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Ajurna
2023-03-27 08:20:06 +01:00
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/* Simple HTTP Server Example
This example code is in the Public Domain (or CC0 licensed, at your option.)
Unless required by applicable law or agreed to in writing, this
software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
CONDITIONS OF ANY KIND, either express or implied.
*/
#include <esp_wifi.h>
#include <esp_event.h>
#include <esp_log.h>
#include <esp_system.h>
#include <nvs_flash.h>
#include <sys/param.h>
#include "nvs_flash.h"
#include "esp_netif.h"
#include "esp_eth.h"
#include "protocol_examples_common.h"
#include "protocol_examples_utils.h"
#include "esp_tls_crypto.h"
#include <esp_http_server.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/queue.h"
#include "esp_log.h"
#include "driver/rmt_tx.h"
#include "driver/rmt_rx.h"
#include "ir_nec_encoder.h"
#define EXAMPLE_IR_RESOLUTION_HZ 1000000 // 1MHz resolution, 1 tick = 1us
#define EXAMPLE_IR_TX_GPIO_NUM 18
#define EXAMPLE_IR_RX_GPIO_NUM 19
#define EXAMPLE_IR_NEC_DECODE_MARGIN 200 // Tolerance for parsing RMT symbols into bit stream
/**
* @brief NEC timing spec
*/
#define NEC_LEADING_CODE_DURATION_0 9000
#define NEC_LEADING_CODE_DURATION_1 4500
#define NEC_PAYLOAD_ZERO_DURATION_0 560
#define NEC_PAYLOAD_ZERO_DURATION_1 560
#define NEC_PAYLOAD_ONE_DURATION_0 560
#define NEC_PAYLOAD_ONE_DURATION_1 1690
#define NEC_REPEAT_CODE_DURATION_0 9000
#define NEC_REPEAT_CODE_DURATION_1 2250
#define EXAMPLE_HTTP_QUERY_KEY_MAX_LEN (64)
rmt_tx_channel_config_t tx_channel_cfg = {
.clk_src = RMT_CLK_SRC_DEFAULT,
.resolution_hz = EXAMPLE_IR_RESOLUTION_HZ,
.mem_block_symbols = 64, // amount of RMT symbols that the channel can store at a time
.trans_queue_depth = 4, // number of transactions that allowed to pending in the background, this example won't queue multiple transactions, so queue depth > 1 is sufficient
.gpio_num = EXAMPLE_IR_TX_GPIO_NUM,
};
rmt_channel_handle_t tx_channel = NULL;
rmt_carrier_config_t carrier_cfg = {
.duty_cycle = 0.33,
.frequency_hz = 38000, // 38KHz
};
ir_nec_encoder_config_t nec_encoder_cfg = {
.resolution = EXAMPLE_IR_RESOLUTION_HZ,
};
rmt_encoder_handle_t nec_encoder = NULL;
rmt_transmit_config_t transmit_config = {
.loop_count = 0, // no loop
};
QueueHandle_t receive_queue = xQueueCreate(1, sizeof(rmt_rx_done_event_data_t));
rmt_rx_done_event_data_t rx_data;
static uint16_t s_nec_code_address;
static uint16_t s_nec_code_command;
/**
* @brief Check whether a duration is within expected range
*/
static inline bool nec_check_in_range(uint32_t signal_duration, uint32_t spec_duration)
{
return (signal_duration < (spec_duration + EXAMPLE_IR_NEC_DECODE_MARGIN)) &&
