Express bot detection and email validation

npm install express

const CONURE = "https://uat.conureapi.com";

/**
 * @param {{ key: string, timeoutMs?: number }} options
 */
export function blockBots({ key, timeoutMs = 3000 }) {
  if (!key) throw new Error("blockBots: missing API key");

  return async function (request, response, next) {
    const ip = request.ip;
    if (!ip) return next();

    try {
      const upstream = await fetch(CONURE + "/v1/bot-check", {
        method: "POST",
        headers: { Authorization: "Bearer " + key, "Content-Type": "application/json" },
        body: JSON.stringify({ ip, user_agent: request.get("user-agent") || "" }),
        signal: AbortSignal.timeout(timeoutMs),
      });

      // A 4xx or 5xx from us is not a verdict.
      if (!upstream.ok) return next();

      const verdict = await upstream.json();
      if (verdict.is_bot === true) {
        return response.status(403).json({
          error: "Automated traffic is not permitted.",
          reasons: verdict.reasons ?? [],
        });
      }
    } catch (error) {
      request.log?.warn?.({ error }, "conure unreachable");
    }
    return next();
  };
}

import express from "express";
import { blockBots } from "./middleware/conure.js";

const app = express();
app.set("trust proxy", 1); // required for request.ip to be the real client
app.use(express.json());

app.post("/signup", blockBots({ key: process.env.CONURE_API_KEY }), signupHandler);

curl -X POST https://uat.conureapi.com/v1/bot-check \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"ip":"52.1.2.3","user_agent":"curl/8.4.0"}'

import requests

HEADERS = {"Authorization": "Bearer YOUR_API_KEY"}

response = requests.post(
    "https://uat.conureapi.com/v1/bot-check",
    headers=HEADERS,
    json={"ip": "52.1.2.3", "user_agent": "curl/8.4.0"},
    timeout=5,
)
response.raise_for_status()
print(response.json())

const response = await fetch("https://uat.conureapi.com/v1/bot-check", {
  method: "POST",
  headers: {
    Authorization: "Bearer YOUR_API_KEY",
    "Content-Type": "application/json",
  },
  body: JSON.stringify({"ip":"52.1.2.3","user_agent":"curl/8.4.0"}),
  signal: AbortSignal.timeout(5000),
});

if (!response.ok) throw new Error("conure: " + response.status);
console.log(await response.json());

$curl = curl_init("https://uat.conureapi.com/v1/bot-check");
curl_setopt_array($curl, [
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_TIMEOUT => 5,
    CURLOPT_POST => true,
    CURLOPT_POSTFIELDS => '{"ip":"52.1.2.3","user_agent":"curl/8.4.0"}',
    CURLOPT_HTTPHEADER => [
        "Authorization: Bearer YOUR_API_KEY",
        "Content-Type: application/json",
    ],
]);

$body = curl_exec($curl);
$status = curl_getinfo($curl, CURLINFO_RESPONSE_CODE);
curl_close($curl);

$verdict = $status === 200 ? json_decode($body, true) : null;
var_dump($verdict);

require "net/http"
require "json"

uri = URI("https://uat.conureapi.com/v1/bot-check")
request = Net::HTTP::Post.new(uri)
request["Authorization"] = "Bearer YOUR_API_KEY"
request["Content-Type"] = "application/json"
request.body = { ip: "52.1.2.3", user_agent: "curl/8.4.0" }.to_json

response = Net::HTTP.start(uri.hostname, uri.port,
                           use_ssl: uri.scheme == "https",
                           open_timeout: 5, read_timeout: 5) do |http|
  http.request(request)
end

puts JSON.parse(response.body)