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Merge branch 'feature/websocket_client_v3.3' into 'release/v3.3' 

Feature/websocket client v3.3

See merge request espressif/esp-idf!8040
This commit is contained in:
David Čermák 2020-04-02 20:28:24 +08:00
parent a71e85fb63 b56012783c
commit 1ba3bf2976
19 changed files with 1923 additions and 44 deletions
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6
components/esp_websocket_client/CMakeLists.txt Normal file
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set(COMPONENT_SRCS "esp_websocket_client.c")
set(COMPONENT_ADD_INCLUDEDIRS "include")
set(COMPONENT_REQUIRES lwip esp-tls tcp_transport nghttp)
register_component()

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components/esp_websocket_client/component.mk Normal file
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COMPONENT_SRCDIRS := .
COMPONENT_ADD_INCLUDEDIRS := include

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components/esp_websocket_client/esp_websocket_client.c Normal file
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// Copyright 2015-2018 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <stdio.h>
#include "esp_websocket_client.h"
#include "esp_transport.h"
#include "esp_transport_tcp.h"
#include "esp_transport_ssl.h"
#include "esp_transport_ws.h"
/* using uri parser */
#include "http_parser.h"
#include "freertos/task.h"
#include "freertos/semphr.h"
#include "freertos/queue.h"
#include "freertos/event_groups.h"
#include "esp_log.h"
#include "esp_timer.h"
static const char *TAG = "WEBSOCKET_CLIENT";
#define WEBSOCKET_TCP_DEFAULT_PORT (80)
#define WEBSOCKET_SSL_DEFAULT_PORT (443)
#define WEBSOCKET_BUFFER_SIZE_BYTE (1024)
#define WEBSOCKET_RECONNECT_TIMEOUT_MS (10*1000)
#define WEBSOCKET_TASK_PRIORITY (5)
#define WEBSOCKET_TASK_STACK (4*1024)
#define WEBSOCKET_NETWORK_TIMEOUT_MS (10*1000)
#define WEBSOCKET_PING_TIMEOUT_MS (10*1000)
#define WEBSOCKET_EVENT_QUEUE_SIZE (1)
#define ESP_WS_CLIENT_MEM_CHECK(TAG, a, action) if (!(a)) { \
ESP_LOGE(TAG,"%s:%d (%s): %s", __FILE__, __LINE__, __FUNCTION__, "Memory exhausted"); \
action; \
}
const static int STOPPED_BIT = BIT0;
ESP_EVENT_DEFINE_BASE(WEBSOCKET_EVENTS);
typedef struct {
int task_stack;
int task_prio;
char *uri;
char *host;
char *path;
char *scheme;
char *username;
char *password;
int port;
bool auto_reconnect;
void *user_context;
int network_timeout_ms;
char *subprotocol;
char *user_agent;
char *headers;
} websocket_config_storage_t;
typedef enum {
WEBSOCKET_STATE_ERROR = -1,
WEBSOCKET_STATE_UNKNOW = 0,
WEBSOCKET_STATE_INIT,
WEBSOCKET_STATE_CONNECTED,
WEBSOCKET_STATE_WAIT_TIMEOUT,
} websocket_client_state_t;
struct esp_websocket_client {
esp_event_loop_handle_t event_handle;
esp_transport_list_handle_t transport_list;
esp_transport_handle_t transport;
websocket_config_storage_t *config;
websocket_client_state_t state;
uint64_t keepalive_tick_ms;
uint64_t reconnect_tick_ms;
uint64_t ping_tick_ms;
int wait_timeout_ms;
int auto_reconnect;
bool run;
EventGroupHandle_t status_bits;
xSemaphoreHandle lock;
char *rx_buffer;
char *tx_buffer;
int buffer_size;
ws_transport_opcodes_t last_opcode;
int payload_len;
int payload_offset;
};
static uint64_t _tick_get_ms(void)
{
return esp_timer_get_time()/1000;
}
static esp_err_t esp_websocket_client_dispatch_event(esp_websocket_client_handle_t client,
esp_websocket_event_id_t event,
const char *data,
int data_len)
{
esp_err_t err;
esp_websocket_event_data_t event_data;
event_data.client = client;
event_data.user_context = client->config->user_context;
event_data.data_ptr = data;
event_data.data_len = data_len;
event_data.op_code = client->last_opcode;
event_data.payload_len = client->payload_len;
event_data.payload_offset = client->payload_offset;
if ((err = esp_event_post_to(client->event_handle,
WEBSOCKET_EVENTS, event,
&event_data,
sizeof(esp_websocket_event_data_t),
portMAX_DELAY)) != ESP_OK) {
return err;
}
return esp_event_loop_run(client->event_handle, 0);
}
static esp_err_t esp_websocket_client_abort_connection(esp_websocket_client_handle_t client)
{
esp_transport_close(client->transport);
client->wait_timeout_ms = WEBSOCKET_RECONNECT_TIMEOUT_MS;
client->reconnect_tick_ms = _tick_get_ms();
client->state = WEBSOCKET_STATE_WAIT_TIMEOUT;
ESP_LOGI(TAG, "Reconnect after %d ms", client->wait_timeout_ms);
esp_websocket_client_dispatch_event(client, WEBSOCKET_EVENT_DISCONNECTED, NULL, 0);
return ESP_OK;
}
static esp_err_t esp_websocket_client_set_config(esp_websocket_client_handle_t client, const esp_websocket_client_config_t *config)
{
websocket_config_storage_t *cfg = client->config;
cfg->task_prio = config->task_prio;
if (cfg->task_prio <= 0) {
cfg->task_prio = WEBSOCKET_TASK_PRIORITY;
}
cfg->task_stack = config->task_stack;
if (cfg->task_stack == 0) {
cfg->task_stack = WEBSOCKET_TASK_STACK;
}
if (config->host) {
cfg->host = strdup(config->host);
ESP_WS_CLIENT_MEM_CHECK(TAG, cfg->host, return ESP_ERR_NO_MEM);
}
if (config->port) {
cfg->port = config->port;
}
if (config->username) {
free(cfg->username);
cfg->username = strdup(config->username);
ESP_WS_CLIENT_MEM_CHECK(TAG, cfg->username, return ESP_ERR_NO_MEM);
}
if (config->password) {
free(cfg->password);
cfg->password = strdup(config->password);
ESP_WS_CLIENT_MEM_CHECK(TAG, cfg->password, return ESP_ERR_NO_MEM);
}
if (config->uri) {
free(cfg->uri);
cfg->uri = strdup(config->uri);
ESP_WS_CLIENT_MEM_CHECK(TAG, cfg->uri, return ESP_ERR_NO_MEM);
}
if (config->path) {
free(cfg->path);
cfg->path = strdup(config->path);
ESP_WS_CLIENT_MEM_CHECK(TAG, cfg->path, return ESP_ERR_NO_MEM);
}
if (config->subprotocol) {
free(cfg->subprotocol);
cfg->subprotocol = strdup(config->subprotocol);
ESP_WS_CLIENT_MEM_CHECK(TAG, cfg->subprotocol, return ESP_ERR_NO_MEM);
}
if (config->user_agent) {
free(cfg->user_agent);
cfg->user_agent = strdup(config->user_agent);
ESP_WS_CLIENT_MEM_CHECK(TAG, cfg->user_agent, return ESP_ERR_NO_MEM);
}
if (config->headers) {
free(cfg->headers);
cfg->headers = strdup(config->headers);
ESP_WS_CLIENT_MEM_CHECK(TAG, cfg->headers, return ESP_ERR_NO_MEM);
}
cfg->network_timeout_ms = WEBSOCKET_NETWORK_TIMEOUT_MS;
cfg->user_context = config->user_context;
cfg->auto_reconnect = true;
if (config->disable_auto_reconnect) {
cfg->auto_reconnect = false;
}
return ESP_OK;
}
static esp_err_t esp_websocket_client_destroy_config(esp_websocket_client_handle_t client)
{
if (client == NULL) {
return ESP_ERR_INVALID_ARG;
}
websocket_config_storage_t *cfg = client->config;
if (client->config == NULL) {
return ESP_ERR_INVALID_ARG;
}
free(cfg->host);
free(cfg->uri);
free(cfg->path);
free(cfg->scheme);
free(cfg->username);
free(cfg->password);
free(cfg->subprotocol);
free(cfg->user_agent);
free(cfg->headers);
memset(cfg, 0, sizeof(websocket_config_storage_t));
free(client->config);
client->config = NULL;
return ESP_OK;
}
static void set_websocket_transport_optional_settings(esp_websocket_client_handle_t client, esp_transport_handle_t trans)
{
if (trans && client->config->path) {
esp_transport_ws_set_path(trans, client->config->path);
}
if (trans && client->config->subprotocol) {
esp_transport_ws_set_subprotocol(trans, client->config->subprotocol);
}
if (trans && client->config->user_agent) {
esp_transport_ws_set_user_agent(trans, client->config->user_agent);
}
if (trans && client->config->headers) {
esp_transport_ws_set_headers(trans, client->config->headers);
}
}
esp_websocket_client_handle_t esp_websocket_client_init(const esp_websocket_client_config_t *config)
{
esp_websocket_client_handle_t client = calloc(1, sizeof(struct esp_websocket_client));
ESP_WS_CLIENT_MEM_CHECK(TAG, client, return NULL);
esp_event_loop_args_t event_args = {
.queue_size = WEBSOCKET_EVENT_QUEUE_SIZE,
.task_name = NULL // no task will be created
};
if (esp_event_loop_create(&event_args, &client->event_handle) != ESP_OK) {
ESP_LOGE(TAG, "Error create event handler for websocket client");
free(client);
return NULL;
}
client->lock = xSemaphoreCreateRecursiveMutex();
ESP_WS_CLIENT_MEM_CHECK(TAG, client->lock, goto _websocket_init_fail);
client->config = calloc(1, sizeof(websocket_config_storage_t));
ESP_WS_CLIENT_MEM_CHECK(TAG, client->config, goto _websocket_init_fail);
client->transport_list = esp_transport_list_init();
ESP_WS_CLIENT_MEM_CHECK(TAG, client->transport_list, goto _websocket_init_fail);
esp_transport_handle_t tcp = esp_transport_tcp_init();
ESP_WS_CLIENT_MEM_CHECK(TAG, tcp, goto _websocket_init_fail);
esp_transport_set_default_port(tcp, WEBSOCKET_TCP_DEFAULT_PORT);
esp_transport_list_add(client->transport_list, tcp, "_tcp"); // need to save to transport list, for cleanup
esp_transport_handle_t ws = esp_transport_ws_init(tcp);
ESP_WS_CLIENT_MEM_CHECK(TAG, ws, goto _websocket_init_fail);
esp_transport_set_default_port(ws, WEBSOCKET_TCP_DEFAULT_PORT);
esp_transport_list_add(client->transport_list, ws, "ws");
if (config->transport == WEBSOCKET_TRANSPORT_OVER_TCP) {
asprintf(&client->config->scheme, "ws");
ESP_WS_CLIENT_MEM_CHECK(TAG, client->config->scheme, goto _websocket_init_fail);
}
esp_transport_handle_t ssl = esp_transport_ssl_init();
ESP_WS_CLIENT_MEM_CHECK(TAG, ssl, goto _websocket_init_fail);
esp_transport_set_default_port(ssl, WEBSOCKET_SSL_DEFAULT_PORT);
if (config->cert_pem) {
esp_transport_ssl_set_cert_data(ssl, config->cert_pem, strlen(config->cert_pem));
}
esp_transport_list_add(client->transport_list, ssl, "_ssl"); // need to save to transport list, for cleanup
esp_transport_handle_t wss = esp_transport_ws_init(ssl);
ESP_WS_CLIENT_MEM_CHECK(TAG, wss, goto _websocket_init_fail);
esp_transport_set_default_port(wss, WEBSOCKET_SSL_DEFAULT_PORT);
esp_transport_list_add(client->transport_list, wss, "wss");
if (config->transport == WEBSOCKET_TRANSPORT_OVER_SSL) {
asprintf(&client->config->scheme, "wss");
ESP_WS_CLIENT_MEM_CHECK(TAG, client->config->scheme, goto _websocket_init_fail);
}
if (config->uri) {
if (esp_websocket_client_set_uri(client, config->uri) != ESP_OK) {
ESP_LOGE(TAG, "Invalid uri");
goto _websocket_init_fail;
}
}
if (esp_websocket_client_set_config(client, config) != ESP_OK) {
ESP_LOGE(TAG, "Failed to set the configuration");
goto _websocket_init_fail;
}
if (client->config->scheme == NULL) {
asprintf(&client->config->scheme, "ws");
ESP_WS_CLIENT_MEM_CHECK(TAG, client->config->scheme, goto _websocket_init_fail);
}
set_websocket_transport_optional_settings(client, esp_transport_list_get_transport(client->transport_list, "ws"));
set_websocket_transport_optional_settings(client, esp_transport_list_get_transport(client->transport_list, "wss"));
client->keepalive_tick_ms = _tick_get_ms();
client->reconnect_tick_ms = _tick_get_ms();
client->ping_tick_ms = _tick_get_ms();
int buffer_size = config->buffer_size;
if (buffer_size <= 0) {
buffer_size = WEBSOCKET_BUFFER_SIZE_BYTE;
}
client->rx_buffer = malloc(buffer_size);
ESP_WS_CLIENT_MEM_CHECK(TAG, client->rx_buffer, {
goto _websocket_init_fail;
});
client->tx_buffer = malloc(buffer_size);
