initial commit
This commit is contained in:
Johannes Schauer
commit
4dd9907c39
1 changed files with 479 additions and 0 deletions
479
parser.py
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479
parser.py
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from urllib2 import Request, urlopen
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from urllib import urlencode, quote_plus, urlretrieve
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from gzip import GzipFile
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from cStringIO import StringIO
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from zlib import decompress
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from struct import unpack
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from time import sleep
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from datetime import timedelta, date, datetime
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from lxml import etree
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def get_id(station):
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return get_ids(station+"!")[0]
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def search_ids(station):
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return get_ids(station+"?")
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def get_ids(query):
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req = Request("http://railnavigator.bahn.de/bin/rnav/query.exe/dn",
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'<?xml version="1.0" encoding="UTF-8" ?><ReqC ver="1.1" prod="String" lang="DE"><MLcReq><MLc n="%s" t="ST" /></MLcReq></ReqC>'%query,
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{"User-Agent":"Java/1.6.0_0"})
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# <MLc t="ST" n="Bahlen Germann "Bahler Buur", Dinklage" i="A=1@O=Bahlen Germann "Bahler Buur", Dinklage@X=81
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# grrrrrrrrr - too stupid to escape their xml!!!!
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parser = etree.XMLParser(recover=True, encoding='iso-8859-1')
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tree = etree.parse(urlopen(req), parser)
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# make sure None entries from badly parsed nodes are not in the output
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return [elem.get("i") for elem in tree.findall(".//MLc") if elem.get("i")]
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def parse_i(i):
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tokens = i.strip('@').split("@")
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d = dict()
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for t in tokens:
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key, value = t.split("=", 1)
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d[key] = value
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return d
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def compile_i_from_station(station):
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return get_id(station)
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def compile_i_from_stationid(stationid):
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return "A=1@L=%09d@"%stationid
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def compile_i_from_coords(x, y, name=None):
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if not name:
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name="---"
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return "A=16@O=%s@X=%d@Y=%d@"%(name, int(x*1000000), int(y*1000000))
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#infile = open("../cities_germany_211009.clean.txt", "r")
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#outfile = open("../cities_germany_291009.out.txt", "w")
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#for city in infile:
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# print city,
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# for station in search_ids(city):
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# outfile.write("%s\t%s\t%s\t%s\n"%(station["O"], station["X"], station["Y"], station["L"]))
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# sleep(10)
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#infile.close()
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#outfile.close()
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#exit()
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#big plan
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def get_big_pln_data():
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req = Request("http://persoenlicherfahrplan.bahn.de/bin/pf/query-p2w.exe/dn",
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urlencode({"start":"1",
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"pp":"5",
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"ZID":"A=1@X=10885568@Y=48365444@O=Augsburg Hbf@L=008000013@U=80@K=S1-0N1@G=8000013@C=49@a=128@B=1@",
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"output":"pln",
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"hcount":"0",
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"h2gversion":"6.20.7",
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"spmo":"1",
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"htype":"MicroEmulator-2.0",
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"SID":"A=1@X=6092250@Y=50767829@O=Aachen Hbf@L=008000001@U=80@K=S1-0N1@G=8000001@C=49@a=128@B=1@",
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"L":"vs_javapln",
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"p2wIVRoute":"1",
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"p2wCreateMaps":"1"}),
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{"User-Agent":"Java/1.6.0_0"})
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tokens = urlopen(req).read().split()
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time = ""
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url = ""
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for t in tokens:
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key, value = t.split("=", 1)
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if key == "url":
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url = value
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elif key == "time":
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time = value
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def test_pln():
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url2 = ""
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while url2 == "":
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tokens = urlopen(url).read().strip().split("\n")
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print tokens
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for t in tokens:
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key, value = t.split("=", 1)
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if key == "url":
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url2 = value
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break
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elif key == "time":
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sleep(10)
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print value
