ref: v1.0.1
research/scraper.py
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 |
#!/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() |