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This builds on the new dbus role support to provide a minimal example proxy between ws and dbus. A client app is provided that asks the proxy to connect to libwebsockets.org and proxy the drawing data from the mirror example there back to the dbus client using dbus messages. |
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|---|---|---|
| .. | ||
| CMakeLists.txt | ||
| minimal-dbus-client.c | ||
| README.md | ||
lws minimal dbus client
This demonstrates nonblocking, asynchronous dbus method calls as the client.
build
Using libdbus requires additional non-default include paths setting, same as is necessary for lws build described in ./lib/roles/dbus/README.md
CMake can guess one path and the library name usually, see the README above for details of how to override for custom libdbus and cross build.
Fedora example:
$ cmake .. -DLWS_DBUS_INCLUDE2="/usr/lib64/dbus-1.0/include"
$ make
Ubuntu example:
$ cmake .. -DLWS_DBUS_INCLUDE2="/usr/lib/x86_64-linux-gnu/dbus-1.0/include"
$ make
usage
| Commandline option | Meaning |
|---|---|
| -d | Debug verbosity in decimal, eg, -d15 |
The minimal client connects to the minimal dbus server example, which is expected to be listening on its default abstract unix domain socket path.
It call the server Echo method with "Hello!" and returns to the event loop. When the reply comes, it prints the returned message.
Afterwards it just sits there receiving unsolicited messages from the server example, until closed by the user.
$ ./lws-minimal-dbus-client
ctx
[2018/10/05 06:08:31:4901] NOTICE: pending_call_notify
[2018/10/05 06:08:31:4929] USER: pending_call_notify: received 'Hello!'
^C[2018/10/05 06:09:22:4409] NOTICE: destroy_dbus_client_conn
[2018/10/05 06:09:22:4691] NOTICE: Exiting cleanly
...