Get language from headers

[ngosang]

Currently you are getting the language information from the "lang" tag, but many sites doesn't have this tag and uses HTTP headers instead.
My proposal is to use the "lang" tag and if it's not available get the language from the header "Content-Language".
Example URl without tag but with header:
http://www.investopedia.com/university/introduction-stock-trader-types/pivot-traders.asp

Already reported in wallabag but they send me here => wallabag/wallabag#2978

[j0k3r]

Might be a good idea 👍
For the record:

HTTP/1.1 200 OK
Date: Tue, 14 Mar 2017 09:41:21 GMT
Server: Apache
Expires: Sun, 19 Nov 1978 05:00:00 GMT
Last-Modified: Tue, 14 Mar 2017 09:41:21 +0000
Cache-Control: no-cache, must-revalidate, post-check=0, pre-check=0
Content-Language: en
Content-Type: text/html; charset=utf-8
Vary: Accept-Encoding
ETag: W/"1489484481-gzip"
X-Varnish: 59793755 59693389
Age: 5488
Via: 1.1 varnish-v4
X-Dev: true
X-Cookie: 
X-UA-Device: desktop
X-VH: 1
X-SEM: false
X-Cache: HIT
X-Cache-Hits: 7
Transfer-Encoding: chunked
Connection: keep-alive

[nicosomb]

Useful for me because I want to know if the http headers contain "X-Frame-Options" value.