EMS-ESP32/lib/PsychicHttp/src_old/PsychicWebSocket.cpp

#include "PsychicWebSocket.h"

/*************************************/
/*  PsychicWebSocketRequest      */
/*************************************/

PsychicWebSocketRequest::PsychicWebSocketRequest(PsychicRequest * req)
    : PsychicRequest(req->server(), req->request())
    , _client(req->client()) {
}

PsychicWebSocketRequest::~PsychicWebSocketRequest() {
}

PsychicWebSocketClient * PsychicWebSocketRequest::client() {
    return &_client;
}

esp_err_t PsychicWebSocketRequest::reply(httpd_ws_frame_t * ws_pkt) {
    return httpd_ws_send_frame(this->_req, ws_pkt);
}

esp_err_t PsychicWebSocketRequest::reply(httpd_ws_type_t op, const void * data, size_t len) {
    httpd_ws_frame_t ws_pkt;
    memset(&ws_pkt, 0, sizeof(httpd_ws_frame_t));

    ws_pkt.payload = (uint8_t *)data;
    ws_pkt.len     = len;
    ws_pkt.type    = op;

    return this->reply(&ws_pkt);
}

esp_err_t PsychicWebSocketRequest::reply(const char * buf) {
    return this->reply(HTTPD_WS_TYPE_TEXT, buf, strlen(buf));
}

/*************************************/
/*  PsychicWebSocketClient   */
/*************************************/

PsychicWebSocketClient::PsychicWebSocketClient(PsychicClient * client)
    : PsychicClient(client->server(), client->socket()) {
}

PsychicWebSocketClient::~PsychicWebSocketClient() {
}

esp_err_t PsychicWebSocketClient::sendMessage(httpd_ws_frame_t * ws_pkt) {
    return httpd_ws_send_frame_async(this->server(), this->socket(), ws_pkt);
}

esp_err_t PsychicWebSocketClient::sendMessage(httpd_ws_type_t op, const void * data, size_t len) {
    httpd_ws_frame_t ws_pkt;
    memset(&ws_pkt, 0, sizeof(httpd_ws_frame_t));

    ws_pkt.payload = (uint8_t *)data;
    ws_pkt.len     = len;
    ws_pkt.type    = op;

    return this->sendMessage(&ws_pkt);
}

esp_err_t PsychicWebSocketClient::sendMessage(const char * buf) {
    return this->sendMessage(HTTPD_WS_TYPE_TEXT, buf, strlen(buf));
}

PsychicWebSocketHandler::PsychicWebSocketHandler()
    : PsychicHandler()
    , _onOpen(NULL)
    , _onFrame(NULL)
    , _onClose(NULL) {
}

PsychicWebSocketHandler::~PsychicWebSocketHandler() {
}

PsychicWebSocketClient * PsychicWebSocketHandler::getClient(int socket) {
    PsychicClient * client = PsychicHandler::getClient(socket);
    if (client == NULL)
        return NULL;

    if (client->_friend == NULL) {
        DUMP(socket);
        return NULL;
    }

    return (PsychicWebSocketClient *)client->_friend;
}

PsychicWebSocketClient * PsychicWebSocketHandler::getClient(PsychicClient * client) {
    return getClient(client->socket());
}

void PsychicWebSocketHandler::addClient(PsychicClient * client) {
    client->_friend = new PsychicWebSocketClient(client);
    PsychicHandler::addClient(client);
}

void PsychicWebSocketHandler::removeClient(PsychicClient * client) {
    PsychicHandler::removeClient(client);
    delete (PsychicWebSocketClient *)client->_friend;
    client->_friend = NULL;
}

void PsychicWebSocketHandler::openCallback(PsychicClient * client) {
    PsychicWebSocketClient * buddy = getClient(client);
    if (buddy == NULL) {
        TRACE();
        return;
    }

    if (_onOpen != NULL)
        _onOpen(getClient(buddy));
}

void PsychicWebSocketHandler::closeCallback(PsychicClient * client) {
    PsychicWebSocketClient * buddy = getClient(client);
    if (buddy == NULL) {
        TRACE();
        return;
    }

    if (_onClose != NULL)
        _onClose(getClient(buddy));
}

bool PsychicWebSocketHandler::isWebSocket() {
    return true;
}

esp_err_t PsychicWebSocketHandler::handleRequest(PsychicRequest * request) {
    //lookup our client
    PsychicClient * client = checkForNewClient(request->client());

