无法从网页中获取不同供应商的名称

Question

我已经在python中创建了一个脚本，使用post请求从网页中获取不同供应商的名称，但不幸的是我收到了这个错误AttributeError: 'NoneType' object has no attribute 'text'，而我发现我以正确的方式做了一些事情。

websitelink

要填充内容，需要单击搜索按钮，就像在图像中看到的那样。

我到目前为止尝试过：

import requests
from bs4 import BeautifulSoup

url = "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").text
print(item)

只有这一部分也会这样做：8121 results found.

完全追溯：

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").text
AttributeError: 'NoneType' object has no attribute 'text'

Answer 1

你需要找到一种获取cookie的方法。以下内容目前适用于多个请求。

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)