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urlretrieve(url2, "pln")
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# next: ignoreMinuteRound=yes&REQ0HafasScrollDir=1&h2g-direct=1&seqnr=1&ident=ox.0348695.1256054390&
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def get_departures(station, dt):
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if isinstance(station, str):
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station = parse_i(get_id(station))["L"]
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req = Request("http://mobile.bahn.de/bin/mobil/bhftafel.exe/dn?",
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urlencode({
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"start":"yes",
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"date":dt.strftime("%d.%m.%Y"),
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"time":dt.strftime("%H:%M"),
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"boardType":"dep",
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"sTI":"0",
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"L":"vs_java3",
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"input":dep_station,
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"productsFilter":"1"*14
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}),
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{"User-Agent":"Java/1.6.0_0"})
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stops = urlopen(req).read()[4:-4].split("\n/>\n<Journey ")
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result = list()
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for stop in stops:
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tokens = stop.split("\n")
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evaid, name = tokens[0].split(" ", 1)
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s = dict()
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s["L"] = evaid.split("=")[1].strip("\"")
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s["O"] = name.split("=")[1].strip("\"")
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for t in tokens[1:]:
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key, value = t.split("=", 1)
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value = value.strip("\" ")
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if value:
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s[key] = value
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result.append(s)
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return result
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def get_stops(train, dep_station, arr_station, dt):
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if isinstance(station, str):
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station = parse_i(get_id(station))["L"]
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req = Request("http://mobile.bahn.de/bin/mobil/bhftafel.exe/dn?",
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urlencode({
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"start":"yes",
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"REQTrain_name":train,
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"date":dt.strftime("%d.%m.%Y"),
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"time":dt.strftime("%H:%M"),
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"boardType":"dep",
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"sTI":"1",
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"L":"vs_java3",
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"input":dep_station,
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"dirInput":arr_station,
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"productsFilter":"1"*14
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}),
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{"User-Agent":"Java/1.6.0_0"})
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stops = urlopen(req).read()[4:-4].split("\n/>\n<St ")
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result = list()
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for stop in stops:
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tokens = stop.split("\n")
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evaid, name = tokens[0].split(" ", 1)
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s = dict()
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s["L"] = evaid.split("=")[1].strip("\"")
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s["O"] = name.split("=")[1].strip("\"")
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for t in tokens[1:]:
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key, value = t.split("=", 1)
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value = value.strip("\" ")
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if value:
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s[key] = value
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result.append(s)
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return result
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#late:
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#http://mobile.bahn.de/bin/mobil/bhftafel.exe/dn?
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# start=yes
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# &time=actual
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# &rT.2=13%3A51
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# &rT.1=13%3A51
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# &boardType=dep
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# &hcount=0
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# &h2gversion=6.20.7
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# &rZ.2=RE%2010125
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# &htype=MicroEmulator-2.0
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# &rZ.1=RE%2010125
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# &L=vs_java
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# &input=%238000001&
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def get_pln_data(start, end, stop1=None, stop2=None, dt=None, bike=False,
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ice=True, ic=True, ir=True, re=True, sbahn=True, bus=True, boat=True,
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subway=True, tram=True, taxi=True):
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if dt is None:
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dt = datetime.now()
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query = {"ignoreMinuteRound":"yes",
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"date":dt.strftime("%d.%m.%Y"),
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"ZID":end,
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"h2g-direct":"1",
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"time":dt.strftime("%H:%M"),
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"SID":start,
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"start":"1"}
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if not all([ice, ic, ir, re, sbahn, bus, boat, subway, tram, taxi]):
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query["REQ0JourneyProduct_prod_list_1"] = \
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"".join(str(int(x)) for x in [ice, ic, ir, re, sbahn, bus, boat, subway, tram, taxi])+"1111"
