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import urllib3
from bs4 import BeautifulSoup
import hashlib
import sqlite3
import time
from sqlite3 import Error
#########################
# Configuration options #
#########################
# configure these to your needs:
# Where the resulting RSS feed XML should be written to:
xml_out = "/home/micha/websites/exitnode.net/htdocs/ard_teletext.xml"
# Location of your database file:
db = r"/home/micha/teletext.db"
# Number of articles in the RSS XML file:
articles = "20"
# Source URL of teletext service:
url = "https://www.ard-text.de/mobil/"
################
# DB functions #
################
# creates a connection to the SQLite database
def create_conn(db_file):
conn = None
try:
conn = sqlite3.connect(db_file)
return conn
except Error as e:
print(e)
return conn
# creates necessary tables inside the SQLite database
def create_tables(conn):
sql = """CREATE TABLE IF NOT EXISTS tafeln (
unixtime int NOT NULL,
hash text PRIMARY KEY,
tafel int,
description text,
title text,
rubrik text
); """
try:
c = conn.cursor()
c.execute(sql)
return conn
except Error as e:
print(e)
# inserts the text of a teletext tafel into the database
def insert_tafel(conn, content):
sql = ''' INSERT INTO tafeln(unixtime,hash,tafel,description,title,rubrik)
VALUES(?,?,?,?,?,?) '''
try:
c = conn.cursor()
c.execute(sql, content)
conn.commit()
return c.lastrowid
except Error as e:
err = e
# returns the latest n tafeln
def get_tafeln(conn):
sql = "SELECT description,title,rubrik from tafeln order by unixtime desc limit " + articles
try:
c = conn.cursor()
c.execute(sql)
rows = c.fetchall()
return rows
except Error as e:
print(e)
# Cleanup db table
def cleanup_db(conn):
sql = "DELETE FROM tafeln WHERE unixtime NOT IN (SELECT unixtime from tafeln order by unixtime desc limit " + articles + ")"
try:
c = conn.cursor()
c.execute(sql)
conn.commit()
except Error as e:
print(e)
#################
# program logic #
#################
# downloads a teletext tafel and prepares it for database storage
def download_tafel(conn, tafel, rubrik):
link = url+str(tafel)
http = urllib3.PoolManager()
r = http.request('GET', link)
soup = BeautifulSoup(r.data, 'html.parser')
desc = soup.find('div', class_='std')
title = soup.find('h2')
if desc is not None and title is not None:
title = title.text.replace("<h1>","")
title = title.replace("<b>","")
title = title.replace("</h1>","")
title = title.replace("</b>","")
unixtime = time.time()
desc = desc.text
desc_hash = hashlib.md5(desc.encode('utf-8')).hexdigest()
content = (unixtime,desc_hash,tafel,desc,title,rubrik)
insert_tafel(conn,content)
# generates the RSS feed XML based on database content
def gen_rss(rows):
f = open(xml_out, "w")
out = """<?xml version="1.0" encoding="UTF-8" ?>
<rss version="2.0">
<channel>
<title>ARD Teletext RSS Feed (inoffiziell)</title>
<link>https://github.com/exitnode/teletext-rss</link>
<description>RSS Feed des ARD Teletexts (Tafeln 104 bis 129)</description>"""
for r in rows:
desc = r[0]
title = r[1]
rubrik = r[2]
if desc is not None:
desc = desc.replace("\n"," ")
desc = desc.strip()
out+= """
<item>
<title>""" + rubrik + ": " + title + """</title>
<description>""" + desc + """</description>
</item>"""
out += """
</channel>
</rss>
"""
f.write(out)
f.close()
# the main funtion
def main():
conn = create_conn(db)
if conn is not None:
create_tables(conn)
for s in range(104, 129):
download_tafel(conn,s,"Nachrichten")
for s in range(136, 144):
download_tafel(conn,s,"Aus aller Welt")
rows = get_tafeln(conn)
gen_rss(rows)
cleanup_db(conn)
else:
print("Error: No db conn")
if __name__ == "__main__":
main()