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-lock.json

+{
+  "name": "idrac-xml-replacer",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "@types/body-parser": {
+      "version": "1.19.0",
+      "resolved": "https://registry.npmjs.org/@types/body-parser/-/body-parser-1.19.0.tgz",
+      "integrity": "sha512-W98JrE0j2K78swW4ukqMleo8R7h/pFETjM2DQ90MF6XK2i4LO4W3gQ71Lt4w3bfm2EvVSyWHplECvB5sK22yFQ==",
+      "requires": {
+        "@types/connect": "*",
+        "@types/node": "*"
+      }
+    },
+    "@types/connect": {
+      "version": "3.4.33",
+      "resolved": "https://registry.npmjs.org/@types/connect/-/connect-3.4.33.tgz",
+      "integrity": "sha512-2+FrkXY4zllzTNfJth7jOqEHC+enpLeGslEhpnTAkg21GkRrWV4SsAtqchtT4YS9/nODBU2/ZfsBY2X4J/dX7A==",
+      "requires": {
+        "@types/node": "*"
+      }
+    },
+    "@types/express": {
+      "version": "4.17.6",
+      "resolved": "https://registry.npmjs.org/@types/express/-/express-4.17.6.tgz",
+      "integrity": "sha512-n/mr9tZI83kd4azlPG5y997C/M4DNABK9yErhFM6hKdym4kkmd9j0vtsJyjFIwfRBxtrxZtAfGZCNRIBMFLK5w==",
+      "requires": {
+        "@types/body-parser": "*",
+        "@types/express-serve-static-core": "*",
+        "@types/qs": "*",
+        "@types/serve-static": "*"
+      }
+    },
+    "@types/express-http-proxy": {
+      "version": "1.6.1",
+      "resolved": "https://registry.npmjs.org/@types/express-http-proxy/-/express-http-proxy-1.6.1.tgz",
+      "integrity": "sha512-FjuKVtGaT3ccHD7uFr7vKDsn3shEEc/Upo2YnVsTfoDPuUbCV/GIsinG7gbrkzcIYELqh+8hYmn/rEfqMQA/9g==",
+      "requires": {
+        "@types/express": "*"
+      }
+    },
+    "@types/express-serve-static-core": {
+      "version": "4.17.8",
+      "resolved": "https://registry.npmjs.org/@types/express-serve-static-core/-/express-serve-static-core-4.17.8.tgz",
+      "integrity": "sha512-1SJZ+R3Q/7mLkOD9ewCBDYD2k0WyZQtWYqF/2VvoNN2/uhI49J9CDN4OAm+wGMA0DbArA4ef27xl4+JwMtGggw==",
+      "requires": {
+        "@types/node": "*",
+        "@types/qs": "*",
+        "@types/range-parser": "*"
+      }
+    },
+    "@types/iconv-lite": {
+      "version": "0.0.1",
+      "resolved": "https://registry.npmjs.org/@types/iconv-lite/-/iconv-lite-0.0.1.tgz",
+      "integrity": "sha1-qjuL2ivlErGuCgV7lC6GnDcKVWk=",
+      "requires": {
+        "@types/node": "*"
+      }
+    },
+    "@types/mime": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/@types/mime/-/mime-2.0.2.tgz",
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+    },
+    "@types/node": {
+      "version": "14.0.14",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-14.0.14.tgz",
+      "integrity": "sha512-syUgf67ZQpaJj01/tRTknkMNoBBLWJOBODF0Zm4NrXmiSuxjymFrxnTu1QVYRubhVkRcZLYZG8STTwJRdVm/WQ=="
+    },
+    "@types/qs": {
+      "version": "6.9.3",
+      "resolved": "https://registry.npmjs.org/@types/qs/-/qs-6.9.3.tgz",
+      "integrity": "sha512-7s9EQWupR1fTc2pSMtXRQ9w9gLOcrJn+h7HOXw4evxyvVqMi4f+q7d2tnFe3ng3SNHjtK+0EzGMGFUQX4/AQRA=="
+    },
+    "@types/range-parser": {
+      "version": "1.2.3",
+      "resolved": "https://registry.npmjs.org/@types/range-parser/-/range-parser-1.2.3.tgz",
+      "integrity": "sha512-ewFXqrQHlFsgc09MK5jP5iR7vumV/BYayNC6PgJO2LPe8vrnNFyjQjSppfEngITi0qvfKtzFvgKymGheFM9UOA=="
+    },
+    "@types/serve-static": {
+      "version": "1.13.4",
+      "resolved": "https://registry.npmjs.org/@types/serve-static/-/serve-static-1.13.4.tgz",
+      "integrity": "sha512-jTDt0o/YbpNwZbQmE/+2e+lfjJEJJR0I3OFaKQKPWkASkCoW3i6fsUnqudSMcNAfbtmADGu8f4MV4q+GqULmug==",
+      "requires": {
+        "@types/express-serve-static-core": "*",
+        "@types/mime": "*"
+      }
+    },
+    "@types/xml2js": {
+      "version": "0.4.5",
+      "resolved": "https://registry.npmjs.org/@types/xml2js/-/xml2js-0.4.5.tgz",
+      "integrity": "sha512-yohU3zMn0fkhlape1nxXG2bLEGZRc1FeqF80RoHaYXJN7uibaauXfhzhOJr1Xh36sn+/tx21QAOf07b/xYVk1w==",
+      "requires": {
+        "@types/node": "*"
+      }
+    },
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+      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.7.tgz",
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+      "requires": {
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+        "negotiator": "0.6.2"
+      }
+    },
+    "array-flatten": {
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+      "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
+      "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
+    },
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+      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.19.0.tgz",
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+        "debug": "2.6.9",
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+        "iconv-lite": "0.4.24",
+        "on-finished": "~2.3.0",
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+        "raw-body": "2.4.0",
+        "type-is": "~1.6.17"
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+          }
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+    }
+  }
+}

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"
+	]
+}