File indexing completed on 2024-04-28 16:30:15

 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 #***************************************************************************
 #* SPDX-FileCopyrightText: 2022 S. MANKOWSKI stephane@mankowski.fr
 #* SPDX-FileCopyrightText: 2022 G. DE BURE support@mankowski.fr
 #* SPDX-License-Identifier: GPL-3.0-or-later
 #***************************************************************************
 
 """
 Created on Thu May 18 22:58:12 2017
 @author: c0redumb
 """
 
 # To make print working for Python2/3
 from __future__ import print_function
 
 # Use six to import urllib so it is working for Python2/3
 from six.moves import urllib
 # If you don't want to use six, please comment out the line above
 # and use the line below instead (for Python3 only).
 #import urllib.request, urllib.parse, urllib.error
 
 import time
 import sys
 
 '''
 Starting on May 2017, Yahoo financial has terminated its service on
 the well used EOD data download without warning. This is confirmed
 by Yahoo employee in forum posts.
 Yahoo financial EOD data, however, still works on Yahoo financial pages.
 These download links uses a "crumb" for authentication with a cookie "B".
 This code is provided to obtain such matching cookie and crumb.
 '''
 
 # Build the cookie handler
 cookier = urllib.request.HTTPCookieProcessor()
 opener = urllib.request.build_opener(cookier)
 urllib.request.install_opener(opener)
 
 # Cookie and corresponding crumb
 _cookie = None
 _crumb = None
 
 def _get_cookie_crumb(ticker):
     '''
     This function perform a query and extract the matching cookie and crumb.
     '''
     # Perform a Yahoo financial lookup
     url = 'https://finance.yahoo.com/quote/' + ticker
     hdr = { 'User-Agent' : 'Mozilla/5.0 (Windows NT 6.1; Win64; x64)',
         'content-type': 'text/html; charset=utf-8'}
     req = urllib.request.Request(url, headers=hdr)
     f = urllib.request.urlopen(req)
     alines = f.read()
     alines = alines.decode('utf-8')
 
     # Extract the crumb from the response
     global _crumb
     cs = alines.find('CrumbStore')
     cr = alines.find('crumb', cs + 10)
     cl = alines.find(':', cr + 5)
     q1 = alines.find('"', cl + 1)
     q2 = alines.find('"', q1 + 1)
     crumb = alines[q1 + 1:q2]
     _crumb = crumb
 
     # Extract the cookie from cookiejar
     global cookier, _cookie
     for c in cookier.cookiejar:
         if c.domain != '.yahoo.com':
             continue
         if c.name != 'B':
             continue
         _cookie = c.value
 
 def load_yahoo_quote(ticker, begindate, enddate, interval):
     '''
     This function load the corresponding history from Yahoo.
     '''
     # Check to make sure that the cookie and crumb has been loaded
     global _cookie, _crumb
     if _cookie == None or _crumb == None:
         _get_cookie_crumb(ticker)
         
     begindate = begindate.replace('-', '')
     enddate = enddate.replace('-', '')
 
     # Prepare the parameters and the URL
     tb = int(time.mktime((int(begindate[0:4]), int(begindate[4:6]), int(begindate[6:8]), 0, 0, 0, 0, 0, 0)))
     te = int(time.mktime((int(enddate[0:4]), int(enddate[4:6]), int(enddate[6:8]), 0, 0, 0, 0, 0, 0)))
     if te == tb:
         tb = tb -1 
 
     param = dict()
     param['period1'] = tb
     param['period2'] = te
     param['interval'] = interval
     param['events'] = 'history'
     param['crumb'] = _crumb
     params = urllib.parse.urlencode(param)
     url = 'https://query1.finance.yahoo.com/v7/finance/download/{}?{}'.format(ticker, params)
 
     # Perform the query
     # There is no need to enter the cookie here, as it is automatically handled by opener
     try:
         f = urllib.request.urlopen(url)
         alines = f.read().decode('utf-8')
         return sorted(alines.split('\n'), reverse=True)
     except IOError:
         return ["Date,Open,High,Low,Close,Adj Close,Volume"]
 
 
 for l in load_yahoo_quote(sys.argv[1], sys.argv[2], sys.argv[3], sys.argv[4]):
     print(l)