Initial commit

Author: tylermenezes

.circleci/config.yml

@@ -0,0 +1,41 @@
+version: 2.1
+workflows:
+  build:
+    jobs:
+      - build:
+          filters:
+            branches:
+              only: master
+          context: Docker Hub
+  build_test:
+    jobs:
+      - build_test:
+          filters:
+            branches:
+              ignore: master
+jobs:
+  build:
+    docker:
+      - image: circleci/node:latest
+    steps:
+      - setup_remote_docker
+      - checkout
+      - run: |
+          TAG=$CIRCLE_SHA1
+          DOCKER_REPO=$CIRCLE_PROJECT_USERNAME/$CIRCLE_PROJECT_REPONAME
+          docker build -t $DOCKER_REPO:$TAG .
+          docker tag $DOCKER_REPO:$TAG $DOCKER_REPO:latest
+          echo $DOCKER_PASS | docker login -u $DOCKER_USER --password-stdin
+          docker push $DOCKER_REPO:$TAG
+          docker push $DOCKER_REPO:latest
+
+  build_test:
+    docker:
+      - image: circleci/node:latest
+    steps:
+      - setup_remote_docker
+      - checkout
+      - run: |
+          TAG=$CIRCLE_SHA1
+          DOCKER_REPO=$CIRCLE_PROJECT_USERNAME/$CIRCLE_PROJECT_REPONAME
+          docker build -t $DOCKER_REPO:$TAG .

.dockerignore

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+node_modules
+npm-debug.log

.gitignore

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+node_modules
+npm-debug.log

Dockerfile

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+FROM node:10-alpine
+
+WORKDIR /app
+COPY package.json /app
+COPY yarn.lock /app
+
+RUN yarn install
+
+COPY src/ /app/src
+
+EXPOSE 80
+CMD [ "node", "src" ]

Makefile

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+.DEFAULT_GOAL := main
+
+main:
+	@docker build . -t srnd/docker-redirect-many
+run:
+	@docker run srnd/docker-redirect-many

package.json

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+{
+  "dependencies": {
+    "express": "^4.17.1"
+  }
+}

src/env-all-matching.js

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+module.exports = key => {
+  return Object.keys(process.env)
+    .filter(env => env.substr(0, key.length) === key)
+    .map(env => process.env[env]);
+};

src/index.js

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+const app = require("express")();
+const envAllMatching = require("./env-all-matching");
+
+const redirectDomains = envAllMatching("REDIRECT_")
+  .map(env => env.split(":"))
+  .reduce((a, b) => {
+    a[b[0]] = b[1];
+    return a;
+  }, {});
+
+app.use((req, res) => {
+  let redirectDomain = null;
+  if (req.get("host") in redirectDomains)
+    redirectDomain = redirectDomains[req.get("host")];
+  else if (req.get("host").split(".").length === 2)
+    redirectDomain = `www.${req.get("host")}`;
+
+  const proto = req.get("x-forwarded-proto") || req.protocol;
+
+  if (redirectDomain)
+    return res.redirect(`${proto}://${redirectDomain}${req.originalUrl}`);
+  else if (req.path === "/status") return res.send("ok");
+  else
+    return res
+      .status(404)
+      .contentType("text")
+      .send("404 page not found");
+});
+
+const port = parseInt(process.env.PORT) || 80;
+app.listen(port, () =>
+  console.log(
+    `Listening on port ${port}, redirections:\n\n${JSON.stringify(
+      redirectDomains,
+      null,
+      2
+    )}`
+  )
+);