(signal_duration > (spec_duration - EXAMPLE_IR_NEC_DECODE_MARGIN));
}
/**
* @brief Check whether a RMT symbol represents NEC logic zero
*/
static bool nec_parse_logic0(rmt_symbol_word_t *rmt_nec_symbols)
{
return nec_check_in_range(rmt_nec_symbols->duration0, NEC_PAYLOAD_ZERO_DURATION_0) &&
nec_check_in_range(rmt_nec_symbols->duration1, NEC_PAYLOAD_ZERO_DURATION_1);
}
/**
* @brief Check whether a RMT symbol represents NEC logic one
*/
static bool nec_parse_logic1(rmt_symbol_word_t *rmt_nec_symbols)
{
return nec_check_in_range(rmt_nec_symbols->duration0, NEC_PAYLOAD_ONE_DURATION_0) &&
nec_check_in_range(rmt_nec_symbols->duration1, NEC_PAYLOAD_ONE_DURATION_1);
}
/**
* @brief Decode RMT symbols into NEC address and command
*/
static bool nec_parse_frame(rmt_symbol_word_t *rmt_nec_symbols)
{
rmt_symbol_word_t *cur = rmt_nec_symbols;
uint16_t address = 0;
uint16_t command = 0;
bool valid_leading_code = nec_check_in_range(cur->duration0, NEC_LEADING_CODE_DURATION_0) &&
nec_check_in_range(cur->duration1, NEC_LEADING_CODE_DURATION_1);
if (!valid_leading_code) {
return false;
}
cur++;
for (int i = 0; i < 16; i++) {
if (nec_parse_logic1(cur)) {
address |= 1 << i;
} else if (nec_parse_logic0(cur)) {
address &= ~(1 << i);
} else {
return false;
}
cur++;
}
for (int i = 0; i < 16; i++) {
if (nec_parse_logic1(cur)) {
command |= 1 << i;
} else if (nec_parse_logic0(cur)) {
command &= ~(1 << i);
} else {
return false;
}
cur++;
}
// save address and command
s_nec_code_address = address;
s_nec_code_command = command;
return true;
}
/**
* @brief Check whether the RMT symbols represent NEC repeat code
*/
static bool nec_parse_frame_repeat(rmt_symbol_word_t *rmt_nec_symbols)
{
return nec_check_in_range(rmt_nec_symbols->duration0, NEC_REPEAT_CODE_DURATION_0) &&
nec_check_in_range(rmt_nec_symbols->duration1, NEC_REPEAT_CODE_DURATION_1);
}
static void example_parse_nec_frame(rmt_symbol_word_t *rmt_nec_symbols, size_t symbol_num)
{
printf("NEC frame start---\r\n");
for (size_t i = 0; i < symbol_num; i++) {
printf("{%d:%d},{%d:%d}\r\n", rmt_nec_symbols[i].level0, rmt_nec_symbols[i].duration0,
rmt_nec_symbols[i].level1, rmt_nec_symbols[i].duration1);
}
printf("---NEC frame end: ");
// decode RMT symbols
switch (symbol_num) {
case 34: // NEC normal frame
if (nec_parse_frame(rmt_nec_symbols)) {
printf("Address=%04X, Command=%04X\r\n\r\n", s_nec_code_address, s_nec_code_command);
}
break;
case 2: // NEC repeat frame
if (nec_parse_frame_repeat(rmt_nec_symbols)) {
printf("Address=%04X, Command=%04X, repeat\r\n\r\n", s_nec_code_address, s_nec_code_command);
}
break;
default:
printf("Unknown NEC frame\r\n\r\n");
break;
}
}
/* A simple example that demonstrates how to create GET and POST
* handlers for the web server.