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if bike:
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query["REQ0JourneyProduct_opt3"] = "1"
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if stop1:
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query["VID1"]=stop1
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if stop2:
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query["VID2"]=stop2
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req = Request("http://mobile.bahn.de/bin/mobil/query.exe/dn",
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urlencode(query),
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{"User-Agent":"Java/1.6.0_0"})
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r = urlopen(req) # is a file like object but does not have tell()
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s = StringIO(r.read()) # this is why a stringio has to be created for gzip
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return GzipFile(mode="r", fileobj=s) # possibly replacable by manually reading the gzip header
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class PlnParse:
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"""
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all data in little endian
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offsets are always counted from start of the file
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latitude, longitude are in wgs84 format
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ushort is of size 2
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uint is of size 4
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"""
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def __init__(self, fh):
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self.f = fh
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self.strings = dict()
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self.connections = list()
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self.f.seek(0x00)
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self.version, = unpack("<H", self.f.read(2))
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"""
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pos type description
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0x00 ushort version
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"""
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if self.version != 5:
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raise IOError, "unknown version: %d"%self.version
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self.f.seek(0x02)
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start_station, u1, sX, sY = unpack("<H3I", self.f.read(14))
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"""
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pos type description
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0x02 ushort string reference to start station name
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0x04 uint unknown
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0x08 uint longitude of start station
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0x0C uint latitude of start station
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"""
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self.f.seek(0x10)
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end_station, u1, eX, eY = unpack("<H3I", self.f.read(14))
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"""
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pos type description
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0x10 ushort string reference to end station name
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0x12 uint unknown
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0x16 uint longitude of end station
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0x1A uint latitude of end station
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"""
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self.f.seek(0x1e)
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number_of_conn, self.frequencies_offset, self.strings_offset = unpack("<HII", self.f.read(10))
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"""
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pos type description
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0x1e ushort number of connections found
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0x20 uint position of connection frequency data
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0x24 uint position of string block
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"""
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#print "number_of_conn: %d, frequencies_offset: %d, strings_offset: %d"%(number_of_conn, self.frequencies_offset, self.strings_offset)
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#now that we read the string_offset, get the station names
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self.start_station = {"name":self.get_string(start_station), "X":sX, "Y":sY}
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self.end_station = {"name":self.get_string(end_station), "X":eX, "Y":eY}
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self.f.seek(0x28)
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timetable_begin, timetable_end, today, timetable_remaining = unpack("<4H", self.f.read(8))
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"""
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pos type description
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0x28 ushort begin date of current timetable version
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0x2a ushort end date of current timetable version
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0x2c ushort date of query
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0x2e ushort remaining days in current timetable version
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"""
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self.timetable_info = {
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"timetable_begin":self.parse_date(timetable_begin),
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"timetable_end":self.parse_date(timetable_end),
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"today":self.parse_date(today),
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"timetable_remaining":timetable_remaining}
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self.f.seek(0x30)
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#print "unknown string: %s"%self.f.read(6)
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self.f.seek(0x36)
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self.cities_offset, self.train_props_offset \
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= unpack("<II", self.f.read(8))
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"""
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pos type description
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0x36 uint position of city descriptions
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0x3a uint position of train property data
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"""
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#TODO: <begin big (46 bytes) ugly unknown section>
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# a lot of unknown stuff which consists either of never changing data
