WebSocket Client
Overview
This sample application implements a Websocket client that will do an HTTP or HTTPS handshake request to HTTP server, then start to send data and wait for the responses from the Websocket server.
The source code for this sample application can be found at: samples/net/sockets/websocket_client.
Requirements
Building and Running
You can use this application on a supported board, including running it inside QEMU as described in Networking with QEMU.
Build websocket-client sample application like this:
west build -b <board to use> samples/net/sockets/websocket_client -- -DCONF_FILE=<config file to use>
Enabling TLS support
Enable TLS support in the sample by building the project with the
overlay-tls.conf overlay file enabled using these commands:
west build -b qemu_x86 samples/net/sockets/websocket_client -- -DCONF_FILE="prj.conf overlay-tls.conf"
An alternative way is to specify -DEXTRA_CONF_FILE=overlay-tls.conf when
running west build or cmake.
The certificate and private key used by the sample can be found in the sample’s samples/net/sockets/websocket_client/src/ directory.
Running websocket-server in Linux Host
You can run this websocket-client sample application in QEMU
and run the zephyr-websocket-server.py (from net-tools) on a Linux host.
Other alternative is to install websocketd and
use that.
To use QEMU for testing, follow the Networking with QEMU guide.
In a terminal window you can do either:
$ ./zephyr-websocket-server.py
or
$ websocketd --port=9001 cat
Run websocket-client application in QEMU:
west build -b qemu_x86 samples/net/sockets/websocket_client -- -DCONF_FILE=prj.conf
west build -t run
Note that zephyr-websocket-server.py or websocketd must be running in
the Linux host terminal window before you start the websocket-client
application in QEMU. Exit QEMU by pressing CTRL+A x.
Current version of zephyr-websocket-server.py found in
net-tools project, does
not support TLS.