*/
static const char *TAG = "example";
#if CONFIG_EXAMPLE_BASIC_AUTH
typedef struct {
char *username;
char *password;
} basic_auth_info_t;
#define HTTPD_401 "401 UNAUTHORIZED" /*!< HTTP Response 401 */
static char *http_auth_basic(const char *username, const char *password)
{
int out;
char *user_info = NULL;
char *digest = NULL;
size_t n = 0;
asprintf(&user_info, "%s:%s", username, password);
if (!user_info) {
ESP_LOGE(TAG, "No enough memory for user information");
return NULL;
}
esp_crypto_base64_encode(NULL, 0, &n, (const unsigned char *)user_info, strlen(user_info));
/* 6: The length of the "Basic " string
* n: Number of bytes for a base64 encode format
* 1: Number of bytes for a reserved which be used to fill zero
*/
digest = calloc(1, 6 + n + 1);
if (digest) {
strcpy(digest, "Basic ");
esp_crypto_base64_encode((unsigned char *)digest + 6, n, (size_t *)&out, (const unsigned char *)user_info, strlen(user_info));
}
free(user_info);
return digest;
}
/* An HTTP GET handler */
static esp_err_t basic_auth_get_handler(httpd_req_t *req)
{
char *buf = NULL;
size_t buf_len = 0;
basic_auth_info_t *basic_auth_info = req->user_ctx;
buf_len = httpd_req_get_hdr_value_len(req, "Authorization") + 1;
if (buf_len > 1) {
buf = calloc(1, buf_len);
if (!buf) {
ESP_LOGE(TAG, "No enough memory for basic authorization");
return ESP_ERR_NO_MEM;
}
if (httpd_req_get_hdr_value_str(req, "Authorization", buf, buf_len) == ESP_OK) {
ESP_LOGI(TAG, "Found header => Authorization: %s", buf);
} else {
ESP_LOGE(TAG, "No auth value received");
}
char *auth_credentials = http_auth_basic(basic_auth_info->username, basic_auth_info->password);
if (!auth_credentials) {
ESP_LOGE(TAG, "No enough memory for basic authorization credentials");
free(buf);
return ESP_ERR_NO_MEM;
}
if (strncmp(auth_credentials, buf, buf_len)) {
ESP_LOGE(TAG, "Not authenticated");
httpd_resp_set_status(req, HTTPD_401);
httpd_resp_set_type(req, "application/json");
httpd_resp_set_hdr(req, "Connection", "keep-alive");
httpd_resp_set_hdr(req, "WWW-Authenticate", "Basic realm=\"Hello\"");
httpd_resp_send(req, NULL, 0);
} else {
ESP_LOGI(TAG, "Authenticated!");
char *basic_auth_resp = NULL;
httpd_resp_set_status(req, HTTPD_200);
httpd_resp_set_type(req, "application/json");
httpd_resp_set_hdr(req, "Connection", "keep-alive");
asprintf(&basic_auth_resp, "{\"authenticated\": true,\"user\": \"%s\"}", basic_auth_info->username);
if (!basic_auth_resp) {
ESP_LOGE(TAG, "No enough memory for basic authorization response");
free(auth_credentials);
free(buf);
return ESP_ERR_NO_MEM;
}
httpd_resp_send(req, basic_auth_resp, strlen(basic_auth_resp));
free(basic_auth_resp);
}
free(auth_credentials);
free(buf);
} else {
ESP_LOGE(TAG, "No auth header received");
httpd_resp_set_status(req, HTTPD_401);
httpd_resp_set_type(req, "application/json");
httpd_resp_set_hdr(req, "Connection", "keep-alive");
httpd_resp_set_hdr(req, "WWW-Authenticate", "Basic realm=\"Hello\"");
httpd_resp_send(req, NULL, 0);
}
return ESP_OK;
}
static httpd_uri_t basic_auth = {
.uri = "/basic_auth",
.method = HTTP_GET,
.handler = basic_auth_get_handler,
};
static void httpd_register_basic_auth(httpd_handle_t server)
{
basic_auth_info_t *basic_auth_info = calloc(1, sizeof(basic_auth_info_t));
if (basic_auth_info) {
basic_auth_info->username = CONFIG_EXAMPLE_BASIC_AUTH_USERNAME;
basic_auth_info->password = CONFIG_EXAMPLE_BASIC_AUTH_PASSWORD;
basic_auth.user_ctx = basic_auth_info;
