用Python2写成，为什么不用Lua？因为我不会

'''
Created on 2012-9-10
@author: hh
'''
import cookielib
import urllib2
import urllib
import time
username="Chetter.Hummin"
password="password"
def login(usr, pwd):
    'login function'
    cj = cookielib.CookieJar()
    opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj))
    opener.addheaders = [('User-agent','Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/21.0.1180.89 Safari/537.1')]
    url_login = 'http://bbs.sarabalst.com/2b/login.php'
    body={"step":"2","pwuser":usr,"cktime":"31536000","pwpwd":pwd,"lgt":"0"}
    print 'login to get cookies'
    urllib2.install_opener(opener)
    req = urllib2.Request(url_login,urllib.urlencode(body))
    resp = urllib2.urlopen(req)
    #print (resp.read())

if __name__ == '__main__':
    login(username,password)
    print "login success"
    print (time.strftime('%Y-%m-%d %H:%M',time.localtime(time.time())))
    for i in range(0,23):
        try:
            str=urllib2.urlopen("http://bbs.sarabalst.com/2b/",timeout=100).read()
            #print "success"
        except:
            str=""
            #print "fail"
        if str!="":
            print str
            print "refresh success"
        else:
            print "refresh fail"
        print (time.strftime('%Y-%m-%d %H:%M',time.localtime(time.time())))
        time.sleep(300);

在openwrt上测试成功。理论上可以加入crontab，现在还没测试（时间不够）
update :鉴于论坛和路由器双重不给力，给urllib2设了超时