    // beginning of the ws URI handler and our onConnect hook
    if (request->method() == HTTP_GET) {
        if (client->isNew)
            openCallback(client);

        return ESP_OK;
    }

    //prep our request
    PsychicWebSocketRequest wsRequest(request);

    //init our memory for storing the packet
    httpd_ws_frame_t ws_pkt;
    memset(&ws_pkt, 0, sizeof(httpd_ws_frame_t));
    ws_pkt.type   = HTTPD_WS_TYPE_TEXT;
    uint8_t * buf = NULL;

    /* Set max_len = 0 to get the frame len */
    esp_err_t ret = httpd_ws_recv_frame(wsRequest.request(), &ws_pkt, 0);
    if (ret != ESP_OK) {
        ESP_LOGE(PH_TAG, "httpd_ws_recv_frame failed to get frame len with %s", esp_err_to_name(ret));
        return ret;
    }

    //okay, now try to load the packet
    ESP_LOGI(PH_TAG, "frame len is %d", ws_pkt.len);
    if (ws_pkt.len) {
        /* ws_pkt.len + 1 is for NULL termination as we are expecting a string */
        buf = (uint8_t *)calloc(1, ws_pkt.len + 1);
        if (buf == NULL) {
            ESP_LOGE(PH_TAG, "Failed to calloc memory for buf");
            return ESP_ERR_NO_MEM;
        }
        ws_pkt.payload = buf;
        /* Set max_len = ws_pkt.len to get the frame payload */
        ret = httpd_ws_recv_frame(wsRequest.request(), &ws_pkt, ws_pkt.len);
        if (ret != ESP_OK) {
            ESP_LOGE(PH_TAG, "httpd_ws_recv_frame failed with %s", esp_err_to_name(ret));
            free(buf);
            return ret;
        }
        ESP_LOGI(PH_TAG, "Got packet with message: %s", ws_pkt.payload);
    }

    // Text messages are our payload.
    if (ws_pkt.type == HTTPD_WS_TYPE_TEXT) {
        if (this->_onFrame != NULL)
            ret = this->_onFrame(&wsRequest, &ws_pkt);
    }

    //logging housekeeping
    if (ret != ESP_OK)
        ESP_LOGE(PH_TAG, "httpd_ws_send_frame failed with %s", esp_err_to_name(ret));
    ESP_LOGI(PH_TAG,
             "ws_handler: httpd_handle_t=%p, sockfd=%d, client_info:%d",
             request->server(),
             httpd_req_to_sockfd(request->request()),
             httpd_ws_get_fd_info(request->server(), httpd_req_to_sockfd(request->request())));

    //dont forget to release our buffer memory
    free(buf);

    return ret;
}

PsychicWebSocketHandler * PsychicWebSocketHandler::onOpen(PsychicWebSocketClientCallback fn) {
    _onOpen = fn;
    return this;
}

PsychicWebSocketHandler * PsychicWebSocketHandler::onFrame(PsychicWebSocketFrameCallback fn) {
    _onFrame = fn;
    return this;
}

PsychicWebSocketHandler * PsychicWebSocketHandler::onClose(PsychicWebSocketClientCallback fn) {
    _onClose = fn;
    return this;
}

void PsychicWebSocketHandler::sendAll(httpd_ws_frame_t * ws_pkt) {
    for (PsychicClient * client : _clients) {
        ESP_LOGI(PH_TAG, "Active client (fd=%d) -> sending async message", client->socket());

        if (client->_friend == NULL) {
            TRACE();
            return;
        }

        if (((PsychicWebSocketClient *)client->_friend)->sendMessage(ws_pkt) != ESP_OK)
            break;
    }
}

void PsychicWebSocketHandler::sendAll(httpd_ws_type_t op, const void * data, size_t len) {
    httpd_ws_frame_t ws_pkt;
    memset(&ws_pkt, 0, sizeof(httpd_ws_frame_t));

    ws_pkt.payload = (uint8_t *)data;
    ws_pkt.len     = len;
    ws_pkt.type    = op;

    this->sendAll(&ws_pkt);
}

void PsychicWebSocketHandler::sendAll(const char * buf) {
    this->sendAll(HTTPD_WS_TYPE_TEXT, buf, strlen(buf));
}