Automated Preview URLs (#601)

preview/index.js

@@ -0,0 +1,44 @@
+const express = require("express");
+const { createProxyMiddleware } = require("http-proxy-middleware");
+const port = process.env.PORT || 3000;
+
+const api = createProxyMiddleware("/api", {
+  target: "https://main.documentdb.ext.azure.com",
+  changeOrigin: true,
+  logLevel: "debug",
+  bypass: (req, res) => {
+    if (req.method === "OPTIONS") {
+      res.statusCode = 200;
+      res.send();
+    }
+  },
+});
+
+const proxy = createProxyMiddleware("/proxy", {
+  target: "https://main.documentdb.ext.azure.com",
+  changeOrigin: true,
+  secure: false,
+  logLevel: "debug",
+  pathRewrite: { "^/proxy": "" },
+  router: (req) => {
+    let newTarget = req.headers["x-ms-proxy-target"];
+    return newTarget;
+  },
+});
+
+const commit = createProxyMiddleware("/commit", {
+  target: "https://cosmosexplorerpreview.blob.core.windows.net",
+  changeOrigin: true,
+  secure: false,
+  logLevel: "debug",
+  pathRewrite: { "^/commit": "$web/" },
+});
+
+const app = express();
+
+app.use(api);
+app.use(proxy);
+app.use(commit);
+app.listen(port, () => {
+  console.log(`Example app listening on port: ${port}`);
+});