Scrapy如何在爬蟲過程中自動登入？

    def parse(self,response):
        return scrapy.FormRequest.from_response(
            response,
            formdata={'username': 'your_username', 'password': 'your_password'},
            callback=self.start_scraping
        )

    def start_scraping(self, response):
        # Get CSRF token
        token = response.css('input[name="csrf_token"]::attr(value)').extract_first()
        logging.info('CSRF token obtained: ' + token)

        # Create cookie dict
        cookie = response.headers.getlist('Set-Cookie')
        cookie = [str(c, 'utf-8') for c in cookie]
        cookie_dict = {
            str(c.split('; ')[0].split('=')[0]): str(c.split('; ')[0].split('=')[1])
            for c in cookie
        }

        # Store cookie dict in spider settings
        self.settings.set('COOKIE_DICT', cookie_dict, priority='cmdline')

        # Start scraping main website
        yield scrapy.Request(
            url='https://www.example.com/your/start/url/',
            callback=self.parse_homepage,
            headers={'Cookie': cookie}
        )

    def start_requests(self):
        cookie = self.settings.get('COOKIE_DICT')
        yield scrapy.Request(
            url='https://www.example.com/your/start/url/',
            callback=self.parse_homepage,
            headers={'Cookie': cookie},
            meta={'login': True}
        )

    class MySpider(scrapy.Spider):
    name = 'myspider'

    def start_requests(self):
        yield scrapy.Request('https://www.example.com/real-target-url/', callback=self.parse, headers={'Cookie': self.settings.get('COOKIE_DICT')})

    def parse(self, response):
        # Do whatever you want with the authenticated response