gistfile1.txt

#include <Arduino.h>
#include "WiFi.h"
// #include <WebServer.h>
#include <ArduinoJson.h>
#include <StreamUtils.h>

#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_eth.h"
#include <esp_http_server.h>

const char *ssid = "**";
const char *password = "**";

// WebServer server(80);
static httpd_handle_t idfServer = NULL;

void largeJson();
const int exampleCount = 90;

const size_t capacity = 11 * JSON_ARRAY_SIZE(1) + 10 * JSON_OBJECT_SIZE(0) + JSON_OBJECT_SIZE(1) + 2 * JSON_OBJECT_SIZE(2) + JSON_OBJECT_SIZE(4) + JSON_OBJECT_SIZE(5) + JSON_OBJECT_SIZE(8) + JSON_OBJECT_SIZE(13) + 310;
DynamicJsonDocument example(capacity);
const char *json = "{\"ieeeAddr\":\"000D6F001336867C\",\"last_seen\":\"1581928963\",\"type\":\"Router\",\"powerSource\":\"Main\",\"Interview\":{\"TS\":0,\"State\":4},\"ep\":{\"1\":{\"profId\":260,\"In\":{\"0\":[{}],\"1\":[{}],\"3\":[{}],\"4\":[{}],\"9\":[{}],\"1280\":[{}],\"1282\":[{}],\"65530\":[{}]},\"Out\":{\"3\":[{}],\"25\":[{}]},\"devId\":1027}},\"ManufName\":\"GS\",\"ModelId\":\"SRHMP-I1\",\"st\":{\"linkquality\":76,\"trSeqNum\":24,\"warning\":\"\",\"battery\":100,\"voltage\":4.1},\"supported\":1,\"friendly_name\":\"sirena\",\"Rcf\":true,\"Rtg\":[\"35282\"]}";
DynamicJsonDocument doc(capacity *exampleCount + exampleCount * 3);

class CustomWriter : public Stream
{
public:
  CustomWriter(httpd_req_t *req)
  {
    _req = req;
  }

  size_t write(uint8_t c)
  {
    httpd_resp_send_chunk(_req, (const char *)c, (ssize_t)1);
    // httpd_resp_send_chunk(_req, (const char *)"c", 1);
    return 1;
  }

  size_t write(const uint8_t *s, size_t n)
  {
    httpd_resp_send_chunk(_req, (const char *)s, n);
    // httpd_resp_send_chunk(_req, (const char *)"test", 4); httpd_resp_send

    return n;
  }
  int available()
  {
    return 1;
  }
  void clear()
  {
  }
  int read()
  {
    return 0;
  }
  int peek()
  {
    return 0;
  }
  void flush()
  {
    httpd_resp_send_chunk(_req, NULL, 0);
  }

private:
  httpd_req_t *_req;
};

/* An HTTP GET handler */
static esp_err_t large_get_handler(httpd_req_t *req)
{
  CustomWriter writer(req);
  WriteBufferingStream bufferedWifiClient{writer, 1024};
  serializeJson(doc, bufferedWifiClient);
  bufferedWifiClient.flush();

  return ESP_OK;
}

static const httpd_uri_t large_uri = {
    .uri = "/large",
    .method = HTTP_GET,
    .handler = large_get_handler,
    .user_ctx = NULL};

static httpd_handle_t start_webserver(void)
{
  httpd_handle_t server = NULL;
  httpd_config_t config = HTTPD_DEFAULT_CONFIG();
  config.server_port = 81;

  // 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, &large_uri);

    return server;
  }

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

void setup()
{
  Serial.begin(115200);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED)
  {
    delay(500);
    Serial.println("Connecting to WiFi..");
  }
  Serial.println("Connected to the WiFi network");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());

  // server.begin();
  // server.on("/large", largeJson);
  deserializeJson(example, json);
  for (int i = 0; i < exampleCount; i++)
  {
    String key = "key" + String(i);
    doc[key] = example;
  }

  idfServer = start_webserver();
}

void loop()
{
  // server.handleClient();
}

// void largeJson()
// {
//   WiFiClient client = server.client();
//   WriteBufferingStream bufferedWifiClient{client, 1024};
//   serializeJson(doc, bufferedWifiClient);
//   bufferedWifiClient.flush();
//   client.flush();
//   client.stop();
//   Serial.println("done");
// }