ESP_WS_CLIENT_MEM_CHECK(TAG, client->tx_buffer, {
goto _websocket_init_fail;
});
client->status_bits = xEventGroupCreate();
ESP_WS_CLIENT_MEM_CHECK(TAG, client->status_bits, {
goto _websocket_init_fail;
});
client->buffer_size = buffer_size;
return client;
_websocket_init_fail:
esp_websocket_client_destroy(client);
return NULL;
}
esp_err_t esp_websocket_client_destroy(esp_websocket_client_handle_t client)
{
if (client == NULL) {
return ESP_ERR_INVALID_ARG;
}
if (client->run) {
esp_websocket_client_stop(client);
}
if (client->event_handle) {
esp_event_loop_delete(client->event_handle);
}
esp_websocket_client_destroy_config(client);
esp_transport_list_destroy(client->transport_list);
vQueueDelete(client->lock);
free(client->tx_buffer);
free(client->rx_buffer);
if (client->status_bits) {
vEventGroupDelete(client->status_bits);
}
free(client);
client = NULL;
return ESP_OK;
}
esp_err_t esp_websocket_client_set_uri(esp_websocket_client_handle_t client, const char *uri)
{
if (client == NULL || uri == NULL) {
return ESP_ERR_INVALID_ARG;
}
struct http_parser_url puri;
http_parser_url_init(&puri);
int parser_status = http_parser_parse_url(uri, strlen(uri), 0, &puri);
if (parser_status != 0) {
ESP_LOGE(TAG, "Error parse uri = %s", uri);
return ESP_FAIL;
}
if (puri.field_data[UF_SCHEMA].len) {
free(client->config->scheme);
asprintf(&client->config->scheme, "%.*s", puri.field_data[UF_SCHEMA].len, uri + puri.field_data[UF_SCHEMA].off);
ESP_WS_CLIENT_MEM_CHECK(TAG, client->config->scheme, return ESP_ERR_NO_MEM);
}
if (puri.field_data[UF_HOST].len) {
free(client->config->host);
asprintf(&client->config->host, "%.*s", puri.field_data[UF_HOST].len, uri + puri.field_data[UF_HOST].off);
ESP_WS_CLIENT_MEM_CHECK(TAG, client->config->host, return ESP_ERR_NO_MEM);
}
if (puri.field_data[UF_PATH].len || puri.field_data[UF_QUERY].len) {
free(client->config->path);
if (puri.field_data[UF_QUERY].len == 0) {
asprintf(&client->config->path, "%.*s", puri.field_data[UF_PATH].len, uri + puri.field_data[UF_PATH].off);
} else if (puri.field_data[UF_PATH].len == 0) {
asprintf(&client->config->path, "/?%.*s", puri.field_data[UF_QUERY].len, uri + puri.field_data[UF_QUERY].off);
} else {
asprintf(&client->config->path, "%.*s?%.*s", puri.field_data[UF_PATH].len, uri + puri.field_data[UF_PATH].off,
puri.field_data[UF_QUERY].len, uri + puri.field_data[UF_QUERY].off);
}
ESP_WS_CLIENT_MEM_CHECK(TAG, client->config->path, return ESP_ERR_NO_MEM);
}
if (puri.field_data[UF_PORT].off) {
client->config->port = strtol((const char*)(uri + puri.field_data[UF_PORT].off), NULL, 10);
}
if (puri.field_data[UF_USERINFO].len) {
char *user_info = NULL;
asprintf(&user_info, "%.*s", puri.field_data[UF_USERINFO].len, uri + puri.field_data[UF_USERINFO].off);
if (user_info) {
char *pass = strchr(user_info, ':');
if (pass) {
pass[0] = 0; //terminal username
pass ++;
free(client->config->password);
client->config->password = strdup(pass);
ESP_WS_CLIENT_MEM_CHECK(TAG, client->config->password, return ESP_ERR_NO_MEM);
}
free(client->config->username);
client->config->username = strdup(user_info);
ESP_WS_CLIENT_MEM_CHECK(TAG, client->config->username, return ESP_ERR_NO_MEM);
free(user_info);
} else {
return ESP_ERR_NO_MEM;
}
}
return ESP_OK;
}
static esp_err_t esp_websocket_client_recv(esp_websocket_client_handle_t client)
{
int rlen;
client->payload_offset = 0;
do {
rlen = esp_transport_read(client->transport, client->rx_buffer, client->buffer_size, client->config->network_timeout_ms);
if (rlen < 0) {
ESP_LOGE(TAG, "Error read data");
esp_websocket_client_abort_connection(client);
return ESP_FAIL;
}
client->payload_len = esp_transport_ws_get_read_payload_len(client->transport);
client->last_opcode = esp_transport_ws_get_read_opcode(client->transport);
esp_websocket_client_dispatch_event(client, WEBSOCKET_EVENT_DATA, client->rx_buffer, rlen);
client->payload_offset += rlen;
} while (client->payload_offset < client->payload_len);
// if a PING message received -> send out the PONG, this will not work for PING messages with payload longer than buffer len
if (client->last_opcode == WS_TRANSPORT_OPCODES_PING) {
const char *data = (client->payload_len == 0) ? NULL : client->rx_buffer;
esp_transport_ws_send_raw(client->transport, WS_TRANSPORT_OPCODES_PONG, data, client->payload_len,
client->config->network_timeout_ms);
}
return ESP_OK;
}
static void esp_websocket_client_task(void *pv)
{
const int lock_timeout = portMAX_DELAY;
esp_websocket_client_handle_t client = (esp_websocket_client_handle_t) pv;
client->run = true;
//get transport by scheme
client->transport = esp_transport_list_get_transport(client->transport_list, client->config->scheme);
if (client->transport == NULL) {
ESP_LOGE(TAG, "There are no transports valid, stop websocket client");
client->run = false;
}
//default port
if (client->config->port == 0) {
client->config->port = esp_transport_get_default_port(client->transport);
}
client->state = WEBSOCKET_STATE_INIT;
xEventGroupClearBits(client->status_bits, STOPPED_BIT);
int read_select = 0;
while (client->run) {
if (xSemaphoreTakeRecursive(client->lock, lock_timeout) != pdPASS) {
ESP_LOGE(TAG, "Failed to lock ws-client tasks, exitting the task...");
break;
}
switch ((int)client->state) {
case WEBSOCKET_STATE_INIT:
if (client->transport == NULL) {
ESP_LOGE(TAG, "There are no transport");
client->run = false;
break;
}
if (esp_transport_connect(client->transport,
client->config->host,
client->config->port,
client->config->network_timeout_ms) < 0) {
ESP_LOGE(TAG, "Error transport connect");
esp_websocket_client_abort_connection(client);
break;
}
ESP_LOGD(TAG, "Transport connected to %s://%s:%d", client->config->scheme, client->config->host, client->config->port);
client->state = WEBSOCKET_STATE_CONNECTED;
esp_websocket_client_dispatch_event(client, WEBSOCKET_EVENT_CONNECTED, NULL, 0);
break;
case WEBSOCKET_STATE_CONNECTED:
if (_tick_get_ms() - client->ping_tick_ms > WEBSOCKET_PING_TIMEOUT_MS) {
client->ping_tick_ms = _tick_get_ms();
ESP_LOGD(TAG, "Sending PING...");
esp_transport_ws_send_raw(client->transport, WS_TRANSPORT_OPCODES_PING, NULL, 0, client->config->network_timeout_ms);
}
if (read_select == 0) {
ESP_LOGV(TAG, "Read poll timeout: skipping esp_transport_read()...");
break;
}
client->ping_tick_ms = _tick_get_ms();
if (esp_websocket_client_recv(client) == ESP_FAIL) {
ESP_LOGE(TAG, "Error receive data");
esp_websocket_client_abort_connection(client);
break;
}
break;
case WEBSOCKET_STATE_WAIT_TIMEOUT:
if (!client->config->auto_reconnect) {
client->run = false;
break;
}
if (_tick_get_ms() - client->reconnect_tick_ms > client->wait_timeout_ms) {
client->state = WEBSOCKET_STATE_INIT;
client->reconnect_tick_ms = _tick_get_ms();
ESP_LOGD(TAG, "Reconnecting...");
}
break;
}
xSemaphoreGiveRecursive(client->lock);
if (WEBSOCKET_STATE_CONNECTED == client->state) {
read_select = esp_transport_poll_read(client->transport, 1000); //Poll every 1000ms
if (read_select < 0) {
ESP_LOGE(TAG, "Network error: esp_transport_poll_read() returned %d, errno=%d", read_select, errno);
esp_websocket_client_abort_connection(client);
}
} else if (WEBSOCKET_STATE_WAIT_TIMEOUT == client->state) {
// waiting for reconnecting...
vTaskDelay(client->wait_timeout_ms / 2 / portTICK_RATE_MS);
}
}
esp_transport_close(client->transport);
xEventGroupSetBits(client->status_bits, STOPPED_BIT);
client->state = WEBSOCKET_STATE_UNKNOW;
vTaskDelete(NULL);
}
esp_err_t esp_websocket_client_start(esp_websocket_client_handle_t client)
{
if (client == NULL) {
return ESP_ERR_INVALID_ARG;
}
if (client->state >= WEBSOCKET_STATE_INIT) {
ESP_LOGE(TAG, "The client has started");
return ESP_FAIL;
}
if (xTaskCreate(esp_websocket_client_task, "websocket_task", client->config->task_stack, client, client->config->task_prio, NULL) != pdTRUE) {
ESP_LOGE(TAG, "Error create websocket task");
return ESP_FAIL;
}
xEventGroupClearBits(client->status_bits, STOPPED_BIT);
return ESP_OK;
}
esp_err_t esp_websocket_client_stop(esp_websocket_client_handle_t client)
{
if (client == NULL) {
return ESP_ERR_INVALID_ARG;
}
if (!client->run) {
ESP_LOGW(TAG, "Client was not started");
return ESP_FAIL;
}
client->run = false;
xEventGroupWaitBits(client->status_bits, STOPPED_BIT, false, true, portMAX_DELAY);
client->state = WEBSOCKET_STATE_UNKNOW;
return ESP_OK;
}
static int esp_websocket_client_send_with_opcode(esp_websocket_client_handle_t client, ws_transport_opcodes_t opcode, const char *data, int len, TickType_t timeout);
int esp_websocket_client_send_text(esp_websocket_client_handle_t client, const char *data, int len, TickType_t timeout)
{
return esp_websocket_client_send_with_opcode(client, WS_TRANSPORT_OPCODES_TEXT, data, len, timeout);
}
int esp_websocket_client_send(esp_websocket_client_handle_t client, const char *data, int len, TickType_t timeout)
{
return esp_websocket_client_send_with_opcode(client, WS_TRANSPORT_OPCODES_BINARY, data, len, timeout);
}
int esp_websocket_client_send_bin(esp_websocket_client_handle_t client, const char *data, int len, TickType_t timeout)
{
return esp_websocket_client_send_with_opcode(client, WS_TRANSPORT_OPCODES_BINARY, data, len, timeout);
}
static int esp_websocket_client_send_with_opcode(esp_websocket_client_handle_t client, ws_transport_opcodes_t opcode, const char *data, int len, TickType_t timeout)
{
int need_write = len;
int wlen = 0, widx = 0;
int ret = ESP_FAIL;
if (client == NULL || data == NULL || len <= 0) {
ESP_LOGE(TAG, "Invalid arguments");
return ESP_FAIL;
}
if (xSemaphoreTakeRecursive(client->lock, timeout) != pdPASS) {
ESP_LOGE(TAG, "Could not lock ws-client within %d timeout", timeout);
return ESP_FAIL;
}
if (!esp_websocket_client_is_connected(client)) {
ESP_LOGE(TAG, "Websocket client is not connected");
goto unlock_and_return;
}
if (client->transport == NULL) {
ESP_LOGE(TAG, "Invalid transport");
goto unlock_and_return;
}
while (widx < len) {
if (need_write > client->buffer_size) {
need_write = client->buffer_size;
}
memcpy(client->tx_buffer, data + widx, need_write);
// send with ws specific way and specific opcode
wlen = esp_transport_ws_send_raw(client->transport, opcode, (char *)client->tx_buffer, need_write,
(timeout==portMAX_DELAY)? -1 : timeout * portTICK_PERIOD_MS);
if (wlen <= 0) {
ret = wlen;
ESP_LOGE(TAG, "Network error: esp_transport_write() returned %d, errno=%d", ret, errno);
goto unlock_and_return;
}
widx += wlen;
need_write = len - widx;
}
ret = widx;
unlock_and_return:
xSemaphoreGiveRecursive(client->lock);
return ret;
}
bool esp_websocket_client_is_connected(esp_websocket_client_handle_t client)
{
if (client == NULL) {
return false;
}
return client->state == WEBSOCKET_STATE_CONNECTED;
}
esp_err_t esp_websocket_register_events(esp_websocket_client_handle_t client,
esp_websocket_event_id_t event,
esp_event_handler_t event_handler,
void *event_handler_arg)
{
if (client == NULL) {
return ESP_ERR_INVALID_ARG;
}
return esp_event_handler_register_with(client->event_handle, WEBSOCKET_EVENTS, event, event_handler, event_handler_arg);
}

