Add a loop mode and an init script

- add one argument -l --loop
- add one conf key loop-delay

conf-sample.ini

@@ -1,5 +1,6 @@
 [conf]
 debug=false
+loop-delay=15
 host=127.0.0.1:8000
 mount=/fip.mp3
 login=admin

fip_current.py

@@ -15,6 +15,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+import sys
 import time
 import requests
 import configparser
@@ -40,16 +41,53 @@ def main():
         type=str,
         default='conf.ini',
         help="Configuration file")
+    parser.add_argument(
+        '-l', '--loop',
+        dest='loop',
+        action='store_const',
+        const=True,
+        default=False,
+        help="Combined with -u enables loop update")
+    """
+    parser.add_argument(
+        '-d', '--loop-delay',
+        dest='delay',
+        type=int,
+        default=15,
+        help="Loop delay in seconds")
+    """
     args = parser.parse_args()
     conf = configparser.ConfigParser()
     conf.read(args.conf)
-    globals()['DEBUG'] = conf.get('conf', 'debug', fallback="False").lower() == 'true'
+    debug = conf.get('conf', 'debug', fallback="False").lower() == 'true'
+    globals()['DEBUG'] = debug
     if args.update:
         host = conf.get('conf', 'host', fallback='127.0.0.1:8000')
         mount = conf.get('conf', 'mount', fallback='/example.ogg')
         login = conf.get('conf', 'login', fallback='admin')
         password = conf.get('conf', 'password', fallback='hackme')
-        icecast_update(host, mount, login, password)
+        if args.loop:
+            delay = conf.get('conf', 'loop-delay', fallback='15')
+            try:
+                delay = int(delay)
+            except ValueError:
+                msg = "loop-delay expected to be an integer '%s' found"
+                raise ValueError( msg % delay)
+            prev = None
+            while True:
+                try:
+                    if globals()['DEBUG']:
+                        print("Update start");
+                    prev = icecast_update(host, mount, login, password, prev)
+                    if globals()['DEBUG']:
+                        print("Updated");
+                    time.sleep(delay)
+                except Exception as e:
+                    prev = None
+                    print(str(e), file=sys.stderr)
+                
+        else:
+            icecast_update(host, mount, login, password)
     else:
         print(format_current())
 
@@ -117,7 +155,7 @@ def icecast_infos():
     return infos
 
 
-def icecast_update(host, mount, login=None, password=None):
+def icecast_update(host, mount, login=None, password=None, prev = None):
     """ Update metadatas to an Icecast2 mount """
     infos = icecast_infos()
     url = "http://{host}/admin/metadata"
@@ -129,16 +167,19 @@ def icecast_update(host, mount, login=None, password=None):
     auth = None
     if login is not None and password is not None:
         auth = (login, password)
+    
+    if infos != prev:
+        try:
+            res = requests.get(url, auth=auth, params=params)
+        except requests.exceptions.ConnectionError:
+            raise RuntimeError("Connection refuse for "+res.url)
+
+        if res.status_code != 200:
+            msg = "Got status code %d for %s"
+            msg %= (res.status_code, res.url)
+            raise RuntimeError(msg)
 
-    try:
-        res = requests.get(url, auth=auth, params=params)
-    except requests.exceptions.ConnectionError:
-        raise RuntimeError("Connection refuse for "+res.url)
-
-    if res.status_code != 200:
-        msg = "Got status code %d for %s"
-        msg %= (res.status_code, res.url)
-        raise RuntimeError(msg)
+    return infos
 
 if __name__ == '__main__':
     main()

init_script

@@ -0,0 +1,63 @@
+#! /bin/sh
+### BEGIN INIT INFO
+# Provides:          fip-current
+# Required-Start:    $remote_fs $network icecast2
+# Required-Stop:     $remote_fs
+# Default-Start:     2 3 4 5
+# Default-Stop:      0 1 6
+# Short-Description: Icecast2 FIP relay metadata update script
+# Description:       Start updating Icecast2 metadatas using FIP radio wep API
+### END INIT INFO
+
+DPATH=/PUT/SCRIPT/PATH/HERE
+
+SCRIPT="fip_current.py"
+DAEMON="${DPATH}/${SCRIPT}"
+CONFIG="${DPATH}/conf.ini"
+NAME="fip-current"
+DESC="fip-current update script"
+DAEMON_OPTS="-ul -c $CONFIG"
+PIDFILE="/run/fip-current.pid"
+
+set_path()
+{
+	echo "DPATH variable not set or wrong in init_script";
+	exit 1;
+}
+
+test -x $DAEMON || set_path
+
+. /lib/lsb/init-functions
+
+case $1 in
+	start)
+		
+		log_daemon_msg "Starting $DESC"
+		if $0 status >/dev/null
+		then
+			echo -n " allready running"
+			log_end_msg 1
+		else
+			start-stop-daemon --quiet --start --background -m -p $PIDFILE --exec $DAEMON -- $DAEMON_OPTS
+			log_end_msg $?
+		fi
+		
+		;;
+	stop)
+		log_daemon_msg "Stopping $DESC"
+		start-stop-daemon --stop -p $PIDFILE --remove-pidfile -x $DAEMON
+		log_end_msg $?
+		;;
+	restart)
+		$0 stop
+		$0 start
+		;;
+	status)
+		status_of_proc "$DAEMON" "$NAME" && exit 0 || exit $?
+		;;
+	*)
+		echo "Usage: $0 {start|stop|restart|status}" >&2
+		exit 1
+		;;
+esac
+