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#!/usr/bin/python
# -*- encoding:utf-8 -*-
import cookielib, urllib2, urllib
import re

def get_postFormID(opener):
    temp = open('temp.txt', 'w+')
    form_url = 'http://blog.renren.com/blog/0/addBlog'
    lines = opener.open(form_url).readlines()
#   it seems the order of value and id is random
    pattern1 = r'.+value="(-?\d+)".+id="postFormId".+'
    pattern2 = r'.+id="postFormId".+value="(-?\d+)".+'
    for line in lines:
        postFormId1 = re.findall(pattern1, line)
        temp.write(line)
        if postFormId1:
            print postFormId1
            return postFormId[0]
        else:
            postFormId2 = re.findall(pattern2, line)
            if postFormId2:
                print postFormId2
                return postFormId2[0]
    print "not found!"
    return 0
   
#登陆校内网，取得cookie
def login(email, password):
    cj = cookielib.CookieJar()
    opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj))
    exheaders = [("User-Agent","Mozilla/4.0 (compatible; MSIE 7.1; Windows NT 5.1; SV1)"),]
    opener.addheaders=exheaders
    URL_LOGIN = 'http://www.renren.com/Login.do'
    body = (('email',email), ('password',password))
    req1 = opener.open(URL_LOGIN, urllib.urlencode(body))  #cookie在opener对象中，以后一直用opener来处理就不用登陆了
#    print "req1",req1.info()
#   for num,cookie in enumerate(cj):        #打印cookies
#        print "%d-----%s" % (num, cookie)
    return opener

def save_total_page(opener, url, name="totalpage.html"):
    fd = open(name, "w+")
    html = opener.open(url).read()
    fd.write(html)

def transcode(str):
    return str.decode('mbcs').encode('utf8')

#IMPORTANT: 更改登录名和密码
email = 'xxxx@xxx.xxx'
password = 'xxxxx'
body = {'relative_optype':'publisher', 'blogControl':'99', 'categoryId':'0', 'editBlogControl':'99' ,'isVip':'false'}
url_post = 'http://blog.renren.com/NewEntry.do'

if __name__ == "__main__":
    opener = login(email, password)
    postFormId = get_postFormID(opener)
    save_total_page(opener, 'http://blog.renren.com/', name='blog_home_before.html')
    body['postFormId'] = postFormId     #十分重要，与用户每次登陆的session绑定，是个随机值
    body['title'] = transcode('标题是也')
    body['body'] = transcode('正文是也，啊哈哈哈哈哈哈~')
#    print body
    req2 = opener.open(url_post, urllib.urlencode(body))    #提交POST请求，发表文章
    save_total_page(opener, 'http://blog.renren.com/', name='blog_home_after.html')