Download all the pdf files linked in a given webpage.

grab_pdfs.py

#!/usr/bin/env python

"""
Download all the pdfs linked on a given webpage

Usage -

    python grab_pdfs.py url <path/to/directory>
        url is required
        path is optional. Path needs to be absolute
        will save in the current directory if no path is given
        will save in the current directory if given path does not exist

Requires - requests >= 1.0.4
           beautifulsoup >= 4.0.0

Download and install using
    
    pip install requests
    pip install beautifulsoup4
"""

__author__= 'elssar <elssar@altrawcode.com>'
__license__= 'MIT'
__version__= '1.0.0'

from requests import get
from urlparse import urljoin
from os import path, getcwd
from bs4 import BeautifulSoup as soup
from sys import argv

def get_page(base_url):
    req= get(base_url)
    if req.status_code==200:
        return req.text
    raise Exception('Error {0}'.format(req.status_code))

def get_all_links(html):
    bs= soup(html)
    links= bs.findAll('a')
    return links

def get_pdf(base_url, base_dir):
    html= get_page()
    links= get_all_links(html)
    if len(links)==0:
        raise Exception('No links found on the webpage')
    n_pdfs= 0
    for link in links:
        if link['href'][-4:]=='.pdf':
            n_pdfs+= 1
            content= get(urljoin(base_url, link['href']))
            if content.status==200 and content.headers['content-type']=='application/pdf':
                with open(path.join(base_dir, link.text+'.pdf'), 'wb') as pdf:
                    pdf.write(content.content)
    if n_pdfs==0:
        raise Exception('No pdfs found on the page')
    print "{0} pdfs downloaded and saved in {1}".format(n_pdfs, base_dir)

if __name__=='__main__':
    if len(argv) not in (2, 3):
        print 'Error! Invalid arguments'
        print __doc__
        exit(-1)
    arg= ''
    url= argv[1]
    if len(argv)==3:
        arg= argv[2]
    base_dir= [getcwd(), arg][path.isdir(arg)]
    try:
        get_pdf(base_dir)
    except Exception, e:
        print e
        exit(-1)

I get pdf_get() requires exactly 2 args

Me too.

I tried the following modification which solved the problem "pdf_get() requires exactly 2 args":
Change line 41 to html= get_page(base_url)
Change line 68 to get_pdf(url ,base_dir)

However, the script gives new error "An exception has occurred, use %tb to see the full traceback.
SystemExit: -1".
I traced back the error but cannot find a solution to get this working.
Helps will be appreciated. Thanks.

Nice Code, Worked like a charm! Couple of tweaks and i was able to download all the pdf files.

I also get the "pdf_get() requires exactly 2 args" error whatever I do.

If I got it right, the point about the "2 args" error would be an approach to test if both arguments, base_url and base_dir, were present in the call of the function? But it is strange, Python would immediately rise an exception if we try to run this code without providing the arguments. I did some modifications to this code and it is running.

https://gist.github.com/Felipe-UnB/5c45ea5a8a7910b35dc31fbc750dad58

The easiest solution to this is to just use the wget command on the terminal
For example:
wget -r -P ./pdfs -A pdf http://kea.kar.nic.in/

@danny311296 Your code returns an error

>>> wget -r -P ./pdfs -A pdf http://kea.kar.nic.in/
  File "<stdin>", line 1
    wget -r -P ./pdfs -A pdf http://kea.kar.nic.in/
                ^
SyntaxError: invalid syntax

@Adisain It should work on Ubuntu and most Unix systems.

Maybe try
wget -r -P pdfs -A pdf http://kea.kar.nic.in/
instead on other systems

Thanks @danny311296

@danny, the command works amazingly for the above website, Please for the website https://nclt.gov.in it is throwing cannot verify certificate error, so should i try python codes?