first

.dockerignore

+node_modules
+*.js
+*.js.map
+.vs*
+
+.dockerignore
+.git*
+Dockerfile

.gitignore

+node_modules
+*.js
+*.js.map
+.vs*

.gitlab-ci.yml

+stages:
+  - build
+  - deploy
+
+variables:
+  GIT_DEPTH: "1"
+  CONTAINER_TEST_IMAGE: $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG
+  CONTAINER_RELEASE_IMAGE: $CI_REGISTRY_IMAGE:latest
+
+before_script:
+  - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
+
+build:
+  stage: build
+  tags: 
+    - docker
+  script:
+    - docker build --pull -t $CONTAINER_TEST_IMAGE .
+    - docker push $CONTAINER_TEST_IMAGE
+
+deploy_latest:
+  stage: deploy
+  tags: 
+    - docker
+  script:
+    - docker pull $CONTAINER_TEST_IMAGE
+    - docker tag $CONTAINER_TEST_IMAGE $CONTAINER_RELEASE_IMAGE
+    - docker push $CONTAINER_RELEASE_IMAGE
+  only:
+    - master
+
+deploy_tag:
+  stage: deploy
+  tags: 
+    - docker
+  variables:
+    CONTAINER_TAG_IMAGE: $CI_REGISTRY_IMAGE:$CI_COMMIT_TAG
+  script:
+    - docker pull $CONTAINER_TEST_IMAGE
+    - docker tag $CONTAINER_TEST_IMAGE $CONTAINER_TAG_IMAGE
+    - docker push $CONTAINER_TAG_IMAGE
+  only:
+    - tags

Dockerfile

+FROM node:buster-slim
+
+RUN apt update && \
+	apt -y install build-essential python3 && \
+	rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+
+WORKDIR /usr/src/app
+COPY package*.json ./
+RUN npm ci
+COPY . ./
+RUN npm run build
+CMD ["npm", "run", "start"]

package.json

+{
+  "name": "idrac-xml-replacer",
+  "version": "1.0.0",
+  "description": "Replace iDRAC address",
+  "main": "server.js",
+  "dependencies": {
+    "@types/express": "^4.17.6",
+    "@types/express-http-proxy": "^1.6.1",
+    "@types/iconv-lite": "0.0.1",
+    "@types/node": "^14.0.14",
+    "@types/xml2js": "^0.4.5",
+    "express": "^4.17.1",
+    "express-http-proxy": "^1.6.0",
+    "iconv-lite": "^0.6.1",
+    "typescript": "^3.9.5",
+    "xml2js": "^0.4.23"
+  },
+  "devDependencies": {},
+  "scripts": {
+    "build": "./node_modules/.bin/tsc",
+    "start": "node server.js"
+  },
+  "author": "Nanahira",
+  "license": "ISC"
+}

server.ts

+import express from "express";
+import proxy from "express-http-proxy";
+import zlib from "zlib";
+import util from "util";
+import iconv from "iconv-lite";
+import xml from "xml2js";
+const gzip: (b: Buffer) => Promise<Buffer> = util.promisify(zlib.gzip);
+const gunzip: (b: Buffer) => Promise<Buffer> = util.promisify(zlib.gunzip);
+
+const xmlParser = new xml.Parser();
+const xmlBuilder = new xml.Builder();
+
+const baseLocation: string = process.env.BASE_LOCATION;
+const baseLocationAccessProtocols: string = process.env.PROTOCOL || "HTTP";
+
+const app = express();
+app.use(express.json());
+app.use(express.urlencoded({ extended: true }));
+
+app.use('/', proxy("https://downloads.dell.com,", {
+	userResDecorator: async (proxyRes, proxyResData, userReq, userRes) => { 
+		if (userReq.url.startsWith("/catalog/catalog.xml.gz")) { 
+			const content = iconv.decode(await gunzip(proxyResData), "utf16");
+			const xmlObject: any = await xmlParser.parseStringPromise(content);
+			xmlObject.Manifest.$.baseLocation = baseLocation;
+			xmlObject.Manifest.$.baseLocationAccessProtocols = baseLocationAccessProtocols;
+			const replaceContent = xmlBuilder.buildObject(xmlObject);
+			return await gzip(iconv.encode(replaceContent, "utf16"));
+		}
+		return proxyResData;
+	}
+}));
+app.listen(80);

tsconfig.json

+{
+	"compilerOptions": {
+		"module": "commonjs",
+		"target": "esnext",
+		"esModuleInterop": true,
+		"resolveJsonModule": true,
+		"sourceMap": true
+	},
+	"compileOnSave": true,
+	"allowJs": true,
+	"include": [
+		"*.ts"
+	]
+}