diff --git a/esp_modem/.doctrees/environment.pickle b/esp_modem/.doctrees/environment.pickle index 65d3c35d5..847dca4cb 100644 Binary files a/esp_modem/.doctrees/environment.pickle and b/esp_modem/.doctrees/environment.pickle differ diff --git a/esp_websocket_client/.buildinfo b/esp_websocket_client/.buildinfo new file mode 100644 index 000000000..6a1615890 --- /dev/null +++ b/esp_websocket_client/.buildinfo @@ -0,0 +1,4 @@ +# Sphinx build info version 1 +# This file hashes the configuration used when building these files. When it is not found, a full rebuild will be done. +config: a301951143c10d4b674813ceac5980d8 +tags: 549b3d6d0415232fb7e35403b330ff49 diff --git a/esp_websocket_client/_sources/index.rst.txt b/esp_websocket_client/_sources/index.rst.txt new file mode 100644 index 000000000..7c3abd970 --- /dev/null +++ b/esp_websocket_client/_sources/index.rst.txt @@ -0,0 +1,127 @@ +ESP WebSocket Client +==================== + +Overview +-------- +The ESP WebSocket client is an implementation of `WebSocket protocol client `_ for {IDF_TARGET_NAME} + +Features +-------- + * Supports WebSocket over TCP, TLS with mbedtls + * Easy to setup with URI + * Multiple instances (Multiple clients in one application) + +Configuration +------------- +URI +^^^ + +- Supports ``ws``, ``wss`` schemes +- WebSocket samples: + + - ``ws://echo.websocket.org``: WebSocket over TCP, default port 80 + - ``wss://echo.websocket.org``: WebSocket over SSL, default port 443 + +Minimal configurations: + +.. code:: c + + const esp_websocket_client_config_t ws_cfg = { + .uri = "ws://echo.websocket.org", + }; + +The WebSocket client supports the use of both path and query in the URI. Sample: + +.. code:: c + + const esp_websocket_client_config_t ws_cfg = { + .uri = "ws://echo.websocket.org/connectionhandler?id=104", + }; + + +If there are any options related to the URI in +:cpp:type:`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://echo.websocket.org:123", + .port = 4567, + }; + //WebSocket client will connect to websocket.org using port 4567 + +TLS +^^^ + +Configuration: + +.. code:: c + + const esp_websocket_client_config_t ws_cfg = { + .uri = "wss://echo.websocket.org", + .cert_pem = (const char *)websocket_org_pem_start, + }; + +.. note:: If you want to verify the server, then you need to provide a certificate in PEM format, and provide to ``cert_pem`` in :cpp:type:`websocket_client_config_t`. If no certficate is provided then the TLS connection will default to not requiring verification. + +PEM certificate for this example could be extracted from an openssl `s_client` command connecting to websocket.org. +In case a host operating system has `openssl` and `sed` packages installed, one could execute the following command to download and save the root or intermediate root certificate to a file (Note for Windows users: Both Linux like environment or Windows native packages may be used). +``` +echo "" | openssl s_client -showcerts -connect websocket.org:443 | sed -n "1,/Root/d; /BEGIN/,/END/p" | openssl x509 -outform PEM >websocket_org.pem +``` + +This command will extract the second certificate in the chain and save it as a pem-file. + +Subprotocol +^^^^^^^^^^^ + +The subprotocol field in the config struct can be used to request a subprotocol + +.. code:: c + + const esp_websocket_client_config_t ws_cfg = { + .uri = "ws://websocket.org", + .subprotocol = "soap", + }; + +.. note:: The client is indifferent to the subprotocol field in the server response and will accept the connection no matter what the server replies. + +For more options on :cpp:type:`esp_websocket_client_config_t`, please refer to API reference below + +Events +------ +* `WEBSOCKET_EVENT_CONNECTED`: The client has successfully established a connection to the server. The client is now ready to send and receive data. Contains no event data. +* `WEBSOCKET_EVENT_DISCONNECTED`: The client has aborted the connection due to the transport layer failing to read data, e.g. because the server is unavailable. Contains no event data. +* `WEBSOCKET_EVENT_DATA`: The client has successfully received and parsed a WebSocket frame. The event data contains a pointer to the payload data, the length of the payload data as well as the opcode of the received frame. A message may be fragmented into multiple events if the length exceeds the buffer size. This event will also be posted for non-payload frames, e.g. pong or connection close frames. +* `WEBSOCKET_EVENT_ERROR`: Not used in the current implementation of the client. + +If the client handle is needed in the event handler it can be accessed through the pointer passed to the event handler: + +.. code:: c + + esp_websocket_client_handle_t client = (esp_websocket_client_handle_t)handler_args; + + +Limitations and Known Issues +---------------------------- +* The client is able to request the use of a subprotocol from the server during the handshake, but does not do any subprotocol related checks on the response from the server. + +Application Example +------------------- +A simple WebSocket example that uses esp_websocket_client to establish a websocket connection and send/receive data with the `websocket.org `_ server can be found here: :example:`example <../examples>`. + +Sending Text Data +^^^^^^^^^^^^^^^^^ +The WebSocket client supports sending data as a text data frame, which informs the application layer that the payload data is text data encoded as UTF-8. Example: + +.. code:: cpp + + esp_websocket_client_send_text(client, data, len, portMAX_DELAY); + + +API Reference +------------- + +.. include-build-file:: inc/esp_websocket_client.inc + diff --git a/esp_websocket_client/_static/DejaVuSans.ttf b/esp_websocket_client/_static/DejaVuSans.ttf new file mode 100644 index 000000000..19ed0b468 Binary files /dev/null and b/esp_websocket_client/_static/DejaVuSans.ttf differ diff --git a/esp_websocket_client/_static/NotoSansSC-Regular.otf b/esp_websocket_client/_static/NotoSansSC-Regular.otf new file mode 100644 index 000000000..7cd0b77ae Binary files /dev/null and b/esp_websocket_client/_static/NotoSansSC-Regular.otf differ diff --git a/esp_websocket_client/_static/basic.css b/esp_websocket_client/_static/basic.css new file mode 100644 index 000000000..bf18350b6 --- /dev/null +++ b/esp_websocket_client/_static/basic.css @@ -0,0 +1,906 @@ +/* + * basic.css + * ~~~~~~~~~ + * + * Sphinx stylesheet -- basic theme. + * + * :copyright: Copyright 2007-2022 by the Sphinx team, see AUTHORS. + * :license: BSD, see LICENSE for details. + * + */ + +/* -- main layout ----------------------------------------------------------- */ + +div.clearer { + clear: both; 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