httpd_register_uri_handler(server, &basic_auth);
}
}
#endif
/* An HTTP GET handler */
static esp_err_t hello_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[EXAMPLE_HTTP_QUERY_KEY_MAX_LEN], dec_param[EXAMPLE_HTTP_QUERY_KEY_MAX_LEN] = {0};
/* 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);
example_uri_decode(dec_param, param, strnlen(param, EXAMPLE_HTTP_QUERY_KEY_MAX_LEN));
ESP_LOGI(TAG, "Decoded query parameter => %s", dec_param);
}
if (httpd_query_key_value(buf, "query3", param, sizeof(param)) == ESP_OK) {
ESP_LOGI(TAG, "Found URL query parameter => query3=%s", param);
example_uri_decode(dec_param, param, strnlen(param, EXAMPLE_HTTP_QUERY_KEY_MAX_LEN));
ESP_LOGI(TAG, "Decoded query parameter => %s", dec_param);
}
if (httpd_query_key_value(buf, "query2", param, sizeof(param)) == ESP_OK) {
ESP_LOGI(TAG, "Found URL query parameter => query2=%s", param);
example_uri_decode(dec_param, param, strnlen(param, EXAMPLE_HTTP_QUERY_KEY_MAX_LEN));
ESP_LOGI(TAG, "Decoded query parameter => %s", dec_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 = (const char*) req->user_ctx;
httpd_resp_send(req, resp_str, HTTPD_RESP_USE_STRLEN);
/* 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 const httpd_uri_t hello = {
.uri = "/hello",
.method = HTTP_GET,
.handler = hello_get_handler,
/* Let's pass response string in user
* context to demonstrate it's usage */
.user_ctx = "Hello World!"
};
/* An HTTP POST handler */
static esp_err_t echo_post_handler(httpd_req_t *req)
{
char buf[100];
int ret, remaining = req->content_len;
while (remaining > 0) {
/* Read the data for the request */
if ((ret = httpd_req_recv(req, buf,
MIN(remaining, sizeof(buf)))) <= 0) {
if (ret == HTTPD_SOCK_ERR_TIMEOUT) {
/* Retry receiving if timeout occurred */
continue;
}
return ESP_FAIL;
}
/* Send back the same data */
httpd_resp_send_chunk(req, buf, ret);
remaining -= ret;
/* Log data received */
ESP_LOGI(TAG, "=========== RECEIVED DATA ==========");
ESP_LOGI(TAG, "%.*s", ret, buf);
ESP_LOGI(TAG, "====================================");
}
// End response
httpd_resp_send_chunk(req, NULL, 0);
return ESP_OK;
}
static const httpd_uri_t echo = {
.uri = "/echo",
.method = HTTP_POST,
.handler = echo_post_handler,
.user_ctx = NULL
};
static esp_err_t candle_on_handler(httpd_req_t *req)
{
const char* resp_str = "Turning Candle On!!!!";
ESP_LOGI(TAG, "Turning Candle On!!!!");
const ir_nec_scan_code_t scan_code = {
.address = 0xB708,
.command = 0xFF00,
};
ESP_ERROR_CHECK(rmt_transmit(tx_channel, nec_encoder, &scan_code, sizeof(scan_code), &transmit_config));
if (xQueueReceive(receive_queue, &rx_data, pdMS_TO_TICKS(1000)) == pdPASS) {
// parse the receive symbols and print the result
example_parse_nec_frame(rx_data.received_symbols, rx_data.num_symbols);
// start receive again
ESP_ERROR_CHECK(rmt_receive(rx_channel, raw_symbols, sizeof(raw_symbols), &receive_config));
}
httpd_resp_send(req, resp_str, HTTPD_RESP_USE_STRLEN);
return ESP_OK;
httpd_resp_send_chunk(req, NULL, 0);
}
static const httpd_uri_t candle_on = {
.uri = "/candle_on",
.method = HTTP_GET,
.handler = candle_on_handler,
.user_ctx = NULL
};
/* This handler allows the custom error handling functionality to be
* tested from client side. For that, when a PUT request 0 is sent to
* URI /ctrl, the /hello and /echo URIs are unregistered and following
* custom error handler http_404_error_handler() is registered.
