一、前言
每到年底国债逆回购的利息都会来一波高涨，利息会比银行的T+0的理财产品的利息高，所以可以考虑写个脚本每天定时启动爬取逆回购数据，实时查看利息，然后在利息高位及时去下单。
二、环境搭建
详情请看《python爬虫进阶篇：Scrapy中使用Selenium模拟Firefox火狐浏览器爬取网页信息》
三、代码实现
- items
python
class BondSpiderItem(scrapy.Item):
# define the fields for your item here like:
# name = scrapy.Field()
# 股票代码
bond_code = scrapy.Field()
# 股票名称
bond_name = scrapy.Field()
# 最新价
last_price = scrapy.Field()
# 涨跌幅
rise_fall_rate = scrapy.Field()
# 涨跌额
rise_fall_price = scrapy.Field()- middlewares
python
def __init__(self):
# ----------------firefox的设置------------------------------- #
self.options = firefox_options()
def spider_opened(self, spider):
spider.logger.info('Spider opened: %s' % spider.name)
spider.driver = webdriver.Firefox(options=self.options) # 指定使用的浏览器
def process_request(self, request, spider):
# Called for each request that goes through the downloader
# middleware.
# Must either:
# - return None: continue processing this request
# - or return a Response object
# - or return a Request object
# - or raise IgnoreRequest: process_exception() methods of
# installed downloader middleware will be called
spider.driver.get(request.url)
return None
def process_response(self, request, response, spider):
# Called with the response returned from the downloader.
# Must either;
# - return a Response object
# - return a Request object
# - or raise IgnoreRequest
response_body = spider.driver.page_source
return HtmlResponse(url=request.url, body=response_body, encoding='utf-8', request=request)- settings设置
python
SPIDER_MIDDLEWARES = {
'bond_spider.middlewares.BondSpiderSpiderMiddleware': 543,
}
DOWNLOADER_MIDDLEWARES = {
'bond_spider.middlewares.BondSpiderDownloaderMiddleware': 543,
}
ITEM_PIPELINES = {
'bond_spider.pipelines.BondSpiderPipeline': 300,
}- middlewares中间件
python
from selenium.webdriver.firefox.options import Options as firefox_options
spider.driver = webdriver.Firefox(options=firefox_options()) # 指定使用的浏览器- spider文件
python
def parse(self, response):
# 股票代码
bond_code = response.css("table.table_wrapper-table tbody tr td:nth-child(2) a::text").extract()
# 股票名称
bond_name = response.css("table.table_wrapper-table tbody tr td:nth-child(3) a::text").extract()
# 最新价
last_price = response.css("table.table_wrapper-table tbody tr td:nth-child(4) span::text").extract()
# 涨跌幅
rise_fall_rate = response.css("table.table_wrapper-table tbody tr td:nth-child(6) span::text").extract()
# 涨跌额
rise_fall_price = response.css("table.table_wrapper-table tbody tr td:nth-child(5) span::text").extract()
for i in range(len(bond_code)):
item = BondSpiderItem()
item["bond_code"] = bond_code[i]
item["bond_name"] = bond_name[i]
item["last_price"] = last_price[i]
item["rise_fall_rate"] = rise_fall_rate[i]
item["rise_fall_price"] = rise_fall_price[i]
yield item
print()
def close(self, spider):
spider.driver.quit()- pipelines持久化
python
def __init__(self):
self.html = '<html><head><meta charset="utf-8"></head><body><table>'
self.html = self.html + '<tr>'
self.html = self.html + '<td>%s</td>' % "代码"
self.html = self.html + '<td>%s</td>' % "名称"
self.html = self.html + '<td>%s</td>' % "最新价"
self.html = self.html + '<td>%s</td>' % "涨跌幅"
self.html = self.html + '<td>%s</td>' % "涨跌额"
self.html = self.html + '</tr>'
def process_item(self, item, spider):
self.html = self.html + '<tr>'
self.html = self.html + '<td>%s</td>' % item["bond_code"]
self.html = self.html + '<td>%s</td>' % item["bond_name"]
self.html = self.html + '<td>%s</td>' % item["last_price"]
self.html = self.html + '<td>%s</td>' % item["rise_fall_rate"]
self.html = self.html + '<td>%s</td>' % item["rise_fall_price"]
self.html = self.html + '</tr>'
return item
def close_spider(self, spider):
self.html = self.html + '</table></body></html>'
self.send_email(self.html)
print()
def send_email(self, html):
# 设置邮箱账号
account = "xxx"
# 设置邮箱授权码
token = "xxx"
# 实例化smtp对象，设置邮箱服务器，端口
smtp = smtplib.SMTP_SSL('smtp.qq.com', 465)
# 登录qq邮箱
smtp.login(account, token)
# 添加正文，创建简单邮件对象
email_content = MIMEText(html, 'html', 'utf-8')
# 设置发送者信息
email_content['From'] = 'xxx'
# 设置接受者信息
email_content['To'] = '技术总是日积月累的'
# 设置邮件标题
email_content['Subject'] = '来自code_space的一封信'
# 发送邮件
smtp.sendmail(account, 'xxx', email_content.as_string())
# 关闭邮箱服务
smtp.quit()四、测试结果
