discourse/lib/middleware/enforce_hostname.rb

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# frozen_string_literal: true
module Middleware
class EnforceHostname
def initialize(app, settings = nil)
@app = app
end
def call(env)
# enforces hostname to match the hostname of our connection
# this middleware lives after rails multisite so at this point
# Discourse.current_hostname MUST be canonical, enforce it so
# all Rails helpers are guarenteed to use it unconditionally and
# never generate incorrect links
env[Rack::Request::HTTP_X_FORWARDED_HOST] = nil
env[Rack::HTTP_HOST] = Discourse.current_hostname
@app.call(env)
end
end
end