more error checks

Dockerfile

@@ -125,7 +125,7 @@ EXPOSE 80
 
 # Install Node.js & NGINX
 RUN apt-get update && \
-    apt-get install --no-install-recommends -y nginx figlet && \
+    apt-get install --no-install-recommends -y nginx figlet curl && \
     rm -rf /var/lib/apt/lists/*
 
 COPY --from=ffmpeg-builder /libraries/usr/lib /usr/lib/x86_64-linux-gnu/

scripts/entrypoint.sh

@@ -50,7 +50,16 @@ nginx
 
 # Start GPAC
 cd /opt
-(gpac-dash -chunk-media-segments -cors $NETWORK_PROFILE &) >/dev/null 2>&1
+(gpac-dash -chunk-media-segments -cors $NETWORK_PROFILE &) 1>/dev/null
+
+# Check if GPAC is running
+sleep 1
+curl -s http://localhost:8000/status | grep -q "OK"
+
+if [ $? -ne 0 ]; then
+    echo "GPAC failed to launch, check your arguments"
+    exit 1
+fi
 
 # Show banner
 figlet "A-CAPSC Demonstration"

server/gpac-dash.js

@@ -486,6 +486,12 @@ var onRequest = function (req, res) {
 	var notFound = false;
 	var fStat;
 
+	if (req.url == "/status") {
+		res.writeHead(200, { "Content-Type": "text/plain" });
+		res.end("OK");
+		return;
+	}
+
 	if (incoming_log_file && (req.url.slice(-3) === "mpd")) {
 		fs.appendFile(incoming_log_file, (new Date()) + ": Incoming request from " + req.socket.remoteAddress + " for URL: " + req.url + " with headers: " + JSON.stringify(req.headers) + "\n");
 	}