# File lib/rack/conditionalget.rb, line 22 22: def call(env) 23: return @app.call(env) unless %w[GET HEAD].include?(env['REQUEST_METHOD']) 24: 25: status, headers, body = @app.call(env) 26: headers = Utils::HeaderHash.new(headers) 27: if etag_matches?(env, headers) || modified_since?(env, headers) 28: status = 304 29: headers.delete('Content-Type') 30: headers.delete('Content-Length') 31: body = [] 32: end 33: [status, headers, body] 34: end