My Glitch project, handsome-sheet is experiencing problems with handling requests from the Telegram API because I am using Express to host documentation files while using webhooks to pull and push requests to Telegram API servers. How should I fix this?
Source code
The source code is copied from the server.js file in the root directory. I removed the comments to take less reading time. Check the original file at https://glitch.com/edit/#!/handsome-sheet?path=server.js:1:0 if you want to review them.
var fs = require("fs");
const express = require("express");
const app = express();
const TelegramBot = require("node-telegram-bot-api");
const bodyParser = require("body-parser");
const { QueueManager } = require("node-telegram-operation-manager");
const token = process.env.TGBOT_TOKEN;
const url = process.env.APP_URL || process.env.NOW_URL;
const port = process.env.PORT || 443;
const GLITCH_PROJECT_SLUG = process.env.PROJECT_DOMAIN
const bot = new TelegramBot(token);
bot.setWebHook(`${url}/webhook/tgbot-${token}`);
app.use(bodyParser.json());
app.post(`/webhook/tgbot-${token}`, (req, res) => {
bot.processUpdate(req.body);
res.sendStatus(200);
});
app.use(express.static("public"));
function getFilesInDirectory(dir) {
return [].concat(
...fs.readdirSync(dir).map(name => {
const path = dir + "/" + name;
const stats = fs.statSync(path);
if (stats.isDirectory()) {
return getFilesInDirectory(path);
} else if (stats.isFile()) {
return [path];
}
return [];
})
);
}
app.get("/docs", function(request, response) {
const files = {};
getFilesInDirectory("docs")
.sort()
.forEach(path => {
const fileName = path.replace(/docs\/(.*)\.md/, "$1"); //trim off "docs/" and ".md"
files[fileName] = fs.readFileSync(path, "utf8");
});
response.send(files);
});
// http://expressjs.com/en/starter/basic-routing.html
app.get("/", function(request, response) {
response.sendFile(__dirname + "/views/index.html");
});
app.get("/offline", function(request, response) {
response.sendFile(__dirname + "/views/offline.html");
});
app.get("/manifest.json", function(request, response) {
response.sendFile(__dirname + "/views/manifest.json");
});
app.use(function (req, res, next) {
res.status(404).send("Sorry can't find that!")
res.sendFile(__dirname + "/views/404.html")
})
app.use(function (err, req, res, next) {
console.error(err.stack)
res.status(500).send('Something broke!')
})
app.listen(port, () => {
console.log(`Express server is listening on ${port}`);
});
//
// Matches "/echo [whatever]"
bot.onText(/\/start/, (msg) => {
const chatId = msg.chat.id;
bot.sendMessage(chatId, "Welcome to **Recap Time** bot\!", {parse_mode: "MarkdownV2", "reply_markup": {
"keyboard": [["Explore", "My Account"], ["About bot"], ["Send feedback"]]
}});
});
// Remove the code below for local deployments and deployments outside Glitch.com
// It's better to get your own copy of this project.
process.on("SIGTERM", function() {
console.log("SIGTERM received, sending SOS to Resurrect...");
require("https").get(
"https://resurrect.glitch.me/" +
GLITCH_PROJECT_SLUG +
"/optional/path/here",
process.exit
);
});
Error Log
Error: Can't set headers after they are sent.
at SendStream.headersAlreadySent (/rbd/pnpm-volume/d4aca002-e4f5-48b9-b6c6-e4dbb591af21/node_modules/.registry.npmjs.org/send/0.17.1/node_modules/send/index.js:390:13)
at SendStream.send (/rbd/pnpm-volume/d4aca002-e4f5-48b9-b6c6-e4dbb591af21/node_modules/.registry.npmjs.org/send/0.17.1/node_modules/send/index.js:617:10)
at onstat (/rbd/pnpm-volume/d4aca002-e4f5-48b9-b6c6-e4dbb591af21/node_modules/.registry.npmjs.org/send/0.17.1/node_modules/send/index.js:729:10)
at FSReqCallback.oncomplete (fs.js:167:5)