Using Passenger with Prerender.io

[Paolo Memoli]

Hi, has anyone had any experience using passenger with prerender?

Prerender's default nginx configs dont play nice with passenger:

https://gist.github.com/thoop/8165802

eg:

server {
    listen 80;
    server_name example.com;
 
    root   /path/to/your/root;
    index  index.html;
 
    location / {
        try_files $uri @prerender;
    }
 
    location @prerender {
        #proxy_set_header X-Prerender-Token YOUR_TOKEN;
        
        set $prerender 0;
        if ($http_user_agent ~* "baiduspider|twitterbot|facebookexternalhit|rogerbot|linkedinbot|embedly|quora link preview|showyoubot|outbrain|pinterest|slackbot|vkShare|W3C_Validator") {
            set $prerender 1;
        }
        if ($args ~ "_escaped_fragment_") {
            set $prerender 1;
        }
        if ($http_user_agent ~ "Prerender") {
            set $prerender 0;
        }
        if ($uri ~ "\.(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)") {
            set $prerender 0;
        }
        
        #resolve using Google's DNS server to force DNS resolution and prevent caching of IPs
        resolver 8.8.8.8;
 
        if ($prerender = 1) {
            
            #setting prerender as a variable forces DNS resolution since nginx caches IPs and doesnt play well with load balancing
            set $prerender "service.prerender.io";
            rewrite .* /$scheme://$host$request_uri? break;
            proxy_pass http://$prerender;
        }
        if ($prerender = 0) {
            rewrite .* /index.html break;
        }
    }
}

anyone got an example work nginx config with passenger we can look at?

Thanks

[Hongli Lai]

What do you mean with "don't play nice"? What is the expected behavior
and what is the actual behavior?

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[Paolo Memoli]

As in, does someone have an example nginx.conf which combines prerender's sample nginx config with passenger's nginx conf?

Using 'passenger_enabled on;' writes alot of the nginx config, prerender's service only works by using providing middleware via an nginx config, and I'm unsure how the two can be combined