first of all - i hope you are all right and all goes well.
I want to scrape a website that requires login with password first, how can I start scraping it with python using beautifulsoup4 library?
Below is what I do at the moment:
import requests
from bs4 import BeautifulSoup as BS
session = requests.Session()
session.headers.update({'User-Agent': 'Mozilla/5.0'}) # this page needs header 'User-Agent`
url = 'https://wordpress.org//{}/'
for page in range(1, 3):
print('\n--- PAGE:', page, '---\n')
# read page with list of posts
r = session.get(url.format(page))
but what should i do to login to Wordpress-support forums?
Note my parser-job requires login.
I found some options and i have had a closer look at - here i have added them
the first of several methods: see this way:
from bs4 import BeautifulSoup
import urllib2
url = urllib2.urlopen("http://www.python.org")
content = url.read()
soup = BeautifulSoup(content)
How should the code be changed to accommodate login? Assume that the website I want to scrape is a forum that requires login. An example is http://forum.arduino.cc/index.php
# Login to website using just Python 3 Standard Library
import urllib.parse
import urllib.request
import http.cookiejar
def scraper_login():
####### change variables here, like URL, action URL, user, pass
# your base URL here, will be used for headers and such, with and without https://
base_url = 'www.example.com'
https_base_url = 'https://' + base_url
# here goes URL that's found inside form action='.....'
# adjust as needed, can be all kinds of weird stuff
authentication_url = https_base_url + '/login'
# username and password for login
username = 'yourusername'
password = 'SoMePassw0rd!'
# we will use this string to confirm a login at end
check_string = 'Logout'
####### rest of the script is logic
# but you will need to tweak couple things maybe regarding "token" logic
# (can be _token or token or _token_ or secret ... etc)
# big thing! you need a referer for most pages! and correct headers are the key
headers={"Content-Type":"application/x-www-form-urlencoded",
"User-agent":"Mozilla/5.0 Chrome/81.0.4044.92", # Chrome 80+ as per web search
"Host":base_url,
"Origin":https_base_url,
"Referer":https_base_url}
# initiate the cookie jar (using : http.cookiejar and urllib.request)
cookie_jar = http.cookiejar.CookieJar()
opener = urllib.request.build_opener(urllib.request.HTTPCookieProcessor(cookie_jar))
urllib.request.install_opener(opener)
and so forht
scraper_login()
a method that gets us there without selenium or mechanize, or other 3rd party tools, albeit it is semi-automated. Basically, when we login into a site in a normal way, we identify ourself in a unique way using the credentials, and the same identity is used thereafter for every other interaction, which is stored in cookies and headers, for a brief period of time.
What we need to do is use the same cookies and headers when we make our http requests, and we'll be in.
To replicate that, follow these steps:
In the browser, open the developer tools
we go to the site, and login
After the login, go to the network tab, and then refresh the page
At this point, we should see a list of requests, the top one being the actual site - and that will be our focus, because it contains the data with the identity we can use for Python and BeautifulSoup to scrape it: we now can right click the site request (the top one), hover over copy, and then copy as cURL ...
Question
tarifa
dear experts,
first of all - i hope you are all right and all goes well.
I want to scrape a website that requires login with password first, how can I start scraping it with python using beautifulsoup4 library?
Below is what I do at the moment:
import requests from bs4 import BeautifulSoup as BS session = requests.Session() session.headers.update({'User-Agent': 'Mozilla/5.0'}) # this page needs header 'User-Agent` url = 'https://wordpress.org//{}/' for page in range(1, 3): print('\n--- PAGE:', page, '---\n') # read page with list of posts r = session.get(url.format(page))but what should i do to login to Wordpress-support forums?
Note my parser-job requires login.
I found some options and i have had a closer look at - here i have added them
the first of several methods: see this way:
from bs4 import BeautifulSoup import urllib2 url = urllib2.urlopen("http://www.python.org") content = url.read() soup = BeautifulSoup(content) How should the code be changed to accommodate login? Assume that the website I want to scrape is a forum that requires login. An example is http://forum.arduino.cc/index.phpor should i use mechanize:
import mechanize from bs4 import BeautifulSoup import urllib2 import cookielib cj = cookielib.CookieJar() br = mechanize.Browser() br.set_cookiejar(cj) br.open("https://id.arduino.cc/auth/login/") br.select_form(nr=0) br.form['username'] = 'username' br.form['password'] = 'password.' br.submit() print br.response().read()besides this we also can go this way:
# Login to website using just Python 3 Standard Library import urllib.parse import urllib.request import http.cookiejar def scraper_login(): ####### change variables here, like URL, action URL, user, pass # your base URL here, will be used for headers and such, with and without https:// base_url = 'www.example.com' https_base_url = 'https://' + base_url # here goes URL that's found inside form action='.....' # adjust as needed, can be all kinds of weird stuff authentication_url = https_base_url + '/login' # username and password for login username = 'yourusername' password = 'SoMePassw0rd!' # we will use this string to confirm a login at end check_string = 'Logout' ####### rest of the script is logic # but you will need to tweak couple things maybe regarding "token" logic # (can be _token or token or _token_ or secret ... etc) # big thing! you need a referer for most pages! and correct headers are the key headers={"Content-Type":"application/x-www-form-urlencoded", "User-agent":"Mozilla/5.0 Chrome/81.0.4044.92", # Chrome 80+ as per web search "Host":base_url, "Origin":https_base_url, "Referer":https_base_url} # initiate the cookie jar (using : http.cookiejar and urllib.request) cookie_jar = http.cookiejar.CookieJar() opener = urllib.request.build_opener(urllib.request.HTTPCookieProcessor(cookie_jar)) urllib.request.install_opener(opener) and so forht scraper_login()see more here https://stackoverflow.com/questions/23102833/how-to-scrape-a-website-which-requires-login-using-python-and-beautifulsoup
but there is even a simpler way,
a method that gets us there without selenium or mechanize, or other 3rd party tools, albeit it is semi-automated. Basically, when we login into a site in a normal way, we identify ourself in a unique way using the credentials, and the same identity is used thereafter for every other interaction, which is stored in cookies and headers, for a brief period of time.
What we need to do is use the same cookies and headers when we make our http requests, and we'll be in.
To replicate that, follow these steps:
In the browser, open the developer tools
we go to the site, and login
After the login, go to the network tab, and then refresh the page
At this point, we should see a list of requests, the top one being the actual site - and that will be our focus, because it contains the data with the identity we can use for Python and BeautifulSoup to scrape it: we now can right click the site request (the top one), hover over copy, and then copy as cURL ...
What do you suggest bere?
look forward to hear from you
Edited by tarifaLink to comment
https://www.neowin.net/forum/topic/1396703-how-to-add-a-login-to-a-bs4-parser-script/Share on other sites
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