216
components/esp_websocket_client/include/esp_websocket_client.h Normal file
View File

@ -0,0 +1,216 @@
// Copyright 2015-2018 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef _ESP_WEBSOCKET_CLIENT_H_
#define _ESP_WEBSOCKET_CLIENT_H_
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
#include "freertos/FreeRTOS.h"
#include "esp_err.h"
#include "esp_event.h"
#ifdef __cplusplus
extern "C" {
#endif
typedef struct esp_websocket_client *esp_websocket_client_handle_t;
ESP_EVENT_DECLARE_BASE(WEBSOCKET_EVENTS); // declaration of the task events family
/**
* @brief Websocket Client events id
*/
typedef enum {
WEBSOCKET_EVENT_ANY = -1,
WEBSOCKET_EVENT_ERROR = 0, /*!< This event occurs when there are any errors during execution */
WEBSOCKET_EVENT_CONNECTED, /*!< Once the Websocket has been connected to the server, no data exchange has been performed */
WEBSOCKET_EVENT_DISCONNECTED, /*!< The connection has been disconnected */
WEBSOCKET_EVENT_DATA, /*!< When receiving data from the server, possibly multiple portions of the packet */
WEBSOCKET_EVENT_MAX
} esp_websocket_event_id_t;
/**
* @brief Websocket event data
*/
typedef struct {
const char *data_ptr; /*!< Data pointer */
int data_len; /*!< Data length */
uint8_t op_code; /*!< Received opcode */
esp_websocket_client_handle_t client; /*!< esp_websocket_client_handle_t context */
void *user_context; /*!< user_data context, from esp_websocket_client_config_t user_data */
int payload_len; /*!< Total payload length, payloads exceeding buffer will be posted through multiple events */
int payload_offset; /*!< Actual offset for the data associated with this event */
} esp_websocket_event_data_t;
/**
* @brief Websocket Client transport
*/
typedef enum {
WEBSOCKET_TRANSPORT_UNKNOWN = 0x0, /*!< Transport unknown */
WEBSOCKET_TRANSPORT_OVER_TCP, /*!< Transport over tcp */
WEBSOCKET_TRANSPORT_OVER_SSL, /*!< Transport over ssl */
} esp_websocket_transport_t;
/**
* @brief Websocket client setup configuration
*/
typedef struct {
const char *uri; /*!< Websocket URI, the information on the URI can be overrides the other fields below, if any */
const char *host; /*!< Domain or IP as string */
int port; /*!< Port to connect, default depend on esp_websocket_transport_t (80 or 443) */
const char *username; /*!< Using for Http authentication - Not supported for now */
const char *password; /*!< Using for Http authentication - Not supported for now */
const char *path; /*!< HTTP Path, if not set, default is `/` */
bool disable_auto_reconnect; /*!< Disable the automatic reconnect function when disconnected */
void *user_context; /*!< HTTP user data context */
int task_prio; /*!< Websocket task priority */
int task_stack; /*!< Websocket task stack */
int buffer_size; /*!< Websocket buffer size */
const char *cert_pem; /*!< SSL Certification, PEM format as string, if the client requires to verify server */
esp_websocket_transport_t transport; /*!< Websocket transport type, see `esp_websocket_transport_t */
char *subprotocol; /*!< Websocket subprotocol */
char *user_agent; /*!< Websocket user-agent */
char *headers; /*!< Websocket additional headers */
} esp_websocket_client_config_t;
/**
* @brief Start a Websocket session
* This function must be the first function to call,
* and it returns a esp_websocket_client_handle_t that you must use as input to other functions in the interface.
* This call MUST have a corresponding call to esp_websocket_client_destroy when the operation is complete.
*
* @param[in] config The configuration
*
* @return
* - `esp_websocket_client_handle_t`
* - NULL if any errors
*/
esp_websocket_client_handle_t esp_websocket_client_init(const esp_websocket_client_config_t *config);
/**
* @brief Set URL for client, when performing this behavior, the options in the URL will replace the old ones
* Must stop the WebSocket client before set URI if the client has been connected
*
* @param[in] client The client
* @param[in] uri The uri
*
* @return esp_err_t
*/
esp_err_t esp_websocket_client_set_uri(esp_websocket_client_handle_t client, const char *uri);
/**
* @brief Open the WebSocket connection
*
* @param[in] client The client
*
* @return esp_err_t
*/
esp_err_t esp_websocket_client_start(esp_websocket_client_handle_t client);
/**
* @brief Close the WebSocket connection
*
* @param[in] client The client
*
* @return esp_err_t
*/
esp_err_t esp_websocket_client_stop(esp_websocket_client_handle_t client);
/**
* @brief Destroy the WebSocket connection and free all resources.
* This function must be the last function to call for an session.
* It is the opposite of the esp_websocket_client_init function and must be called with the same handle as input that a esp_websocket_client_init call returned.
* This might close all connections this handle has used.
*
* @param[in] client The client
*
* @return esp_err_t
*/
esp_err_t esp_websocket_client_destroy(esp_websocket_client_handle_t client);
/**
* @brief Generic write data to the WebSocket connection; defaults to binary send
*
* @param[in] client The client
* @param[in] data The data
* @param[in] len The length
* @param[in] timeout Write data timeout in RTOS ticks
*
* @return
* - Number of data was sent
* - (-1) if any errors
*/
int esp_websocket_client_send(esp_websocket_client_handle_t client, const char *data, int len, TickType_t timeout);
/**
* @brief Write binary data to the WebSocket connection (data send with WS OPCODE=02, i.e. binary)
*
* @param[in] client The client
* @param[in] data The data
* @param[in] len The length
* @param[in] timeout Write data timeout in RTOS ticks
*
* @return
* - Number of data was sent
* - (-1) if any errors
*/
int esp_websocket_client_send_bin(esp_websocket_client_handle_t client, const char *data, int len, TickType_t timeout);
/**
* @brief Write textual data to the WebSocket connection (data send with WS OPCODE=01, i.e. text)
*
* @param[in] client The client
* @param[in] data The data
* @param[in] len The length
* @param[in] timeout Write data timeout in RTOS ticks
*
* @return
* - Number of data was sent
* - (-1) if any errors
*/
int esp_websocket_client_send_text(esp_websocket_client_handle_t client, const char *data, int len, TickType_t timeout);
/**
* @brief Check the WebSocket connection status
*
* @param[in] client The client handle
*
* @return
* - true
* - false
*/
bool esp_websocket_client_is_connected(esp_websocket_client_handle_t client);
/**
* @brief Register the Websocket Events
*
* @param client The client handle
* @param event The event id
* @param event_handler The callback function
* @param event_handler_arg User context
* @return esp_err_t
*/
esp_err_t esp_websocket_register_events(esp_websocket_client_handle_t client,
esp_websocket_event_id_t event,
esp_event_handler_t event_handler,
void *event_handler_arg);
#ifdef __cplusplus
}
#endif
#endif

90
components/tcp_transport/include/esp_transport_ws.h
View File

@ -13,6 +13,14 @@
extern "C" {
#endif
typedef enum ws_transport_opcodes {
WS_TRANSPORT_OPCODES_CONT = 0x00,
WS_TRANSPORT_OPCODES_TEXT = 0x01,
WS_TRANSPORT_OPCODES_BINARY = 0x02,
WS_TRANSPORT_OPCODES_CLOSE = 0x08,
WS_TRANSPORT_OPCODES_PING = 0x09,
WS_TRANSPORT_OPCODES_PONG = 0x0a,
} ws_transport_opcodes_t;
/**
* @brief Create web socket transport
@ -23,8 +31,90 @@ extern "C" {
*/
esp_transport_handle_t esp_transport_ws_init(esp_transport_handle_t parent_handle);
/**
* @brief Set HTTP path to update protocol to websocket
*
* @param t websocket transport handle
* @param path The HTTP Path
*/
void esp_transport_ws_set_path(esp_transport_handle_t t, const char *path);
/**
* @brief Set websocket sub protocol header
*
* @param t websocket transport handle
* @param sub_protocol Sub protocol string
*
* @return
* - ESP_OK on success
* - One of the error codes
*/
esp_err_t esp_transport_ws_set_subprotocol(esp_transport_handle_t t, const char *sub_protocol);
/**
* @brief Set websocket user-agent header
*
* @param t websocket transport handle
* @param sub_protocol user-agent string
*
* @return
* - ESP_OK on success
* - One of the error codes
*/
esp_err_t esp_transport_ws_set_user_agent(esp_transport_handle_t t, const char *user_agent);
/**
* @brief Set websocket additional headers
*
* @param t websocket transport handle
* @param sub_protocol additional header strings each terminated with \r\n
*
* @return
* - ESP_OK on success
* - One of the error codes
*/
esp_err_t esp_transport_ws_set_headers(esp_transport_handle_t t, const char *headers);
/**
* @brief Sends websocket raw message with custom opcode and payload
*
* Note that generic esp_transport_write for ws handle sends
* binary massages by default if size is > 0 and
* ping message if message size is set to 0.
* This API is provided to support explicit messages with arbitrary opcode,
* should it be PING, PONG or TEXT message with arbitrary data.
*
* @param[in] t Websocket transport handle
* @param[in] opcode ws operation code
* @param[in] buffer The buffer
* @param[in] len The length
* @param[in] timeout_ms The timeout milliseconds (-1 indicates block forever)
*
* @return
* - Number of bytes was written
* - (-1) if there are any errors, should check errno
*/
int esp_transport_ws_send_raw(esp_transport_handle_t t, ws_transport_opcodes_t opcode, const char *b, int len, int timeout_ms);
/**
* @brief Returns websocket op-code for last received data
*
* @param t websocket transport handle
*
* @return
* - Received op-code as enum
*/
ws_transport_opcodes_t esp_transport_ws_get_read_opcode(esp_transport_handle_t t);
/**
* @brief Returns payload length of the last received data
*
* @param t websocket transport handle
*
* @return
* - Number of bytes in the payload
*/
int esp_transport_ws_get_read_payload_len(esp_transport_handle_t t);
#ifdef __cplusplus

