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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