这都是关于前端cookie 的,我将首先向您展示如何处理请求,逻辑将与 Scrapy 完全相同:
head = { "User-Agent": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:47.0) Gecko/20100101 Firefox/47.0"}
#
import requests
from bs4 import BeautifulSoup
with requests.Session() as s:
soup = BeautifulSoup(s.get("https://www.mooda.com/en/").content)
r2 = s.get(soup.select_one("#selectCurrency option[value*=SAR]")["value"])
r = s.get("https://www.mooda.com/en/", params={"currency": "sar"}, headers=head, cookies=dict(r2.cookies.items()))
soup2 = BeautifulSoup(r.content)
print(soup2.select_one(".price").text)
您需要使用 id 向选项下的 url 发出请求selectCurrency
,然后将发出请求时返回的 cookie 传递给https://www.mooda.com/en?currency=sar
. 没有帖子,都是 get 请求,但 get 的前端cookie 是必不可少的。
如果我们运行代码,您会看到它确实为我们提供了正确的数据:
In [9]: with requests.Session() as s:
...: soup = BeautifulSoup(s.get("https://www.mooda.com/en/").content,"lxml")
...: r2 = s.get(soup.select_one("#selectCurrency option[value*=SAR]")["value"])
...: r = s.get("https://www.mooda.com/en/", params={"currency": "sar"}, headers=head, cookies=dict(r2.cookies.items()))
...: soup2 = BeautifulSoup(r.content,"lxml")
...: print(soup2.select_one(".price").text)
...:
825 SR
使用scrapy:
class S(Spider):
name = "foo"
allowed_domains = ["www.mooda.com"]
start_urls = ["https://www.mooda.com/en"]
def parse(self, resp):
curr = resp.css("#selectCurrency option[value*='SAR']::attr(value)").extract_first()
return Request(curr, callback=self.parse2)
def parse2(self, resp):
print( resp.headers.getlist('Set-Cookie'))
return Request("https://www.mooda.com/en?currency=sar",cookies=cookies, callback=self.parse3)
def parse3(self, resp):
print(resp.css('.price').xpath('text()').extract())
如果你跑步会给你:
['frontend=c95er9h1at2srhtqu5rkfo13g0; expires=Wed, 28-Jun-2017 08:56:08 GMT; path=/; domain=www.mooda.com', 'currency=SAR; expires=Wed, 28-Jun-2017 08:56:08 GMT; path=/; domain=www.mooda.com']
[u'825 SR', u'1,575 SR', u'1,181 SR', u'4,377 SR', u'769 SR']
get to curr 什么都不返回,它只是设置 cookie