318
components/tcp_transport/transport_ws.c
View File

@ -25,18 +25,40 @@ static const char *TAG = "TRANSPORT_WS";
#define WS_MASK 0x80
#define WS_SIZE16 126
#define WS_SIZE64 127
#define MAX_WEBSOCKET_HEADER_SIZE 10
#define MAX_WEBSOCKET_HEADER_SIZE 16
#define WS_RESPONSE_OK 101
typedef struct {
uint8_t opcode;
char mask_key[4]; /*!< Mask key for this payload */
int payload_len; /*!< Total length of the payload */
int bytes_remaining; /*!< Bytes left to read of the payload */
} ws_transport_frame_state_t;
typedef struct {
char *path;
char *buffer;
char *sub_protocol;
char *user_agent;
char *headers;
ws_transport_frame_state_t frame_state;
esp_transport_handle_t parent;
} transport_ws_t;
static inline uint8_t ws_get_bin_opcode(ws_transport_opcodes_t opcode)
{
return (uint8_t)opcode;
}
static esp_transport_handle_t ws_get_payload_transport_handle(esp_transport_handle_t t)
{
transport_ws_t *ws = esp_transport_get_context_data(t);
/* Reading parts of a frame directly will disrupt the WS internal frame state,
reset bytes_remaining to prepare for reading a new frame */
ws->frame_state.bytes_remaining = 0;
return ws->parent;
}
@ -80,7 +102,8 @@ static int ws_connect(esp_transport_handle_t t, const char *host, int port, int
{
transport_ws_t *ws = esp_transport_get_context_data(t);
if (esp_transport_connect(ws->parent, host, port, timeout_ms) < 0) {
ESP_LOGE(TAG, "Error connect to ther server");
ESP_LOGE(TAG, "Error connecting to host %s:%d", host, port);
return -1;
}
unsigned char random_key[16];
@ -89,6 +112,10 @@ static int ws_connect(esp_transport_handle_t t, const char *host, int port, int
// Size of base64 coded string is equal '((input_size * 4) / 3) + (input_size / 96) + 6' including Z-term
unsigned char client_key[28] = {0};
// Default values for backwards compatibility
const char *user_agent_ptr = (ws->user_agent)?(ws->user_agent):"ESP32 Websocket Client";
const char *sub_protocol_ptr = (ws->sub_protocol)?(ws->sub_protocol):"mqtt";
size_t outlen = 0;
mbedtls_base64_encode(client_key, sizeof(client_key), &outlen, random_key, sizeof(random_key));
int len = snprintf(ws->buffer, DEFAULT_WS_BUFFER,
@ -97,25 +124,49 @@ static int ws_connect(esp_transport_handle_t t, const char *host, int port, int
"Host: %s:%d\r\n"
"Upgrade: websocket\r\n"
"Sec-WebSocket-Version: 13\r\n"
"Sec-WebSocket-Protocol: mqtt\r\n"
"Sec-WebSocket-Protocol: %s\r\n"
"Sec-WebSocket-Key: %s\r\n"
"User-Agent: ESP32 Websocket Client\r\n\r\n",
"User-Agent: %s\r\n",
ws->path,
host, port,
client_key);
host, port, sub_protocol_ptr,
client_key, user_agent_ptr);
if (len <= 0 || len >= DEFAULT_WS_BUFFER) {
ESP_LOGE(TAG, "Error in request generation, %d", len);
return -1;
}
if (ws->headers) {
ESP_LOGD(TAG, "headers: %s", ws->headers);
int r = snprintf(ws->buffer + len, DEFAULT_WS_BUFFER - len, "%s", ws->headers);
len += r;
if (r <= 0 || len >= DEFAULT_WS_BUFFER) {
ESP_LOGE(TAG, "Error in request generation"
"(strncpy of headers returned %d, desired request len: %d, buffer size: %d", r, len, DEFAULT_WS_BUFFER);
return -1;
}
}
int r = snprintf(ws->buffer + len, DEFAULT_WS_BUFFER - len, "\r\n");
len += r;
if (r <= 0 || len >= DEFAULT_WS_BUFFER) {
ESP_LOGE(TAG, "Error in request generation"
"(snprintf of header terminal returned %d, desired request len: %d, buffer size: %d", r, len, DEFAULT_WS_BUFFER);
return -1;
}
ESP_LOGD(TAG, "Write upgrate request\r\n%s", ws->buffer);
if (esp_transport_write(ws->parent, ws->buffer, len, timeout_ms) <= 0) {
ESP_LOGE(TAG, "Error write Upgrade header %s", ws->buffer);
return -1;
}
if ((len = esp_transport_read(ws->parent, ws->buffer, DEFAULT_WS_BUFFER, timeout_ms)) <= 0) {
ESP_LOGE(TAG, "Error read response for Upgrade header %s", ws->buffer);
return -1;
}
int header_len = 0;
do {
if ((len = esp_transport_read(ws->parent, ws->buffer + header_len, DEFAULT_WS_BUFFER - header_len, timeout_ms)) <= 0) {
ESP_LOGE(TAG, "Error read response for Upgrade header %s", ws->buffer);
return -1;
}
header_len += len;
ws->buffer[header_len] = '\0';
ESP_LOGD(TAG, "Read header chunk %d, current header size: %d", len, header_len);
} while (NULL == strstr(ws->buffer, "\r\n\r\n") && header_len < DEFAULT_WS_BUFFER);
char *server_key = get_http_header(ws->buffer, "Sec-WebSocket-Accept:");
if (server_key == NULL) {
ESP_LOGE(TAG, "Sec-WebSocket-Accept not found");
@ -144,48 +195,127 @@ static int ws_connect(esp_transport_handle_t t, const char *host, int port, int
return 0;
}
static int ws_write(esp_transport_handle_t t, const char *buff, int len, int timeout_ms)
static int _ws_write(esp_transport_handle_t t, int opcode, int mask_flag, const char *b, int len, int timeout_ms)
{
transport_ws_t *ws = esp_transport_get_context_data(t);
char *buffer = (char *)b;
char ws_header[MAX_WEBSOCKET_HEADER_SIZE];
char *mask;
int header_len = 0, i;
char *buffer = (char *)buff;
int poll_write;
if ((poll_write = esp_transport_poll_write(ws->parent, timeout_ms)) <= 0) {
ESP_LOGE(TAG, "Error transport_poll_write");
return poll_write;
}
ws_header[header_len++] = opcode;
ws_header[header_len++] = WS_OPCODE_BINARY | WS_FIN;
// NOTE: no support for > 16-bit sized messages
if (len > 125) {
ws_header[header_len++] = WS_SIZE16 | WS_MASK;
if (len <= 125) {
ws_header[header_len++] = (uint8_t)(len | mask_flag);
} else if (len < 65536) {
ws_header[header_len++] = WS_SIZE16 | mask_flag;
ws_header[header_len++] = (uint8_t)(len >> 8);
ws_header[header_len++] = (uint8_t)(len & 0xFF);
} else {
ws_header[header_len++] = (uint8_t)(len | WS_MASK);
ws_header[header_len++] = WS_SIZE64 | mask_flag;
/* Support maximum 4 bytes length */
ws_header[header_len++] = 0; //(uint8_t)((len >> 56) & 0xFF);
ws_header[header_len++] = 0; //(uint8_t)((len >> 48) & 0xFF);
ws_header[header_len++] = 0; //(uint8_t)((len >> 40) & 0xFF);
ws_header[header_len++] = 0; //(uint8_t)((len >> 32) & 0xFF);
ws_header[header_len++] = (uint8_t)((len >> 24) & 0xFF);
ws_header[header_len++] = (uint8_t)((len >> 16) & 0xFF);
ws_header[header_len++] = (uint8_t)((len >> 8) & 0xFF);
ws_header[header_len++] = (uint8_t)((len >> 0) & 0xFF);
}
mask = &ws_header[header_len];
getrandom(ws_header + header_len, 4, 0);
header_len += 4;
for (i = 0; i < len; ++i) {
buffer[i] = (buffer[i] ^ mask[i % 4]);
if (mask_flag) {
mask = &ws_header[header_len];
getrandom(ws_header + header_len, 4, 0);
header_len += 4;
for (i = 0; i < len; ++i) {
buffer[i] = (buffer[i] ^ mask[i % 4]);
}
}
if (esp_transport_write(ws->parent, ws_header, header_len, timeout_ms) != header_len) {
ESP_LOGE(TAG, "Error write header");
return -1;
}
return esp_transport_write(ws->parent, buffer, len, timeout_ms);
if (len == 0) {
return 0;
}
int ret = esp_transport_write(ws->parent, buffer, len, timeout_ms);
// in case of masked transport we have to revert back to the original data, as ws layer
// does not create its own copy of data to be sent
if (mask_flag) {
mask = &ws_header[header_len-4];
for (i = 0; i < len; ++i) {
buffer[i] = (buffer[i] ^ mask[i % 4]);
}
}
return ret;
}
static int ws_read(esp_transport_handle_t t, char *buffer, int len, int timeout_ms)
