无法从网页中获取不同供应商的名称

Question

我在 python 中创建了一个脚本，使用发布请求从网页中获取不同供应商的名称，但不幸的是，我遇到了这个错误AttributeError: 'NoneType' object has no attribute 'text'，而我发现我以正确的方式做事。网站链接要填充内容，需要像在图像中看到的那样单击搜索按钮。到目前为止我已经尝试过：import requestsfrom bs4 import BeautifulSoupurl = "https://www.gebiz.gov.sg/ptn/supplier/directory/index.xhtml"r = requests.get(url)soup = BeautifulSoup(r.text,"lxml")payload = {    'contentForm': 'contentForm',    'contentForm:j_idt225_listButton2_HIDDEN-INPUT': '',    'contentForm:j_idt161_inputText': '',    'contentForm:j_idt164_SEARCH': '',    'contentForm:j_idt167_selectManyMenu_SEARCH-INPUT': '',    'contentForm:j_idt167_selectManyMenu-HIDDEN-INPUT': '',    'contentForm:j_idt167_selectManyMenu-HIDDEN-ACTION-INPUT': '',    'contentForm:search': 'Search',    'contentForm:j_idt185_select': 'SUPPLIER_NAME',    'javax.faces.ViewState': soup.select_one('[id="javax.faces.ViewState"]')['value']}res = requests.post(url,data=payload,headers={    'Content-Type': 'application/x-www-form-urlencoded',    'User-Agent': 'Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.103 Safari/537.36'    })sauce = BeautifulSoup(res.text,"lxml")item = sauce.select_one(".form2_ROW").textprint(item)只有这部分也可以： 8121 results found.完整追溯：Traceback (most recent call last):  File "C:\Users\WCS\AppData\Local\Programs\Python\Python37-32\general_demo.py", line 27, in <module>    item = sauce.select_one(".form2_ROW").textAttributeError: 'NoneType' object has no attribute 'text'

Answer 1

您需要找到获取 cookie 的方法。以下内容目前适用于我的多个请求。

import requests

from bs4 import BeautifulSoup

url = "https://www.gebiz.gov.sg/ptn/supplier/directory/index.xhtml"

headers = {

    'Content-Type': 'application/x-www-form-urlencoded',

    'User-Agent': 'Mozilla/5.0',

    'Referer' : 'https://www.gebiz.gov.sg/ptn/supplier/directory/index.xhtml',

    'Accept' : 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8',

    'Accept-Encoding' : 'gzip, deflate, br',

    'Accept-Language' : 'en-US,en;q=0.9',

    'Cache-Control' : 'max-age=0',

    'Connection' : 'keep-alive',

    'Cookie' : '__cfduid=d3fe47b7a0a7f3ef307c266817231b5881555951761; wlsessionid=pFpF87sa9OCxQhUzwQ3lXcKzo04j45DP3lIVYylizkFMuIbGi6Ka!1395223647; BIGipServerPTN2_PRD_Pool=52519072.47873.0000'

}

with requests.Session() as s:

    r = s.get(url, headers= headers)

    soup = BeautifulSoup(r.text,"lxml")

    payload = {

        'contentForm': 'contentForm',

        'contentForm:search': 'Search',

        'contentForm:j_idt185_select': 'SUPPLIER_NAME',

        'javax.faces.ViewState': soup.select_one('[id="javax.faces.ViewState"]')['value']

    }

    res = s.post(url,data=payload,headers= headers)

    sauce = BeautifulSoup(res.text,"lxml")

    item = sauce.select_one(".formOutputText_HIDDEN-LABEL.outputText_TITLE-BLACK").text

    print(item)