PoC wired mode over UVC, add logs over websockets, needs cleanup

components/WebSocketLogger/CMakeLists.txt

@@ -0,0 +1,4 @@
+idf_component_register(SRCS "WebSocketLogger/WebSocketLogger.cpp"
+  INCLUDE_DIRS "WebSocketLogger"
+  REQUIRES esp_http_server
+)

components/WebSocketLogger/WebSocketLogger/WebSocketLogger.cpp

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+#include "WebSocketLogger.hpp"
+
+WebSocketLogger::WebSocketLogger()
+{
+  this->connected_socket_client = async_resp_arg{
+      .hd = nullptr,
+      .fd = -1,
+  };
+
+  this->ws_log_buffer[0] = '\0';
+}
+
+void LoggerHelpers::ws_async_send(void *arg)
+{
+  char *log_buffer = webSocketLogger.get_websocket_log_buffer();
+
+  struct async_resp_arg *resp_arg = (struct async_resp_arg *)arg;
+  httpd_handle_t hd = resp_arg->hd;
+  int fd = resp_arg->fd;
+
+  httpd_ws_frame_t websocket_packet = httpd_ws_frame_t{};
+
+  websocket_packet.payload = (uint8_t *)log_buffer;
+  websocket_packet.len = strlen(log_buffer);
+  websocket_packet.type = HTTPD_WS_TYPE_TEXT;
+
+  httpd_ws_send_frame_async(hd, fd, &websocket_packet);
+}
+
+esp_err_t WebSocketLogger::log_message(const char *format, va_list args)
+{
+  vsnprintf(this->ws_log_buffer, 100, format, args);
+
+  if (connected_socket_client.fd == -1 || connected_socket_client.hd == nullptr)
+  {
+    return ESP_FAIL;
+  }
+
+  esp_err_t ret = httpd_queue_work(connected_socket_client.hd, LoggerHelpers::ws_async_send, &connected_socket_client);
+  if (ret != ESP_OK)
+  {
+    connected_socket_client.fd = -1;
+    connected_socket_client.hd = nullptr;
+  }
+
+  return ret;
+}
+
+esp_err_t WebSocketLogger::register_socket_client(httpd_req_t *req)
+{
+  if (connected_socket_client.fd != -1 && connected_socket_client.hd != nullptr)
+  {
+    // we're already connected
+    return ESP_OK;
+  }
+
+  connected_socket_client.hd = req->handle;
+  connected_socket_client.fd = httpd_req_to_sockfd(req);
+  return ESP_OK;
+}
+
+void WebSocketLogger::unregister_socket_client()
+{
+  connected_socket_client.fd = -1;
+  connected_socket_client.hd = nullptr;
+}
+
+char *WebSocketLogger::get_websocket_log_buffer()
+{
+  return this->ws_log_buffer;
+}

components/WebSocketLogger/WebSocketLogger/WebSocketLogger.hpp

@@ -0,0 +1,39 @@
+#pragma once
+#ifndef WEBSOCKETLOGGER_HPP
+#define WEBSOCKETLOGGER_HPP
+
+#include "esp_http_server.h"
+#include "esp_log.h"
+
+#define WS_LOG_BUFFER_LEN 1024
+
+struct async_resp_arg
+{
+  httpd_handle_t hd;
+  int fd;
+};
+
+namespace LoggerHelpers
+{
+  void ws_async_send(void *arg);
+}
+
+class WebSocketLogger
+{
+private:
+  async_resp_arg connected_socket_client;
+  char ws_log_buffer[WS_LOG_BUFFER_LEN];
+
+public:
+  WebSocketLogger();
+
+  esp_err_t log_message(const char *format, va_list args);
+  esp_err_t register_socket_client(httpd_req_t *req);
+  void unregister_socket_client();
+  bool is_client_connected();
+  char *get_websocket_log_buffer();
+};
+
+extern WebSocketLogger webSocketLogger;
+
+#endif