int esp_transport_ws_send_raw(esp_transport_handle_t t, ws_transport_opcodes_t opcode, const char *b, int len, int timeout_ms)
{
uint8_t op_code = ws_get_bin_opcode(opcode);
if (t == NULL) {
ESP_LOGE(TAG, "Transport must be a valid ws handle");
return ESP_ERR_INVALID_ARG;
}
ESP_LOGD(TAG, "Sending raw ws message with opcode %d", op_code);
return _ws_write(t, op_code | WS_FIN, WS_MASK, b, len, timeout_ms);
}
static int ws_write(esp_transport_handle_t t, const char *b, int len, int timeout_ms)
{
return _ws_write(t, WS_OPCODE_BINARY | WS_FIN, WS_MASK, b, len, timeout_ms);
}
static int ws_read_payload(esp_transport_handle_t t, char *buffer, int len, int timeout_ms)
{
transport_ws_t *ws = esp_transport_get_context_data(t);
int bytes_to_read;
int rlen = 0;
if (ws->frame_state.bytes_remaining > len) {
ESP_LOGD(TAG, "Actual data to receive (%d) are longer than ws buffer (%d)", ws->frame_state.bytes_remaining, len);
bytes_to_read = len;
} else {
bytes_to_read = ws->frame_state.bytes_remaining;
}
// Receive and process payload
if (bytes_to_read != 0 && (rlen = esp_transport_read(ws->parent, buffer, bytes_to_read, timeout_ms)) <= 0) {
ESP_LOGE(TAG, "Error read data");
return rlen;
}
ws->frame_state.bytes_remaining -= rlen;
if (ws->frame_state.mask_key) {
for (int i = 0; i < bytes_to_read; i++) {
buffer[i] = (buffer[i] ^ ws->frame_state.mask_key[i % 4]);
}
}
return rlen;
}
/* Read and parse the WS header, determine length of payload */
static int ws_read_header(esp_transport_handle_t t, char *buffer, int len, int timeout_ms)
{
transport_ws_t *ws = esp_transport_get_context_data(t);
int payload_len;
char ws_header[MAX_WEBSOCKET_HEADER_SIZE];
char *data_ptr = ws_header, opcode, mask, *mask_key = NULL;
char *data_ptr = ws_header, mask;
int rlen;
int poll_read;
if ((poll_read = esp_transport_poll_read(ws->parent, timeout_ms)) <= 0) {
@ -194,16 +324,17 @@ static int ws_read(esp_transport_handle_t t, char *buffer, int len, int timeout_
// Receive and process header first (based on header size)
int header = 2;
int mask_len = 4;
if ((rlen = esp_transport_read(ws->parent, data_ptr, header, timeout_ms)) <= 0) {
ESP_LOGE(TAG, "Error read data");
return rlen;
}
opcode = (*data_ptr & 0x0F);
ws->frame_state.opcode = (*data_ptr & 0x0F);
data_ptr ++;
mask = ((*data_ptr >> 7) & 0x01);
payload_len = (*data_ptr & 0x7F);
data_ptr++;
ESP_LOGD(TAG, "Opcode: %d, mask: %d, len: %d\r\n", opcode, mask, payload_len);
ESP_LOGD(TAG, "Opcode: %d, mask: %d, len: %d\r\n", ws->frame_state.opcode, mask, payload_len);
if (payload_len == 126) {
// headerLen += 2;
if ((rlen = esp_transport_read(ws->parent, data_ptr, header, timeout_ms)) <= 0) {
@ -227,27 +358,48 @@ static int ws_read(esp_transport_handle_t t, char *buffer, int len, int timeout_
}
}
if (payload_len > len) {
ESP_LOGD(TAG, "Actual data to receive (%d) are longer than ws buffer (%d)", payload_len, len);
payload_len = len;
}
// Then receive and process payload
if ((rlen = esp_transport_read(ws->parent, buffer, payload_len, timeout_ms)) <= 0) {
ESP_LOGE(TAG, "Error read data");
return rlen;
}
if (mask) {
mask_key = buffer;
data_ptr = buffer + 4;
for (int i = 0; i < payload_len; i++) {
buffer[i] = (data_ptr[i] ^ mask_key[i % 4]);
// Read and store mask
if (payload_len != 0 && (rlen = esp_transport_read(ws->parent, buffer, mask_len, timeout_ms)) <= 0) {
ESP_LOGE(TAG, "Error read data");
return rlen;
}
memcpy(ws->frame_state.mask_key, buffer, mask_len);
} else {
memset(ws->frame_state.mask_key, 0, mask_len);
}
ws->frame_state.payload_len = payload_len;
ws->frame_state.bytes_remaining = payload_len;
return payload_len;
}
static int ws_read(esp_transport_handle_t t, char *buffer, int len, int timeout_ms)
{
int rlen = 0;
transport_ws_t *ws = esp_transport_get_context_data(t);
// If message exceeds buffer len then subsequent reads will skip reading header and read whatever is left of the payload
if (ws->frame_state.bytes_remaining <= 0) {
if ( (rlen = ws_read_header(t, buffer, len, timeout_ms)) <= 0) {
// If something when wrong then we prepare for reading a new header
ws->frame_state.bytes_remaining = 0;
return rlen;
}
}
if (ws->frame_state.payload_len) {
if ( (rlen = ws_read_payload(t, buffer, len, timeout_ms)) <= 0) {
ESP_LOGE(TAG, "Error reading payload data");
ws->frame_state.bytes_remaining = 0;
return rlen;
}
}
return rlen;
}
static int ws_poll_read(esp_transport_handle_t t, int timeout_ms)
{
transport_ws_t *ws = esp_transport_get_context_data(t);
@ -271,6 +423,9 @@ static esp_err_t ws_destroy(esp_transport_handle_t t)
transport_ws_t *ws = esp_transport_get_context_data(t);
free(ws->buffer);
free(ws->path);
free(ws->sub_protocol);
free(ws->user_agent);
free(ws->headers);
free(ws);
return 0;
}
@ -280,6 +435,7 @@ void esp_transport_ws_set_path(esp_transport_handle_t t, const char *path)
ws->path = realloc(ws->path, strlen(path) + 1);
strcpy(ws->path, path);
}
esp_transport_handle_t esp_transport_ws_init(esp_transport_handle_t parent_handle)
{
esp_transport_handle_t t = esp_transport_init();
@ -288,7 +444,10 @@ esp_transport_handle_t esp_transport_ws_init(esp_transport_handle_t parent_handl
ws->parent = parent_handle;
ws->path = strdup("/");
ESP_TRANSPORT_MEM_CHECK(TAG, ws->path, return NULL);
ESP_TRANSPORT_MEM_CHECK(TAG, ws->path, {
free(ws);
return NULL;
});
ws->buffer = malloc(DEFAULT_WS_BUFFER);
ESP_TRANSPORT_MEM_CHECK(TAG, ws->buffer, {
free(ws->path);
@ -304,3 +463,74 @@ esp_transport_handle_t esp_transport_ws_init(esp_transport_handle_t parent_handl
return t;
}
esp_err_t esp_transport_ws_set_subprotocol(esp_transport_handle_t t, const char *sub_protocol)
{
if (t == NULL) {
return ESP_ERR_INVALID_ARG;
}
transport_ws_t *ws = esp_transport_get_context_data(t);
if (ws->sub_protocol) {
free(ws->sub_protocol);
}
if (sub_protocol == NULL) {
ws->sub_protocol = NULL;
return ESP_OK;
}
ws->sub_protocol = strdup(sub_protocol);
if (ws->sub_protocol == NULL) {
return ESP_ERR_NO_MEM;
}
return ESP_OK;
}
esp_err_t esp_transport_ws_set_user_agent(esp_transport_handle_t t, const char *user_agent)
{
if (t == NULL) {
return ESP_ERR_INVALID_ARG;
}
transport_ws_t *ws = esp_transport_get_context_data(t);
if (ws->user_agent) {
free(ws->user_agent);
}
if (user_agent == NULL) {
ws->user_agent = NULL;
return ESP_OK;
}
ws->user_agent = strdup(user_agent);
if (ws->user_agent == NULL) {
return ESP_ERR_NO_MEM;
}
return ESP_OK;
}
esp_err_t esp_transport_ws_set_headers(esp_transport_handle_t t, const char *headers)
{
if (t == NULL) {
return ESP_ERR_INVALID_ARG;
}
transport_ws_t *ws = esp_transport_get_context_data(t);
if (ws->headers) {
free(ws->headers);
}
if (headers == NULL) {
ws->headers = NULL;
return ESP_OK;
}
ws->headers = strdup(headers);
if (ws->headers == NULL) {
return ESP_ERR_NO_MEM;
}
return ESP_OK;
}
ws_transport_opcodes_t esp_transport_ws_get_read_opcode(esp_transport_handle_t t)
{
transport_ws_t *ws = esp_transport_get_context_data(t);
return ws->frame_state.opcode;
}
int esp_transport_ws_get_read_payload_len(esp_transport_handle_t t)
{
transport_ws_t *ws = esp_transport_get_context_data(t);
return ws->frame_state.payload_len;
}

