Add API for proxying discord webhook calls

Author: AleksTeresh

README.md

@@ -35,6 +35,8 @@ BOT_ID=id-of-your-bot
 CLIENT_SECRET=your-client-secret
 DISCORD_REDIRECT_URL=your-client-oauth2-redirect-url-with-identyfy-guilds.join
 DISCORD_SERVER_INVITE=your-discord-server-invite
+DISCORD_WEBHOOK_URL=discord-webhook-used-in-fullstack-open-course
+DISCORD_WEBHOOK_TOKEN=token-for-the-discord-webhook
 PORT=your-custom-backend-port
 SESSION_SECRET=server-session-secret
 BACKEND_SERVER_URL=backend-server-url-without-port

src/server/app.js

@@ -6,6 +6,7 @@ const discordAuthRoute = require("./routes/discordAuth");
 const discordJoinRoute = require("./routes/join");
 const facultyAuthRoute = require("./routes/authenticateFaculty");
 const metricsRoute = require("./routes/metrics");
+const webhookProxyRoute = require("./routes/webhookProxy");
 const defaultRouteHandler = require("./routes/defaultRouteHandler");
 const defaultRouteErrorHandler = require("./routes/defaultRouteErrorHandler");
 const flash = require("connect-flash");
@@ -38,6 +39,7 @@ module.exports = (sequelize) => {
   app.use(flash());
   app.use("/discordAuth", discordAuthRoute);
   app.use("/join", discordJoinRoute);
+  app.use("/webhooks", webhookProxyRoute);
   app.use("/authenticate_faculty", facultyAuthRoute);
   app.use("/metrics", metricsRoute);
 

src/server/routes/webhookProxy.js

@@ -0,0 +1,22 @@
+require("dotenv").config()
+const axios = require("axios")
+const router = require("express").Router()
+
+router.get("/:webhookId", async (req, res) => {
+  // only allow POST
+  if (req.method === "POST") {
+    const webhookUrl = `${process.env.DISCORD_WEBHOOK_URL}/${req.params.webhookId}/${process.env.DISCORD_WEBHOOK_TOKEN}`
+    const webhookData = req.body
+    try {
+      await axios.post(webhookUrl, webhookData)
+      res.status(200).send("Webhook sent successfully")
+    } catch (error) {
+      console.error(error)
+      res.status(500).send("Internal server error")
+    }
+  } else {
+    res.status(405).send("Method not allowed")
+  }
+})
+
+module.exports = router