Python爬虫：scrapy-splash的请求头和代理参数设置

function main(splash, args)
  -- 设置代理          
  splash:on_request(function(request)
        request:set_proxy{
          host = "27.0.0.1",
          port = 8000,
      }
    end)
    -- 设置请求头
    splash:set_user_agent("Mozilla/5.0")
    -- 自定义请求头
   splash:set_custom_headers({
    ["Accept"] = "application/json, text/plain, */*"
    })
    splash:go("https://www.baidu.com/")
    return splash:html()

def start_requests(self):
    for url in self.start_urls:
        yield SplashRequest(url,
            endpoint='execute',
            args={'wait': 5,
                  'lua_source': source，
                  'proxy': 'http://proxy_ip:proxy_port'
                  }

class ProxyMiddleware(object):
      def process_request(self, request, spider):
        request.meta['splash']['args']['proxy'] = proxyServer
        request.headers["Proxy-Authorization"] = proxyAuth