2
docs/Doxyfile
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@ -118,6 +118,8 @@ INPUT = \
../../components/esp_http_client/include/esp_http_client.h \
../../components/esp_http_server/include/esp_http_server.h \
../../components/esp_https_server/include/esp_https_server.h \
## Websocket Client
../../components/esp_websocket_client/include/esp_websocket_client.h \
##
## Provisioning - API Reference
##

70
docs/en/api-reference/protocols/esp_websocket_client.rst Normal file
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@ -0,0 +1,70 @@
ESP WebSocket Client
====================
Overview
--------
The ESP WebSocket client is an implementation of `WebSocket protocol client <https://tools.ietf.org/html/rfc6455>`_ for ESP32
Features
--------
* supports WebSocket over TCP, SSL with mbedtls
* Easy to setup with URI
* Multiple instances (Multiple clients in one application)
Configuration
-------------
URI
^^^
- Supports ``ws``, ``wss`` schemes
- WebSocket samples:
- ``ws://websocket.org``: WebSocket over TCP, default port 80
- ``wss://websocket.org``: WebSocket over SSL, default port 443
- Minimal configurations:
.. code:: c
const esp_websocket_client_config_t ws_cfg = {
.uri = "ws://websocket.org",
};
- If there are any options related to the URI in
``esp_websocket_client_config_t``, the option defined by the URI will be
overridden. Sample:
.. code:: c
const esp_websocket_client_config_t ws_cfg = {
.uri = "ws://websocket.org:123",
.port = 4567,
};
//WebSocket client will connect to websocket.org using port 4567
SSL
^^^
- Get certificate from server, example: ``websocket.org``
``openssl s_client -showcerts -connect websocket.org:443 </dev/null 2>/dev/null|openssl x509 -outform PEM >websocket_org.pem``
- Configuration:
.. code:: cpp
const esp_websocket_client_config_t ws_cfg = {
.uri = "wss://websocket.org",
.cert_pem = (const char *)websocket_org_pem_start,
};
For more options on ``esp_websocket_client_config_t``, please refer to API reference below
Application Example
-------------------
Simple WebSocket example that uses esp_websocket_client to establish a websocket connection and send/receive data with the `websocket.org <https://websocket.org>`_ Server: :example:`protocols/websocket`.
API Reference
-------------
.. include:: /_build/inc/esp_websocket_client.inc

1
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@ -12,6 +12,7 @@ Application Protocols
ASIO <asio>
ESP-MQTT <mqtt>
Modbus slave <modbus>
Websocket Client <esp_websocket_client>
Example code for this API section is provided in :example:`protocols` directory of ESP-IDF examples.

