Selenium을 Scrapy와 어떻게 통합하여 동적 페이지를 스크랩할 수 있습니까?

import scrapy
from selenium import webdriver

class ProductSpider(scrapy.Spider):
    name = "product_spider"
    allowed_domains = ['example.com']
    start_urls = ['http://example.com/shanghai']
    
    def __init__(self):
        self.driver = webdriver.Firefox()

def parse(self, response):
    self.driver.get(response.url)
    next = self.driver.find_element_by_xpath('//td[@class="pagn-next"]/a')
    next.click()

# scrapy.cfg
DOWNLOADER_MIDDLEWARES = {
    'scrapyjs.SplashMiddleware': 580,
}

# my_spider.py
class MySpider(scrapy.Spider):
    name = 'my_spider'
    start_urls = ['http://example.com/dynamic']
    
    def parse(self, response):
        script = 'function() { return document.querySelectorAll("div.product-info").length; }'
        return Request(url=response.url, callback=self.parse_product, meta={'render_javascript': True, 'javascript': script})

    def parse_product(self, response):
        product_count = int(response.xpath('//*[@data-scrapy-meta]/text()').extract_first())