Adds support for client-side cookie identification

api/cookies.js

@@ -1,14 +1,57 @@
 const axios = require('axios');
+const puppeteer = require('puppeteer');
 const middleware = require('./_common/middleware');
 
-const handler = async (url, event, context) => {
+const getPuppeteerCookies = async (url) => {
+  const browser = await puppeteer.launch({
+    headless: 'new',
+    args: ['--no-sandbox', '--disable-setuid-sandbox'],
+  });
+
   try {
-    const response = await axios.get(url, {withCredentials: true});
-    const cookies = response.headers['set-cookie'];
-    return { cookies };
-  } catch (error) {
-    throw new Error(error.message);
+    const page = await browser.newPage();
+    const navigationPromise = page.goto(url, { waitUntil: 'networkidle2' });
+        const timeoutPromise = new Promise((_, reject) => 
+      setTimeout(() => reject(new Error('Puppeteer took too long!')), 3000)
+    );
+    await Promise.race([navigationPromise, timeoutPromise]);
+    return await page.cookies();
+  } finally {
+    await browser.close();
   }
 };
 
+const handler = async (url) => {
+  let headerCookies = null;
+  let clientCookies = null;
+
+  try {
+    const response = await axios.get(url, {
+      withCredentials: true,
+      maxRedirects: 5,
+    });
+    headerCookies = response.headers['set-cookie'];
+  } catch (error) {
+    if (error.response) {
+      return { error: `Request failed with status ${error.response.status}: ${error.message}` };
+    } else if (error.request) {
+      return { error: `No response received: ${error.message}` };
+    } else {
+      return { error: `Error setting up request: ${error.message}` };
+    }
+  }
+
+  try {
+    clientCookies = await getPuppeteerCookies(url);
+  } catch (_) {
+    clientCookies = null;
+  }
+
+  if (!headerCookies && (!clientCookies || clientCookies.length === 0)) {
+    return { skipped: 'No cookies' };
+  }
+
+  return { headerCookies, clientCookies };
+};
+
 exports.handler = middleware(handler);