1
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@ -0,0 +1 @@
.. include:: ../../../en/api-reference/protocols/esp_websocket_client.rst

7
examples/protocols/websocket/CMakeLists.txt Normal file
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@ -0,0 +1,7 @@
# The following four lines of boilerplate have to be in your project's CMakeLists
# in this exact order for cmake to work correctly
cmake_minimum_required(VERSION 3.5)
include($ENV{IDF_PATH}/tools/cmake/project.cmake)
project(websocket-example)

8
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@ -0,0 +1,8 @@
#
# This is a project Makefile. It is assumed the directory this Makefile resides in is a
# project subdirectory.
#
PROJECT_NAME := websocket-example
include $(IDF_PATH)/make/project.mk

56
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@ -0,0 +1,56 @@
# Websocket Sample application
(See the README.md file in the upper level 'examples' directory for more information about examples.)
This example will shows how to set up and communicate over a websocket.
## How to Use Example
### Hardware Required
This example can be executed on any ESP32 board, the only required interface is WiFi and connection to internet or a local server.
### Configure the project
```
make menuconfig
```
* Set serial port under Serial Flasher Options.
* Set ssid and password for the board to connect to AP.
### Build and Flash
Build the project and flash it to the board, then run monitor tool to view serial output:
```
make -j4 flash monitor
```
(To exit the serial monitor, type ``Ctrl-]``.)
See the Getting Started Guide for full steps to configure and use ESP-IDF to build projects.
## Example Output
```
I (4482) WEBSOCKET: Connecting to ws://echo.websocket.org...
I (5012) WEBSOCKET: WEBSOCKET_EVENT_CONNECTED
I (5492) WEBSOCKET: Sending hello 0000
I (6052) WEBSOCKET: WEBSOCKET_EVENT_DATA
W (6052) WEBSOCKET: Received=hello 0000
I (6492) WEBSOCKET: Sending hello 0001
I (7052) WEBSOCKET: WEBSOCKET_EVENT_DATA
W (7052) WEBSOCKET: Received=hello 0001
I (7492) WEBSOCKET: Sending hello 0002
I (8082) WEBSOCKET: WEBSOCKET_EVENT_DATA
W (8082) WEBSOCKET: Received=hello 0002
I (8492) WEBSOCKET: Sending hello 0003
I (9152) WEBSOCKET: WEBSOCKET_EVENT_DATA
W (9162) WEBSOCKET: Received=hello 0003
```

268
examples/protocols/websocket/example_test.py Normal file
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@ -0,0 +1,268 @@
from __future__ import print_function
from __future__ import unicode_literals
import re
import os
import sys
import socket
import select
import hashlib
import base64
import queue
import random
import string
from threading import Thread, Event
try:
import IDF
except Exception:
# this is a test case write with tiny-test-fw.
# to run test cases outside tiny-test-fw,
# we need to set environment variable `TEST_FW_PATH`,
# then get and insert `TEST_FW_PATH` to sys path before import FW module
test_fw_path = os.getenv("TEST_FW_PATH")
if test_fw_path and test_fw_path not in sys.path:
sys.path.insert(0, test_fw_path)
import IDF
def get_my_ip():
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
try:
# doesn't even have to be reachable
s.connect(('10.255.255.255', 1))
IP = s.getsockname()[0]
except Exception:
IP = '127.0.0.1'
finally:
s.close()
return IP
# Simple Websocket server for testing purposes
class Websocket:
HEADER_LEN = 6
def __init__(self, port):
self.port = port
self.socket = socket.socket()
self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
self.socket.settimeout(10.0)
self.send_q = queue.Queue()
self.shutdown = Event()
def __enter__(self):
try:
self.socket.bind(('', self.port))
except socket.error as e:
print("Bind failed:{}".format(e))
raise
self.socket.listen(1)
self.server_thread = Thread(target=self.run_server)
self.server_thread.start()
return self
def __exit__(self, exc_type, exc_value, traceback):
self.shutdown.set()
self.server_thread.join()
self.socket.close()
self.conn.close()
def run_server(self):
self.conn, address = self.socket.accept() # accept new connection
self.socket.settimeout(10.0)
print("Connection from: {}".format(address))
self.establish_connection()
print("WS established")
# Handle connection until client closes it, will echo any data received and send data from send_q queue
self.handle_conn()
def establish_connection(self):
while not self.shutdown.is_set():
try:
# receive data stream. it won't accept data packet greater than 1024 bytes
data = self.conn.recv(1024).decode()
if not data:
# exit if data is not received
raise
if "Upgrade: websocket" in data and "Connection: Upgrade" in data:
self.handshake(data)
return
except socket.error as err:
print("Unable to establish a websocket connection: {}, {}".format(err))
raise
def handshake(self, data):
# Magic string from RFC
MAGIC_STRING = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"
headers = data.split("\r\n")
for header in headers:
if "Sec-WebSocket-Key" in header:
client_key = header.split()[1]
if client_key:
resp_key = client_key + MAGIC_STRING
resp_key = base64.standard_b64encode(hashlib.sha1(resp_key.encode()).digest())
resp = "HTTP/1.1 101 Switching Protocols\r\n" + \
"Upgrade: websocket\r\n" + \
"Connection: Upgrade\r\n" + \
"Sec-WebSocket-Accept: {}\r\n\r\n".format(resp_key.decode())
self.conn.send(resp.encode())
def handle_conn(self):
while not self.shutdown.is_set():
r,w,e = select.select([self.conn], [], [], 1)
try:
if self.conn in r:
self.echo_data()
if not self.send_q.empty():
self._send_data_(self.send_q.get())
except socket.error as err:
print("Stopped echoing data: {}".format(err))
raise
def echo_data(self):
header = bytearray(self.conn.recv(self.HEADER_LEN, socket.MSG_WAITALL))
if not header:
# exit if socket closed by peer
return
# Remove mask bit
payload_len = ~(1 << 7) & header[1]
payload = bytearray(self.conn.recv(payload_len, socket.MSG_WAITALL))
if not payload:
# exit if socket closed by peer
return
frame = header + payload
decoded_payload = self.decode_frame(frame)
print("Sending echo...")
self._send_data_(decoded_payload)
def _send_data_(self, data):
frame = self.encode_frame(data)
self.conn.send(frame)
def send_data(self, data):
self.send_q.put(data.encode())
def decode_frame(self, frame):
# Mask out MASK bit from payload length, this len is only valid for short messages (<126)
payload_len = ~(1 << 7) & frame[1]
mask = frame[2:self.HEADER_LEN]
encrypted_payload = frame[self.HEADER_LEN:self.HEADER_LEN + payload_len]
payload = bytearray()
for i in range(payload_len):
payload.append(encrypted_payload[i] ^ mask[i % 4])
return payload
def encode_frame(self, payload):
# Set FIN = 1 and OP_CODE = 1 (text)
header = (1 << 7) | (1 << 0)
frame = bytearray([header])
payload_len = len(payload)
# If payload len is longer than 125 then the next 16 bits are used to encode length
if payload_len > 125:
frame.append(126)
frame.append(payload_len >> 8)
frame.append(0xFF & payload_len)
else:
frame.append(payload_len)
frame += payload
return frame
def test_echo(dut):
dut.expect("WEBSOCKET_EVENT_CONNECTED")
for i in range(0, 10):
dut.expect(re.compile(r"Received=hello (\d)"), timeout=30)
print("All echos received")
def test_recv_long_msg(dut, websocket, msg_len, repeats):
send_msg = ''.join(random.choice(string.ascii_uppercase + string.ascii_lowercase + string.digits) for _ in range(msg_len))
for _ in range(repeats):
websocket.send_data(send_msg)
recv_msg = ''
while len(recv_msg) < msg_len:
# Filter out color encoding
match = dut.expect(re.compile(r"Received=([a-zA-Z0-9]*).*\n"), timeout=30)[0]
recv_msg += match
if recv_msg == send_msg:
print("Sent message and received message are equal")
else:
raise ValueError("DUT received string do not match sent string, \nexpected: {}\nwith length {}\
\nreceived: {}\nwith length {}".format(send_msg, len(send_msg), recv_msg, len(recv_msg)))
@IDF.idf_example_test(env_tag="Example_WIFI")
def test_examples_protocol_websocket(env, extra_data):
"""
steps:
1. join AP
2. connect to uri specified in the config
3. send and receive data
"""
dut1 = env.get_dut("websocket", "examples/protocols/websocket")
# check and log bin size
binary_file = os.path.join(dut1.app.binary_path, "websocket-example.bin")
bin_size = os.path.getsize(binary_file)
IDF.log_performance("websocket_bin_size", "{}KB".format(bin_size // 1024))
IDF.check_performance("websocket_bin_size", bin_size // 1024)
try:
if "CONFIG_WEBSOCKET_URI_FROM_STDIN" in dut1.app.get_sdkconfig():
uri_from_stdin = True
else:
uri = dut1.app.get_sdkconfig()["CONFIG_WEBSOCKET_URI"].strip('"')
uri_from_stdin = False
except Exception:
print('ENV_TEST_FAILURE: Cannot find uri settings in sdkconfig')
raise
# start test
dut1.start_app()
if uri_from_stdin:
server_port = 4455
with Websocket(server_port) as ws:
uri = "ws://{}:{}".format(get_my_ip(), server_port)
print("DUT connecting to {}".format(uri))
dut1.expect("Please enter uri of websocket endpoint", timeout=30)
dut1.write(uri)
test_echo(dut1)
# Message length should exceed DUT's buffer size to test fragmentation, default is 1024 byte
test_recv_long_msg(dut1, ws, 2000, 3)
else:
print("DUT connecting to {}".format(uri))
test_echo(dut1)
if __name__ == '__main__':
test_examples_protocol_websocket()

