### 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 requires the following libraries:
 * libmagic ("libmagic-dev" under Debian/Ubuntu, "file-devel" under OpenSUSE);
 * libmicrohttpd ("libmicrohttpd-dev/devel");
 * json-c ("libjson-c-dev/devel");
 * uuid ("uuid-dev/libuuid-devel");
 * dbus ("libdbus-1-dev/dbus-1-devel");

optionally, for plugins :
 * alsa ("libasound2-dev/alsa-devel");
 * pulseaudio ("libpulse-dev/libpulse-devel");
 * rtl-sdr >= 0.5.0 (fetch and build from "git://git.osmocom.org/rtl-sdr");

and the following tools:
 * pkg-config;
 * cmake >= 2.8.8.

To install all dependencies under OpenSUSE (excepting rtl-sdr), please type:
```
$ zypper in file-devel libmicrohttpd-devel libjson-c-devel libuuid-devel dbus-1-devel alsa-devel libpulse-devel pkg-config cmake
```

 To build, move to the root directory and type:
```
$ mkdir build; cd build<br />
$ cmake ..<br />
$ make; make install<br />
```

### 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.