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bus.py
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bus.py
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import requests
import pickle
import os
import time
from bs4 import BeautifulSoup
from bus_routers import Routers
from InvalidParameterException import InvalidParameterException
class Bus:
def __init__(self):
self.headers = {
'User-Agent': 'Mozilla/5.0 (iPhone; CPU iPhone OS 10_3_2 like Mac OS X) AppleWebKit/603.2.4 '
'(KHTML, like Gecko) Mobile/14F89 MicroMessenger/6.5.10 NetType/WIFI Language/zh_CN'
}
self.homepage_url = 'https://shanghaicity.openservice.kankanews.com/'
self.query_router_url = 'https://shanghaicity.openservice.kankanews.com/public/bus'
self.query_sid_url = 'https://shanghaicity.openservice.kankanews.com/public/bus/get'
self.query_router_details_url = 'https://shanghaicity.openservice.kankanews.com/public/bus/mes/sid/'
self.query_stop_url = 'https://shanghaicity.openservice.kankanews.com/public/bus/Getstop'
def _homepage(self):
r = self.s.get(self.homepage_url, headers=self.headers)
return r
def _query_router_page(self):
self.headers['Referer'] = self.homepage_url
r = self.s.get(self.query_router_url, headers=self.headers)
return r
def _query_sid(self, router_name):
data = {'idnum': router_name}
r = self.s.post(self.query_sid_url, data=data, headers=self.headers)
sid = r.json()['sid']
return sid
def _query_router_details_page(self, sid, direction='0'):
self.headers['Referer'] = self.query_router_url
url = self.query_router_details_url + sid + '?stoptype=' + direction
r = self.s.get(url, headers=self.headers)
return r
def _query_stop(self, sid, direction, stop_id):
data = {'stoptype': direction, 'stopid': stop_id, 'sid': sid}
self.headers['Content-Type'] = 'application/x-www-form-urlencoded'
self.headers['Referer'] = self.query_router_details_url
r = self.s.post(self.query_stop_url, data=data, headers=self.headers)
return r
def _init_request(self, router_name):
self._check_routers(router_name)
if os.path.exists('session.log'):
with open('session.log', 'rb') as f:
session = pickle.load(f)
if session['expired_at']+1800 < time.time():
# session expired
self._make_session()
else:
# read session from cache
self.s = session['session']
else:
# session not exists
self._make_session()
# 第三步：查询公交路线对应的sid
sid = self._query_sid(router_name)
return sid
def _make_session(self):
self.s = requests.Session()
# 第一步：加载首页
self._homepage()
# 第二部：加载查询页面
self._query_router_page()
with open('session.log', 'wb') as f:
session = {
'session': self.s,
'expired_at': time.time()
}
pickle.dump(session, f)
def _check_routers(self, router_name):
if router_name not in Routers:
raise InvalidParameterException('router_not_exists', '不存在该公交线路', 400)
def query_stop(self, router_name, direction, stop_id):
sid = self._init_request(router_name)
# 查询公交到站信息
r = self._query_stop(sid, direction, stop_id)
res = r.json()
if type(res) is list:
res = res[0]
return {
'router_name': res['@attributes']['cod'],
'direction': direction,
'plate_number': res['terminal'],
'stop_interval': res['stopdis'],
'distance': res['distance'],
'time': res['time'],
'status': 'running'
}
else:
return {
'router_name': router_name,
'direction': direction,
'plate_number': '',
'stop_interval': '',
'distance': '',
'time': '',
'status': 'waiting'
}
def query_router(self, router_name, direction='0'):
self.sid = self._init_request(router_name)
# 进入公交线路明细页面
r = self._query_router_details_page(self.sid, direction)
soup = BeautifulSoup(r.text.encode(r.encoding), 'lxml')
stations = soup.select('div.upgoing.cur span')
from_station = stations[0].string
to_station = stations[1].string
strat_at = soup.select('div.upgoing.cur em.s')[0].string
end_at = soup.select('div.upgoing.cur em.m')[0].string
stations = soup.select('div.station')
stops = []
for station in stations:
router = {}
for c in station.children:
if c.name == 'span':
if c.attrs['class'][0] == 'num':
router['stop_id'] = c.string
elif c.attrs['class'][0] == 'name':
router['stop_name'] = c.string
stops.append(router)
return {
'from': from_station,
'to': to_station,
'start_at': strat_at,
'end_at': end_at,
'direction': direction,
'stops': stops
}
def query_router_details(self, router_name, direction='0'):
router = self.query_router(router_name, direction)
stops = router['stops']
for stop in stops:
# 查询公交到站信息
r = self._query_stop(self.sid, direction, stop['stop_id'])
res = r.json()
if type(res) is list:
res = res[0]
stop['plate_number'] = res['terminal']
stop['stop_interval'] = res['stopdis']
stop['distance'] = res['distance']
stop['time'] = res['time']
stop['status'] = 'running'
else:
stop['plate_number'] = ''
stop['stop_interval'] = ''
stop['distance'] = ''
stop['time'] = ''
stop['status'] = 'waiting'
return router
if __name__ == '__main__':
router_name = '406路'
direction = '0'
stop_id = '4'
bus = Bus()
stops = bus.query_router(router_name)
print(stops)
r = bus.query_stop(router_name, direction, stop_id)
print(r)
r = bus.query_router_details(router_name, direction)
print(r)