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@roylines
Last active July 15, 2023 02:45
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haproxy configuration for using with prerender.io
# Change YOUR_TOKEN to your prerender token
# Change http://example.com (server_name) to your website url
frontend my-frontend
mode http
bind :80
# prerender.io
acl user-agent-bot hdr_sub(User-Agent) -i baiduspider twitterbot facebookexternalhit rogerbot linkedinbot embedly showyoubot outbrain pinterest slackbot vkShare W3C_Validator
acl url-asset path_end js css xml less png jpg jpeg gif pdf doc txt ico rss zip mp3 rar exe wmv doc avi ppt mpg mpeg tif wav mov psd ai xls mp4 m4a swf dat dmg iso flv m4v torrent ttf woff
acl url-escaped-fragment url_sub _escaped_fragment_
use_backend prerender if user-agent-bot !url-asset
use_backend prerender if url-escaped-fragment !url-asset
backend prerender
mode http
timeout server 20s
server prerender service.prerender.io:443 check ssl verify none
http-request set-header X-Prerender-Token YOUR_TOKEN
reqrep ^([^\ ]*)\ /(.*)$ \1\ /http://example.com/\2
@gzurbach
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gzurbach commented Feb 15, 2021

For those looking at migrating over to HAProxy 2.1 and above, the configuration file below is what we're using in production. It contains a few crucial additions such as the resolvers dns section to keep HAProoxy happy. Cheers!

# Important: Prerender's IP address changes regularly. This ensures HAProxy always resolves the new IP.
resolvers dns
    parse-resolv-conf
    hold valid 10s

frontend my-frontend
    mode http
    bind *:80

    # Detect bot crawlers looking for pre-rendered pages
    acl user-agent-bot hdr_sub(User-Agent) -i googlebot bingbot baiduspider twitterbot facebookexternalhit rogerbot linkedinbot embedly showyoubot outbrain pinterest slackbot whatsapp vkShare W3C_Validator
    acl url-asset path_end js css xml less png jpg jpeg gif pdf doc txt ico

    use_backend prerender if user-agent-bot !url-asset

backend prerender
    mode http
    server prerender service.prerender.io:443 resolvers dns check ssl verify none # Note the "resolvers dns" here
    http-request set-header X-Prerender-Token YOUR_TOKEN
    http-request set-uri /http://example.com%[path] # set-uri will remove the query string, use set-path if you want to keep it

@varrocs
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varrocs commented Nov 24, 2021

Updated user-agent list

acl user-agent-bot hdr_sub(User-Agent) -i googlebot bingbot baiduspider twitterbot facebookexternalhit rogerbot linkedinbot embedly showyoubot outbrain pinterest slackbot whatsapp vkShare W3C_Validator redditbot Applebot whatsapp flipboard tumblr bitlybot skypeuripreview nuzzel discordbot google page speed qwantify pinterestbot bitrix link preview xing-contenttabreceiver chrome-lighthouse telegrambot

@GimpMaster
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2023, I used a combination of these comments and got it working. Thank you community.

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