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# or of zero-ed data
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# but seems to be not important for the rest as its size is static and
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# no static information seems to be missing
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# probably 46 bytes of obsolete data?
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self.f.seek(0x3e)
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#print "cities_offset: %d, train_props_offset: %d"%(self.cities_offset, self.train_props_offset)
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additional_offset1, u2, additional_offset2 \
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= unpack("<3I", self.f.read(12))
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#print "additional_offset1: %d, u2: %d, additional_offset2: %d"%(additional_offset1, u2, additional_offset2)
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self.f.seek(additional_offset1)
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u1, = unpack("<H", self.f.read(2))
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#print "u1: %d"%u1
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self.f.seek(additional_offset2)
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u1, u2, u3, request_id, u5_offset, u6, u7, u8_offset, u9, u10, u11, u12 \
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= unpack("<IIHHIHHI4H", self.f.read(32))
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#print "u1: %d, u2: %d, u3: %d, request_id: %s, u5_offset: %d, u6: %d, u7: %s, u8_offset: %d, u9: %d, u10: %d, u11: %d, u12: %d"%(u1, u2, u3, self.get_string(request_id), u5_offset, u6, self.get_string(u7), u8_offset, u9, u10, u11, u12)
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# the only useful stuff:
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self.reqest_id = self.get_string(request_id)
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self.products = self.parse_products(self.get_string(u7))
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#TODO: </end big ugly unknown section>
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for i in xrange(number_of_conn):
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self.f.seek(0x4a + 12*i)
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freq, train_list_offset, number_of_trains, number_of_changes, duration \
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= unpack("<HI3H", self.f.read(12))
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"""
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0 <= i < number_of_conn
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|
pos type description
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|
0x4a+12*i ushort frequency of this connection
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0x4c+12*i uint position of train list after train_list_offset
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0x50+12*i ushort number of changes
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0x52+12*i ushort duration of this connection
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"""
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trains = list()
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for j in xrange(number_of_trains):
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|
self.f.seek(0x4a + train_list_offset + j*20)
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dep_time, dep_station, arr_time, arr_station, transportation, \
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train, arr_track, dep_track, note, train_proporties \
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= unpack("<10H", self.f.read(20))
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"""
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|
0 <= j < number_of_trains
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pos type description
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|
0x4a+train_list_offset+j*20 ushort departure time
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0x4a+train_list_offset+j*20 ushort departure station
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||||||
|
0x4a+train_list_offset+j*20 ushort arrival time
|
||||||
|
0x4a+train_list_offset+j*20 ushort arrival station
|
||||||
|
0x4a+train_list_offset+j*20 ushort transportation method
|
||||||
|
0x4a+train_list_offset+j*20 ushort train identification
|
||||||
|
0x4a+train_list_offset+j*20 ushort arrival track
|
||||||
|
0x4a+train_list_offset+j*20 ushort departure track
|
||||||
|
0x4a+train_list_offset+j*20 ushort notes like final destination of tram
|
||||||
|
0x4a+train_list_offset+j*20 ushort train proporties
|
||||||
|
"""
|
||||||
|
trains.append({
|
||||||
|
"dep_time":self.parse_time(dep_time),
|
||||||
|
"dep_station":self.get_city(dep_station),
|
||||||
|
"arr_time":self.parse_time(arr_time),
|
||||||
|
"arr_station":self.get_city(arr_station),
|
||||||
|
"transportation_type":self.parse_transportation(transportation),
|
||||||
|
"train":self.get_string(train),
|
||||||
|
"arr_track":self.get_string(arr_track),
|
||||||
|
"dep_track":self.get_string(dep_track),
|
||||||
|
"note":self.get_string(note),
|
||||||
|
"train_properties":self.get_train_props(train_proporties)})
|
||||||
|
self.connections.append({
|
||||||
|
"freq":self.get_frequency(freq),
|
||||||
|
"number_of_changes":number_of_changes,
|
||||||
|
"duration":self.parse_time(duration),
|
||||||
|
"trains":trains})
|
||||||
|
|
||||||
|
def parse_products(self, products):
|
||||||
|
"""
|
||||||
|
used means of transportation for a returned connection set is given as
|
||||||
|
10 chars being "1" or "0" depending wether the product is being
|
||||||
|
considered or not.
|
||||||
|
this method maps this string to a dict
|
||||||
|
"""
|
||||||
|
if products and len(products) == 14:
|
||||||
|
p = ["ice", "ic", "ir", "re", "sbahn", "bus", "boat", "subway", "tram", "taxi"]
|
||||||
|
return dict(zip(p, map(bool, map(int, products[:10]))))
|
||||||
|
|
||||||
|
def parse_time(self, time):
|
||||||
|
"""
|
||||||
|
time is stored as an integer which, when represented as a string can be
|
||||||
|
split to get a string representation of the time
|
||||||
|
1345 => 13:54
|
||||||
|
512 => 5:12
|
||||||
|
"""
|
||||||
|
time = "%03d"%time
|
||||||
|
return ":".join([time[:-2], time[-2:]])
|
||||||
|
|
||||||
|
def parse_date(self, d):
|
||||||
|
"""
|
||||||
|
dates are expressed as integers of days since 01.01.1980
|
||||||
|
"""
|
||||||
|
return date(1980, 1, 1)+timedelta(days=d)
|
||||||
|
|
||||||
|
def parse_transportation(self, t):
|
||||||
|
"""
|
||||||
|
transportation can be by some train or by foot
|
||||||
|
"""
|
||||||
|
if t == 1:
|
||||||
|
return "feet"
|
||||||
|
elif t == 2:
|
||||||
|
return "train"
|
||||||
|
else:
|
||||||
|
raise Exception, "transportation %d unexpected"%t
|
||||||
|
|
||||||
|
def get_frequency(self, offset):
|
||||||
|
"""
|
||||||
|
given the offset, get the frequency a connection is scheduled from the
|
||||||
|
data block beginning at frequencies_offset
|
||||||
|
the last three values are still a myth as they dont seem to correspond
|
||||||
|
with the information in the string referenced by the first value
|
||||||
|
"""
|
||||||
|
self.f.seek(self.frequencies_offset+offset)
|
||||||
|
#TODO: what do the last values mean?