* Afterwards, when /hello or /echo is requested, this custom error
* handler is invoked which, after sending an error message to client,
* either closes the underlying socket (when requested URI is /echo)
* or keeps it open (when requested URI is /hello). This allows the
* client to infer if the custom error handler is functioning as expected
* by observing the socket state.
*/
esp_err_t http_404_error_handler(httpd_req_t *req, httpd_err_code_t err)
{
if (strcmp("/hello", req->uri) == 0) {
httpd_resp_send_err(req, HTTPD_404_NOT_FOUND, "/hello URI is not available");
/* Return ESP_OK to keep underlying socket open */
return ESP_OK;
} else if (strcmp("/echo", req->uri) == 0) {
httpd_resp_send_err(req, HTTPD_404_NOT_FOUND, "/echo URI is not available");
/* Return ESP_FAIL to close underlying socket */
return ESP_FAIL;
}
/* For any other URI send 404 and close socket */
httpd_resp_send_err(req, HTTPD_404_NOT_FOUND, "Some 404 error message");
return ESP_FAIL;
}
static httpd_handle_t start_webserver(void)
{
httpd_handle_t server = NULL;
httpd_config_t config = HTTPD_DEFAULT_CONFIG();
config.lru_purge_enable = true;
// 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, &hello);
httpd_register_uri_handler(server, &echo);
httpd_register_uri_handler(server, &candle_on);
#if CONFIG_EXAMPLE_BASIC_AUTH
httpd_register_basic_auth(server);
#endif
return server;
}
ESP_LOGI(TAG, "Error starting server!");
return NULL;
}
static esp_err_t stop_webserver(httpd_handle_t server)
{
// Stop the httpd server
return httpd_stop(server);
}
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");
if (stop_webserver(*server) == ESP_OK) {
*server = NULL;
} else {
ESP_LOGE(TAG, "Failed to stop http 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();
}
}
void app_main(void)
{
static httpd_handle_t server = NULL;
ESP_ERROR_CHECK(nvs_flash_init());
ESP_ERROR_CHECK(esp_netif_init());
ESP_ERROR_CHECK(esp_event_loop_create_default());
/* This helper function configures Wi-Fi or Ethernet, as selected in menuconfig.
* Read "Establishing Wi-Fi or Ethernet Connection" section in
* examples/protocols/README.md for more information about this function.
*/
ESP_ERROR_CHECK(example_connect());
/* Register event handlers to stop the server when Wi-Fi or Ethernet is disconnected,
* and re-start it upon connection.
*/
#ifdef CONFIG_EXAMPLE_CONNECT_WIFI
ESP_ERROR_CHECK(esp_event_handler_register(IP_EVENT, IP_EVENT_STA_GOT_IP, &connect_handler, &server));
ESP_ERROR_CHECK(esp_event_handler_register(WIFI_EVENT, WIFI_EVENT_STA_DISCONNECTED, &disconnect_handler, &server));
#endif // CONFIG_EXAMPLE_CONNECT_WIFI
#ifdef CONFIG_EXAMPLE_CONNECT_ETHERNET
ESP_ERROR_CHECK(esp_event_handler_register(IP_EVENT, IP_EVENT_ETH_GOT_IP, &connect_handler, &server));
ESP_ERROR_CHECK(esp_event_handler_register(ETH_EVENT, ETHERNET_EVENT_DISCONNECTED, &disconnect_handler, &server));
#endif // CONFIG_EXAMPLE_CONNECT_ETHERNET
ESP_LOGI(TAG, "create RMT TX channel");
ESP_ERROR_CHECK(rmt_new_ir_nec_encoder(&nec_encoder_cfg, &nec_encoder));
ESP_ERROR_CHECK(rmt_new_tx_channel(&tx_channel_cfg, &tx_channel));
ESP_ERROR_CHECK(rmt_apply_carrier(tx_channel, &carrier_cfg));
ESP_ERROR_CHECK(rmt_enable(tx_channel));
/* Start the server for the first time */
server = start_webserver();
}