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class ForwardHost < Rack::Proxy
def rewrite_env(env)
env["HTTP_HOST"] = "example.com"
env
end
def rewrite_response(triplet)
status, headers, body = triplet
# example of inserting an additional header
headers["X-Foo"] = "Bar"
# if you rewrite env, it appears that content-length isn't calculated correctly
# resulting in only partial responses being sent to users
# you can remove it or recalculate it here
headers["content-length"] = nil
triplet
end
end
Rails.application.config.middleware.use ForwardHost, backend: 'http://example.com', streaming: false
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