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{% set domain = "233233.xyz" %}
#
# nginx/sites: reverse proxy to DuckDuckGo: duckduckgo.com
#
# Aaron LI
# 2018-12-01
#
{% if domains_hascert[domain] %}
server {
listen 443 ssl http2;
listen [::]:443 ssl http2;
server_name d.{{ domain }};
# SSL/TLS Certificate kindly provided by Let's Encrypt
ssl_certificate {{ web.ssl_root }}/{{ domain }}/fullchain;
ssl_certificate_key {{ web.ssl_root }}/{{ domain }}/key;
# Enable caching
#proxy_cache CACHE;
# Replace cookie domain
proxy_cookie_domain duckduckgo.com $host;
# Hide some upstream headers to avoid duplicates/overrideing
proxy_hide_header Strict-Transport-Security;
proxy_hide_header Content-Security-Policy;
proxy_hide_header X-Frame-Options;
proxy_hide_header X-XSS-Protection;
proxy_hide_header X-Content-Type-Options;
proxy_hide_header Referrer-Policy;
# Substitute links in contents
# NOTE: Require to set Accept-Encoding="" header in order to request
# *uncompressed* data from upstream, otherwise won't work!
sub_filter_types text/css text/javascript application/json;
sub_filter_once off;
sub_filter //duckduckgo.com/ //$host/;
sub_filter //proxy.duckduckgo.com/ //$host/__proxy/;
# Reverse proxy to duckduckgo.com
location / {
proxy_pass https://duckduckgo.com;
proxy_set_header Host duckduckgo.com;
proxy_set_header Referer https://duckduckgo.com;
# NOTE: Set `Accept-Encoding=""` to request *uncompressed* data
# from upstream, so that `sub_filter` works.
{% block proxy_set_header_common %}
proxy_set_header User-Agent $http_user_agent;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_set_header Cookie "";
proxy_set_header Accept-Encoding "";
proxy_set_header Accept-Language $http_accept_language;
{% endblock %}
}
# `/__proxy/` -> `proxy.duckduckgo.com`
location ^~ /__proxy/ {
proxy_pass https://proxy.duckduckgo.com;
proxy_set_header Host proxy.duckduckgo.com;
proxy_set_header Referer https://proxy.duckduckgo.com;
{{ self.proxy_set_header_common() }}
}
# Forbid spider
if ($http_user_agent ~* "qihoobot|Baiduspider|Googlebot|Googlebot-Mobile|Googlebot-Image|Mediapartners-Google|Adsbot-Google|Feedfetcher-Google|Yahoo! Slurp|Yahoo! Slurp China|YoudaoBot|Sosospider|Sogou spider|Sogou web spider|MSNBot|ia_archiver|Tomato Bot") {
return 403;
}
location /robots.txt {
default_type text/plain;
return 200 "User-agent: *\nDisallow: /\n";
}
}
{% endif %}
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