Extending NGINX
 with
 (m)Ruby 

Some details about me Github: @tylerdiaz YCombinator founder ✈ Love to travel " Programming since 12 # From Puerto Rico ⚒ Backend generalist 
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Standalone web servers Rack web servers T H I N 

Standalone web servers Rack web servers T H I N 

NGINX 

What can NGINX do? 

What can NGINX do? • Load Balance – Route a request over multiple running versions of your application. 

What can NGINX do? • Load Balance – Route a request over multiple running versions of your application. • Cache – Extremely efficient caching layer. 

What can NGINX do? • Load Balance – Route a request over multiple running versions of your application. • Cache – Extremely efficient caching layer. • Resilience – Mitigate Denial of Service with rate limiting. 

What can NGINX do? • Load Balance – Route a request over multiple running versions of your application. • Cache – Extremely efficient caching layer. • Resilience – Mitigate Denial of Service with rate limiting. • HTTPS – Attach an SSL cert (https://letsecure.me/) 

What can NGINX do? • Load Balance – Route a request over multiple running versions of your application. • Cache – Extremely efficient caching layer. • Resilience – Mitigate Denial of Service with rate limiting. • HTTPS – Attach an SSL cert (https://letsecure.me/) • Service Routing – Complete a feature in a different application setup by a different team. 

What can NGINX do? • Load Balance – Route a request over multiple running versions of your application. • Cache – Extremely efficient caching layer. • Resilience – Mitigate Denial of Service with rate limiting. • SSL – Serve HTTPS by attaching a certificate via NGINX • Service Routing – Complete a feature in a different application setup by a different team. • Logging – Track your 404s. Useful for understanding a new application stack by analyzing the request/responses. 

What can NGINX do? • Load Balance – Route a request over multiple running versions of your application. • Cache – Extremely efficient caching layer. • Resilience – Mitigate Denial of Service with rate limiting. • SSL – Serve HTTPS by attaching a certificate via NGINX • Service Routing – Complete a feature in a different application setup by a different team. • Logging – Track your 404s. Useful for understanding a new application stack by analyzing the request/responses. • Access Control – Restrict access to a service by IP. 

It offers a lot of solutions to handle a visitor’s request 

What can I do by scripting NGINX? 

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(m)Ruby A lightweight implementation of Ruby. 

(m)Ruby A lightweight implementation of Ruby. 

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Black box API server #1 Black box API server #2 NGINX / mRuby 

New endpoint: About us 

Black box API server #1 Black box API server #2 NGINX / mRuby 

Black box API server #1 Black box API server #2 NGINX / mRuby 

NGINX code example nginx.conf 

NGINX code example content.rb 

XSS via blog comments 

nginx.conf 

filter.rb 

Disaster Averted 

Extracting request/ response concerns out of your application 

• Advanced caching layer • Automatically provision and manage SSL certificates • High availability • Inline critical CSS 

Go forth. 
 Intercept your requests! 
 With (m)Ruby and NGINX 

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Code available at 

Q & A 

Limitations • No access to the existing ruby gem ecosystem. • 1.9.3 syntax (named parameters coming soon!) • Can’t require files, so your code might get repetitive.