关于post包参数VIEWSTATE

具体解决办法如下：
def get_hiddenvalue(url):
request=urllib.request.Request(url)
reponse=urllib.request.urlopen(request)
resu=reponse.read()
html = resu.decode(‘utf-8‘) # python3
VIEWSTATE =re.findall(r‘<input type="hidden" name="VIEWSTATE" id="VIEWSTATE" value="(.?)" />‘, html,re.I)
EVENTVALIDATION =re.findall(r‘<input type="hidden" name="EVENTVALIDATION" id="EVENTVALIDATION" value="(.?)" />‘, html,re.I)
return VIEWSTATE[0],EVENTVALIDATION[0]

编写函数先访问一次网页。随后获取该值之后再发送post包 。解决！

全部源码如下：
import requests
import urllib.request
import re
NIAN = ‘2017‘
YUE = ‘12‘
RI = ‘30‘
url = ‘http://www.hkexnews.hk/sdw/search/mutualmarket_c.aspx‘
def get_hiddenvalue(url):
request=urllib.request.Request(url)
reponse=urllib.request.urlopen(request)
resu=reponse.read()
html = resu.decode(‘utf-8‘) # python3
VIEWSTATE =re.findall(r‘<input type="hidden" name="VIEWSTATE" id="VIEWSTATE" value="(.?)" />‘, html,re.I)
EVENTVALIDATION =re.findall(r‘<input type="hidden" name="EVENTVALIDATION" id="EVENTVALIDATION" value="(.?)" />‘, html,re.I)
return VIEWSTATE[0],EVENTVALIDATION[0]
VIEWSTATE, EVENTVALIDATION=get_hiddenvalue(url)
data = {
‘EVENTVALIDATION‘:EVENTVALIDATION,
‘VIEWSTATE‘:VIEWSTATE,
‘__VIEWSTATEGENERATOR‘:‘EC4ACD6F‘,
‘btnSearch.x‘:‘23‘,
‘btnSearch.y‘:‘12‘,
‘ddShareholdingDay‘:NIAN,
‘ddShareholdingMonth‘:YUE,
‘ddShareholdingYear‘:RI,
‘today‘:‘20180509‘
}
html_post = requests.post(url, data=data)
print(html_post.text)

关于post包参数VIEWSTATE

原文：http://blog.51cto.com/12541359/2114511