From 2dbd8cfd6b9777464165df8e6572143eed1bcbc2 Mon Sep 17 00:00:00 2001 From: Andrey Vorobyov Date: Wed, 25 Sep 2024 23:02:43 +0300 Subject: [PATCH 1/2] ref: node app using stdlib --- lessons/210/node-app/app.js | 96 +-- lessons/210/node-app/package-lock.json | 916 ------------------------- lessons/210/node-app/package.json | 1 - 3 files changed, 50 insertions(+), 963 deletions(-) diff --git a/lessons/210/node-app/app.js b/lessons/210/node-app/app.js index aa5b48241..a2a2b144f 100644 --- a/lessons/210/node-app/app.js +++ b/lessons/210/node-app/app.js @@ -1,65 +1,69 @@ -import express from "express"; -import save from "./devices.js"; import summary from "./metrics.js"; +import save from "./devices.js"; import { randomUUID } from "crypto"; import { register } from "prom-client"; import config from "./config.js"; -const app = express(); +import * as http from "node:http"; -app.use(express.json()); +const server = http.createServer({ keepAliveTimeout: 60000 }, (req, res) => { + if (req.url === "/metrics") { + res.writeHead(200, { "Content-Type": register.contentType }); + register.metrics().then((data) => res.end(data)); + return; + } -// Expose Prometheus metrics. -app.get("/metrics", async (_req, res) => { - res.setHeader("Content-Type", register.contentType); - register.metrics().then((data) => res.status(200).send(data)); -}); + if (req.url === "/healthz") { + res.writeHead(200, { "Content-Type": "text/plain" }); + res.end("OK"); + return; + } -// Returns the status of the application. -app.get("/healthz", async (_req, res) => { - // Placeholder for the health check - res.send("OK"); -}); + if (req.method === "GET" && req.url === "/api/devices") { + const device = { + uuid: "9add349c-c35c-4d32-ab0f-53da1ba40a2a", + mac: "5F-33-CC-1F-43-82", + firmware: "2.1.6", + }; -// Returns a list of connected devices. -app.get("/api/devices", async (_req, res) => { - const device = { - uuid: "9add349c-c35c-4d32-ab0f-53da1ba40a2a", - mac: "5F-33-CC-1F-43-82", - firmware: "2.1.6", - }; + res.writeHead(200, { "Content-Type": "application/json" }); + res.end(JSON.stringify(device)); + return; + } - res.status(200).json(device); -}); + if (req.method === "POST" && req.url === "/api/devices") { + let body = ""; + req.on("data", (chunk) => { + body += chunk.toString(); + }); -// Registers the device. -app.post("/api/devices", async (req, res) => { - let device = req.body; + req.on("end", () => { + let device = JSON.parse(body); - // Generate a new UUID for the device. - device.uuid = randomUUID(); + device.uuid = randomUUID(); - // Get the current time to record the duration of the request. - const end = summary.startTimer(); + const end = summary.startTimer(); - // Save the device to the database. - save(device) - .then(() => { - // Record the duration of the insert query. - end({ op: "db" }); + save(device) + .then(() => { + end({ op: "db" }); - // Return Device back to the client. - res.status(201).json(device); - }) - .catch((error) => { - // Log the error. - console.error(error); + res.writeHead(201, { "Content-Type": "application/json" }); + res.end(JSON.stringify(device)); + }) + .catch((error) => { + console.error(error); - // Return a summary of the error to the client. - res.status(400).json({ message: error.message }); + res.writeHead(400, { "Content-Type": "application/json" }); + res.end(JSON.stringify({ message: error.message })); + }); }); -}); -app.listen(config.appPort, () => { - console.log(`Starting the web server on port ${config.appPort}`); + return; + } + + res.writeHead(404, { "Content-Type": "text/plain" }); + res.end("Not Found"); }); + +server.listen(config.appPort); diff --git a/lessons/210/node-app/package-lock.json b/lessons/210/node-app/package-lock.json index ce4375dcf..de3624d62 100644 --- a/lessons/210/node-app/package-lock.json +++ b/lessons/210/node-app/package-lock.json @@ -9,7 +9,6 @@ "version": "0.1.0", "license": "ISC", "dependencies": { - "express": "^5.0.0", "js-yaml": "^4.1.0", "postgres": "^3.4.4", "prom-client": "^15.1.3" @@ -24,528 +23,18 @@ "node": ">=8.0.0" } }, - "node_modules/accepts": { - "version": "2.0.0", - "resolved": "https://registry.npmjs.org/accepts/-/accepts-2.0.0.tgz", - "integrity": "sha512-5cvg6CtKwfgdmVqY1WIiXKc3Q1bkRqGLi+2W/6ao+6Y7gu/RCwRuAhGEzh5B4KlszSuTLgZYuqFqo5bImjNKng==", - "license": "MIT", - "dependencies": { - "mime-types": "^3.0.0", - "negotiator": "^1.0.0" - }, - "engines": { - "node": ">= 0.6" - } - }, "node_modules/argparse": { "version": "2.0.1", "resolved": "https://registry.npmjs.org/argparse/-/argparse-2.0.1.tgz", "integrity": "sha512-8+9WqebbFzpX9OR+Wa6O29asIogeRMzcGtAINdpMHHyAg10f05aSFVBbcEqGf/PXw1EjAZ+q2/bEBg3DvurK3Q==", "license": "Python-2.0" }, - 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"express": "^5.0.0", "js-yaml": "^4.1.0", "postgres": "^3.4.4", "prom-client": "^15.1.3" From 40aa65cb320c2a6b00b3c874156a3af6198f027a Mon Sep 17 00:00:00 2001 From: Andrey Vorobyov Date: Wed, 25 Sep 2024 23:33:53 +0300 Subject: [PATCH 2/2] ref: GOMAXPROCS=1 --- lessons/210/deploy/go-app/2-deployment.yaml | 3 +++ 1 file changed, 3 insertions(+) diff --git a/lessons/210/deploy/go-app/2-deployment.yaml b/lessons/210/deploy/go-app/2-deployment.yaml index 1b5119878..ad10ea3ec 100644 --- a/lessons/210/deploy/go-app/2-deployment.yaml +++ b/lessons/210/deploy/go-app/2-deployment.yaml @@ -37,6 +37,9 @@ spec: containers: - name: go-app image: aputra/go-app-210:v3 + env: + - name: GOMAXPROCS + value: 1 ports: - name: http containerPort: 8080