Node example

src/serve_currenttime/main.js

@@ -1,24 +1,51 @@
-const messages = require("./stubs/serve_currenttime_pb");
-const services = require("./stubs/serve_currenttime_grpc_pb");
 const grpc = require("@grpc/grpc-js");
+const PROTO_PATH = "../protos/serve_currenttime.proto";
+const protoLoader = require("@grpc/proto-loader");
+var utc = require("dayjs/plugin/utc");
+
+const timezone = require("dayjs/plugin/timezone");
+const dayjs = require("dayjs");
+dayjs.extend(utc);
+dayjs.extend(timezone);
 
 const SERVE_CURRENTTIME_HOST = "localhost";
 const SERVE_CURRENTTIME_PORT = 50000;
 
-function getCurrentTime(call, callback) {
-    var response = new messages.GetCurrentTimeResponse();
-    response.setMessage("Hello " + call.request.getName());
-    callback(null, response);
+const options = {
+    keepCase: true,
+    longs: String,
+    enums: String,
+    defaults: true,
+    oneofs: true,
+};
+
+function getCurrentTime(request, callback) {
+    const timezone = request.timezone;
+    const now = dayjs().tz(timezone);
+
+    callback(null, {
+        hours: now.hour(),
+        minutes: now.minute(),
+        seconds: now.second(),
+        milliseconds: now.millisecond(),
+        formatted_time: now.format("YYYY-MM-DDTHH:mm:ss.SSS"),
+    });
 }
 
 function main() {
-    console.log(`Starting server on ${SERVE_CURRENTTIME_HOST}:${SERVE_CURRENTTIME_PORT}`);
-    var server = new grpc.Server();
-    server.addService(services.ServeCurrentTimeService, { getCurrentTime: getCurrentTime });
+    var packageDefinition = protoLoader.loadSync(PROTO_PATH, options);
+    const serveCurrentTimeProto = grpc.loadPackageDefinition(packageDefinition).serve_currenttime;
+    const server = new grpc.Server();
+
+    server.addService(serveCurrentTimeProto.ServeCurrentTimeService.service, {
+        getCurrentTime: getCurrentTime,
+    });
+
     server.bindAsync(
         `${SERVE_CURRENTTIME_HOST}:${SERVE_CURRENTTIME_PORT}`,
         grpc.ServerCredentials.createInsecure(),
         () => {
+            console.log(`Starting server on ${SERVE_CURRENTTIME_HOST}:${SERVE_CURRENTTIME_PORT}`);
             server.start();
         }
     );