豆瓣网post 爬取带验证码

# -*- coding: utf- -*-
import scrapy
import requests
from ..bao.jiema import get_number

fromdata = {
"source": "movie",
"redir": "https://movie.douban.com/",
"form_email": "账号",
"form_password": "密码",
"login": "登录"
}

class BanSpider(scrapy.Spider):
    name = 'ban'
    # allowed_domains = ['ban']
    start_urls= ['https://www.douban.com/accounts/login?source=movie']
    def parse(self, response):
        print(response.url)
        images = response.xpath('//*[@id="captcha_image"]/@src').extract_first()
        all_id = response.xpath('//*[@id="lzform"]/div[5]/div/div/input[2]/@value').extract_first()
        if images:

            with open('a.jpg', 'wb+')as f:
                response1 = requests.get(url=images)
                f.write(response1.content)
            fromdata['captcha-id'] = all_id

            fromdata["captcha-solution"] = get_number()
        print(fromdata)
        urls = response.url
        yield scrapy.FormRequest(urls, formdata=fromdata, callback=self.after_login)
    def after_login(self,response):
        all_title = response.xpath('//*[@id="db-global-nav"]/div/div[1]/ul/li[2]/a/span[1]/text()').extract()
        print(all_title)