ref: bfcea682698889e5b77ef1d0015b9f8d9b0ac637
research/scraper.py
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#!/bin/python """ js interface: http://www.ztm.poznan.pl/themes/ztm/dist/js/app.js nodes: http://www.ztm.poznan.pl/goeuropa-api/all-nodes stops in node: http://www.ztm.poznan.pl/goeuropa-api/node_stops/{node:symbol} stops: http://www.ztm.poznan.pl/goeuropa-api/stops-nodes bike stations: http://www.ztm.poznan.pl/goeuropa-api/bike-stations """ import json import hashlib import os import re import sqlite3 import sys import time import requests from bs4 import BeautifulSoup def get_nodes(): """ get nodes """ session = requests.session() index = session.get('https://www.ztm.poznan.pl/goeuropa-api/all-nodes', verify='bundle.pem') return [(stop['symbol'], stop['name']) for stop in json.loads(index.text)] def get_stops(node): """ get stops """ session = requests.session() index = session.get('https://www.ztm.poznan.pl/goeuropa-api/node_stops/{}'.format(node), verify='bundle.pem') stops = [] for stop in json.loads(index.text): stop_id = stop['stop']['id'] number = re.findall("\\d+", stop['stop']['symbol'])[0] lat = stop['stop']['lat'] lon = stop['stop']['lon'] directions = ', '.join(['{} → {}'.format(transfer['name'], transfer['headsign']) for transfer in stop['transfers']]) stops.append((stop_id, node, number, lat, lon, directions)) return stops def get_lines(): """ get lines """ session = requests.session() index = session.get('https://www.ztm.poznan.pl/goeuropa-api/index', verify='bundle.pem') soup = BeautifulSoup(index.text, 'html.parser') lines = {line['data-lineid']: line.text for line in soup.findAll(attrs={'class': re.compile(r'.*\blineNo-bt\b.*')})} return lines def get_route(line_id): """ get routes """ session = requests.session() index = session.get('https://www.ztm.poznan.pl/goeuropa-api/line-info/{}'.format(line_id), verify='bundle.pem') soup = BeautifulSoup(index.text, 'html.parser') directions = soup.findAll(attrs={'class': re.compile(r'.*\baccordion-item\b.*')}) routes = {} for direction in directions: direction_id = direction['data-directionid'] route = [{'id': stop.find('a')['data-stopid'], 'name': stop['data-name'], 'onDemand': re.search('stop-onDemand', str(stop['class'])) != None} for stop in direction.findAll(attrs={'class': re.compile(r'.*\bstop-itm\b.*')})] routes[direction_id] = route return routes def get_stop_times(stop_id, line_id, direction_id): """ get timetable """ session = requests.session() index = session.post('https://www.ztm.poznan.pl/goeuropa-api/stop-info/{}/{}'. format(stop_id, line_id), data={'directionId': direction_id}, verify='bundle.pem') soup = BeautifulSoup(index.text, 'html.parser') legends = {} for row in soup.find(attrs={'class': re.compile(r'.*\blegend-box\b.*')}).findAll('li'): row = row.text.split('-') row[0] = row[0].rstrip() row[1] = row[1].lstrip() if row[0] != '_': legends[row[0]] = '-'.join(row[1:]) schedules = {} for mode in soup.findAll(attrs={'class': re.compile(r'.*\bmode-tab\b.*')}): mode_name = mode['data-mode'] schedule = {row.find('th').text: [ {'time': minute.text, 'lowFloor': re.search('n-line', str(minute['class'])) != None} for minute in row.findAll('a')] for row in mode.find(attrs={'class': re.compile(r'.*\bscheduler-hours\b.*')}). findAll('tr')} schedule_2 = {hour: times for hour, times in schedule.items() if times != []} schedule = [] for hour, deps in schedule_2.items(): for dep in deps: schedule.append((hour, *describe(dep['time'], legends), dep['lowFloor'])) schedules[mode_name] = schedule return schedules, hashlib.sha512(index.text.encode('utf-8')).hexdigest() def describe(dep_time, legend): """ describe departure """ desc = [] while re.match('^\\d+$', dep_time) is None: if dep_time[-1] != ',': desc.append(legend[dep_time[-1]]) dep_time = dep_time[:-1] return (int(dep_time), '; '.join(desc)) def main(): """ main function """ if os.path.exists('timetable.db'): return print(time.time()) with sqlite3.connect('timetable.db') as connection: print('creating tables') cursor = connection.cursor() cursor.execute('create table nodes(symbol TEXT PRIMARY KEY, name TEXT)') cursor.execute('create table stops(id TEXT PRIMARY KEY, symbol TEXT \ references node(symbol), number TEXT, lat REAL, lon REAL, headsigns TEXT)') cursor.execute('create table lines(id TEXT PRIMARY KEY, number TEXT)') cursor.execute('create table timetables(id INTEGER PRIMARY KEY, stop_id \ TEXT references stop(id), line_id TEXT references line(id), \ headsign TEXT, checksum TEXT)') cursor.execute('create table departures(id INTEGER PRIMARY KEY, timetable_id INTEGER \ references timetable(id), hour INTEGER, minute INTEGER, mode TEXT, \ lowFloor INTEGER, modification TEXT)') print('getting nodes') nodes = get_nodes() cursor.executemany('insert into nodes values(?, ?);', nodes) nodes_no = len(nodes) print('getting stops') node_i = 1 for symbol, _ in nodes: print('\rstop {}/{}'.format(node_i, nodes_no), end='') sys.stdout.flush() cursor.executemany('insert into stops values(?, ?, ?, ?, ?, ?);', get_stops(symbol)) node_i += 1 print('') lines = get_lines() lines_no = len(lines) line_i = 1 tti = 0 cursor.executemany('insert into lines values(?, ?);', lines.items()) for line_id, _ in lines.items(): route = get_route(line_id) routes_no = len(route) route_i = 1 for direction, stops in route.items(): stops_no = len(stops) stop_i = 1 for stop in stops: print('line {}/{} route {}/{} stop {}/{}'. format(line_i, lines_no, route_i, routes_no, stop_i, stops_no), end='') sys.stdout.flush() timetables, checksum = get_stop_times(stop['id'], line_id, direction) cursor.execute('insert into timetables values(?, ?, ?, ?, ?);', (tti, stop['id'], line_id, stops[-1]['name'], checksum)) for mode, times in timetables.items(): cursor.executemany('insert into departures values(null, ?, ?, ?, ?, ?, ?);', [(tti, hour, minute, mode, lowfloor, desc) for hour, minute, desc, lowfloor in times]) stop_i += 1 tti += 1 print('{}\r'.format(' '*35), end='') sys.stdout.flush() route_i += 1 print('') line_i += 1 print(time.time()) if __name__ == '__main__': main() |