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Home/ Questions/Q 6387711
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Editorial Team
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Editorial Team
Asked: May 25, 20262026-05-25T03:11:12+00:00 2026-05-25T03:11:12+00:00

Inspired by the RailsCast on HTTP Streaming , I’ve decided to turn it on

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Inspired by the RailsCast on HTTP Streaming, I’ve decided to turn it on on my server. However, the listen 3000 :tcp_nopush => false line that Ryan suggests adding to my unicorn.rb doesn’t play well with Heroku (they don’t let you specify a port). Is streaming supported on Heroku, and how do I turn it on?

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  1. Editorial Team
    Editorial Team
    2026-05-25T03:11:13+00:00Added an answer on May 25, 2026 at 3:11 am

    Heroku tells your application what port to listen on via the environment variable PORT. Check for this environment variable in your unicorn.rb.

    port = ENV["PORT"].to_i
    listen port, :tcp_nopush => false
    
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