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[英]Response [403] Error with Python Requests after adding user-agent and additional headers, Cloudfare blocking access
[英]Access denied - python selenium - even after using User-Agent and other headers
使用 python,我试图提取 NSE 交易所在https://www.nseindia.com/option-chain 上公开发布的期权链 data.table
尝试使用请求 session 以及 selenium,但不知何故网站不允许使用机器人提取数据。
以下是所做的尝试:
有什么明显的我想念的吗? 或者网站将尽一切努力阻止使用 selenium/requests + python 从网站自动提取数据? 无论哪种情况,我如何提取这些数据?
下面是我当前的代码:(从https://www.nseindia.com/option-chain获取表格内容)
from selenium import webdriver
from selenium.webdriver.chrome.options import Options
opts = Options()
opts.add_argument("user-agent=Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.157 Safari/537.36")
opts.add_argument("Accept-Language=en-US,en;q=0.5")
opts.add_argument("Accept=text/html")
driver = webdriver.Chrome(executable_path="C:\\chromedriver.exe",chrome_options=opts)
#driver.get('https://www.nseindia.com/api/csrf-token')
driver.get('https://www.nseindia.com/')
#driver.get('https://www.nseindia.com/api/option-chain-indices?symbol=NIFTY')
driver.get('https://www.nseindia.com/option-chain')
数据是通过 Javascript 从外部 URL 加载的。但是你需要先加载 cookies 访问其他 URL:
import json
import requests
from bs4 import BeautifulSoup
symbol = 'NIFTY'
headers = {'User-Agent': 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:80.0) Gecko/20100101 Firefox/80.0'}
url = 'https://www.nseindia.com/api/option-chain-indices?symbol=' + symbol
with requests.session() as s:
# load cookies:
s.get('https://www.nseindia.com/get-quotes/derivatives?symbol=' + symbol, headers=headers)
# get data:
data = s.get(url, headers=headers).json()
# print data to screen:
print(json.dumps(data, indent=4))
印刷:
{
"records": {
"expiryDates": [
"03-Sep-2020",
"10-Sep-2020",
"17-Sep-2020",
"24-Sep-2020",
"01-Oct-2020",
"08-Oct-2020",
"15-Oct-2020",
"22-Oct-2020",
"29-Oct-2020",
"26-Nov-2020",
"31-Dec-2020",
"25-Mar-2021",
"24-Jun-2021",
"30-Dec-2021",
"30-Jun-2022",
"29-Dec-2022",
"29-Jun-2023"
],
"data": [
{
"strikePrice": 4600,
"expiryDate": "31-Dec-2020",
"PE": {
"strikePrice": 4600,
"expiryDate": "31-Dec-2020",
"underlying": "NIFTY",
"identifier": "OPTIDXNIFTY31-12-2020PE4600.00",
"openInterest": 19,
"changeinOpenInterest": 0,
"pchangeinOpenInterest": 0,
"totalTradedVolume": 0,
"impliedVolatility": 0,
"lastPrice": 31,
"change": 0,
"pChange": 0,
"totalBuyQuantity": 10800,
"totalSellQuantity": 0,
"bidQty": 900,
"bidprice": 3.05,
"askQty": 0,
"askPrice": 0,
"underlyingValue": 11647.6
}
},
{
"strikePrice": 5000,
"expiryDate": "31-Dec-2020",
...and so on.
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