27 lines
763 B
Ruby
27 lines
763 B
Ruby
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# frozen_string_literal: true
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module Middleware
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class GtmScriptNonceInjector
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def initialize(app, settings = {})
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@app = app
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end
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def call(env)
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status, headers, response = @app.call(env)
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if nonce_placeholder = headers.delete("Discourse-GTM-Nonce-Placeholder")
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nonce = SecureRandom.hex
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parts = []
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response.each { |part| parts << part.to_s.sub(nonce_placeholder, nonce) }
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%w[Content-Security-Policy Content-Security-Policy-Report-Only].each do |name|
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next if headers[name].blank?
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headers[name] = headers[name].sub("script-src ", "script-src 'nonce-#{nonce}' ")
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end
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[status, headers, parts]
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else
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[status, headers, response]
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end
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end
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end
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end
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