python scrapy模拟登录的方法

# -*- coding: utf-8 -*-
import scrapy
import re
 
class GithubLoginSpider(scrapy.Spider):
    name = 'github_login'
    allowed_domains = ['github.com']
    start_urls = ['https://github.com/login']
 
    def parse(self, response): # 发送Post请求获取Cookies
        authenticity_token = response.xpath('//input[@name="authenticity_token"]/@value').extract_first()
        utf8 = response.xpath('//input[@name="utf8"]/@value').extract_first()
        commit = response.xpath('//input[@name="commit"]/@value').extract_first()
        form_data = {
            'login': 'pengjunlee@163.com',
            'password': '123456',
            'webauthn-support': 'supported',
            'authenticity_token': authenticity_token,
            'utf8': utf8,
            'commit': commit}
        yield scrapy.FormRequest("https://github.com/session", formdata=form_data, callback=self.after_login)
 
    def after_login(self, response): # 验证是否请求成功
        print(re.findall('Learn Git and GitHub without any code!', response.body.decode()))