Merge pull request #305 from the-hideout/http-server

Add HTTP Server

README.md

@@ -86,3 +86,12 @@ wrangler publish
 ```
 
 > We don't do this often and generally use GitHub actions to do all of our deployments for us
+
+## HTTP Server
+
+There's also an http webserver in the /http folder. It can be run with `npm run dev` or `npm start`. To run locally, you need to set the following vars (for local testing, you can use an .env file in the /http folder):
+
+- CLOUDFLARE_TOKEN (token must have permissions to read the KVs the API uses)
+- CACHE_BASIC_AUTH (used for caching)
+- ENVIRONMENT (either `production` or `dev`; determines which KVs are read)
+- PORT (defaults to 8088)

http/env-binding.mjs

@@ -0,0 +1,28 @@
+// this module provides a way for the http server to access the cloudflare KVs
+// using the same method as in the worker context
+const accountId = '424ad63426a1ae47d559873f929eb9fc';
+
+const productionNamespaceId = '2e6feba88a9e4097b6d2209191ed4ae5';
+const devNameSpaceID = '17fd725f04984e408d4a70b37c817171';
+
+export default function getEnv() {
+    return {
+        ...process.env,
+        DATA_CACHE: {
+            getWithMetadata: async (kvName, format) => {
+                const namespaceId = process.env.ENVIRONMENT === 'production' ? productionNamespaceId : devNameSpaceID;
+                const url = `https://api.cloudflare.com/client/v4/accounts/${accountId}/storage/kv/namespaces/${namespaceId}/values/${kvName}`;
+                const response = await fetch(url, {
+                    method: 'GET',
+                    headers: {
+                        'Content-Type': 'application/json',
+                        Authorization: `Bearer ${process.env.CLOUDFLARE_TOKEN}`,
+                    },
+                });
+                return {
+                    value: await response.text(),
+                };
+            },
+        },
+    }
+};

http/index.mjs

@@ -0,0 +1,46 @@
+import express from 'express';
+import 'dotenv/config';
+
+import worker from '../index.mjs';
+import getEnv from './env-binding.mjs';
+
+const port = process.env.PORT ?? 8788;
+
+const convertIncomingMessageToRequest = (req) => {
+    var headers = new Headers();
+    for (var key in req.headers) {
+        if (req.headers[key]) headers.append(key, req.headers[key]);
+    }
+    let body = req.body;
+    if (typeof body === 'object') {
+        body = JSON.stringify(body);
+    }
+    let request = new Request(new URL(req.url, `http://127.0.0.1:${port}`).toString(), {
+        method: req.method,
+        body: req.method === 'POST' ? body : null,
+        headers,
+    })
+    return request
+};
+
+const app = express();
+app.use(express.json({limit: '100mb'}), express.text());
+app.all('*', async (req, res, next) => {
+    const response = await worker.fetch(convertIncomingMessageToRequest(req), getEnv(), {waitUntil: () => {}});
+
+    // Convert Response object to JSON
+    const responseBody = await response.text();
+
+    // Reflect headers from Response object
+    //Object.entries(response.headers.raw()).forEach(([key, value]) => {
+    response.headers.forEach((value, key) => {
+        res.setHeader(key, value);
+    });
+
+    // Send the status and JSON body
+    res.status(response.status).send(responseBody);
+});
+
+app.listen(port, () => {
+    console.log(`HTTP GraphQL server running at http://127.0.0.1:${port}`);
+});