From 5f7f198a68ff497e7a887b9eebbfe3637066d016 Mon Sep 17 00:00:00 2001
From: Vu Tran <baysao@users.noreply.github.com>
Date: Sun, 13 Oct 2019 23:45:45 +0700
Subject: [PATCH] Update crawler.js

---
 lib/crawler.js | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/lib/crawler.js b/lib/crawler.js
index d5b37bb..48c0ab5 100644
--- a/lib/crawler.js
+++ b/lib/crawler.js
@@ -397,8 +397,11 @@ Crawler.prototype._onContent = function _onContent (error, options, response) {
 
 	var injectableTypes = ['html','xhtml','text/xml', 'application/xml', '+xml'];
 	if (!options.html && !typeis(contentType(response), injectableTypes)){
-		log('warn','response body is not HTML, skip injecting. Set jQuery to false to suppress this message');
-		return options.callback(null,response,options.release);
+		// in case gzip, content-type is undefined, we can test first 100 bytes for tag html
+		if(!/\<html/.test(response.body.substring(0,100))){
+			log('warn','response body is not HTML, skip injecting. Set jQuery to false to suppress this message');
+			return options.callback(null,response,options.release);
+		}
 	}
 
 	log('debug','Injecting');