|
||||||
|
#TODO: where are the days of service properly encoded?
|
||||||
|
freq, u1, u2, u3 = unpack("<4H", self.f.read(8))
|
||||||
|
return self.get_string(freq), u1, u2, u3
|
||||||
|
|
||||||
|
def get_string(self, offset):
|
||||||
|
"""
|
||||||
|
given the offset, return a zero terminated string from the stringblock
|
||||||
|
"""
|
||||||
|
if offset in self.strings:
|
||||||
|
# get it from dict to prevent ugly f.read(1)
|
||||||
|
return self.strings[offset]
|
||||||
|
else:
|
||||||
|
self.f.seek(self.strings_offset+offset)
|
||||||
|
result = ""
|
||||||
|
# read zero terminated string.. ugly in py..
|
||||||
|
while True:
|
||||||
|
b = self.f.read(1)
|
||||||
|
if b == "\0":
|
||||||
|
# some strings come with many whitespaces at the end
|
||||||
|
result = result.strip()
|
||||||
|
# by convention of the format "---" means None
|
||||||
|
if result == "---":
|
||||||
|
result = None
|
||||||
|
# fill a dict with strings to prevent too much ugly f.read(1)
|
||||||
|
self.strings[offset] = result
|
||||||
|
return result
|
||||||
|
else:
|
||||||
|
result += b
|
||||||
|
|
||||||
|
def get_train_props(self, offset):
|
||||||
|
"""
|
||||||
|
given the offset, get the string list of train properties from the
|
||||||
|
data block beginning at train_props_offset. the first ushort marks the
|
||||||
|
amount of properties
|
||||||
|
"""
|
||||||
|
self.f.seek(self.train_props_offset+offset)
|
||||||
|
n, = unpack("<H", self.f.read(2))
|
||||||
|
return map(self.get_string, unpack("<%dH"%n, self.f.read(2*n)))
|
||||||
|
|
||||||
|
def get_city(self, offset):
|
||||||
|
"""
|
||||||
|
given the offset, get data about a city from the data block beginning
|
||||||
|
at cities_offset.
|
||||||
|
the data includes the city name, its code and latitude, longitude
|
||||||
|
"""
|
||||||
|
self.f.seek(self.cities_offset+offset*14)
|
||||||
|
name, L, X, Y = unpack("<H3I", self.f.read(14))
|
||||||
|
return {"name":self.get_string(name), "L":L, "X":X, "Y":Y}
|
||||||
|
|
||||||
|
#f = open("pln", "r")
|
||||||
|
a = PlnParse(get_pln_data(compile_i_from_station("Bremen"), compile_i_from_station("Karlsruhe"), dt = datetime.today()+timedelta(days=1)))
|
||||||
|
#a = PlnParse(get_pln_data(compile_i_from_coords(8.6535, 53.1667), compile_i_from_station("Bremen"), dt = datetime.today()+timedelta(days=4)))
|
||||||
|
#a = PlnParse(f)
|
||||||
|
|
||||||
|
#def bin(i):
|
||||||
|
# return "".join(str((i >> y) & 1) for y in range(16-1, -1, -1))
|
||||||
|
#print a.timetable_info
|
||||||
|
for conn in a.connections:
|
||||||
|
print conn
|
||||||
|
#for conn in a.connections:
|
||||||
|
# print "\t".join([conn["freq"][0], bin(conn["freq"][1]), bin(conn["freq"][2]), bin(conn["freq"][3])])
|
||||||
|
#for conn in a.connections:
|
||||||
|
# print conn["freq"], conn["trains"][0]["dep_station"]["L"], conn["trains"][0]["train"], conn["trains"][0]["dep_time"]
|
||||||
Loading…
Reference in a new issue