### Application Framework Binder
This is an undergoing work, publication is only intended for developers to review and provide feedback.
### License
As of today, the code is licensed under GLPv3. While no decision as been taken yet,
it will certainly switch to a different licence: GPLv2, Apache or MIT e.g..
Final goal is to keep the engine publicly accessible and modifiable, still allowing people to load non open-source plugins.
The code itself already leverages open-source libraries, including libmicrohttpd & libjson.
Finally, whatever license is chosen, it should be compatible with dependencies and automotive industry requirements - as the primary target for this code is AGL.
### Building
Building Application Framework Binder has been tested under **Ubuntu 16.04 LTS (Xenial Xerus)** or **Fedora 23**, and requires the following libraries:
* libmagic ("libmagic-dev" under Ubuntu, "file-devel" under Fedora);
* libmicrohttpd >= 0.9.48 (fetch and build from "http://ftp.gnu.org/gnu/libmicrohttpd");
* json-c ("libjson-c-dev/devel");
* uuid ("uuid-dev/libuuid-devel");
* openssl ("libssl-dev/openssl-devel");
* systemd >= 222 ("libsystemd-dev/systemd-devel");
Optionally, for plugins :
* alsa ("libasound2-dev/alsa-devel");
* pulseaudio ("libpulse-dev/libpulse-devel");
* rtl-sdr >= 0.5.0 ("librtlsdr-dev", or fetch and build from "git://git.osmocom.org/rtl-sdr" under Fedora);
* GUPnP ("libglib2.0-dev libgupnp-av-1.0-dev/glib2-devel libgupnp-av-devel");
Libmicrohttpd :
* version >= 0.9.54
and the following tools:
* gcc;
* make;
* pkg-config;
* cmake >= 2.8.8.
To install all dependencies under Ubuntu (excepting libmicrohttpd), please type:
```
$ apt-get install libmagic-dev libjson-c-dev uuid-dev libsystemd-dev libssl-dev libasound2-dev libpulse-dev librtlsdr-dev libglib2.0-dev libgupnp-av-1.0-dev gcc make pkg-config cmake
```
or under Fedora (excepting libmicrohttpd and rtl-sdr):
```
$ dnf install git passwd iproute openssh-server openssh-client openssh-server # Tools needed on top of Docker Minimal Fedora
$ dnf install file-devel gcc gdb make pkgconfig cmake # install gcc developement tool chain + cmake
$ dnf install file-devel json-c-devel libuuid-devel systemd-devel openssl-devel
$ dnf install alsa-lib-devel pulseaudio-libs-devel glib2-devel gupnp-av-devel # optional but require to build audio plugin
```
To build, move to your HOME directory and type:
```
$ LIB_MH_VERSION=0.9.54
$ export LIBMICRODEST=/opt/libmicrohttpd-${LIB_MH_VERSION}
$ wget https://ftp.gnu.org/gnu/libmicrohttpd/libmicrohttpd-${LIB_MH_VERSION}.tar.gz
$ tar -xzf libmicrohttpd-${LIB_MH_VERSION}.tar.gz
$ cd libmicrohttpd-${LIB_MH_VERSION}
$ ./configure --prefix=${LIBMICRODEST}
$ make
$ sudo make install-strip
$ AFB_DAEMON_DIR=$HOME/app-framework-binder
$ git clone https://gerrit.automotivelinux.org/gerrit/src/app-framework-binder ${AFB_DAEMON_DIR}
$ cd ${AFB_DAEMON_DIR}
$ mkdir -p build; cd build<br />
$ export PKG_CONFIG_PATH=${LIBMICRODEST}/lib/pkgconfig
$ cmake ..<br />
$ make;
$ sudo make install<br />
```
### Archive
```
VERSION=2.0
GIT_TAG=master
PKG_NAME=app-framework-binder
git archive --format=tar.gz --prefix=agl-${PKG_NAME}-${VERSION}/ ${GIT_TAG} -o agl-${PKG_NAME}_${VERSION}.orig.tar.gz
```
### Testing/Debug
```
$ ${AFB_DAEMON_DIR}/build/src/afb-daemon --help
$ ${AFB_DAEMON_DIR}/build/src/afb-daemon --port=1234 --token='' --ldpaths=${AFB_DAEMON_DIR}/build --sessiondir=/tmp --rootdir=${AFB_DAEMON_DIR}/test
```
### Starting
```
$ afb-daemon --help
$ afb-daemon --verbose --port=<port> --token='' --sessiondir=<working directory> --rootdir=<web directory (index.html)>
```
### Example
```
$ afb-daemon --verbose --port=1234 --token='' --sessiondir=/tmp --rootdir=/srv/www/htdocs --alias=icons:/usr/share/icons
```
### Directories & Paths
Default behaviour is to locate ROOTDIR in $HOME/.AFB
### REST API
Developers are intended to provide a structure containing : API name, corresponding methods/callbacks, and optionally a context and a handle.
A handle is a void* structure automatically passed to API callbacks.
Callbacks also receive HTTP GET data as well as HTTP POST data, in case a POST method was used.
Every method should return a JSON object or NULL in case of error.
API plugins can be protected from timeout and other errors. By default this behaviour is deactivated, use --apitimeout to activate it.
STATIC AFB_restapi myApis[]= {
{"ping" , AFB_SESSION_NONE, (AFB_apiCB)ping, "Ping Function"},
{"action1" , AFB_SESSION_CHECK, (AFB_apiCB)action1 , "Action-1"},
{"action2" , AFB_SESSION_CHECK, (AFB_apiCB)action2 , "Action-2"},
{NULL}
};
PUBLIC AFB_plugin *pluginRegister () {
AFB_plugin *plugin = malloc (sizeof (AFB_plugin));
plugin->type = AFB_PLUGIN_JSON;
plugin->info = "Plugin Sample";
plugin->prefix= "myPlugin";
plugin->apis = myApis;
return (plugin);
}
### HTML5 and AngularJS Redirects
Binder supports HTML5 redirect mode even with an application baseurl.
Default value for application base URL is /opa.
See Application Framework HTML5 Client template at https://github.com/iotbzh/afb-client-sample
If the Binder receives something like _http://myopa/sample_ when sample is not the homepage of the AngularJS OPA,
it will redirect to _http://myopa/#!sample_.
This redirect will return the _index.html_ OPA file and will notify AngularJS not to display the homepage, but the sample page.
Warning: in order for AngularJS applications to be able to work with both BASEURL="/" and BASEURL="/MyApp/", all page references have to be relative.
Recommended model is to develop with a BASEURL="/opa" as any application working with a BASEURL will work without, while the opposite is not true.
Note: If a resource is not accessible from ROOTDIR then the "--alias" switch should be used, as in: --alias=/icons:/usr/share/icons.
Only use alias for external support static files. This should not be used for API and OPA.
### Ongoing work
Javascript plugins. As of today, only C plugins are supported, but JS plugins are on the TODO list.