4
examples/protocols/websocket/main/CMakeLists.txt Normal file
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@ -0,0 +1,4 @@
set(COMPONENT_SRCS "websocket_example.c")
set(COMPONENT_ADD_INCLUDEDIRS ".")
register_component()

35
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@ -0,0 +1,35 @@
menu "Example Configuration"
config WIFI_SSID
string "WiFi SSID"
default "myssid"
help
SSID (network name) for the example to connect to.
config WIFI_PASSWORD
string "WiFi Password"
default "mypassword"
help
WiFi password (WPA or WPA2) for the example to use.
choice WEBSOCKET_URI_SOURCE
prompt "Websocket URI source"
default WEBSOCKET_URI_FROM_STRING
help
Selects the source of the URI used in the example.
config WEBSOCKET_URI_FROM_STRING
bool "From string"
config WEBSOCKET_URI_FROM_STDIN
bool "From stdin"
endchoice
config WEBSOCKET_URI
string "Websocket endpoint URI"
depends on WEBSOCKET_URI_FROM_STRING
default "ws://echo.websocket.org"
help
URL of websocket endpoint this example connects to and sends echo
endmenu

0
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187
examples/protocols/websocket/main/websocket_example.c Normal file
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@ -0,0 +1,187 @@
/* ESP HTTP Client 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 <stdio.h>
#include "esp_wifi.h"
#include "esp_system.h"
#include "nvs_flash.h"
#include "esp_event_loop.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/semphr.h"
#include "freertos/event_groups.h"
#include "esp_log.h"
#include "esp_websocket_client.h"
#include "esp_event.h"
#define NO_DATA_TIMEOUT_SEC 10
static const char *TAG = "WEBSOCKET";
static EventGroupHandle_t wifi_event_group;
const static int CONNECTED_BIT = BIT0;
static TimerHandle_t shutdown_signal_timer;
static SemaphoreHandle_t shutdown_sema;
static void shutdown_signaler(TimerHandle_t xTimer)
{
ESP_LOGI(TAG, "No data received for %d seconds, signaling shutdown", NO_DATA_TIMEOUT_SEC);
xSemaphoreGive(shutdown_sema);
}
#if CONFIG_WEBSOCKET_URI_FROM_STDIN
static void get_string(char *line, size_t size)
{
int count = 0;
while (count < size) {
int c = fgetc(stdin);
if (c == '\n') {
line[count] = '\0';
break;
} else if (c > 0 && c < 127) {
line[count] = c;
++count;
}
vTaskDelay(10 / portTICK_PERIOD_MS);
}
}
#endif /* CONFIG_WEBSOCKET_URI_FROM_STDIN */
static void websocket_event_handler(void *handler_args, esp_event_base_t base, int32_t event_id, void *event_data)
{
esp_websocket_event_data_t *data = (esp_websocket_event_data_t *)event_data;
switch (event_id) {
case WEBSOCKET_EVENT_CONNECTED:
ESP_LOGI(TAG, "WEBSOCKET_EVENT_CONNECTED");
break;
case WEBSOCKET_EVENT_DISCONNECTED:
ESP_LOGI(TAG, "WEBSOCKET_EVENT_DISCONNECTED");
break;
case WEBSOCKET_EVENT_DATA:
ESP_LOGI(TAG, "WEBSOCKET_EVENT_DATA");
ESP_LOGI(TAG, "Received opcode=%d", data->op_code);
ESP_LOGW(TAG, "Received=%.*s", data->data_len, (char *)data->data_ptr);
ESP_LOGW(TAG, "Total payload length=%d, data_len=%d, current payload offset=%d\r\n", data->payload_len, data->data_len, data->payload_offset);
xTimerReset(shutdown_signal_timer, portMAX_DELAY);
break;
case WEBSOCKET_EVENT_ERROR:
ESP_LOGI(TAG, "WEBSOCKET_EVENT_ERROR");
break;
}
}
static esp_err_t wifi_event_handler(void *ctx, system_event_t *event)
{
switch (event->event_id) {
case SYSTEM_EVENT_STA_START:
esp_wifi_connect();
break;
case SYSTEM_EVENT_STA_GOT_IP:
xEventGroupSetBits(wifi_event_group, CONNECTED_BIT);
break;
case SYSTEM_EVENT_STA_DISCONNECTED:
esp_wifi_connect();
xEventGroupClearBits(wifi_event_group, CONNECTED_BIT);
break;
default:
break;
}
return ESP_OK;
}
static void wifi_init(void)
{
tcpip_adapter_init();
wifi_event_group = xEventGroupCreate();
ESP_ERROR_CHECK(esp_event_loop_init(wifi_event_handler, NULL));
wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
ESP_ERROR_CHECK(esp_wifi_init(&cfg));
ESP_ERROR_CHECK(esp_wifi_set_storage(WIFI_STORAGE_RAM));
wifi_config_t wifi_config = {
.sta = {
.ssid = CONFIG_WIFI_SSID,
.password = CONFIG_WIFI_PASSWORD,
},
};
ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));
ESP_ERROR_CHECK(esp_wifi_set_config(ESP_IF_WIFI_STA, &wifi_config));
ESP_LOGI(TAG, "start the WIFI SSID:[%s]", CONFIG_WIFI_SSID);
ESP_ERROR_CHECK(esp_wifi_start());
ESP_LOGI(TAG, "Waiting for wifi");
xEventGroupWaitBits(wifi_event_group, CONNECTED_BIT, false, true, portMAX_DELAY);
}
static void websocket_app_start(void)
{
esp_websocket_client_config_t websocket_cfg = {};
shutdown_signal_timer = xTimerCreate("Websocket shutdown timer", NO_DATA_TIMEOUT_SEC * 1000 / portTICK_PERIOD_MS,
pdFALSE, NULL, shutdown_signaler);
shutdown_sema = xSemaphoreCreateBinary();
#if CONFIG_WEBSOCKET_URI_FROM_STDIN
char line[128];
ESP_LOGI(TAG, "Please enter uri of websocket endpoint");
get_string(line, sizeof(line));
websocket_cfg.uri = line;
ESP_LOGI(TAG, "Endpoint uri: %s\n", line);
#else
websocket_cfg.uri = CONFIG_WEBSOCKET_URI;
#endif /* CONFIG_WEBSOCKET_URI_FROM_STDIN */
ESP_LOGI(TAG, "Connecting to %s...", websocket_cfg.uri);
esp_websocket_client_handle_t client = esp_websocket_client_init(&websocket_cfg);
esp_websocket_register_events(client, WEBSOCKET_EVENT_ANY, websocket_event_handler, (void *)client);
esp_websocket_client_start(client);
xTimerStart(shutdown_signal_timer, portMAX_DELAY);
char data[32];
int i = 0;
while (i < 10) {
if (esp_websocket_client_is_connected(client)) {
int len = sprintf(data, "hello %04d", i++);
ESP_LOGI(TAG, "Sending %s", data);
esp_websocket_client_send(client, data, len, portMAX_DELAY);
}
vTaskDelay(1000 / portTICK_RATE_MS);
}
xSemaphoreTake(shutdown_sema, portMAX_DELAY);
esp_websocket_client_stop(client);
ESP_LOGI(TAG, "Websocket Stopped");
esp_websocket_client_destroy(client);
}
void app_main(void)
{
ESP_LOGI(TAG, "[APP] Startup..");
ESP_LOGI(TAG, "[APP] Free memory: %d bytes", esp_get_free_heap_size());
ESP_LOGI(TAG, "[APP] IDF version: %s", esp_get_idf_version());
esp_log_level_set("*", ESP_LOG_INFO);
esp_log_level_set("WEBSOCKET_CLIENT", ESP_LOG_DEBUG);
esp_log_level_set("TRANS_TCP", ESP_LOG_DEBUG);
nvs_flash_init();
wifi_init();
websocket_app_start();
}

3
examples/protocols/websocket/sdkconfig.ci Normal file
View File

@ -0,0 +1,3 @@
CONFIG_WEBSOCKET_URI_FROM_STDIN=y
CONFIG_WEBSOCKET_URI_FROM_STRING=n