这篇文章主要介绍了python实现的一个火车票转让信息采集器,采集信息来源是58同程或者赶集网,需要的朋友可以参考下。

#coding: utf-8

'''

春运查询火车票转让信息

Author: piglei2007@gmail.com

Date: 2011.01.25

'''

import re

import os

import time

import urlparse

import datetime

import traceback

import urllib2

import socket

socket.setdefaulttimeout(20)

BLANK_RE = re.compile(r"\s+")

opener = urllib2.build_opener(urllib2.HTTPCookieProcessor())

opener.addheaders = [

("User-agent", "Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.9.1) Gecko/20090704 Firefox/3.5"),

("Accept", "*/*"),

]

urllib2.install_opener(opener)

from BeautifulSoup import BeautifulSoup

SOURCE = {

"58": "http://bj.58.com/huochepiao/?Num=%(train)s&StartTime=%(date)s00",

"ganji": "http://bj.ganji.com/piao/cc_%(train)s/%(date)s/",

}

RECORD_FILE = "/tmp/ticket_records.txt"

def parse_record():

try:

return set([x.strip() for x in open(RECORD_FILE, "r").readlines()])

except IOError:

open(RECORD_FILE, "w")

return set()

def flush_record(records):

open(RECORD_FILE, "w").write("\n".join(records))

def main(config):

"""

开始抓取

"""

existed = parse_record()

to_email = []

for train in config["trains"]:

for date in config["dates"]:

for type, _url in SOURCE.items():

url = _url % dict(train=train, date=date)

content = urllib2.urlopen(url).read()

soup = BeautifulSoup(content)

result = parse_content(type, soup, train)

for url, text in result:

url = urlparse.urljoin(_url, url)

# 只要卧铺！

if url not in existed and u"卧" in text:

to_email.append([text, url])

existed.add(url)

if to_email:

content = "".join(

[x for x in [" | ".join(y) for y in to_email]]

).encode("utf-8")

simple_mail(config["people"], content)

flush_record(existed)

def parse_content(type, soup, train):

"""

获得车次信息

"""

result = []

if type == "58":

info_table = soup.find("table", id="infolist")

if info_table:

for x in info_table.findAll("tr", text=re.compile(ur"%s(?!时刻表)" % train, re.I)):

a = x.parent

_text = BLANK_RE.sub("", a.text)

result.append([a["href"], _text])

if type == "ganji":

for x in soup.findAll("dl", {"class": "list_piao"}):

a = x.dt.a

result.append([a["href"], a.text])

return result

EMAIL_HOST = 'smtp.sohu.com'

EMAIL_HOST_USER = 'yourname@sohu.com'

EMAIL_HOST_PASSWORD = 'yourpassword'

EMAIL_PORT = 25

def simple_mail(to, content):

"""

发送邮件

"""

import smtplib

from email.mime.text import MIMEText

msgRoot = MIMEText(content, 'html', 'UTF-8')

msgRoot['Subject'] = "[%s]有票来啦！！！！" % datetime.datetime.today().isoformat(" ")

msgRoot['From'] = EMAIL_HOST_USER

msgRoot['To'] = ", ".join(to)

s = smtplib.SMTP(EMAIL_HOST, EMAIL_PORT)

s.login(EMAIL_HOST_USER, EMAIL_HOST_PASSWORD)

s.sendmail(EMAIL_HOST_USER, to, msgRoot.as_string())

s.close()

def switch_time_zone():

"""

切换时区

"""

os.environ["TZ"] = "Asia/Shanghai"

time.tzset()

switch_time_zone()

if __name__ == '__main__':

config = {

"trains": ("k471",),

"dates": ("20110129",),

"people": (

"youremail@sohu.com",

)

}

try:

main(config)

print "%s: ok" % datetime.datetime.today()

except Exception, e:

print traceback.format_exc()然后放入cron，你懂的。

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