len > 1) {
//        buf = malloc(buf_len);
//        if (httpd_req_get_hdr_value_str(req, "Test-Header-1", buf, buf_len) == ESP_OK) {
//            ESP_LOGI(TAG, "Found header => Test-Header-1: %s", buf);
//        }
//        free(buf);
//    }

//    /* Read URL query string length and allocate memory for length + 1,
//     * extra byte for null termination */
//    buf_len = httpd_req_get_url_query_len(req) + 1;
//    if (buf_len > 1) {
//        buf = malloc(buf_len);
//        if (httpd_req_get_url_query_str(req, buf, buf_len) == ESP_OK) {
//            ESP_LOGI(TAG, "Found URL query => %s", buf);
//            char param[32];
//            /* Get value of expected key from query string */
//            if (httpd_query_key_value(buf, "query1", param, sizeof(param)) == ESP_OK) {
//                ESP_LOGI(TAG, "Found URL query parameter => query1=%s", param);
//            }
//            if (httpd_query_key_value(buf, "query3", param, sizeof(param)) == ESP_OK) {
//                ESP_LOGI(TAG, "Found URL query parameter => query3=%s", param);
//            }
//            if (httpd_query_key_value(buf, "query2", param, sizeof(param)) == ESP_OK) {
//                ESP_LOGI(TAG, "Found URL query parameter => query2=%s", param);
//            }
//        }
//        free(buf);
//    }

    /* Set some custom headers */
//    httpd_resp_set_hdr(req, "Custom-Header-1", "Custom-Value-1");
//    httpd_resp_set_hdr(req, "Custom-Header-2", "Custom-Value-2");

    /* Send response with custom headers and body set as the
     * string passed in user context*/
    const char* resp_str = cur_value_str;
    httpd_resp_send(req, resp_str, strlen(resp_str));

    /* After sending the HTTP response the old HTTP request
     * headers are lost. Check if HTTP request headers can be read now. */
//    if (httpd_req_get_hdr_value_len(req, "Host") == 0) {
//        ESP_LOGI(TAG, "Request headers lost");
//    }
    return ESP_OK;
}

static httpd_uri_t uri = {
    .uri       = "/",
    .method    = HTTP_GET,
    .handler   = get_handler,
};

static httpd_handle_t start_webserver(void)
{
    httpd_handle_t server = NULL;
    httpd_config_t config = HTTPD_DEFAULT_CONFIG();

    // Start the httpd server
    ESP_LOGI(TAG, "Starting server on port: '%d'", config.server_port);
    if (httpd_start(&server, &config) == ESP_OK) {
        // Set URI handlers
        ESP_LOGI(TAG, "Registering URI handlers");
        httpd_register_uri_handler(server, &uri);
        return server;
    }

    ESP_LOGI(TAG, "Error starting server!");
    return NULL;
}

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

static void connect_handler(void* arg, esp_event_base_t event_base,
                            int32_t event_id, void* event_data)
{
    httpd_handle_t* server = (httpd_handle_t*) arg;
    if (*server == NULL) {
        ESP_LOGI(TAG, "Starting webserver");
        *server = start_webserver();
    }
}

static void disconnect_handler(void* arg, esp_event_base_t event_base,
                               int32_t event_id, void* event_data)
{
    httpd_handle_t* server = (httpd_handle_t*) arg;
    if (*server) {
        ESP_LOGI(TAG, "Stopping webserver");
        stop_webserver(*server);
        *server = NULL;
    }
}

void init_server()
{
	start_webserver();
}