From 1e463bb3e28630749d6c5a1c64f5d42a48612157 Mon Sep 17 00:00:00 2001
From: ngosang <ngosang@hotmail.es>
Date: Wed, 20 Oct 2021 18:05:59 +0200
Subject: [PATCH] Improve Cloudflare detection

---
 src/providers/cloudflare.ts | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/providers/cloudflare.ts b/src/providers/cloudflare.ts
index ba5cea4..273abba 100644
--- a/src/providers/cloudflare.ts
+++ b/src/providers/cloudflare.ts
@@ -13,11 +13,13 @@ const CAPTCHA_SELECTORS = ['input[name="cf_captcha_kind"]'];
 export default async function resolveChallenge(url: string, page: Page, response: Response): Promise<Response> {
 
   // look for challenge and return fast if not detected
-  if (!response.headers().server.startsWith('cloudflare')) {
+  if (response.headers().server.startsWith('cloudflare') &&
+      (response.status() == 403 || response.status() == 503)) {
+    log.info('Cloudflare detected');
+  } else {
     log.info('Cloudflare not detected');
     return response;
   }
-  log.info('Cloudflare detected');
 
   if (await findAnySelector(page, BAN_SELECTORS)) {
     throw new Error('Cloudflare has blocked this request. Probably your IP is banned for this site, check in your web browser.')